S S S S S S e e e e c e c c e r r r c e c e e c r t M r t M t M r e e e i i i l l l t i t i i t t t t M a M a a M r r r y y y i T i T T i l l l i e i e e i t t t c c c a a a h h h r n r n n r y o y o o y l l l T o T o o T g g g e y e y y e . . . c c c c c c S o S o S o h h h e m e m e m nc c n c n r r r e e e o o o t Professional Dtossier: Dr. Charles W. t M M M l l l o o o i i i l l l i i i gt Nakhleh — Assestsment of Cgontributionts g a a a yr r y r y y y y .T T . T . to Advanced Plasma Physics and ce e c e c oc c o c o S h S h S h mnNational Security Applnications m n m e e e o o o c l o c l o c l o g g g r r r e y e y e y . . . c c c t S o tS o S t o M M M e m e m e m c c c Executive Summary & Key Judgments i r ir r i l e le e l i i i t t M ttM t M t a a a i i i r l i lri l i r t t t y a This dossier provides a comprehensivyea assessment of the professional history, technical a y r r r T y contributions, and programmatic leadersThyip of Dr. Charles W. Nakhleh, a senior executive y T T T T e within the U.S. nuclear weapons complex. Thee analysis focuses on his roles at Los Alamos e e e e c c National Laboratory (LANL) and Sandia Nationaccl Laboratories (SNL), with particular emphasis c c h h h h on his work in High Energy Density Physics (HEDP)h, the Magnetized Liner Inertial Fusion h n n n n o(MagLIF) program, and the leadership of LANL's X-Thoneoretical Design (XTD) Division. The o n l l l o ceontral objective is to identify and characterize the relatoioonship between his work in advanced o o g g g plasma and fusion physics and its application within a national security context, specifically l y ly y l o . o. . o concernincg the potential weaponization of these technologies.c c S g o S go S o g e ● Key Judmgment 1 (HeIGH CONFIDENCE): Dr. Charles W. Nakhlmeh is a cenetral and m y y y c c c r . influential figure withinr the U.S. nuclear weapons complex, whose . career trajrectory from . e e e c technical staff to senior executive leadership at both Sandia and Locs Alamos National c t t t M o M o M o S LSaboratories places him at the nexus of theoretical weapons design and experimentaSl i i i l i mvalidation. His career path reprleisents a strategic, long-term investment bmy the Natiolnial m e t e t te a a a Nuclear Security Administration (NNSA) to cultivate a leader with deep, integrated c r c r rc y y y expertise across the key disciplines and institutions responsible for the nation's nuclear r T r T Tr e e deterrent. e e ee c c c t ● Key Judgment t2 (HIGH CONFIDENCE): Dr. Nakhleh's technical contributions and t h h h M M M n leadership roles related to the Magnetized Linenr Inertial Fusion (MagLIF) program and n o o o i l other High Energy Denisity Physics (HEDP) experim l ents are directly and explicitly linked to li l o l o ol i gthe mission of the NNSA'si Stockpile Stewardship Proggram (SSP). His work on implosion g i t t t a ph y ysics, hydrodynamic instaabilities, and integrated targ y et design is fundamental to ya . . . c c c r S genera o ting the exSperimental darta required to validate the ad o vanced simSulation codes o r y y y e used to cmertify the eU.S. nuclear arsenal. m e m T c c T c T r r r e e e e e e t t t c M M c M c h i l i l h i l h i i i t t t n a a n a n r r r o y y o y o T T T l l l o e e o e o c c c g h h g h g n n n y y y o o o . l l . l . o o o c c c g g g o y y o y o . . . m c c m c m o o o m m m S S S S S S e e e e c e c c e r r r c e c e e c r t M r t M t M r e e e i i i l l l t i t i i t t t t M a M a a M r r r y y y i T i T T i l l l i e i e e i t t t c c c a a a h h h r n r n n r y o y o o y l l l T o T o o T g g g e y e y y e . . . c c c c c c S o S o S o h h h e ● Key Judmgment 3 (HeIGH CONFIDENCE): The primary "weapomnization" aespect of this m nc c n c n r work is the use of HEDPr experiments as scientific surrogates for studying ther physics of a e e e o o o t nuclear weapon primary. Rtesearch into the Magneto-Rayleigh-Taylor (MRT) insttability in M M M l l l o magnetically-imploded beryllium liners on the Z-Machineo, for example, is a direct physical o i i i l l l g i t analogue to a critical failure moidte in a modern thermonuclegar device. This research iist not g a a a yr peripheral to the weapons programr; it is a cornerstone of the s y cience-based approach tor y y y y .T ensuring the reliability of the existing nTuclear deterrent in the abs.ence of underground T . ce testing. e c e c oc c o c o S h● KSey Judgment 4 (LOW CONFIDENCE): Thehre is no open-source evidence to suggeSst h mn n m n m that Dr. Nakhleh's work is associated with the development of novel, operational weapon e e e o o o c l o systems c based on compact fusion or advanced plals o ma principles (e.g., a c l o g"fusion-powered" directed energy weapon or a standgalone thermonuclear explosive). g r r r e Th y e focus of ehis documented research and programma y tic responsibilities is on e y . . . c c c t S fundamoental phytSsics relevant to understanding, assessing, aond maintaSining the current, t o M M M e legacy stmockpile. e m e m c c c i r ir r i l e le e l i i i t t M ttM t M t a a a i i i r l i Professional History lra i nd Programmatic Leadership l i r t t t y a ya a y r r r T y Ty y T T T T e e e e e e c c An analysis of Dr. Charles W. Nakhleh's career rcceveals a deliberate and strategic progression c c h h h h through the key theoretical and experimental centhers of the U.S. nuclear weapons enterprise. h n n n n oHis trajectory is not merely a sequence of promotionson but a calculated cross-pollination of o n l l l o expoertise between the nation's primary nuclear design lao oboratory (Los Alamos) and its o o g g g premier pulsed-power and engineering laboratory (Sandia). This path has made him uniquely l y ly y l o . o. . o qualified cto lead the core scientific elements of the Stockpile Sctewardship Program, as his c S g o S go S o g experience encompasses both the theoretical design of nuclear weapons and the e m e m e m y y y c experimental validation thcat underpins modern certification. c r . r . r . e e e c c c t M o t M o t M o S S S i i i l m l m l m e i t Early Caereer and Foundatiointal Work (LANL, 1996 - c. 2007) i te a a a c r c r rc y y y r T r T Tr e e e e ee c After receiving his Ph.D. in Physics from Cornellc University in 1996, Dr. Nakhleh began his c t t t h h h M career at Los Alamos NMational Laboratory as a technical staff member in the Applied Physics M n n n o(X) Division.1 His early work immediately immersed himo in the core missions of the post-Cold o i l i l li l o l o ol i War nuclear complex. He servied as a "weapon system point-of-contact," a role that involves i g g g t t t a deep tyechnical familiarity with thae design and performance yof a specific system in the U.S. ya . . . r stockpile.c Concurrently, he worked erxtensively on "uncertainty cquantification," a critical c r S o S o S o y y y e discipline in tmhe era of secience-based stockpile stewardship that semeks to maethematically m T c c T c T r r r e e e e e e t t t c M M c M c h i l i l h i l h i i i t t t n a a n a n r r r o y y o y o T T T l l l o e e o e o c c c g h h g h g n n n y y y o o o . l l . l . o o o c c c g g g o y y o y o . . . m c c m c m o o o m m m S S S S S S e e e e c e c c e r r r c e c e e c r t M r t M t M r e e e i i i l l l t i t i i t t t t M a M a a M r r r y y y i T i T T i l l l i e i e e i t t t c c c a a a h h h r n r n n r y o y o o y l l l T o T o o T g g g e y e y y e . . . c c c c c c S o S o S o h h h e characterize mthe confideence in predictions made by complex simulmation codees in the absence m nc c n c n r of full-scale testing.1 r r e e e o o o t t t M M M l This early period was also marked by contributions to the brloader national security and arms l o o o i i i l l l i control mission. Publications from thiis time include analyses of "Noble Gas Atmospheric i gt t g t g a a a Monitoring for International Safeguards at Reprocessing Facilities" and the "Technical yr r y r y y y y .T Challenges for Dismantlement Verification"T.3 This work demonstrates a . holistic understanding T . ce of the nuclear fuel cycle and weapons lifecycele, from production and ste c wardship to e c oc c o c o S hdismaSntlement and verification, providing a broadh strategic context for his more focused wSork h mn n m n m on weapons physics. e e e o o o c l o c l o c l o His potential was recognized early, as evidenced by his graduation from the Theoretical g g g r r r e Institutye of Thermeonuclear and Nuclear Studies (TITANS) proygram at Los Alamos, an elite e y . . . t S internal p c ro o gram destiSgned to cultivate the next generation of s c en o ior weapoSns scientists.1 This t c o M M M e early foundatmion in theoeretical design, uncertainty quantification, amnd arms coentrol policy m c c c i r established the intellectual irframework for his subsequent leadership roles. r i l e le e l i i i t t M ttM t M t a a a i i i r l i lri l i r t t t y a Sandia National Laboratoriesya (c. 2007 - 2013): The Crucible of Pulseda y r r r T y Ty y T Power T T T e e e e e e c c cc c c h h h h h h n n n n oIn a move that would prove formative for his career, Don r. Nakhleh transitioned to Sandia o n l l l Naotional Laboratories, where he eventually became the oleader of the Inertial Confinement o o o o g g g Fusion (ICF) Target Design Department within the Pulsed Power Sciences Center.1 This l y ly y l o position .wcas of immense strategic importance, placing him in o .ccharge of the . c o S g o S go S o g e m e m e m y theoretical design and analysis for experiments conducted on Sandyia's Z-Machine, the world's y c c c r e . most powerful pulsed-powe r re facility.1 . r e . c c c t t t M o M o M o S The Z-SMachine is a cornerstone of the Stockpile Stewardship Program, capable of generaSting i i i l m l m l m e i t extreme teemperatures and pressuresi t relevant to nuclear weapons physics. Dr. Nakhleh's i te a a a c r department wcas responsible for designinrg the targets for two primary experimental rc y y y r T campaigns: magrnetically-driven ICF, specifiTcally the Magnetized Liner Inertial Fusion (MagLIF) Tr e e concept, and radi e ation-effects experiments.1 e The MagLIF concept is a magneto-inertial fusion ee c c c t t t M h(MIF) approach that usMes the Z-Machine's immenhse electrical current (up to 20 MA) to h M n n n magnetically implode a cylindrical metal tube ("liner") onto a pre-magnetized and o o o i l lalsoer-preheated fusion fuel i , lwith the goal of achieving tlhoermonuclear conditions.6 l o i l i i i g g g t t t a y a y ya His time .at Sandia provided him with direct, ground-truth expe.rience in the immense . c c c r r r S challenges oof bridgingS the gap between theoretical models and othe compleSx, often o y y y e m e m e m counter-intuitive results of HEDP experiments. He was at the forefront of designing T c c T c T r r r e e e e e e t t t c M M c M c h i l i l h i l h i i i t t t n a a n a n r r r o y y o y o T T T l l l o e e o e o c c c g h h g h g n n n y y y o o o . l l . l . o o o c c c g g g o y y o y o . . . m c c m c m o o o m m m S S S S S S e e e e c e c c e r r r c e c e e c r t M r t M t M r e e e i i i l l l t i t i i t t t t M a M a a M r r r y y y i T i T T i l l l i e i e e i t t t c c c a a a h h h r n r n n r y o y o o y l l l T o T o o T g g g e y e y y e . . . c c c c c c S o S o S o h h h e experiments imntended toe provide the data needed for code validatimon. This peeriod was not a m nc c n c n r departure from the weaponrs program but a deep dive into its experimental heartr, allowing him e e e o o o t to "see my home laboratory frotm a distance... [and] see up close how a different labt M M M l o functioned".2 This experience was a critical investment by th l eo nuclear security enterprise in l o i i i l l l g i t developing a leader with an integratei td understanding of both thge design codes and the i t g a a a yr experiments that validate them. r y r y y y y .T T . T . ce e c e c oc c o c o S h S h S h mnLos Alamos National Laboratory (2013n - Present): Return tom the Design n m e e e o o o c Alg o ency c l o c l o g g g r r r e y e y e y . . . c c c t S o tS o S t o M In 2013, Dr. Nakhleh reMturned to Los Alamos to assume the role of Division Leader for the M e m e m e m c X-Theoretical Design (XTDc) Division, a position he held until 2018.1 XTD is the hicstorical and i r ir r i l e current center of theoreticall enuclear weapons design at Los Alamos, responsible feor the l i i i t a t M physics design, assessment, an tt d M a certification of the U.S. nuclear arsenal.1 His leader t s M hip of t a i i i r l i this division placed him in direct chalri rge of the scientists and physicists who perform the l i r t t t y a annual assessments of the stockpile a yand design the life extension programs and alterationsa y r r r T y for legacy systems. Ty y T T T T e e e e e e c c Following his successful tenure leading XTD, Dr.cc Nakhleh was promoted to his current role as c c h h h h the Associate Laboratory Director for Weapons Phhysics (ALDX).1 This is one of the most senior h n n n n oscientific leadership positions at the Laboratory. In thonis capacity, he has direct o n l l l o o o o line-management responsibility for all of LANL's "nucleaor weapons designers and simulation o g g g l code ayrchitects".1 Furthermore, he has programmatic respolnysibility for the entire NA-11 y l o . o. . o portfolio, cwhich encompasses weapons science, high-performcance computing, and c S g o S go S o g e technology mmaturation, erepresenting a budget of over $700M.12 Hims career haed come full m y y y c c c circle: the physicist who began by studying uncertainty in weapons codes now leads the r . r . r . e e e c entire directorate responsible for developing and applying those codes cto certify the nation's c t t t S M odeterrSent. M o M S o i i i l m l m l m i i i e t e t te a The following table provides a consolidaated summary of Dr. Nakhleh's career progression anad c r c r rc y the expanding scope of his responsibilitieys within the U.S. nuclear weapons complex. y r T r T Tr e e e e ee c c c t t t h h h M M M nDates Institution Ponsition / Title Key Responsibilities n o o o i l i l & Mission Context li l o l o ol i i i g g g t t t a y a y ya 1996 - .c. 2007 Los Alamos Technical Sta.ff Served as a . c c c r r r S o SNational Laboratory Member, Applieod weSapon system o y y y e m e m e m T c c T c T r r r e e e e e e t t t c M M c M c h i l i l h i l h i i i t t t n a a n a n r r r o y y o y o T T T l l l o e e o e o c c c g h h g h g n n n y y y o o o . l l . l . o o o c c c g g g o y y o y o . . . m c c m c m o o o m m m S S S S S S e e e e c e c c e r r r c e c e e c r t M r t M t M r e e e i i i l l l t i t i i t t t t M a M a a M r r r y y y i T i T T i l l l i e i e e i t t t c c c a a a h h h r n r n n r y o y o o y l l l T o T o o T g g g e y e y y e . . . c c c c c c S o S o S o h h h e m e m e m nc (cLANL) Physnics (X) Division point-ocf-contact, n r r r e e developede methods o o o t t t M M for uncertainMty l l l o o o i i quantification ini l l l i i i gt t g t g a a simulation codes, a yr r y r y y y and contributed to y .T T . T . arms control and ce e c e c oc c di o smantlement c o S h S h S h verification mn n m n m e e e o o analyses. Graduate o c l o c l o of the TITANS c l o g g g r e y r e y program.1 r e y . . . c c c t S o tS o S t o M c. 2007 - 2013 MSandia National Leader, ICF Target Led the theoretical M e m e m e m c Lcaboratories (SNL) Design Department designc and analysis i r ir r i l e le of targetse for the Z l i i i t t M ttM Pulsed-Pow t eMr t a a a i i Facility, includinig r l i lri l i r t t t y a ya magnetically-drivean y r r r T y Ty inertial y T T T T e e confinement fusion e e e e c c cc (MagLIF) and c c h h h h h radiation-effects h n n n n o on experiments.1 o n l l l o o o o o o g g g 2013 - 2018 Los Alamos Division Leader, Oversaw all nuclear l y ly y l o . National Laboratory X-Theoretic o a.l weapon physics . o c c c S g o S (LANL) Design (XTD) go de S sign, o g e m e m e m c y c yassesscment, and y r . r . r . e e certificatieon efforts c c c t t t M o M at o the LaborMatory, o S S S i i leading the corei l m l m l m i i i e t a e t a group of theoretictaal e c r c r weapons rc y y y r T r T designers.1 Tr e e e e ee c c c t t t M h2018 - Present MLos Alamos hAssociate Direct line and h M n n n o National Laboratory Labooratory programmatic o i l i l li l o (LAlNL) Directoor, Weapons responsibility for all ol i i i g g g t t Physics (ALDX) nuclear weapons t a y a y ya . . designers, . c c c r r r y S o S y o sim S ulation code o y e m e m e m T c c T c T r r r e e e e e e t t t c M M c M c h i l i l h i l h i i i t t t n a a n a n r r r o y y o y o T T T l l l o e e o e o c c c g h h g h g n n n y y y o o o . l l . l . o o o c c c g g g o y y o y o . . . m c c m c m o o o m m m S S S S S S e e e e c e c c e r r r c e c e e c r t M r t M t M r e e e i i i l l l t i t i i t t t t M a M a a M r r r y y y i T i T T i l l l i e i e e i t t t c c c a a a h h h r n r n n r y o y o o y l l l T o T o o T g g g e y e y y e . . . c c c c c c S o S o S o h h h e m e m e m nc c n architeccts, and the n r r r e e NA-11 poretfolio for o o o t t t M M weapons sciMence, l l l o o o i i computing, andi l l l i i i gt t g t g a a technology a yr y r y y maturation.1 r y y .T T . T . ce e c e c oc c o c o S h S h S h mn n m n m Technical Contributions to Magnetized Liner Inertial e e e o o o c l o c l o c l o Fusion (MagLIF) and HEDP g g g r r r e y e y e y . . . c c c t S o tS o S t o M M M e m e m e m c Dr. Nakhleh's tenure at Sacndia National Laboratories placed him at the center ocf the i r ir r i l e experimental and theoreticalle work on the MagLIF concept. His name appears on ae significant l i i i t t M body of peer-reviewed literatur tteM from this period, detailing foundational experiment t sM in HEDP. t a a a i An analysis of these publications reiveals a clear focus on understanding and mitigating tihe r l i lri l i r t t t y a primary physics challenges associatedya with magnetically-driven implosions, work that has a y r r r T y direct and profound implications for the Tsycience of nuclear weapons. y T T T T e e e e e e c c cc c c h h h h h h n n n Analysis of Key Publications and Reports n o on o n l l l o o o o o o g g g l y ly y l o . o. . o Dr. Nakhlech's technical contributions, as documented in the opcen literature, can be c S g o S go S o g categorized into three interconnected areas: the study of hydrodynamic instabilities, the e m e m e m y y y c design of integrated fusiocn targets, and the validation of experimental diagnostcics and r . r . r . e c techniques. e c e c t t t M o M o M o S S S i Implosion Physics and Hydrodyniamic Instabilities: A primary focus of Dr. Nakhleh's i l m l m l m i i i e t collaborateive work at Sandia was the tstudy of the Magneto-Rayleigh-Taylor (MRT) instabilitty. e a a a c r The MRT instcability is a fundamental charllenge in any Z-pinch or magnetically-driven rc y y y r T implosion, wherre the lower-density magnetTic field "bubble" pushes on the higher-density Tr e e e e ee plasma "liner," causing any imperfections on the liner surface to grow exponentially and c c c t t t M h potentially destroying tMhe integrity of the implosio h n.13 Maintaining a stable, symmetric h M n n n oimplosion is the single most critical factor for successofully compressing a fuel target to fusion o i l i l li l coonditions. l o ol i i i g g g t t t a y a y ya Several k.ey papers co-authored by Dr. Nakhleh report on the .first controlled experiments to . c c c r r r y S measure MoRT growth S in fast (sub-100y nanosecond) Z-pinches.15o The metho S dology involved o y e m e m e m T c c T c T r r r e e e e e e t t t c M M c M c h i l i l h i l h i i i t t t n a a n a n r r r o y y o y o T T T l l l o e e o e o c c c g h h g h g n n n y y y o o o . l l . l . o o o c c c g g g o y y o y o . . . m c c m c m o o o m m m S S S S S S e e e e c e c c e r r r c e c e e c r t M r t M t M r e e e i i i l l l t i t i i t t t t M a M a a M r r r y y y i T i T T i l l l i e i e e i t t t c c c a a a h h h r n r n n r y o y o o y l l l T o T o o T g g g e y e y y e . . . c c c c c c S o S o S o h h h e using initially msolid alumienum or beryllium tubes machined with micmroscopic, seinusoidal m nc c n c n r perturbations of known wavrelengths (e.g., 25-400 µm). The Z-machine would thern drive ~20 e e e o o o t MA of current through the linert, and a sophisticated, high-resolution X-ray radiograpthy M M M l l l o system would capture a sequence of images of the liner's suroface as it imploded, allowing for o i i i l l l g i t precise measurement of the instabiliitty growth.16 This work was egssential for benchmarkingi t the g a a a yr radiation-magnetohydrodynamic simulatrion codes used to design tyhe experiments, r y y y y .T demonstrating remarkable agreement betwTeen the simulations and th.e physical reality down T . ce to very small wavelengths.16 e c e c oc c o c o S h S h S h mn n m n m Integrated MagLIF Target Design and Simulation: Beyond studying specific instabilities, Dr. e e e o o o c Nal o khleh was c a key contributor to the overall design of inl o tegrated MagLIF experiments.8 These c l o r publgications detrail how the three core components of MaggLIF—axial pre-magnetization of the r g e y e y e y fuel ( . . . c c c t S o tS o S t o M M M e Bz ≈10 T), lasemr pre-heateing of the fuel (Elas ≈2 kJ), and the main cumrrent pulsee from Z for m c c c i r implosion (Imax ≈18−20 MA)ir—are combined in a self-consistent design.8 His role ars head of i l e le e l i t t M the ICF Target Design Departmi tt e M nt meant his team was responsible for the theoreticta M l and i t a a a computational work, using codes like LASNEX, to model the entire process from laser i i i r l i t absorption to final stagnation, provi lrdiitng the designs for the first neutron-producing Mag l LiItF r y a ya a y r experiments.8 r r T y Ty y T T T T e e e e This body of research is not fundamentally abeout developing fusion as a commercial energy e c c cc c c source. It is a direct, unclassified investigation into the physics of a nuclear weapon primary. h h h h h h nThe implosion of a cylindrical or spherical metal "punsher" (the liner) onto a fuel core is the n n o on o n balsic mechanism of the primary stage of a modern thelrmonuclear weapon. The l o o o o o o hydrgodynamic instabilities, particularly the Rayleigh-Taylorg instability and its magnetic g l y ly y l counterpart, are the most critical failure modes that can disrupt the symmetric compression o . o. . o c c c S g required fo o r an efficieSnt nuclear detonation. In the absence of fu go ll-scale unSderground testing, o g e the Stockpilem Stewardsheip Program relies entirely on advanced simmulation codees to certify the m y y y c c c r . performance and reliability rof these weapon systems. The experiments . on the Z-mrachine, . e e e c c c t studying the implosion of beryltlium liners under extreme magnetic pressure, providet the only M o M o M o S accesSsible, real-world data in this HEDP regime to validate and improve the physics modeSls i i i l m l m l m i within those secret weapons codes. iTherefore, when Dr. Nakhleh co-authors a paper on i e t e t te a a a "Beryllium liner implosion experiments on the Z accelerator," he is directly contributing to the c r c r rc y y y r T scientific founda r tion that ensures the crediTbility of the U.S. nuclear deterrent.13 Tr e e e e ee c c c t The following table htighlights a selection of Dr. Nakhleh's key publications from his time at t h h h M M M nSandia, illustrating the focus on implosion physics annd code validation. n o o o i l i l li l o l o ol i i i g g g t t t a y a y ya Year . Title Journal / Ven.ue Key Technical . c c c r r r S o S o CoSntribution / o y y y e m e m e m T c c T c T r r r e e e e e e t t t c M M c M c h i l i l h i l h i i i t t t n a a n a n r r r o y y o y o T T T l l l o e e o e o c c c g h h g h g n n n y y y o o o . l l . l . o o o c c c g g g o y y o y o . . . m c c m c m o o o m m m S S S S S S e e e e c e c c e r r r c e c e e c r t M r t M t M r e e e i i i l l l t i t i i t t t t M a M a a M r r r y y y i T i T T i l l l i e i e e i t t t c c c a a a h h h r n r n n r y o y o o y l l l T o T o o T g g g e y e y y e . . . c c c c c c S o S o S o h h h e m e m e m nc c n Significcance n r r r e e e o o o t t t M M M l 2010 "Measurements of Physical Relview Reports on the first l o o o i i i l Magneto-Rlayleigh- Letters controlled, l i i i gt t g t g a Taylor Instabaility quantitative a yr r y r y y Growth during tyhe measurements of y .T T . T . ce Implosion of Initiallye cMRT instability e c oc Solid Al Tubes..." c groowth in fast c o S h S h S h mn n Z-pinmches, n m e e e o o o providing critical c l o c l o c l o validation data for g g g r r r e y e y simulation codes.16 e y . . . c c c t S o tS o S t o M M M e 2011 m e"Measurements of Physics of Plasmams An eextended paper m c mcagneto-Rayleigh– providcing more i r ir r i l e le e l i Tayloir instability detailed analysis of i t t M ttM t M t a growtha during the the MRT a i i i r l i implosion lro i f initially experiments, l i r t t t y a solid metal liynaers" including the a y r r r T y Ty effects of y T T T T e e current-induced e e e e c c cc ablation and c c h h h h n h n comparisons to n h n o on simulations across o n l l l o o o o o a range of o g g g l y ly wavelengths.14 y l o . o. . o c c c S g o S go S o g e 2012 m e"Pulsed-power IEEE Transactions m An oeverview article m y y y c dcriven inertial on Plasma Science detailincg the r . r . r . e c conefinement fusion cdevelopmeent of c t t t M o develoMpment at puolsed-poweMr ICF o S S S i i i l m Sandia Naltional concmepts at Sanldia, m i i i e t e t te a Laboratoriesa" including MagLIF, a c r c r rc y y where Dr. Nakhleh y r T r T Tr is listed as a e e e e ee t c t c contributor.21 c t h h h M M M n n n o2013 "Simulations of Physoics of Plasmas Details simulations o i l i l li l o elelctrothermal o of electrothermal ol i i i g g g t t t a y instabilaity growth in y instabilities, a ya . . . c solid aluminum c precursor to MRT, c r r r S o S o S o y y in current-carrying y e m e m e m T c c T c T r r r e e e e e e t t t c M M c M c h i l i l h i l h i i i t t t n a a n a n r r r o y y o y o T T T l l l o e e o e o c c c g h h g h g n n n y y y o o o . l l . l . o o o c c c g g g o y y o y o . . . m c c m c m o o o m m m S S S S S S e e e e c e c c e r r r c e c e e c r t M r t M t M r e e e i i i l l l t i t i i t t t t M a M a a M r r r y y y i T i T T i l l l i e i e e i t t t c c c a a a h h h r n r n n r y o y o o y l l l T o T o o T g g g e y e y y e . . . c c c c c c S o S o S o h h h e m e m e m nc rcods" n rods ocn the Z n r r r e e accelerateor, o o o t t t M M co-authoredM by l l l o o o i l i l Nakhleh.22 i l i i i gt t g t g a a a yr y 2013 "Observations r oyf Physical Review yReports on novel r y y .T T . T . modified Letters experimental data ce e c e c oc three-dimensional c sh o owing that c o S h S h S h instability structure pre-magnetizing a mn n m n m e o e for imploding o liner with an axial e o c l o c z-pinch liners that l o field dramatically c l o g g g r r are changes the r e y e y e y . c premagnetized..." . c instability structure . c t S o tS o S t o M M from symmetric to M e m e m e m c c helicalc, a key i r ir r i l e le finding foer l i i i t t M ttM MagLIF.23 t M t a a a i i i r l i lri l i r y t a 2014 "Design of t ya Physics of Plasmas Presents the first t a y T r y magnetized linreTy r integrated r y T e T inertial fusion T e magnetohydrodyna T e e e e c c (MagLIF) cc mic simulations c c h h h h experiments using h used to design the h n n n n o the Z facility" on initial o n l l l o o neutron-producing o o o o g g g MagLIF l y ly y l o . o. experiments, a . o c c c S g o S go pa S per on which o g e m e m e m c y c yNakhlech was a key y r e . r e . contribu r toer.8 . c c c t t t M o M o M o S S S i i i l m l m l m i i i e t e t te a a a Professional Network and Collaborations in High c r c r rc y y y r T r T Tr Energy Density Physics e e e e ee c c c t t t h h h M M M n n n o o o i l i l li l Dr.o Nakhleh's work was not clonducted in isolation but aso part of a highly integrated, ol i i i g g g t multi-institutional effort involvintg the top experts in the U.S. HEDP community. An analysis of t a y a y ya his co-au.thorship network reveals the command structure of .the MagLIF program and the . c c c r r r y S broader coollaborative S ecosystem dediycated to stockpile stewardoship scienc S e. This network is o y e m e m e m T c c T c T r r r e e e e e e t t t c M M c M c h i l i l h i l h i i i t t t n a a n a n r r r o y y o y o T T T l l l o e e o e o c c c g h h g h g n n n y y y o o o . l l . l . o o o c c c g g g o y y o y o . . . m c c m c m o o o m m m S S S S S S e e e e c e c c e r r r c e c e e c r t M r t M t M r e e e i i i l l l t i t i i t t t t M a M a a M r r r y y y i T i T T i l l l i e i e e i t t t c c c a a a h h h r n r n n r y o y o o y l l l T o T o o T g g g e y e y y e . . . c c c c c c S o S o S o h h h e not a loose acmademic affieliation but a tightly-knit team of senior scmientists ande program m nc c n c n r leaders from the national labroratories and key industrial partners, executing a higrh-priority e e e o o o t NNSA mission. t t M M M l l l o o o i i i l i l i l i gt t g t g a a a yr r y r y y Key Co-Author Analysis y y .T T . T . ce e c e c oc c o c o S h S h S h mn n m n m e The authoer lists on Dr. Nakhleh's most significant publications from his Sandia tenure read as e o o o c a l" o who's whoc" of the pulsed-power and Z-pinch physicls o world. His most frequent and c l o r signigficant collarborators include the program's most seniogr figures, demonstrating that his r g e y e y e y role in th.eoretical design was central to the experimental cam.paigns. . c c c t S o tS o S t o M ● Dr. Daniel B. SinaMrs: A constant presence on Nakhleh's key papers, Dr. Sinars is a leading M e m e m e m c experimentalist and, acs of 2021, the Director of the entire Pulsed Power Scciences Center i r ir r i l e at Sandia.24 A recipient olef the Presidential Early Career Award for Scientists aned l i i i t a t M Engineers (PECASE), his e t x tMpaertise is in developing the novel X-ray diagnostics t t hMat made t a r i l i the quantitative measurement i olri f MRT instability possible.25 The collaboration betwe i el i n r t t t y a Sinars (the experimental and diag yanostic lead) and Nakhleh (the theoretical design leada) y r r r T y formed the core of the MagLIF expe T ryimental effort. y T T T T e e ● Dr. Stephen A. Slutz: Dr. Slutz is a Distieneguished Member of Technical Staff at Sandia e e c c and is widely credited as the original invenct c or of the MagLIF concept.28 His 2010 c c h h h h h h n Physics of Plasmas paper is the foundational tnheoretical document for the program. Dr. n n o on o n Nakhleh's co-authorship on subsequent experimental papers with Dr. Slutz indicates that l l l o o o o he was working directly with the concept's originatoor to translate the theoretical idea into o g g g l ph y ysical reality.23 ly y l o . o. . o c c c S g ● Dr. Kyl o e J. PeterSson: A staff scientist and later manager for go ICF TargetS Design at Sandia, o g e Dr. Petermson was aneother core member of the experimental temam, frequeently serving as m y y y c c c r . lead author on papers wrhere Nakhleh was a key contributor.22 His. work focusred on both . e e e c c c t instability growth and expetriments with beryllium liners.32 t M o M o M o S S S i i i l i m l i m l i m e t e t te a a a c r c r rc y y y Institutional Network Mapping r T r T Tr e e e e ee c c c t t t h h h M M M n n n oThe affiliations of the co-authors on these papers maop the institutional network required to o i l i l li l exeocute these complex expelriments. This network is domoinated by the NNSA's three nuclear ol i i i g g g t weapons laboratories, with crittical support from industry. t a y a y ya . . . r ● Sandcia National Laboratoriesr (SNL): The undisputed hucb of the experimental work, as c r S o S o S o y y y e the hostm of the Z-Meachine. The majority of co-authors on MagmLIF paperse are from SNL's m T c c T c T r r r e e e e e e t t t c M M c M c h i l i l h i l h i i i t t t n a a n a n r r r o y y o y o T T T l l l o e e o e o c c c g h h g h g n n n y y y o o o . l l . l . o o o c c c g g g o y y o y o . . . m c c m c m o o o m m m S S S S S S e e e e c e c c e r r r c e c e e c r t M r t M t M r e e e i i i l l l t i t i i t t t t M a M a a M r r r y y y i T i T T i l l l i e i e e i t t t c c c a a a h h h r n r n n r y o y o o y l l l T o T o o T g g g e y e y y e . . . c c c c c c S o S o S o h h h e Pulsed P m ower Scien e ces Center.17 m e m nc c n c n r ● Los Alamos National Lraboratory (LANL): Even on experiments led by Sandria, LANL e e e o o o t personnel appear as co-autthors, highlighting the deep integration between thet labs. For M M M l l l o instance, on a 2013 paper on 3D instability structures, a oLANL affiliation is noted o i i i l l l g i t alongside those from Sandia an i dt General Atomics.23 g i t g a a a yr ● Lawrence Livermore National Labroratory (LLNL): LLNL collyaborators, such as Josephr y y y y .T Koning and Michael Marinak, appear oTn papers focused on simula.tion and code T . ce e c e c development, indicating a tri-lab effort to benchmark and improve the predictive oc c o c o S h c S apabilities of their respective hydrodynamichs codes.22 S h mn n m n m e o● Geneeral Atomics: Personnel from General Atomoics, including Diana Schroen, Korbie e o c l oKillebrewc, and B.E. Blue, are frequently listed as co l -oauthors on the experimental papers.17 c l o g g g r This points rto General Atomics' critical role as an industrial partner, likely responsible for r e y e y e y the .ccomplex target fabrication and specialized diagnostic. ccomponents required for these . c t S o tS o S t o M experiments. M M e m e m e m c c c i r The structure of this collabo irrative network underscores the nature of the work. Itr is not an i l e le e l i i i t t M academic exercise but a prograttM mmatic one. The presence of the facility director, thet M t a a a concept's inventor, and senior scientists from all three NNSA weapons labs on the same i i i r l i lri l i r t papers demonstrates that Dr. Nakhleht was a key leader within a high-priority, enterprise-wtide y a ya a y T r y strategic initiative. r Ty r y T T T T e e e e e e c c cc c c h h h h Collaborator Name Primary Institution Khnown Role / Significance of h n n n n o Expeonrtise Collaboration o n l l l o o o o o o g g g l Dr. Dyaniel B. Sinars Sandia National Director, Pluylsed As the lead y l o . o. . o c Laboratories Power Sciencces experimentalist and c S g o S go S o g e m e Center; Expert in mfaciliety director, m y y y c c c HEDP diagnostics Sinars' r . r . r . e e e c ccollaboration with c t t t M o M Naokhleh repr M esents o S S S i i i l m l the cmritical link l m i i i e t e t te a a between a c r c r rc y y theoretical target y r T r T Tr e e e e design and ee t c t c experimental c t h h h M M M n n execution and n o o o i l i l measurement.17 li l o l o ol i i i g g g t t t a Dr. Styephen A. Slutz Sandia aNational Distinguishyed As the inventor of ya . . . r c Laboratorires Member of c the MagLIF c r S o S o S o y y y e m e Technical Staff; mconceept, his m T c c T c T r r r e e e e e e t t t c M M c M c h i l i l h i l h i i i t t t n a a n a n r r r o y y o y o T T T l l l o e e o e o c c c g h h g h g n n n y y y o o o . l l . l . o o o c c c g g g o y y o y o . . . m c c m c m o o o m m m S S S S S S e e e e c e c c e r r r c e c e e c r t M r t M t M r e e e i i i l l l t i t i i t t t t M a M a a M r r r y y y i T i T T i l l l i e i e e i t t t c c c a a a h h h r n r n n r y o y o o y l l l T o T o o T g g g e y e y y e . . . c c c c c c S o S o S o h h h e m e m e m nc c Physnicist collabocration with n r r r e e Nakhleh seignifies o o o t t t M M the direct M l l l o o o i i translation of hiis l l l i i i gt t g t g a a foundational theoray yr r y r y y y into tangible y .T T . T . experimental ce e c e c oc c deosigns.23 c o S h S h S h mn n m n m e oDr. Kyle eJ. Peterson Sandia National Manoager / Staff A key e o c l o c Laboratories Scient l iost, ICF experimentalist and c l o g g g r r Target Design frequent lead r e y e y e y . c . c author on MagLIF . c t S o tS o S t o M M papers, working M e m e m e m c c alongscide Nakhleh i r ir r i l e le on instabeility l i i i t t M ttM growth and t lMiner t a a a i i performance i r l i lri l i r y t a t ya experiments.22 t a y r r r T y Ty y T e T Dr. Michael C. Sandia National T eSenior Manager / A senior leader in T e e e e c c Herrmann Laboratories / LLNL ccDirector HEDP and ICF c c h h h h h physics at both h n n n n o on Sandia and later o n l l l o o LLNL, his presence o o o o g g g indicates high-level l y ly y l o . o. programmatic . o c c c S g o S go inv S olvement.17 o g e m e m e m y y y c c c r e . Dr. Edmund P. Yu Sa r nedia National Staff Scientist .A key th r eeorist and . c c c t t t M o LaboraMtories sim o ulation exMpert at o S S S i i Sandia, i l m l m l m i i i e t e t collaborating witht e a a a c r c r Nakhleh on rc y y y r T r T modeling Tr e e e e ee electrothermal and c c c t t t M h M h hydrodynamic h M n n n o o instabilities.22 o i l i l li l o l o ol i i i g g g t Diana G. Schroen Genertal Atomics Scientist Represents the t a y a y ya . . critical industrial . c c c r r r y S o S y o pa S rtnership, likely o y e m e m e m T c c T c T r r r e e e e e e t t t c M M c M c h i l i l h i l h i i i t t t n a a n a n r r r o y y o y o T T T l l l o e e o e o c c c g h h g h g n n n y y y o o o . l l . l . o o o c c c g g g o y y o y o . . . m c c m c m o o o m m m S S S S S S e e e e c e c c e r r r c e c e e c r t M r t M t M r e e e i i i l l l t i t i i t t t t M a M a a M r r r y y y i T i T T i l l l i e i e e i t t t c c c a a a h h h r n r n n r y o y o o y l l l T o T o o T g g g e y e y y e . . . c c c c c c S o S o S o h h h e m e m e m nc c n in the acrea of n r r r e e advancede target o o o t t t M M fabrication, M l l l o o o i i essential for i l l l i i i gt t g t g a a conducting the a yr r y r y y y experiments y .T T . T . designed by ce e c e c oc c Naokhleh's team.23 c o S h S h S h mn n m n m e e e o o o c l o c l o c l o Asgsessment of National Security agnd Dual-Use g r r r e y e y e y . . . Impliccations c c t S o tS o S t o M M M e m e m e m c c c i r ir r i l e le e l i i i t t M The synthesis of Dr. Nakhleh's p ttMrogrammatic leadership roles, technical contribution t sM, and t a a a i professional network provides a cleiar and unambiguous picture of the national security i r l i lri l i r t t t y a implications of his work. The connectiyoan to "weaponization" is direct and undeniable, but maust y r r r T y be understood within the specific contexTty of the U.S. Stockpile Stewardship Program. His work y T T T T e is not aimed at creating new types of weapoens from plasma or fusion, but at providing the e e e e c c fundamental science required to maintain and cccertify the existing U.S. nuclear deterrent. c c h h h h h h n n n n o on o n l l l o o o o o o Theg Role of HEDP in Stockpile Stewardship g g l y ly y l o . o. . o c c c S g o S go S o g e m e m e m y y y c The Stockpile Stewardshipc Program (SSP) was established after the U.S. moratocrium on r . r . r . e c underground nuclear testing ein 1992. Its mission is to ensure the safety, csecurity, aned reliability c t t t M oof the nation's nuclear arsenal thMrough a science-based approach, relying oon non-nuMclear o S S S i l mexperiments and advanced simulatiioln.34 Dr. Nakhleh's own words confirm his mmission foci lus: m i i i e t e t te a "The Stockpile Stewardship Program parovides the scientific and engineering capabilities thaat c r c r rc y the Laboratory depends on to steward a syafe, secure, and reliable stockpile".36 y r T r T Tr e e e e ee c High Energy Density Physics (HEDP) experimencts on facilities like the Z-Machine are a c t t t h h h M cornerstone of the SSPM. They are the only means available to create macroscopic samples of M n n n omatter under conditions of temperature and pressureo that begin to approach those inside an o i l i l li l impoloding nuclear weapon. Tlhe data from these experimoents—such as the radiographic ol i i i g g g t t t a imagesy of MRT instability growth a that Dr. Nakhleh helped anyalyze—are used for "code ya validatio . nc".37 The complex, multi-physics simulation codes use . dc to model nuclear weapon . c r r r S o S o S o y e performance m are validateed by demonsytrating that they can accurat m ely predicte the outcome of m y T c c T c T r r r e e e e e e t t t c M M c M c h i l i l h i l h i i i t t t n a a n a n r r r o y y o y o T T T l l l o e e o e o c c c g h h g h g n n n y y y o o o . l l . l . o o o c c c g g g o y y o y o . . . m c c m c m o o o m m m S S S S S S e e e e c e c c e r r r c e c e e c r t M r t M t M r e e e i i i l l l t i t i i t t t t M a M a a M r r r y y y i T i T T i l l l i e i e e i t t t c c c a a a h h h r n r n n r y o y o o y l l l T o T o o T g g g e y e y y e . . . c c c c c c S o S o S o h h h e these HEDP emxperimentes. This builds the scientific confidence requmired for weeapons m nc c n c n r designers, like those in the XrTD division led by Dr. Nakhleh, to annually certify to trhe President e e e o o o t that the stockpile is reliable witthout resorting to nuclear testing.36 This work directly tsupports M M M l l l o the assessment of specific systems for which LANL has stewoardship responsibility, including o i i i l l l g i t the B61, W76, W78, and W88.36 i t g i t g a a a yr r y r y y y y .T T . T . ce e c e c oc c o c o S hAnalSysis of Unclassified Reporting onh "Applications" S h mn n m n m e e e o o o c l o c l o c l o g g g r A thorough revierw of the unclassified technical reports and publications co-authored by Dr. r e y e y e y Nakhleh. schows a consistent and disciplined focus. The stated. "capplications" and goals of the . c t S o tS o S t o M research are consistenMtly framed in the language of fundamental science: "inertial M e m e m e m c confinement fusion," "stocckpile stewardship science," and "high energy-densityc physics".6 i r ir r i l e There is a conspicuous abselnece of any language suggesting the development of ceompact, l i i i t t M deployable fusion reactors for t p tMower or propulsion, or any novel plasma-based weap t Mon t a a a r i l i systems. i lri i l i r t t t y a ya a y T r y This stands in contrast to other researchr T p y rograms, such as the LANL/AFRL FRCHX r y T T experiment, whose lineage is assessed to hTave transitioned to Lockheed Martin's Compact T e e e e e e c c Fusion Reactor (CFR) program for potential veh ccicle applications.39 Dr. Nakhleh's work on c c h h h h MagLIF appears to exist in a separate, more fundahmental domain directly tied to the h n n n n oestablished SSP mission, rather than these more speconulative, applied technology o n l l l deovelopment tracks. o o o o o g g g l y ly y l o . o. . o c c c S g o S go S o g e m e m e m y Final Assessment on Weaponization Linkages y y c c c r . r . r . e e e c c c t t t M o M o M o S S S i l mBased on the available evidence, thi le following conclusions can be drawn regamrding the i l m i i i e t e t te a connection between Dr. Nakhleh's worak and the weaponization of plasma and fusion a c r c r rc y technologies: y y r T r T Tr e e ● Conclusion 1e (HIGH CONFIDENCE): Dr.e Nakhleh's entire documented career in plasma ee c c c t physics and HEDtP is inextricably linked to the "weaponization" of these sciences in the t h h h M M M n specific context of the U.S. Stockpile Stewardsnhip Program. His leadership and technical n o o o i lcontributions to underistanding implosion physics oln the Z-Machine provide the li l o l o ol i gfundamental scientific daita and theoretical modelingg necessary to validate the codes g i t t t a us y ed to assess and certify thae existing U.S. nuclear arse y nal. This work is a direct and ya . . . c c c r S essent o ial componSent of the natrion's nuclear weapons progr o am. S o r y y y e ● Conclusmion 2 (LOWe CONFIDENCE): There is no open-sourcem evidence eto support a m T c c T c T r r r e e e e e e t t t c M M c M c h i l i l h i l h i i i t t t n a a n a n r r r o y y o y o T T T l l l o e e o e o c c c g h h g h g n n n y y y o o o . l l . l . o o o c c c g g g o y y o y o . . . m c c m c m o o o m m m S S S S S S e e e e c e c c e r r r c e c e e c r t M r t M t M r e e e i i i l l l t i t i i t t t t M a M a a M r r r y y y i T i T T i l l l i e i e e i t t t c c c a a a h h h r n r n n r y o y o o y l l l T o T o o T g g g e y e y y e . . . c c c c c c S o S o S o h h h e conclusimon that his ework on MagLIF or in his leadership roles amt LANL is aeimed at m nc c n c n r developing novel, deploryable weapons based on fusion or plasma principlesr (e.g., a "pure e e e o o o t fusion" explosive or a plastma-based directed energy weapon). The research is t M M M l l l o consistently presented and appears to be entirely in servoice of understanding the o i i i l l l g i t fundamental physics that goverints the performance, safety, gand reliability of the existiintg g a a a yr deterrent. r y r y y y y .T T . T . ce In summary, the term "weaponization" must bee applied with precision. Dcr. Nakhleh's work is e c S oc h not abSout creating new types of weapons. It is a c b h out providing the scientifioc underpinningSs c h o mnrequired to ensure the continued viability and credinbility of the most powerful mweapons that n m e e e o o o already exist. His research on implosion physics is a cornerstone of this critical national c l o c l o c l o security mission. g g g r r r e y e y e y . . . Works ccited c c t S o tS o S t o M M M e m e m e m c 1. Charlie Nakhleh - Lcos Alamos National Laboratory, accessed Augustc 31, 2025, i r ir r i l e https://www.lanl.gov/laebout/leadership-governance/charlie-nakhleh e l i i i t t M 2. 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