glossary:tilt-mode
CONCEPT dossier
Tilt Mode
Glossary term: Tilt Mode
CONCEPT Fusion Physics
01 Executive_Summary
An FRC instability in which the plasma torus tilts and destroys confinement. Understanding and suppressing the tilt mode was essential to making FRCs viable.
02 Definition
An FRC instability in which the plasma torus tilts and destroys confinement. Understanding and suppressing the tilt mode was essential to making FRCs viable.
Related terms: FRC
03 Deep_Dive_Intelligence
Overview
An FRC instability in which the plasma torus tilts and destroys confinement. Understanding and suppressing the tilt mode was essential to making FRCs viable.
Role: Glossary term: Tilt Mode
Entity Type: Concept — Tilt Mode is a technical concept or theoretical framework.
Technical Definition
An FRC instability in which the plasma torus tilts and destroys confinement. Understanding and suppressing the tilt mode was essential to making FRCs viable.
Related Concepts: FRC
05b Related_Topics (1)
07 Key_Findings
- ▸ Entity Type: Concept — Tilt Mode is a technical concept or theoretical framework.
09 Timeline_Mentions (2)
1987
LLNL FRC tilt-mode simulation
LLNL simulations of the FRC tilt-mode instability, a key stability challenge.
fusion-research 1987
QN3D Hybrid PIC Code Development
E.J. Horowitz and D.E. Shumaker present QN3D, a 3-D hybrid particle-in-cell code designed to model the tilt mode instability in FRCs.
fusion-physics10 FAQ
What is Tilt Mode? ▾
An FRC instability in which the plasma torus tilts and destroys confinement. Understanding and suppressing the tilt mode was essential to making FRCs viable.
What role does Tilt Mode play in the research network? ▾
Tilt Mode is classified under the "Fusion Physics" category, serving as Glossary term: Tilt Mode. An FRC instability in which the plasma torus tilts and destroys confinement. Understanding and suppressing the tilt mode was essential to making FRCs viable.
What evidence supports the Tilt Mode assessment? ▾
The intelligence assessment for Tilt Mode is supported by 4 primary sources. Key sources include "Numerical study of tilt stability of prolate field-reversed configurations", "Kinetic Effects on the Stability Properties of Field-reversed Configurations: II. Nonlinear Evolution", and "Tilt mode stability scaling in field-reversed configurations with finite Larmor radius effect". These documents provide the evidentiary basis for the analysis.
What is the technical definition of Tilt Mode? ▾
An FRC instability in which the plasma torus tilts and destroys confinement. Understanding and suppressing the tilt mode was essential to making FRCs viable. Related Concepts: FRC
What is the physics behind Tilt Mode? ▾
An FRC instability in which the plasma torus tilts and destroys confinement. Understanding and suppressing the tilt mode was essential to making FRCs viable. Role: Glossary term: Tilt Mode Entity Type: Concept — Tilt Mode is a technical concept or theoretical framework.
What external sources document Tilt Mode? ▾
Tilt Mode is documented by 4 external sources, including 2 Technical Report (OSTI), 1 Journal Article (OSTI), and 1 Journal Article (IOPscience). Notable references include "Numerical study of tilt stability of prolate field-reversed configurations", "Kinetic Effects on the Stability Properties of Field-reversed Configurations: II. Nonlinear Evolution", and "Tilt mode stability scaling in field-reversed configurations with finite Larmor radius effect".
How was information about Tilt Mode collected? ▾
Information about Tilt Mode was collected through open-source intelligence (OSINT) methods, analyzing 4 declassified documents and cross-referencing findings across the research network.
What is the current status of Tilt Mode? ▾
An FRC instability in which the plasma torus tilts and destroys confinement. Understanding and suppressing the tilt mode was essential to making FRCs viable.
How does Tilt Mode relate to compact fusion research? ▾
Overview An FRC instability in which the plasma torus tilts and destroys confinement. Understanding and suppressing the tilt mode was essential to making FRCs viable. Role: Glossary term: Tilt Mode Entity Type: Concept — Tilt Mode is a technical concept or theoretical framework. Technical...
What documents should I read to learn more about Tilt Mode? ▾
To learn more about Tilt Mode, review the 4 primary sources, and related research finding linked in the source documents section of this dossier.
External_References 5 REFS
/pdfs/2020INFUSE_Workshop_LANL_Wurden.pdf#page=4
ref
/pdfs/2020INFUSE_Workshop_LANL_Wurden.pdf#page=5
ref
/pdfs/6.5_T.Matsumoto_CT2016.pdf#page=1
ref
/pdfs/6.5_T.Matsumoto_CT2016.pdf#page=4
ref
/pdfs/6.5_T.Matsumoto_CT2016.pdf#page=5
ref
Glossary_Sources
Verified_Primary_Sources 4 SOURCES
primary osti.gov Technical Report (OSTI)
Numerical study of tilt stability of prolate field-reversed configurations
Verifies: Tilt mode is n=1 internal instability in FRCs; Sheared rotation reduces tilt mode growth rate; Finite ion Larmor radius effects reduce but do not eliminate tilt mode growth
External Link ↗
primary osti.gov Technical Report (OSTI)
Kinetic Effects on the Stability Properties of Field-reversed Configurations: II. Nonlinear Evolution
Verifies: n=1 tilt mode is most dangerous MHD instability in FRCs; Low-s-bar simulations show nonlinear saturation of tilt mode; Large ion orbits provide kinetic stabilization
External Link ↗
primary osti.gov Journal Article (OSTI)
Tilt mode stability scaling in field-reversed configurations with finite Larmor radius effect
Verifies: Tilt mode marginal stability depends on FLR effects and MHD potential energy; Stability prediction depends on S* (macroscale parameter) and E (elongation); Most long-lived stable FRC experiments lie in region predicted unstable by FLR theory
External Link ↗
primary iopscience.iop.org Journal Article (IOPscience)
MHD simulation of tilt instability during the dynamic FRC magnetic compression process
Verifies: Tilt mode induces significant deformations and complete confinement loss; Tilt instability initially identified through analytical studies on spheromak; Toroidal flow can reduce growth rate and nonlinear saturation amplitude
External Link ↗
ID: glossary:tilt-mode
Type: concept
Region: glossary
Last updated: Research database snapshot
Type: concept
Region: glossary
Last updated: Research database snapshot