SPHEX
ENTITY dossier

SPHEX

SPHEX

ENTITY Spherical Tokamak INTERNATIONAL

01 Executive_Summary

UK spheromak device at universities (Imperial/York), demonstrated steady-state current drive via helicity injection.

03 Deep_Dive_Intelligence

Intelligence Summary: SPHEX

Node Identity: SPHEX is a entity categorized under "Spherical Tokamak" in the uk intelligence graph. UK spheromak device at universities (Imperial/York), demonstrated steady-state current drive via helicity injection.

Research Evidence: The following findings from 2 research documents reference this entity:

  1. UK Spheromak/Compact Toroid Heritage: The UK has a significant historical research program in compact toroid concepts: - SPHEX Spheromak: Operated at UK universities (primarily Imperial College/York), SPHEX was a spheromak device using a magnetized Marshall gun for plasma formation and sustainment via helicity injection.
  2. SPHEX research contributed to understanding of spheromak sustainment physics.
  3. The SPHEX group developed an understanding of the dynamo in sustained spheromaks" (https://www.osti.gov/biblio/304511) - IOPscience (RFP UK): "The foundations of present-day RFP research are to be found in the early results from ZETA in 1967...
  4. HICD has successfully formed and sustained current in the CTX [Jarboe (1983)] and SPHEX [Browning (1992)] spheromaks and in the CDX [Ono (1987)], CCT [Darrow (1990], and HIT [Nelson (1994)] tokamaks.

Strategic Relevance: SPHEX is a tracked entity within the uk network. With 1 documented connection to other entities, this node plays a supporting role in the network topology.

Network Linkage: This entity maintains 1 documented connections in the intelligence network: SPHEX located at Culham/CCFE.

Source Documents: Evidence compiled from: FINDINGS_FROM_research-prompts-round72.md, GeneralAtomics DIII-D FiveYearPlan 1998.

04 Network_Linkage

This entity maintains 1 documented connections in the intelligence network: SPHEX located at Culham/CCFE.

05b Related_Topics (1)

Field-Reversed Configuration
usa → russia → china → japan → israel →

07 Key_Findings

  • ▸ **UK Spheromak/Compact Toroid Heritage:** The UK has a significant historical research program in compact toroid concepts: - **SPHEX Spheromak:** Operated at UK universities (primarily Imperial College/York), SPHEX was a spheromak device using a magnetized Marshall gun for plasma formation and sustainment via helicity injection.
  • ▸ UK spheromak device at universities (Imperial/York), demonstrated steady-state current drive via helicity injection.
  • ▸ **Research Evidence:** The following findings from 2 research documents reference this entity: 1.

10 FAQ

What is SPHEX? ▾
Identity: SPHEX is a entity categorized under "Spherical Tokamak" in the uk intelligence graph. UK spheromak device at universities (Imperial/York), demonstrated steady-state current drive via helicity injection.
What role does SPHEX play in the research network? ▾
SPHEX is classified under the "Spherical Tokamak" category, belonging to the INTERNATIONAL vertical group. This entity maintains 1 documented connections in the intelligence network: **SPHEX** located at **Culham/CCFE**.
What evidence supports the SPHEX assessment? ▾
The intelligence assessment for SPHEX is supported by 3 primary sources and 2 citations. Key sources include "The Spheromak path to fusion energy - OSTI.gov (LLNL Technical Report)", "The design and operation of the SPHEX spheromak - Plasma Physics and Controlled Fusion (IOPscience)", and "The internal magnetic structure and current drive in the SPHEX spheromak - IOPscience". These documents provide the evidentiary basis for the analysis.
What is known about SPHEX? ▾
Identity: SPHEX is a entity categorized under "Spherical Tokamak" in the uk intelligence graph. UK spheromak device at universities (Imperial/York), demonstrated steady-state current drive via helicity injection.
What is SPHEX's role in the network? ▾
This entity maintains 1 documented connections in the intelligence network: SPHEX located at Culham/CCFE.
How does SPHEX fit into the broader intelligence network? ▾
This entity maintains 1 documented connections in the intelligence network: SPHEX located at Culham/CCFE.
What external sources document SPHEX? ▾
SPHEX is documented by 3 external sources, including 1 Government technical report and 2 Journal article. Notable references include "The Spheromak path to fusion energy - OSTI.gov (LLNL Technical Report)", "The design and operation of the SPHEX spheromak - Plasma Physics and Controlled Fusion (IOPscience)", and "The internal magnetic structure and current drive in the SPHEX spheromak - IOPscience".
What is the historical timeline for SPHEX? ▾
SPHEX is referenced across documents spanning 1967–1994, with activity noted in 1967, 1983, and 1987. This temporal range is derived from the primary source documents in the research archive.
How does SPHEX relate to compact fusion research? ▾
Intelligence Summary: SPHEX Node Identity: SPHEX is a entity categorized under "Spherical Tokamak" in the uk intelligence graph. UK spheromak device at universities (Imperial/York), demonstrated steady-state current drive via helicity injection. Research Evidence: The following findings from 2...
What documents should I read to learn more about SPHEX? ▾
To learn more about SPHEX, review the 3 primary sources, and related research finding linked in the source documents section of this dossier.

Citations 2

  1. [1]
  2. [2]

Verified_Primary_Sources 3 SOURCES

primary www.osti.gov Government technical report
The Spheromak path to fusion energy - OSTI.gov (LLNL Technical Report)
Verifies: SPHEX group developed understanding of the dynamo in sustained spheromaks; Sustainment of spheromak by helicity injection demonstrated in SPHEX at U. Manchester; SPHEX was a relatively cold device compared to CTX; Spheromak physics studied in US, Japan, and UK in 1980s-1990s
External Link ↗
primary iopscience.iop.org Journal article
The design and operation of the SPHEX spheromak - Plasma Physics and Controlled Fusion (IOPscience)
Verifies: SPHEX spheromak plasma formed by ejection from a magnetized Marshall gun; Plasma sustained as long as gun is energized; Toroidal current driven by mechanism associated with coherent n=1 oscillation; Current amplification factor approximately five times the gun solenoid flux
External Link ↗
primary iopscience.iop.org Journal article
The internal magnetic structure and current drive in the SPHEX spheromak - IOPscience
Verifies: Steady-state current drive by helicity injection demonstrated in SPHEX spheromak; Current drive process closely associated with n=1 fluctuations; n=1 mode responsible for current drive confirmed definitively; Force-free equilibria fitted to magnetic field data from insertable probe
External Link ↗
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ID: SPHEX
Type: entity
Region: uk
Last updated: Research database snapshot