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LH Experiment Summary 1060406. Run 1060406 Goals: Test protection system- RINT/FINT ratios Increase LH power and duration Look for evidence of current drive. Run 1060406 Results:

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Lh experiment summary 1060406
LH Experiment Summary 1060406

  • Run 1060406 Goals:

  • Test protection system- RINT/FINT ratios

  • Increase LH power and duration

  • Look for evidence of current drive

  • Run 1060406 Results:

  • Bugs were found with the protection system, requiring lengthy cell accesses. The protection system worked some of the time, the reasons for failure were found and the method seems promising for arc protection.

  • Coupling study was continued with remaining 3 shots. Pushed in to a position ~1mm behind limiter and observed better coupling.


Run summary for 1060413
Run Summary for 1060413

  • Run 1060413 Goals:

  • Test protection system, and restrike

  • Increase LH power and duration

  • Look for evidence of current drive

  • Started of with 5 ms pulses to check protection system

  • First fault due to body current at 80kW/klystron.

  • Backed power down to 70 kW/klystron, protection system worked so the pulse length was extended. Increased duration until a slow periodic structure was observed on the reflected power.

  • The oscillation was intermittent, but at levels high enough to cause a trip if we had protection on the jungle gym. Lowered power and used ramps.



Periodic oscillation
Periodic Oscillation

Signals show 60Hz oscillation.


Highest power to date
Highest Power to Date

370kW/840kW

Coupled for 40 ms