May 28, 2013 Solenoid Meeting

Tuesday May 28,2013 at 11am At Jefferson Lab, the meeting will be held in room ARC 231

Agenda

• Discussion on Quench Details
  • Probir/Renuka analysis Media:Quench Analysis.pdf___ Media:Quench Comparisons.pdf
  • George's info Media:Quench plot zoom.png____ Media:Quench plot.png
• Plans for low current testing
• Work accomplished since Quench
  • Power Supply ramp smoothing program
  • Power Supply resolution hardware fix (0-1.5 A/sec)
  • Voltage tap checks/fixes
  • Short to ground location
  • Power Supply hose replacement
• Plans for low current testing
  • 15A Commissioning Plan Media:15A Plan.pdf
  • 140A Commissioning plan
• Cool Down Plans
• Path Forward .......

Useful Info

• Documents available at M:\halld_engineering\Solenoid\Commissioning\Response to Quench

Meeting Minutes

Probir and Renuka discussed/presented their findings on the quench analysis and comparison to the LASS configuration. Based on this analysis there should have been a minimum of 1K margin on the superconductors for all coils. After much discussion there was speculation that the superconductors have local areas that are not as good as the short samples tested at SLAC. Still no consensus on the cause of the quench.