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ESS Cryomodule meeting

Europe/Stockholm
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  • CM14 is at 2 K. Heat load measurements are ongoing. 
  • The warm up is planned to Friday, April 5th. 
  • The second FPC conditioning is done before cooling down (as CM was disconnected and was in a static vacuum during CTSs changing. 
  • The results for F vs T and F vs P is good. 
  • The CTSs also passed the test. 
  • 12 MV/m was reached with both cavities without FE.
  • There is a possible leak from thermal shield to insulation vacuum. It can be a bad connection of cryolines in jumper, or some other more serious issue, that FREIA team will not be able to solve. So after discussion the next strategy was chosen: disconnect CM14 in FREIA as was planned and send it to ESS. ESS team will proceed the incoming test that include leak check between thermal shield and insulation vacuum. 
  • The aim of sending CM14 to ESS on Aplril 11, Thursday. 
  • The strategy for retest of a vented CM02 was shortly discussed. The aim is to retest it in FREIA before summer. The more detail test plan will be discussed after agreement of the heads.

 

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