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ESS Cryomodule Testing Meeting

Europe/Stockholm
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1. CM13 is arrived to FREIA on April, 21st. Reception test is done (Ok).  The flange (ring) between CM and cryo-jumper was re-machined to 1 mm in radius to be able to fit, it is from the accessories box for CM13 (This should be written as non-conformity to report). The RF stations are restarted. The stepper motor test at warm was done (Ok).  Currently the pumping of beam vacuum line is ongoing.  The plan is to start warm coupler conditioning on Friday and continue in auto mode during long weekend. 

2. The point from Paolo – CTSs are modified in this CM, then is in previous CMs, to aware that the temperatures behaviors can be unusual compared from another CMs. The copper collars were removed, temperature sensors placed on stepper motor wires.  It was mentioned that in CM02 the CTS was blocked because CTS was moved beyond limit switch (found when the CM was opened in ESS with team from IJCLab). FREIA team doesn’t find any features of CTSs during the operation that can explained this, there were no issues during CTS operation in FREIA for CM02 2nd test.

3. Visits of Akira, Cecilia and Nuno during CM13 testing:  Akira will be in Uppsala from May 2nd to May 10th. For Cecilia is valuable to be present in FREIA during first power sending to cavities, that according to FREIA plan will be around May, 8-9 (W19). To test cryogenic behavior Nuno asked to extend cold part of the test to W20, as he is not available on W19. W20 will be short (May 18-19 is off in Uppsala University).

4.The prediction for CM14 arrival to FREIA is changed to middle of October. 

5. The installation in ESS is ongoing and the help of FREIA personal endorses. There are several tasks that related to RF power stations, CTS torque measurement in a tunnel point, debugging of spoke coupler conditioning algorithm, spoke low power testing with VNA, ESS EPIC environment testing and etc. - Need to be defined more specifically.

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