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Message ID: 550     Entry time: Tuesday, November 19, 2013, 16:55
Author: Bevan Moss 
Category: Conditioning Station 
Type: Standard Operation 
Module: TM2 
Target/Number:  
Subject: HV conditioning 

 HV conditioning of TM2 continued today. At ~53.5kV the module started to spark externally to the HV cover. This is the first time the cover has been tested to this high of a voltage due to the limitations of the modules. As such for the conditioning station to achieve 60kV while keeping the target hall open of personnel the cover and cage will need to be modified. To continue with HV testing of TM2 the cover was removed and the target hall locked out as per the procedure covered in Document 70039 "ISAC Conditioning Station: First Lock-Out and High-Voltage "ON". With the cover off the module was able to achieve ~56.7kV without the Einzel lens on. Eliminate the Einzel lens as a potential source of sparking it was brought to 25kV while the module continued conditioning. Maximum voltage achieve under this configuration was 57.1kV. Increments are now 50V steps. The Canbus continues to be very sensitive to any sparking and is slowing the process down considerably. It does however appear that the module is continuing to condition. I will continue tomorrow after the module moves to attempt to reach 60kV and hold it for 1 hour.

Attachment 1: external_sparking.JPG  109 kB  | Show | Hide all
Attachment 2: 19112013_HV_conditioning_TM2.JPG  195 kB  | Show | Hide all
Attachment 3: 19112013_TM2_No_source_tray_HV_Test_no_cover.txt  2.337 MB  | Show | Hide all
Attachment 4: 19112013_TM2_No_source_tray_HV_Test.txt  779 kB  | Show | Hide all
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