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Message ID: 645     Entry time: Friday, March 09, 2018, 08:57
Author: Carla Babcock 
Target/No.#:  
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Target Oven W.O#:  
Heat Shield W.O#:  
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Subject: HV test with electronics moved to rack 

First attachment: BIAS/EE/EZL = 63.25/-1.5/31 So far no issues.

Second attachment: BIAS/EE/EZL = 64.25/-1.5/32 Slight spark - bias current jumped from 40uA to 88uA and vacuum jumped from 2e-7 to 2e-6... Steerers went off.

Third attachment: BIAS/EE/EZL = 65/-1.5/32  Some small signs of instability in the bias power supply

Fourth attachment :  BIAS/EE/EZL = 65/-1.5/32  Been running for 20 mins now. More variation on the bias current output than at lower voltages but not too bad

Attachment 1: 09032018_830.PNG  29 kB  | Show | Show all
Attachment 2: 09032018_835.PNG  26 kB  | Show | Show all
Attachment 3: 09032018_850.PNG  26 kB  | Show | Show all
Attachment 4: 09032018_855.PNG  26 kB  | Show | Show all
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