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Message ID: 1021     Entry time: Tuesday, September 10, 2024, 16:24
Author: Dave Neilson 
Target/No.#: TiC #24D 
Source: HP-SIS 
Station: ITW 
Module: TM3 
Target Oven W.O#: 45447-27 
Heat Shield W.O#: 45235-25 
Status:  
Subject: Back up target testing and conditioning 

Tuesday, September 10, 2024, 16:21:   Target installed in test stand by Brady

Tuesday, September 10, 2024, 16:21: roughed down and turbo pumps now on.

Tuesday, September 10, 2024, 20:27   Pressure at 4.9e-6, increasing TGHT TBHT to 580A/230A at 1A/30s

Wednesday, September 11, 2024, 10:00 The TGHT TBHT parameters were mistakenly reversed during heating. TBHT was dropped to 230A and TGHT increased to 580A at 1A/30s.

Wednesday, September 11, 2024, 13:50 TGHT TBHT at 580 230.  Increasing BIAS/EE/EZL to 30/2.5/13 kV.

Wednesday, September 11, 2024, 14:36 At high voltage, on FC0 there is an output beam current of 1.85e-7 A.

Wednesday, September 11, 2024, 14:49 Mass scan recorded.   2024-09-11 HPTiC-24D - scan 1.txt ... FC6 problem with recording background level data persists

Wednesday, September 11, 2024, 15:53  increasing BIAS and EZL to condition high voltage 

Wednesday, September 11, 2024, 16:32 at 37kV (EZL 22kV), TGHT timed out and cut the current to the target. I elected to leave it cold rather than suddenly reheating it, and am cooling down TBHT at -1A/30s, while continuing to increase BIAS for conditioning.

there have been no sparks at all and I'm unsure of what precipitated this event. None of the 'trip indicators' on the TGHT panel lit up during this event. I will bring this up with Keiko/Roberto tomorrow Sept 12.

 

Wednesday, September 11, 2024, 17:06  one spark occurred at 49kV

 Wednesday, September 11, 2024, 17:15  now at 50kV, EZL at 33kV.  Over 30 minutes there was just one spark at the HV bias.

Wednesday, September 11, 2024, 17:50  decreasing high voltage elements to 0 0 0. 

Attachment 1: 2024-09-11_HPTiC-24D_target_characterization.docx  130 kB  Uploaded Friday, September 13, 2024, 17:16
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