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Message ID: 701     Entry time: Monday, December 17, 2018, 12:03
Author: Aaron Schmidt 
Target/No.#:  
Source: LP-FEBIAD 
Station:  
Module:  
Target Oven W.O#: 395530-3 
Heat Shield W.O#: 42752-5 
Status:  
Subject: Anode leak current check. 

Monday, December 17, 2018, 12:01: Connected Multimeter through feedthroughs J & L. Blue wire removed.

To run TGHT, TBHT, Anode ONLY. HV will remain locked with yellow tape over the keyhole. Currently locked out.


Tuesday, December 18, 2018, 08:37: Power / sources on

TGHT, TBHT, Anode, Coil on. NO HV.

Tuesday, December 18, 2018, 08:40: Turn off. Anode reading before PS on?

We found a steady climb on the Anode current via the epics controls, however no reading turned up on the multimeter. Disappears once the Anode PS is switched on.

Tuesday, December 18, 2018, 08:46: Power / sources on

TGHT, TBHT, Anode, Coil on. NO HV.

Tuesday, December 18, 2018, 08:49: Auto-ramping TGHT to 580 A @ 2 A per min.

Tuesday, December 18, 2018, 08:50: Anode set to 300 V.

 FM Tuesday, December 18, 2018, 13:42: TGHT @ 580 A Anode@300 V. Epics and the power supply shows ~20 mA. However the multimeter doesn't show any reading.

FM Tuesday, December 18, 2018, 14:25: Strange behavior noted on EE while doing the anode voltage scan. Screenshot added to the word document.

FM Tuesday, December 18, 2018, 14:25: Auto-ramping TBHT to 100 A @ 2 A per min

FM Tuesday, December 18, 2018, 15:40: Auto-ramping TBHT to 150 A @ 2 A per min

FM Tuesday, December 18, 2018, 16:26: Auto-ramping TBHT to 200 A @ 2 A per min

FM Tuesday, December 18, 2018, 17:08: Auto-ramping TBHT to 250 A @ 2 A per min

FM Tuesday, December 18, 2018, 17:38: Auto-ramping TBHT to 300 A @ 2 A per min

FM Tuesday, December 18, 2018, 17:20: Auto-ramping TBHT to 250 A @ 2 A per min

FM Tuesday, December 18, 2018, 18:37 : Nothing register on the multimeter, maybe we need to connect between A-B, or B-F. Cooling down to inspect the multimeter connection tomorrow.

FM Tuesday, December 18, 2018, 18:37: Auto-cooling TBHT/TGHT@ 2 A per min


FM Wednesday, December 19, 2018, 09:29: For the lasts 10 hours, the anode drain current has shown a steady value of 10.989 mA even though both the TBHT and the TGHT are off.

FM Wednesday, December 19, 2018, 10:47: Power supplies turned off in EPICS, Anode drain current still shows 4.839 on the readback.

Wednesday, December 19, 2018, 14:25: Power / Sources on. Anode to 300 V. - AS

Wednesday, December 19, 2018, 14:26: Auto-ramping TGHT to 300 A @ 2 A per min. - AS


Thursday, December 20, 2018, 06:42: Auto-ramping TGHT to 580 A @ 2 A per min. - AS

FM Thursday, December 20, 2018, 11:12 : Auto-ramping TBHT to 200 A @ 2 A/min

Thursday, December 20, 2018, 13:05 (Roughly) Power bump due to winds. Full TS shutdown.

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