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Message ID: 546     Entry time: Thursday, April 08, 2021, 08:25
Author: Aaron Schmidt 
Target Material: Ta 
Target Oven W.O#: 44139-10 
Source: LP-SIS 
Status: In progress 
Subject: Conditioning Ta#62 & Flex - line HS installed 

 Ta#62 LP-SIS target description:

Total Ta foils = 470 [6x20 packs + 350 single discs]

Foil Thickness = 0.025mm

Target density = 13.96 g/cm3

Target length = 3.4 cm

Total Mass = 47.461 g [Incl foils + Ta wire on 6 packs]

Total mass w/ Target oven= 445 g (w/ end caps)

Discs in target are arranged as follows: 1pack / 75 singles / 1pack / 100 singles / 2packs / 100 singles / 1pack / 75 singles / 1pack

End caps installed (expanded). No Ta foil heat shield added


TBHT will be ramped up to 230A 

TGHT will be ramped up to 600A +

Final desired temperature = 1900C.

OMEGA slope = 0.98.

Thursday, April 08, 2021, 08:24: Roughing.

Thursday, April 08, 2021, 09:06: Vent & check. Roughed to only 20 T. 

Thursday, April 08, 2021, 09:18: Roughing. Loose flange found. Left side wall / upper right. 

Thursday, April 08, 2021, 09:34: TP1 on. 

Thursday, April 08, 2021, 14:41: Vacuum @ 1.65e-06T. Waterline opened.

Thursday, April 08, 2021, 14:46: Vacuum ok. Power on. TGHT / TBHT to 20 / 15 A. Ok.

Thursday, April 08, 2021, 14:50: Auto-ramping TGHT / TBHT to 300 / 100 A @ 2 A per min.


Friday, April 09, 2021, 05:08: Vacuum @ 6.23e-07T. Temp @ 1195 C. Auto-ramping TGHT / TBHT to 400 / 150 A @ 2 A per min.

Friday, April 09, 2021, 06:01: Vacuum @ 9.64e-07T. Temp @ 1447 C. Auto-ramping TGHT / TBHT to 500 / 200 A @ 2 A per min.

Friday, April 09, 2021, 07:23: Vacuum @ 1.92e-06T. Temp @ 1671 C. Auto-ramping TGHT / TBHT to 600 / 230 A @ 2 / 1 A per min.  

Friday, April 09, 2021, 08:40: Vacuum @ 3.96e-06T. Temp @ 1877 C. Auto-ramping TGHT / TBHT to 620 A @ 1 A per min.   

Friday, April 09, 2021, 09:10: Vacuum @ 3.60e-06T. Temp @ 1915 C. Drop TGHT from 620 A to 610 A manually.

TGHT to 613 A manually.

Friday, April 09, 2021, 09:15: Vacuum @ 3.60e-06T. Temp @ 1902 C. TGHT / TBHT @ 613 A / 230 A. Desired temperature reached.

Friday, April 09, 2021, 12:08: Auto-cooling @ 1 A per min initiated. 


Monday, April 12, 2021, 07:23: PS / Turbo pump / roughing pump off. 

Monday, April 12, 2021, 08:03: Vented. 

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