https://elog.triumf.ca/TIS/Test-Stand/919

Vacuum Group LD#1

(A) Top feed through fittings upgraded

Thursday, April 21, 2022, 13:11: Pumping directly on FS#4-Line A (TBHT). Leak rate @ 0.0E-07 atm-cc/sec.

Thursday, April 21, 2022, 13:13: Sprayed He on Block (A) & the TBHT solder joints. No signal change.

(B) Top feed through fittings upgraded.

Thursday, April 21, 2022, 13:39: Pumping directly on FS#4-Line B (TBHT). Leak rate @ 0.0E-07 atm-cc/sec.

Thursday, April 21, 2022, 13:42: Sprayed He on Block (A) & the TBHT solder joints. Dips up to a Leak rate @ 0.1E-07 atm-cc/sec & back to 0.0.

Disconnect LD. Will need to pressurize w/ He.

Thursday, April 21, 2022, 14:09: Pressurize FS#4-Line B (TBHT) to 50 PSI.

Thursday, April 21, 2022, 14:20: False positives. Saturated the area w/ He. LD off & lines depressurized.

Tuesday, April 26, 2022, 11:14: Leak rate @ 0.0E-07 atm-cc/sec. (No He)

Tuesday, April 26, 2022, 11:15: Pressurize FS#4-Line B (TBHT) to 120 PSI.

Tuesday, April 26, 2022, 11:20: Checked TBHT solder joints & water block (B). Leak rate @ 0.0E-07 atm-cc/sec. Disconnect, purge, & swap fittings to (A)

Tuesday, April 26, 2022, 11:31: Pressurize FS#4-Line A (TBHT) to 120 PSI. Leak rate @ 0.0E-07 atm-cc/sec

Tuesday, April 26, 2022, 11:38: Checked TBHT solder joints & water block (A). Leak rate @ 0.4E-07 atm-cc/sec on the water block.  Disconnect, purge.

Wednesday, April 27, 2022, 10:38: Indium gasket installed on FS#4-Line A water block.

Wednesday, April 27, 2022, 10:43: Leak rate @ 0.0E-07 atm-cc/sec. (No He)

Wednesday, April 27, 2022, 10:44: Spiked as soon as He was applied.

Wednesday, April 27, 2022, 11:14: Line A removed.

Wednesday, April 27, 2022, 11:40: Line A reinstalled after inspection w/ new Indium gasket fitted. Gasket only. No C-Seal.

Wednesday, April 27, 2022, 11:44: Leak rate @ 0.0E-07 atm-cc/sec. (No He)

Wednesday, April 27, 2022, 11:46: Spiked as soon as He was applied.

Wednesday, April 27, 2022, 11:53: New Indium gasket fitted. Gasket only. No C-Seal.

Leak rate @ 0.0E-07 atm-cc/sec. (No He)

Wednesday, April 27, 2022, 11:54: Pressurize to 30 PSI. Leak rate @ 0.0E-07 atm-cc/sec

Wednesday, April 27, 2022, 11:57: Pressurize to 50 PSI. Leak rate gradually increased to the (X)E-05 atm-cc/sec range.

Multiple leak checks & gasket attempts Thursday.

Monday, May 02, 2022, 09:45: Indium gasket installed w/ 90-100 inch pounds of torque. Used a heat gun up to 90. Allowed to cool, then given one more tightening.

Monday, May 02, 2022, 09:57: Leak rate @ 0.0E-08 atm-cc/sec. (No He) using the sniffer.

Monday, May 02, 2022, 09:59: Initial leak rate @ 0.0E-08 atm-cc/sec. (w/ 120 PSI He)

Monday, May 02, 2022, 10:11: Leak rate @ 0.0E-08 atm-cc/sec. (w/ 120 PSI He).

Monday, May 02, 2022, 10:20: BV1B open. Rouging

Monday, May 02, 2022, 10:22: BV1A open.

Monday, May 02, 2022, 11:51: TP1B on.

Monday, May 02, 2022, 11:57: TP1A on.

Monday, May 02, 2022, 12:05: IG1 on.

Monday, May 02, 2022, 12:10: Vacuum @ 4.19e-05T & dropping.

Monday, May 02, 2022, 13:59: Vacuum @ 1.33e-05T

Monday, May 02, 2022, 14:04: FS#4 open. Vacuum @ 1.33e-05T. Stable. No immediate Spike.

Monday, May 02, 2022, 14:05: FS#2 open. Vacuum @ 1.33e-05T.

Monday, May 02, 2022, 14:06: FS#3 open. Vacuum @ 1.33e-05T.

Monday, May 02, 2022, 14:09: FS#5 open. Vacuum @ 1.33e-05T. Stable.