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Entry  Wednesday, March 23, 2011, 18:23, John Wong, , , , , Diffusion Bonding of Ta Fins for FEBIAD HP-A (w.o#38481-4) grab.K18246.pnggrab.g20718.pnggrab.r27097.pnggrab.t30095.png
    Reply  Friday, March 25, 2011, 17:22, John Wong, , , , , Diffusion Bonding of Ta Fins for FEBIAD HP-A (w.o#38481-4) 
       Reply  Monday, March 28, 2011, 11:20, , , , HP-FEBIAD, Done, Diffusion Bonding of Ta Fins for FEBIAD HP-A (w.o#38481-4) 
Message ID: 3     Entry time: Monday, March 28, 2011, 11:20     In reply to: 2
Author:  
Target Material:  
Target Oven W.O#:  
Source: HP-FEBIAD 
Status: Done 
Subject: Diffusion Bonding of Ta Fins for FEBIAD HP-A (w.o#38481-4) 

John Wong wrote:

John Wong wrote:

March 23, 2011

12:30: Pumping down evaporator

18:24: IEVAPIG1 is reading at 4.55e-6 Torr.  The p/s will be turned on tomorrow since there is no ISAC Ops on site. 

March 24

11:57: Evaporator has pumped down over night.  Vacuum @ 2.01e-6 Torr.  

14:42: TGHT @ 20A, Vac @ 1.65e-6 Torr.

14:52: TGHT @ 40A, Vac @ 1.66e-6 Torr.

14:52: Auto Heating begins: TGHT to max 820A.  Incrementing if vac < 4.5e-5 Torr, backing off if vac > 6.5e-5 Torr.

 16:04: TGHT @ 181A, vac @ 7.59e-6 Torr.

18:03: TGHT @ 420A, vac @ 4.71e-6 Torr.   (See attachment 2 for TGHT/IG1 for the past 4 hours)

March 25,

11:15:  TGHT has been at 820A for 14hr.  Vac @ 4.27e-6 Torr.  (See attachement 3 for TGHT/IG1 for these past hours)

11:17:  Auto cooling down is in progress...

17:21:  Auto cooling down ended at TGHT ~100A.  The TGHT was tabbed down manually from 100A to zero.  (See attachment #4 for the cooling down progress)

 All the pumps are off.  The evaporator will be vented next week. 

 Evaporator Vented.

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