Logbooks Lab Maintenance Evaporator_1 Evaporator_2 Laser cutter Target Production Test-Stand RH-ISAC RH-Cyclotron RH-Meson Hall RH-Beamlines RH-ARIEL
  Evaporator_1  Not logged in ELOG logo
Message ID: 7     Entry time: Tuesday, April 05, 2011, 10:37
Author: John Wong 
Target Material: Empty 
Target Oven W.O#: 38481-6 
Source: HP-FEBIAD 
Status: Done 
Subject: Fins diffusion bonding  

Tue Apr 5 10:36:53 2011:  Target oven is wrapped with 3 Ta-heat shields.  The evaporator is in the process of pumping down. 

Tue Apr 5 14:54:00 2011:  Evap has been pumped down for over 4 hours.  Vac is currently at 5.5e-6 Torr. (See Attachment#1)

Tue Apr 5 15:16:31 2011: TGHT is turned on.  Set  @ 20A/0.102V; panel reads 18A.  Vac @ 4.62e-6 Torr. 

Tue Apr 5 15:18:16 2011: TGHT set @ 40A/0.216V; panel reads 37A.  Vac @ 4.63e-6 Torr. 

Tue Apr 5 15:19:03 2011: Start Auto-heating.  Parameter setup:  TGHT rate @ 2A/min --> 820A max.  Incrementing if vac <4.5e-5 Torr, and backing off if vac >6.5e-5 Torr.

 Wed Apr 6 09:18:22 2011: TGHT was left at the auto- heating mode over night and  had been at 850A for about 12hrs; Vac @ 4.36e-6 Torr.  (see Attachment#2) 

Wed Apr 6 09:20:53 2011: Auto-cooling down has just started. 

Wed Apr 6 15:33:51 2011:  Auto-cooling completed.  (see Attachment #3 for the overall process)

Wed Apr 6 15:37:10 2011: TGHT p/s off, Venting evaporator. 

 

Attachment 1: pumping_down.jpg  95 kB  Uploaded Tuesday, April 05, 2011, 15:55  | Show | Hide all
Attachment 2: heatingup.jpg  162 kB  Uploaded Wednesday, April 06, 2011, 10:20  | Hide | Hide all
heatingup.jpg
Attachment 3: cooling_down.jpg  166 kB  Uploaded Wednesday, April 06, 2011, 16:34  | Show | Hide all
ELOG V2.9.2-2455