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Message ID: 12     Entry time: Wednesday, April 13, 2011, 10:37
Author: John Wong 
Target Material: Empty 
Target Oven W.O#: 38481-7 
Source: HP-FEBIAD 
Status: Done 
Subject: Diffusion bonding of Ta Fins for FEBIAD-HP 

Wed Apr 13 10:37:25 2011:  Target is wrapped with 3 Ta-heat shields.  Evaporator is currently being pumped down.

Wed Apr 13 15:28:02 2011:  Evaporator has been pumped down for over 5 hrs.  Vac @ 2.38e-6 Torr.  (See attachment1: Pumping process)

Wed Apr 13 15:29:21 2011: Set TGHT @ 20A/0.074V, Vac 2.98e-6 Torr.

Wed Apr 13 15:30:00 2011: Set TGHT @ 40A/0.158V, Vac @ 2.30e-6 Torr. 

Wed Apr 13 15:37:42 2011:  Auto heating begins.  TGHT will increase to 820A by 2A/min.  Cooling down will take after the current has stayed at 820A for at least 4 to 5 hrs.   ISAC Ops will help to start the cooling process on April 14 at 03:00.  (See attachment#2: Parameter Setup).

Thu Apr 14 09:49:31 2011:  TGHT reached to 820A and stayed there for about 5.5 hrs.  ISAC Ops helped to start the cooling process (see attachment3: Cooling process).  The target is ready to come out from the evaporator.   P/S is off and evaporator is vented.

Mon Apr 18 12:18:55 2011:  A problem with the bolt and washer occurred during the fin diffusion bonding.  (See attachment #1 and Message ID#15 for more details) .  This target needs to be repaired.

 

 

 

Attachment 1: pumping_down.jpg  158 kB  Uploaded Wednesday, April 13, 2011, 16:28  | Show | Hide all
Attachment 2: Autoheating_parameter_setup.jpg  152 kB  Uploaded Wednesday, April 13, 2011, 16:38  | Show | Hide all
Attachment 3: cooling_down.jpg  161 kB  Uploaded Thursday, April 14, 2011, 10:52  | Show | Hide all
Attachment 4: washer_on_target_leg.jpg  29 kB  Uploaded Monday, April 18, 2011, 13:21  | Show | Hide all
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