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Message ID: 17     Entry time: Wednesday, April 20, 2011, 16:42
Author: John Wong 
Target Material: Empty 
Target Oven W.O#: 38481-8 
Source: HP-FEBIAD 
Status: Done 
Subject: Sintering target oven coated with TaC 

Wed Apr 20 16:39:46 2011:  Target oven was coated with TaC early today.  The target was allowed to dry and then wrapped with 3 Ta heat-shields.  The target is in the evaporator and it is being pumped down.  Vac is currently at 9.48e-6 Torr. 

Wed Apr 20 17:51:12 2011 : TGHT @ 60A/0.225V, Vac @ 5.98e-6 Torr. 

Wed Apr 20 18:20:04 2011: Auto-heating begins @ 0.5A/min to max of 820A.

Thu Apr 21 10:12:34 2011: TGHT was auto ramping up slowly over night to 546A this morning.  The ramping rate has changed to 2A/min since the vacuuum is stable at ~3.9e-6 Torr.

 Tue Apr 26 11:10:03 2011:  TGHT reached to 820A max on April 21 and stayed at that current for a few hours.  ISAC Ops helped to ramped down the heater afterward.  (See attachment#1: Overall Process).

Result:  Good!  TaC is coated evenly on the target. 

 

 

 

Attachment 1: overall_process.jpg  77 kB  Uploaded Tuesday, April 26, 2011, 12:12  | Show | Show all
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