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Entry  Thursday, December 07, 2017, 10:03, Laura Lambert, Endcaps, , TARGET BOAT, In progress, Sintering TaC coating on endcaps and springs 
    Reply  Thursday, December 07, 2017, 11:56, Laura Lambert, Endcaps, , TARGET BOAT, Problems, Sintering TaC coating on endcaps and springs trip_due_to_new_vacuum_limits_not_being_updated_properly.JPG
       Reply  Friday, December 08, 2017, 15:29, Laura Lambert, Endcaps, , TARGET BOAT, Problems resolved, Sintering TaC coating on endcaps and springs 
          Reply  Friday, December 08, 2017, 15:42, Laura Lambert, Endcaps, , TARGET BOAT, Done, Sintering TaC coating on endcaps and springs 
Message ID: 396     Entry time: Thursday, December 07, 2017, 11:56     In reply to: 395     Reply to this: 397
Author: Laura Lambert 
Target Material: Endcaps 
Target Oven W.O#:  
Source: TARGET BOAT 
Status: Problems 
Subject: Sintering TaC coating on endcaps and springs 

Laura Lambert wrote:

 Thursday, December 07, 2017, 09:57

Each endcap is wrapped in a separate piece of graphite foil and placed in a target boat.

There are also 4 coated springs, 2 on each side of the stack of endcaps.

The boat is wrapped with 3-layers of Ta heatshields.

Chamber pumped down overnight.

OMEGA slope = 0.98

HS water valves opened, no leaks detected.

IGP1 = 5.9e-7 Torr

IGP2 = 4.0e-7 Torr

Tapping up manually.

Final desired temperature = 1800C


 

 Thursday, December 07, 2017, 11:51

TGHT tripped off.

Turns out the vacuum limits have not been fully updated when they should have been and the old ones still apply.

IGP1 reached 8e-5 Torr which tripped off the system.

TGHT = 80A, 1.05V when the system tripped.


 

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