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Entry  Thursday, February 08, 2018, 14:51, Marla Cervantes, UO2/C, 40282-2 , TARGET BOAT, Problems, Carbonizing UO2/C discs for 1stepUCx in graphite sample container _#10 
    Reply  Friday, February 09, 2018, 16:57, Marla Cervantes, UO2/C, 40282-2 , TARGET BOAT, Problems resolved, Carbonizing UO2/C discs for 1stepUCx in graphite sample container _#10 
       Reply  Friday, February 09, 2018, 17:04, Marla Cervantes, UO2/C, 40282-2 , TARGET BOAT, Done, Carbonizing UO2/C discs for 1stepUCx in graphite sample container _#10 20180209_153539.jpg20180209_153728.jpg20180209_153817.jpgCarbonization-current_trippoff.JPGCarbonization-Batch10-090218.docx
Message ID: 191     Entry time: Friday, February 09, 2018, 16:57     In reply to: 190     Reply to this: 192
Author: Marla Cervantes 
Target Material: UO2/C 
Target Oven W.O#: 40282-2  
Source: TARGET BOAT 
Status: Problems resolved 
Subject: Carbonizing UO2/C discs for 1stepUCx in graphite sample container _#10 

Marla Cervantes wrote:

 Thursday, February 08, 2018, 14:50

35 circles from cast#2 of 14 mm diameter were packed into a graphite sample container.

35 x UO2/C circles = 4.76 g

Graphite container = 5.3 g

Graphite tube is placed inside a target boat.

Boat previously coated with TaC and sintered.

Ta-target boat is wrapped with 3 new Ta foils for heat shielding and the boat was installed in Evap1.

Chamber currently pumping down.


 Friday, February 09, 2018, 10:40

Initial IGP1 = 4.54e-7 Torr

Tapped up entire process manually to 520A in 25 min

TGHT = 520 A, 5.49 V

Vacuum coming down indicating carbonization process complete.  

Current suddenly tripped off from 520 A to 0 A.

There was not a power outage.

There was good vacuum.

Water cooling did not trip off 


 

 Friday, February 09, 2018, 16:49

The power supply was tested and its working normally.

Apparently a glitch on EPICS caused the tripped off.


 

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