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Entry  Tuesday, February 13, 2018, 11:44, Marla Cervantes, UO2/C, 40282-1, TARGET BOAT, Problems, Carbonizing UO2/C discs for 1stepUCx in graphite sample container _#11 Carbonization-current_trippoff2.JPGTa-Boat.jpgC-Container.jpg
    Reply  Friday, March 02, 2018, 16:35, Marla Cervantes, UO2/C, 40282-1, TARGET BOAT, Problems resolved, Carbonizing UO2/C discs for 1stepUCx in graphite sample container _#11 
       Reply  Friday, March 02, 2018, 16:35, Marla Cervantes, UO2/C, 40282-1, TARGET BOAT, Done, Carbonizing UO2/C discs for 1stepUCx in graphite sample container _#11 
Message ID: 193     Entry time: Tuesday, February 13, 2018, 11:44     Reply to this: 195
Author: Marla Cervantes 
Target Material: UO2/C 
Target Oven W.O#: 40282-1 
Source: TARGET BOAT 
Status: Problems 
Subject: Carbonizing UO2/C discs for 1stepUCx in graphite sample container _#11 

 Tuesday, February 13, 2018, 11:39

35 circles of 14 mm diameter were packed into a graphite sample container.

35 x UO2/C circles = 5.74 g

Graphite container = 5.20 g

Graphite tube is placed inside a target boat.

Boat previously coated with TaC and sintered.

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

Chamber currently pumping down.


 Tuesday, February 13, 2018, 15:30

Initial IGP1 = 2.73x10e-6 Torr

Tapped up entire process manually to 520 A in 30 min

TGHT = 520 A, 5.41 V

Vacuum coming down nicely indicating carbonization process complete.

Current trip off after 5 min of being at 520 A.


 Wednesday, February 14, 2018, 15:32

EVAP1 vented with Argon and the target was removed.

Target was transferred to glove box.

Ta boat and graphite container look unbroken.

Attachment 1: Carbonization-current_trippoff2.JPG  83 kB  Uploaded Tuesday, February 13, 2018, 15:35  | Show | Hide all
Attachment 2: Ta-Boat.jpg  1.904 MB  Uploaded Wednesday, February 14, 2018, 15:41  | Show | Hide all
Attachment 3: C-Container.jpg  1.713 MB  Uploaded Wednesday, February 14, 2018, 15:41  | Show | Hide all
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