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Message ID: 207     Entry time: Monday, June 04, 2018, 11:29
Author: Marla Cervantes 
Target Material: UC2 
Target Oven W.O#: 40282-1 
Source: TARGET BOAT 
Status: Done 
Subject: Conditioning B13 and 2sc 

 Friday, June 01, 2018, 11:20

Target boat was previously coated with TaC and sintered.

Two small C-inserts of ~2cm length were placed on Ta boat

Sample 1-sc: 15 discs of cast 3 made with 1-step cast method (UCx+foil 1.437 g)

Sample 2-sc: 24 discs from rejected discs of 2-step casting (UCx+foil 1.585 g)

Ta boat was wrapped with 3 layers of Ta-heat shield

The chamber is currently pumping down.

TGHT will be ramped up to 495A [same parameters used to reach 1910C in evap2 when sintering TaC coating - elog410 evap2]


Monday, June 04, 2018, 11:27 

IG1 = 4e-7 Torr

Tapped up manually to 35A

Waited 1hr

Vacuum stable.

IG1 = 8.02e-7 Torr.

Initiating auto-ramp (0.1 A/min) up to 80 A


 Tuesday, June 07, 2018, 15:47

Vacuum stable

IG1 = 7.02e-7 Torr.

Changing auto-ramp to 0.02 A/min up to 140 A


Thursday, June 07, 2018, 15:49 

Vacuum stable 5.5e-7 Torr

Current 139 A, voltage 1.25 V

Changing auto-ramp to 0.1 A/min up to 495 


Saturday, June 9, 2018, 10:41 

The material stayed 4 hours at 495 A

Auto-ramp set to -1 A/min down to 0 A 


Monday, June 11, 2018, 17:43 

EVAPI was vented with Ar and UCx was transferred to glove box

 

 

 

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