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Message ID: 389     Entry time: Wednesday, September 27, 2017, 18:06
Author: John Wong 
Target Material: np-SiC 
Target Oven W.O#:  
Source: TARGET BOAT 
Status: Done 
Subject: NS-npSiC & B3 pellets heat treatments 

Wednesday, September 27, 2017, 18:05

 3 samples from NS-npSiC pellets, pressured at 10T  (see lab book pg 53)

3 samples from B3 pellets, 600MPa (see lab book pg 50)

Desired temperature = 1550C, est current = 450A


 Thursday, September 28, 2017, 11:17

Vac at 8.8e-7 Torr.  

Ramping TGHT up to 450A at 0.2A/min


 Thursday, September 28, 2017, 17:54

Setup screen capture, see pg 53 for saved directory


 Friday, September 29, 2017, 23:54

TGHT reached to 450A/7.9V, temp at 1510C.

Tapping up TGHT to 465/8.2V to reach 1550C

Pressure coming down from 1.6e-6 Torr.

See attachment 1 for the 20-hour plot


 Sunday, October 01, 2017, 00:30

At around 20:00 on Sep 30, there was an increase of ~0.1 V which caused a rise in temp from 1550 to 1576C (see screen capture).  Pressure increased slightly.

Tapped down TGHT to 445A/8.05V; temp maintained at 1550C.


 Monday, October 02, 2017, 17:55

Cooling TGHT from 445A/8.07V, 1500oC to room temperature at 1A/min


 Tuesday, October 03, 2017, 11:09

Target has been cooled for over 10 hours. 

Venting chamber


 

Attachment 1: Capture.JPG  160 kB  Uploaded Saturday, September 30, 2017, 01:09  | Show | Show all
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