Wednesday, July 19, 2017, 13:44

Discs previously casted by Marla and Pauline and weighed. 

Discs are placed inside a small graphite container.

Graphite container with discs loaded with 30 discs was loaded into Ta-boat previously coated with TaC.

Ta-boat is wrapped with 3 Ta heat shields.

Loaded in evaporator 2.

Chamber currently pumping down.

Thursday, July 20, 2017, 16:07

 HS water valves were opened in the morning, no leaks were detected.

Perform water test to confirm paddle wheels are working well.

Current was tapped manually to 40 A.

Read out on meter confirmed paddle wheels are registering 

Tap back down to 20 A, tripped off system on purpose by closing HS water valves.

TGHT tripped off as expected.

Water flow test was good, initiating ramp up of samples.

Taped manually to 40 A.

After the stabilization of the vacuum auto ramping was set up to 0.2 A/min.

Up to a final set up point of 250 A.

Final desired temperature ~1800 C.

 Friday, July 21, 2017, 10:20

Final set up from July 20 was reached.

Current reading: 244.6 A.

Voltage reading: 3.82 V.

Temperature reached: 1105 C.

Final set up was change to 1500 A.

The temperature reached at 6 pm was 1936 C so the current  was decreased  to 488 A.

The final temperature after 30 min was 1800 C.

The set up stayed the same for the weekend.

 Monday, July 24, 2017, 13:06

Temperature reading in the morning was 1856 C.

TGHT: 487.87 A, 9.07 V

TGHT power supply: 

IGP1: 3.75e-7 Torr

IGP2: 3.51e-7 Torr

Started to ramp down at 1 A/min rate.

Initiating auto cooling at 1.0A/min for TGHT.

 Tuesday, July 25, 2017, 09:27

LaC2/C discs were taken off of evap2.

LaC2/C discs were brought in to glove box.