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Wednesday, May 04, 2016, 13:28
Target boat has a layer of niobium foil on the bottom of the boat.
A niobium foil has been made with slots to hold samples [similar to when sintering endcaps] *See attached photos
Larger niobium samples are placed in the slots, holding in place, to avoid warping; smaller niobium sample sitting inside the boat by itself.
Smaller sample closest to OMEGA IR reading [right side]
Boat is wrapped with 1 large layer of Ta foil, wrapped around the boat 3x, careful to avoid touching samples.
Loaded into evap2 yesterday.
Vacuum pump bearings gone - pump replaced this morning by vacuum group.
Pumping down now...
Friday, May 06, 2016, 13:36
HS water valves opened, no leaks detected.
Tapped up manually to 35A.
IGP1 = 2.4e-7 Torr
Setting auto-ramp rate at 0.2A/min to 250A over the weekend.
Will tap up manually monday to final desired temperature of 1400C.
Monday, May 09, 2016, 09:38
OMEGA = 1128C
IGP1 = 1.3e-7 Torr
TGHT = 250A, 3.7V
Tapping up manually to 1400C...
Monday, May 09, 2016, 14:05
Evap2 has reached ~1405C
TGHT = 341A, 5.34V
IGP1 = 1.9e-7 Torr
Will remain at max setpoints for min 4hrs then initiate cool down.
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