Ta#56 HP-SIS target description:

Total Ta foils = 470 [6x20 packs + 350 single discs]

Foil Thickness = 0.025mm

Target density = 14.01 g/cm3

Target length = 3.4 cm

Total Mass = 47.374 g [Incl foils + Ta wire on 6 packs]

Total mass w/ Target oven= 1469 g

Discs in target are arranged as follows: 1pack / 75singles / 1pack / 100singles / 2packs / 100singles / 1pack / 75singles / 1pack

Thursday, June 21, 2018, 11:430: Ta#56 loaded into Evap 2 

Thursday, June 21, 2018, 11:37: Roughing

Thursday, June 21, 2018, 11:48 : Turbo pump started.

Thursday, June 21, 2018, 11:56 : Turbo pump at speed

Monday, June 25, 2018, 08:00: Vacuum @ 3.35e-07T

Monday, June 25, 2018, 08:05: TGHT/TBHT Power supplies switched on.

Monday, June 25, 2018, 09:35: Vacuum @ 3.23e-07T. Manually bump up TGHT to 40A.

Slope found / set.

TBHT will be ramped up to 230A at 1.0A/min.

TGHT will be ramped up to 650A at 2.0A/min.

Final desired temperature = 1900C

OMEGA slope = 0.98

Monday, June 25, 2018, 11:41: Auto-ramping TGHT / TBHT @ 2 / 1 A per min to 300 / 180 A 

Monday, June 25, 2018, 13:28: Check: Vacuum @ 1.08e-06T. TGHT / TBHT @ 248 / 110 A

Monday, June 25, 2018, 13:50: TGHT ramping halted momentarily. Limit increased to 350 A, continue ramping.

Monday, June 25, 2018, 14:44: Check: Vacuum @ 1.08e-06T. TGHT / TBHT @ 350 / 180 A. (hold till am)

Omega: 1033 deg C

Tuesday, June 26, 2018, 08:37: Vacuum @ 3.03e-07T. Auto-ramping TGHT / TBHT @ 2 / 1 A per min to 600 / 230 A . Omega: 1010 deg C (approx)

Tuesday, June 26, 2018, 11:25: Vacuum @ 1.34e-06T. TGHT / TBHT @ 248 / 110 A. Omega: 1605 deg C (approx) 

Auto-ramping TGHT  @ 2 A per min to 650 A

Tuesday, June 26, 2018, 12:06: Limited at 608A ? Display still ramping past the auto-ramp limit. 

Tuesday, June 26, 2018, 12:24 : Auto ramp halted. Display brought to 610 A. Readback 603 A

Tuesday, June 26, 2018, 12:41: Voltage limit adjusted to 12.00V. Mnaualy increased TGHT to 620 A. Auto-ramping TGHT  @ 2 A per min to 650 A

Tuesday, June 26, 2018, 12:59: Check: Vacuum @ 1.53e-06T. TGHT / TBHT @ 650 / 230 A. 

Omega: 1747 deg C

Tuesday, June 26, 2018, 15:07: Check: Vacuum @ 9.73e-07T. TGHT / TBHT @ 650 / 230 A. (hold till am)

Omega: 1760 deg C

Wednesday, June 27, 2018, 07:49: Check: Vacuum @ 5.06e-07T. TGHT / TBHT @ 650 / 230 A.

Omega: 1796 deg C. Begin auto-ramping TGHT to 700 A @ 2 A per min with pause at 675 A. Monitor.

Wednesday, June 27, 2018, 08:00: Check: Vacuum @ 5.80e-07T. TGHT / TBHT @ 675 / 230 A.

Omega: 1843 deg C. Begin auto-ramping TGHT to 700 A @ 2 A per min. Monitor.

Wednesday, June 27, 2018, 08:16: Vacuum @ 7.45e-07T. TGHT / TBHT @ 700 / 230 A. Omega: 1890 deg C (approx). 

Wednesday, June 27, 2018, 08:23: Vacuum @ 8.53e-07T. TGHT / TBHT @ 707 / 230 A. TGHT Voltage= 10.783V. Omega: 1906-1913 deg C. Desired temperature = 1900C reached.

Wednesday, June 27, 2018, 13:11: Vacuum @ 6.77e-07T. Omega: 1902-1915 deg C

Wednesday, June 27, 2018, 14:53: Begin auto-cooling TGHT / TBHT @ - 2 / -1 A per min overnight. 

Thursday, June 28, 2018, 07:39: Power supplies off. Turbo pump off.  

Thursday, June 28, 2018, 09:38: Vented. Remove From Evap 2.