Ta#58 LP-SIS target description:
Total Ta foils = 470 [6x20 packs + 350 single discs]
Foil Thickness = 0.025mm
Target density = 14.16 g/cm3
Target length = 3.4 cm
Total Mass = 48.138 g [Incl foils + Ta wire on 6 packs]
Total mass w/ Target oven= 464 g
Discs in target are arranged as follows: 1pack / 75singles / 1pack / 100singles / 2packs / 100singles / 1pack / 75singles / 1pack
End caps installed (not yet expanded). No Ta heat shield added.
Tuesday, April 23, 2019, 13:54: Roughing.
Tuesday, April 23, 2019, 14:01: Turbo pump started.
Tuesday, April 23, 2019, 14:09: Turbo pump at speed.
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.
Wednesday, April 24, 2019, 08:38: Power / sources on.
Wednesday, April 24, 2019, 08:43: TGHT manually to 40A. Vacuum @ 1.87e-07T.
Wednesday, April 24, 2019, 08:45: Auto-ramping TGHT / TBHT @ 2 / 1 A per min to 350 / 180 A.
Slope found / set. Slope = 0.98. Laser on target, OK.
Wednesday, April 24, 2019, 11:58: Vacuum @ 4.45e-07T. Temp @ 1120 deg C. TGHT / TBHT @ 350 / 180 A.
Wednesday, April 24, 2019, 12:02: Auto-ramping TGHT / TBHT @ 2 / 1 A per min to 650 / 230 A.
Wednesday, April 24, 2019, 14:27: Halted auto ramping briefly. Set auto-ramping TGHT @ 2 A per min to 630 A .
Wednesday, April 24, 2019, 14:32: TGHT / TBHT @ 630 (627.9) / 230 (233.3) A.
Vacuum @ 1.15e-06T. Temp @ 1840 deg C. Hold.
Thursday, April 25, 2019, 06:59: Vacuum @ 2.74e-07T. Temp @ 1860 deg C. Hold.
Thursday, April 25, 2019, 08:05: Auto-ramping TGHT @ 2 A per min to 640 A.
Thursday, April 25, 2019, 08:13: TGHT / TBHT @ 640 (636.9) / 230 (233.16) A.
Vacuum @ 9.96e-07T. Temp @ 1878 deg C.
Thursday, April 25, 2019, 08:15: Auto-ramping TGHT @ 2 A per min to 645 A.
Thursday, April 25, 2019, 08:20: Auto-ramping TGHT @ 2 A per min to 650 A.
Thursday, April 25, 2019, 08:24: Vacuum @ 9.96e-07T. TGHT / TBHT 653 (650.3) / 230 (233.16) A. TGHT Voltage= 12.760V. Omega: 1902-1903 deg C. Desired temperature = 1900C reached.
Thursday, April 25, 2019, 14:00: Begin auto-cooling TGHT / TBHT @ -2 / -1 A per min.
Friday, April 26, 2019, 10:29: Power/heaters off. Turbo pumps off.
Friday, April 26, 2019, 10:42: Venting. |