Tuesday, March 20, 2018, 14:43

Target container was previously coated with TaC and sintered.

Container is wrapped with 3 layers of Ta-heat shield, including the center block

The target consists of 230 discs of UCx with 7.28cm in length [6 packs of 5 + 200 single discs].

Discs in target are arranged as follows: 1pack / 55singles / 1pack / 50singles / 2packs / 50singles / 1pack / 45singles / 1pack

A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down.

The right side is open with a TaC coated spring to help hold materials in.

An extra 5 single discs are loaded on the right side on top of the last pack, these discs will be removed after conditioning and analysed using SEM and XRD

The chamber is currently pumping down.

TGHT will be ramped up to 445A and TBHT will be ramped up to 230A [same parameters used to reach 1900C in evap2 when sintering TaC coating - elog402 evap2]

NOTE: This will be the first UCx target to go online using the TBHT in evap1 after the target is loaded with materials.

 Wednesday, March 21, 2018, 09:37

IGP1 = 2.47e-6 Torr

Tapped up manually to 40A.

TGHT = 40A, 0.61V

TBHT = 40A, 0.78V

Waited ~1hr, vacuum stable IG1 = 9.3e-6 Torr

Initiating auto-ramp for TGHT at a rate of 0.2A/min

Initiating auto-ramp for TBHT at a rate of 0.1A/min

Parameter setup: 5.0e-5 good vac, 8.0e-5 bad vac.

Wednesday, March 21, 2018, 13:02

TGHT = 57A, 0.72V

TBHT = 48A, 0.85V

IG1 = 5.8e-5 Torr

Vacuum stable.

Changing vacuum limits.

Vacuum limit stop at 3.0e-4 Torr, backing off at 6.0e-4 Torr.

 Monday, March 26, 2018, 09:32

TGHT = 450A, 4.54V

TBHT = 230A, 2.75V

IGP1 = 8.99e-7 Torr

Target has remained at max setpoint over weekend.

Initiating auto-cool at 1.0A/min for the TGHT and 0.5A/min for the TBHT.

 Wednesday, March 28, 2018, 11:31

Evap1 was vented in Ar and transferred to the glove box yesterday.

Inspection of target still required as well as 2nd endcap to be inserted.