ITE is configured to take proton beam.

Starting HV tests on TM2 with 50uA of protons.

Tuesday, August 06, 2019, 03:37 : Ramping up 500V every 2mins or so, couple of sparks, then consistent sparks at 34kV. No vacuum response on IG1 for any sparks, even though the current spikes from around 40uA to 1300uA. Brought it down to 28kV to stop sparking. See a response on the EZL frequently.

Tuesday, August 06, 2019, 05:24 : Going above 30kV proves very difficult, lots of up and down, frequent sparks, still no vacuum response. Still seeing an EZL response.

Tuesday, August 06, 2019, 05:58 : Up to 31.5kV on bias, 1046V on EE and 15kV on EZL.

Tuesday, August 06, 2019, 06:50 : Controls are being sticky - not responding well.

Tuesday, August 06, 2019, 07:25 : Sat at 32 kV > 20mins with 2 sparks

Tuesday, August 06, 2019, 08:03 : lots of sparking at 36kV, went back down to 35kV. Current draw is 50uA.

Tuesday, August 06, 2019, 08:10 : lots of sparking after 9 mins at 35kV, had to turn it down to 34kV

Tuesday, August 06, 2019, 08:11 : Still sparking at 34, down to 33

Tuesday, August 06, 2019, 08:31 : At 33kV, sparked twice in 20mins and was going for another when the protons went off.

With protons off, the bias current dropped quickly from 66uA to 40uA and raising the bias to 40kV was not difficult.  Later bias up to 50kV. Still no conclusion on if the sparking was inside or outside of the vacuum. No vacuum response seems to indicate outside, however the influence of protons would indicate inside. To be investigated visually when TM2 comes to the HC.

TM2 was moved from ITE to South Hot Cell. Tantalum 58 target.

TM2 has been disconnected in ITE. The bias jumper between U and T was burned out during the last beam time.

 Here are the results of the electrical done at the south hot cell post beam of with the Ta#58 target attached and with just the module no target attached.

TM2 was moved from South Hot Cell to ITE. ZrC #8 target.

 Electrical of TM#2 with ZrC#8 at the south hot cell. See attached for details.

Ramped voltage on TM2 up to 30kV with no problems. Bias current is at 29uA, same as original TM2 bias current (see archiver for ITE June 15th, before protons) and similar to 31uA right after protons went off on Aug. 6.

TGHT=0A

TBHT=0A

BIAS V=30kV

BIAS current = 29uA

EZL V= 15kV

EZL current= 51uA

EE V= 1kV

EE current= 0.952mA

IG1= 8.6e-7

protons=0

This seems ok despite poor electrical checks showing 300 MOhm resistance between HV and ground. These values indicate a resistance of 1 GOhm. Let's see what happens when protons are on.

For future (optimistic) reference when testing protons:

BIAS=35kV, 35uA

EZL-17.5kV, 60uA

BIAS=38kV, 37uA

EZL=18.5kV, 63uA

Ramping up HV to ~30kV, encountered problems and had to drop back to 28kV. No response on IG1 or anything else during sparks. Lots of charging-type behaviour on the bias current. Protons at 55uA

Tuesday, September 17, 2019, 02:02 : 15 mins with only 1 spark at 30kV so increased the bias

Tuesday, September 17, 2019, 02:31 : 32kV. Current unstable

Tuesday, September 17, 2019, 02:41 : Current continues extremely unstable but not much sparking....

Tuesday, September 17, 2019, 02:53 : Proton beam trip initially settled the bias current down, but then current began climbing pretty steeply with protons still off

Tuesday, September 17, 2019, 03:28 : Protons dropped to 40uA from 55uA, Bias current is much more stable and no sparks for 25mins

Tuesday, September 17, 2019, 03:36 : Raising voltage easy to about 33.5kV then instability and sparking similar to around 31kV at 55uA p+

Tuesday, September 17, 2019, 04:45 : Lowered protons to 25uA and no sparks though the current is not stable

More things but forgot to write them down. Spreadsheet attached.

 TM#2 with ZrC#8 has been moved from the east station to the south hot cell.

 Results of the electrical check on TM#2 with ZrC#8 post beam.

1 Jumpers between 60KV common and FEBIAD lines were connected in an unusual way.  This should of had no impact on the ZrC run but would have to be corrected for any future FEBIAD runs.

2 Feedthrough U was mislabeled (label has been removed)

ZrC#8 has been removed from TM2. Upon removal of the high current tube heater bolts it was noticed that the tube was broken. Also the 9 pin connector has an arc mark (see pictures attached).

Ta#59 has been installed with new fasteners. High current fasteners torqued to 130 in lbs.

 The results of the electrical check on TM#2 with the Ta#59 target and without before the target was mounted on the module.

Tuesday, October 01, 2019, 15:15: Started roughing.

Tuesday, October 01, 2019, 16:30: Started TPs

Tuesday, October 01, 2019, 16:34: All TPs at speed

Conditioning completed over the weekend by RIB operations. The shutter was left closed on the module, so no beam could be seen on the FC. Conditioning otherwise OK.

TM2 has been connected at TCS this morning. helium pressure test on Tm2 HS line is done. No leak.

TM2 has been moved from the Conditioning Station to ITE with Ta#59 target.

Tm2 with Ta 59 has eben connected in ITE. Turbo pumps are started. See checklist

Feibiad gas line for ITE and its adapter fittings for TM2 are tested today by installing them on a dummy water stem. No leak on VCO fitting, adapter o-rings, and all Swagelock fittings of this assembly. Manual valve on gas line works fine.  The positional check on gas line between TM2 and ITW will be fulfilled next Tuesday during module disconnection. 

 TM#2 with Ta#59 has been moved from the ITE to the south hot cell.