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.

TM4 was connected in ITW this Tuesday. See attachment for checklist.

ITW secondary vacuum was bad in last two days after TM4 was connected in ITW. Today when check the exit 2 module, I found a small needle valve on exit 2 module top was slightly opened for some reason in past months. The valve is closed . ITW vacuum is returned to normal status.

ITW water interlock check is finished. Everything is good.

TM4 has been moved from the Conditioning Station to ITW with UC#27 target.

TCS is argon vented. TM4 is disconnected at TCS.

TM4 HS and window line are helium pressure checked at TCS. 70 psi helium 5 minutes. No response @1.2XE-8 atm.cc/sec. They are leak free.

 The results of the electrical check of TM#4 with UC#27 attached to it.

 The results of the electrical check of TM#4 with UC#27 attached to it.

TM4 with UCx#27 target has been moved from the South Hot-Cell to the Conditioning Station.

Dummy Ta target has been removed from TM4 and UCx#27 installed

The TM3 containment box has been installed onto TM4. No issues, leak checked ok.

TM4 has been moved from the Conditioning Station to the South Hot-Cell.

TM3 has been moved from the South Hot-Cell to the Middle-East silo.

TM3 has been moved from the Middle-East silo to the South Hot Cell.

The wiring for the SMP remote control module was inspected by Joel Semilla (TRIUMF electrician). The module was plugged in to verify there were no issues. No changes were suggested, and then wiring was approved.

 Installation of the video lines for the SMP cameras was completed yesterday according to IRH1670 Rev B.  All four cameras were confirmed to be displaying properly in the crane control room.  The cameras are powered from an outlet wired to circuit 35/37 on Panel #443 (located in the NHCSA).  This is independent from the power supply for other existing camera systems in the Target Hall.  The SMP turntable was rotated through the full range of motion (reached CW and CCW limits) and the cable routing and reel take-up system performed as expected.

 TM#4 has been moved from the south west silo to the south hot cell.

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

TM4 is moved from TCS to SW silo this morning. The move is good.