The target was inspected by Chad and Anders in the Hot Cell. Electrical megger tests were done during the assembly. It was found that Insulators No 3 (ITD0311) and No 2 (ITD0310) failed to hold voltage after the run.

EE to HS was measured OL at 1000  V.

Photos can be found on DocuShare

The Target Assembly was inspected with Chad, Jens Henning and Anders today.

• The Target Container was broken.
• Material was deposited on the Heat Shield around the Target Center Block
• Material was deposited on the IG-LIS source.
• Electrical checks to ground (HS)
  • The Extraction Electrode passed the electrical check at 1000V
  • The Exit Electrode (c) held only 40V at 22 kOhm
  • The IG Electrode 1 (f) held 250V at 390 MOhm
  • The IG Electrode 2 (g) held only 40V at 22 kOhm
• IG 1 and IG 2 both held 250V at 450 MOhm to Exit Electorde (c)
• No spark marks were observed on the 9-pin connector

See photos of the inspection on DocuShare

David W. has installed two SST Proteus flow meters, model OV7006FTA32, on ITW Heat Shield and Coil. The flow meters are connected to a power supply and a data logger in the electrical room.

The Heat Shield flow meter has SN 00278112 and is on the Black wire pairs and connected to CH3 & CH4 on the logger.

The Coil flow meter has SN 00278113 and is on the Green wire pairs and connected to CH1 & CH2 on the logger.

The first channel (CH1, CH3) is temperature in degrees Celcius and the second channel (CH2, CH4) is flow rate in liters per minute.

A camera has been placed on the logger.

Flow rates today (2014-04-04):

HS        8.2 - 8.3 lpm
COIL    8.0 - 8.1 lpm

Calibration sheets

UPDATE 2014-04-11: Corrected HS to CH3 & CH4.

PDFs of temperature and flow traces are available on DocuShare

Monday, April 28, 2014, 09:27. p+ off since 8:20

Tuesday, April 29, 2014, 09:28: p+ 30 uA

Monday, May 05, 2014, 10:49: p+ off since 8:39
(Downloaded data and updated traces on DocuShare)

 Wednesday, May 14, 2014
(Downloaded data and updated traces on DocuShare)

Coil not used on TM1. Data and plots on DocuShare

Friday, June 13, 2014, 10:30. ITE receving p+

 Monday, June 16, 2014, 09:30: p+ off for maintenance day

 Thursday, June 19, 2014, 16:14: 10 uA p+ on ITW

Tuesday, July 08, 2014, 10:32:

Data uploaded to DocuShare

When the Containment Box was opened today by Chad for a target change, we found the conductor insulator block B (ITD0054) to be broken close to the right TGHT terminal. Chad was nevertheless able to remove the target. See DocuShare and attached file for photos.

An attempt to replace the insulator will be made tomorrow with a spare.

A small sticky piece, likely off plastic material, was found next to the left main source tray insulator. The piece was removed from the Containment Box. See link above and attachment for photos.

See attached pdf and DocuShare for more photos. It may be possible to clean some of it from the Ground Electrode.

Anders Mjos wrote:

When the Containment Box was opened today by Chad for a target change, we found the conductor insulator block B (ITD0054) to be broken close to the right TGHT terminal. Chad was nevertheless able to remove the target. See DocuShare and attached file for photos. An attempt to replace the insulator will be made tomorrow with a spare. A small sticky piece, likely off plastic material, was found next to the left main source tray insulator. The piece was removed from the Containment Box. See link above and attachment for photos.

 The two insulators ITD0053 and ITD0054 was replaced this morning by Chad. Photos on DocuShare. All bolts torqued with torque wrench see attached PDF for values.

 See attached PDF. The object is not accessible with only the front panel removed. Photos on DocuShare.

Anders Mjos wrote:

See attached pdf and DocuShare for more photos. It may be possible to clean some of it from the Ground Electrode.

 Chad cleaned the GND electrode yesterday June 26th - see attached PDF. Photos on DocuShare.

Wednesday, October 14, 2014

 The BIAS voltage was brought up between 1:30pm and 5pm. Sparks tripped the BIAS power supply at voltages between 20 - 24 kV. Multiple attempts were made. The current was about 50-60 uA.

Wednesday, October 15, 2014

Temperature in the cooling circuit is too hight to do a HV test. The cooling circuit was started, but shuts off after ~10 m

Thursday, October 16, 2014

David and I found that the fans on the cooling unit on the roof did not run and that the compressors get hot and likely trip on over temperature protection (hot to the touch). We found the manual in the control panel of the unit.

10am: HV to 20kV before a spark tripped the PS. Current at 40 uA - resistivity at 11.9 Mohm

5pm: HV to 20kV before fluctuations in current, then a spark tripped the PS. Current around 40 uA. Resistivity 12.6 Mohm

Friday, October 17, 2014

8am: Staging did not start over night. TS5 temp is 31 deg C, which would have tripped power supplies. Reset and enabled staging.
The system increased staging until all 3 compressors were running.
9am: Cooling supply temperature reached ~3 deg C. Disabled staging and switched off all pumps
2pm: Switched off water circulation for the weekend.

NOTE: If there is a problem with the chiller unit (ie Fault 1 or Fault 2), a power cycle may reset the VFDs for the fans and clear the problem. To do so it is necessary to wait long enough for the VFDs to power off completely. The display will first start to flash before going dark. Wait another few seconds before powering the system back up. The chiller unit is located on the ISAC I Penthouse Roof.

A service tech from Daikine was on site today and has cleaned the chiller unit. In the process he also cycled the power which returned the operation back to normal. The tech provided us with manuals for the VFDs. These can be consulted on DocuSharefor looking up error codes.

Fault 1 refers to unit 1 and Fault 2 to unit 2.

NOTE: If cooling is required, the compressors will have to be run manually. Make sure to switch it off again when the water has reached an acceptable temperature.

The staging did not work properly this morning. Dave Morris have been contacted and will look into it.

 See work permit for details

 A copper bar jumper (ITD0488) was installed on the TGHT, TBHT and COIL conductors on the taregt hall side for TCS testing.

 TCS:WPV1 does not open when staging is enabled. Multiple attempts have been made, but the valve remains closed.

Measurement taken at 14:25. IG2 at ~7.7E-6 T

Anders Mjos wrote:

TCS:WPV1 does not open when staging is enabled. Multiple attempts have been made, but the valve remains closed.

 Dave Morris looked at the PLC controls and found that the code was not writing to the output after the PLC migration. He corrected it.

Monday, December 08, 2014, 14:00: Dan M and Anders connected the water supply to circuit D and installed the module cover.

Monday, December 08, 2014, 14:50: Circulating water on circuit D. IG1 vacuum stable at 3.1E-7 T. No response on mass 18 on RGA

Monday, December 08, 2014, 15:30: Test TGHT and TBHT PS. Can be switched on, but set points need to be corrected.

Monday, December 08, 2014, 16:11: Started CHILLCP2

Monday, December 08, 2014, 16:26: Stopped CHILLCP2

Tuesday, December 09, 2014, 09:02: Started CHILLCP1. TS5 at 31.5 C

Tuesday, December 09, 2014, 09:33: Stopped CHILLCP1. TS5 at 17. 1 C

Tuesday, December 09, 2014, 14:54: Tested TGHT to 600 A and 2.05 V (local read back). EPICS read back and set point is not correct. Circuit resistance ~ 3.4 mOhm.

Tuesday, December 09, 2014, 15:14: Tested TBHT to 272 A and 0.97 V (local read back). EPICS read back and set point is not correct. Circuit resistance ~ 3.6 mOhm.

Tuesday, December 09, 2014, 16:01: TGHT and TBHT switched off.

Wednesday, December 10, 2014, 08:30: TGHT and TBHT power supplies cannot be run with TS5 > 25. Bypasses/Forces not implemented. Waiting for controls.

Wednesday, December 10, 2014, 10:44: Water is stable on RGA, however N, O and Ar shows repeated short term spikes of ~4x magnitude. Spikes are also visible on IG1

Vacuum stable over night.

Thursday, December 11, 2014, 08:22: Starting CHILLCP3. TS5 at 33.1 C, TBHT at 30.2 C

Thursday, December 11, 2014, 08:58 : Staging enabled

Vacuum stable over night.

Dave M corrected scale of TGHT and TBHT.

TS5 forced

Lost water in expansion tank over the weekend. See other e-log entries regarding the water leak and fix. Vacuum stable over the weekend.

Monday, December 15, 2014, 13:49: TGHT and TBHT PS at 600 A and 270 A

Monday, December 15, 2014, 14:06: TGHT to 700 A

Monday, December 15, 2014, 18:03: Autoramping down at 5 A/15 s

Monday, December 15, 2014, 18:26: TGHT and TBHT at 0 A. TS5 is at 35 C

Vacuum stable over night

Tuesday, December 16, 2014, 08:07: TGHT and TBHT to 700 A and 270 A

Tuesday, December 16, 2014, 09:00: Stopped MP2. MP3 tripped. TGHT and TBHT tripped.

Tuesday, December 16, 2014, 09:05: started MP2, TGHT and TBHT

Tuesday, December 16, 2014, 16:21: TGHT to 600 A. Will leave both TGHT and TBHT on over night to keep the water warm.

Vacuum stable over night. TS5 at 37.5 C TBHT return at 34.5 C

Wednesday, December 17, 2014, 08:15: TGHT to 750 A

Wednesday, December 17, 2014, 08:35 : TGHT to 800 A

Wednesday, December 17, 2014, 16:09 : TGHT to 700 A. TS5 at 40 C TBHT return at 37 C

Vacuum stable over night. TS5 at 39.3 C and TBHT return at 36.2 C

Thursday, December 18, 2014, 07:54: Starting CHILLCP1

Thursday, December 18, 2014, 08:34: Stopped cHILLCP1 TS5 at 20 C

Thursday, December 18, 2014, 09:07: TGHT to 800 A

Thursday, December 18, 2014, 16:10: TGHT to 700 A

Vacuum stable over night. TS5 at 39.0 C and TBHT return at 35.9 C

Friday, December 19, 2014, 08:17: TGHT to 800 A

Friday, December 19, 2014, 11:54: TGHT to 650 A. TS5 at 39.9 C 

Vacuum stable over the weekend. TS5 at 38.4 C and TBHT return at 35.4 C

Monday, December 22, 2014, 08:31 : Started CHILLCP3

Monday, December 22, 2014, 09:30: Stopped CHILLCP3 

Monday, December 22, 2014, 10:08: TGHT to 800 A

Monday, December 22, 2014, 16:25: TGHT to 700 A

Vacuum stable over night. TS5 at 38.4 C and TBHT return at 35.3 C

Tuesday, December 23, 2014, 08:16: TGHT to 800 A

Tuesday, December 23, 2014, 13:10 : Starting CHILLCP3. TS5 at 39.5 C and TBHT return at 36.4 C

Tuesday, December 23, 2014, 13:14: TGHT and TBHt to 0 and off. 

Leak check found no leaks on Service Cap

Tuesday, December 23, 2014, 14:14 : Stopped CHILLCP3

Tuesday, December 23, 2014, 14:20: RGA filament off

Tuesday, December 23, 2014, 14:23: Stopped MP2 and MP3

 The level dropped below 15 in over the weekend. MP2 stopped, but MP3 condtinued pumping.