Wednesday, March 06, 2013

The Cool Transfer Line (CTL) test target is installed for thermal tests. Drawing number is ITD0431 REV A.

Thermocouple channels are as follows:

T1: Cu block on CTL
T2: Heat Shield above CTL
T3: Heat Shield cooling water Supply
T4: Heat Shield cooling water Return

Cooling water is in Evap2 supplied to the cooling line that goes directly to the area on the Heat Shield above the CTL.

Test results attached.
 

Monday, March 11, 2013

The CTL test target was installed again for a second thermal test. CTL block fastened to HS with 1 in lbs. A small piece of Ta-foil of 0.001" thickness was used between the CTL Cu-block and the Ta transfer line to reduce the heat transfer..

Thermocouples were re-attached to CTL and Heat Shield (see above for channels #s).

See attached graph (PDF) for details.

Wednesday, March 13, 2013 

Thermocouple channels (see attached PDF for photos)
T1 - Left target leg at tube
T2 - Between cooling fins close to tube, left side
T3 - Supply water HS
T4 - Return water HS

Friday, March 22, 2013

Test not conducted. Target removed.

Thursday, March 12, 2013 

The CTL was removed and target heated to 580A / 300A

T1: Left target leg close to tube
T2: Heat Shield above CTL
T3: Heat Shield cooling water Supply
T4: Heat Shield cooling water Return

Thursday, March 13, 2013  

The target was cooled down 

Results attached as PDF and Excel

Target installed with 4 T/C

The target assembly is ITD0300 with the CTL Cu cooling block slightly modified.

Ch1 - CTL cooling block T/C feedtrough
Ch2 - Heat shield below left gripper arm - T/C feedthrough
Ch3 - Heat shield below left gripper arm - 9 pin connector
Ch4 - Target left side leg on tube - 9 pin connector

Friday, April 19, 2013, 15:23: Roughing

Friday, April 19, 2013, 15:41: Started turbo

Monday, April 22, 2013, 09:43: Opened water supply. Vacuum stable at 2.8E-7 T (IGP1)

Tuesd ay, April 23, 2013, 10:07

TBHT / TGHT: 820A / 300A

TGHT:RDCUR: 816.6A
TBHT:RDCRU: 303.5A

Local P/S displays
TGHT: 821A / 11.05V
TBHT: 307A / 4.37V

Tuesday, April 23, 2013, 10:45: Ramping down TBHT to 0A @ 5A/min

Tuesday, April 23, 2013, 12:49: Ramping down TGHT to 0A @ 5A/min

Tuesday, April 23, 2013, 15:52: Swithced off TGHT and TBHT P/S. TGHT P/S showed 30A read back value, while local value was 0A

 Wednesday, April 24, 2013, 09:53: Turbo stopped

Wednesday, April 24, 2013, 12:00: Target removed 

The ionizer tube was found to have deformed as seen in the attached photo.

 CTL block on T/C F/T Ch 1
Supply on Ch 3
HS Return on Ch 4

Tuesday, April 30, 2013, 11:20: Roughing

Tuesday, April 30, 2013, 11:45: Turbo started

Wednesday, May 01, 2013, 08:43: Cooling water opened. Vacuum stable at 5.1E-7 T (IGP1)

Wednesday, May 01, 2013, 08:48: Ramping TGHT and TBHT to 850A and 300A at 1A/60s

Thursday, May 02, 2013, 09:10: TGHT reached voltage limit (12V) at ~780A yesterday at ~10pm. Increased limit to 12.5V and continued auto ramping. CTL block temp ~80C

Thursday, May 02, 2013, 10:08: TGHT voltage limit changed to 13V. TGHT:RDCUR goes to ~810A with TGHT:RDVOL at 12.5V. CTL block temp ~80C

Thursday, May 02, 2013, 11:33: TGHT manually stepped to 850A RDCUR at 846A, RDVOL at 13.1V. CTL block temp ~84C

Thursday, May 02, 2013, 15:13: Ramping down TGHT and TBHT to 580A and 280A at 2A/min and 1A/min

Friday, May 03, 2013, 08:30:  TGHT and TBHT at 580A and 280A. CTL block temp ~60C 

Friday, May 03, 2013, 08:37: Ramping down TGHT and TBHT to 0 at 2/min and 1A/min

Friday, May 03, 2013, 11:04: T/C logger removed

Monday, May 06, 2013, 09:37: Turbo stopped.

Monday, May 06, 2013, 10:26: Venting

 Tuesday, October 29, 2013, 15:50: Pumping down

Wednesday, October 30, 2013, 09:32: Turbo started

Wednesday, October 30, 2013, 14:50: The Cu-bars were heated to 600A and 300A for TGHT and TBHT respectively.

Wednesday, October 30, 2013, 15:17: PS off. Turbo off.

Results can be found on DocuShare and in the attached plot.

The source of the poor vacuum in the backing line seems to be related to a dirty filter. We will try to find a replacement filter next week.

The problem seem to have started September 17th, when backing preassure CG1A went from 40 mTorr to 130 mTorr. CG1B remained around 30 mTorr.

With the help of Anthony Ip from vacuum group, the problem was diagnosed to be the roughing pump itself. The pump was replaced and pumping improved. The chamber can now be evacuated and turbo ready to start in less than 10 minutes.

The filter is not stocked by vacuum group and could not be replaced.

Last week parts of the roughing line was cleaned by Rick. The PVC roughing line has been replaced with a SST bellows. The SST bellows is KF25 and should be replaced by a KF40 bellows in the long run.

See attached photo.

The Heat Shield has been taken to the Machine Shop for repair.

Friday, November 08, 2013

 The Heat Shield cooling line has been repaired and the lid re-installed in the evaporator. Photo attached.

Friday, November 08, 2013, 10:58 : Roughing Started

Friday, November 08, 2013, 11:05: Turbo started 

Friday, November 08, 2013, 11:15: Turbo at speed Vacuum at (IGP1) 5.7E-5 T 

There was no signal going from the coils to the PLC. After manipulating the connection points on the coil a signal could again be established. Frequency is ~ 40Hz.

John Wong wrote:

Thursday, October 02, 2014, 11:22 It was found that after the last process, Evap#2 has broken insulators - the cylinder insulator that supports the target centre legs and the block insulator that supports the terminals.   Informed Anders/Rick.

 Friday, October 03, 2014

• Insulators replaced. Torque 55 in lbs on all fasteners.
• Cleaned TGHT terminals with scotch-brite and methanol.
•  New (clean) heat shield prepared WO-39230-2.
• Re-installed right side heat shield alignment pin (previously removed to allow line of sight to the target).

 Wednesday, January 14, 2015, 13:46: Roughing

Wednesday, January 14, 2015, 14:57: Starting turbo

Monday, January 19, 2015, 13

Water opened up to one circuit at at time. No response on the vacuum could be seen.

IGP1 at 1.7E-7 T

IGP2 at 3E-8 T

Tuesday, January 20, 2015, 13:11: Stopped turbo and roughing pump.

Wednesday, January 21, 2015, 15:46: Venting

Rick and Anders found CG1A to be reading too high a value. A borrowed gauge from the vacuum group confirmed this. A new gauge will be installed

Thursday, January 22, 2015, 14:06: Roughing

Thursday, January 22, 2015, 14:18: Venting

The reading is consistent between CG1A and CG1B, which simplifies pump down.

 See previous e-log entry for details

 Data from thermocouple attached. Raw data and Excel sheet with plot.

Laura Lambert wrote:

Aurelia Laxdal wrote: Started Ta#47 heating at Evap2 using the autoramp program. The TGHT current is setup to go to 300A (for now) and the TBHT to 230A (final value).  Monday, March 14, 2016, 09:20 One thermocouple was not welded on correctly and is not working.  Cooling evap2 back down, to remove target and re-weld thermocouple. Once thermocouple replaced, will ramp back up and continue with tests/ conditioning of target.

 Monday, March 14, 2016, 13:12: Stopped turbo pump

John Wong wrote:

Aurelia Laxdal wrote: Aurelia Laxdal wrote: Aurelia Laxdal wrote: Aurelia Laxdal wrote: Anders Mjos wrote: Laura Lambert wrote: Aurelia Laxdal wrote: Started Ta#47 heating at Evap2 using the autoramp program. The TGHT current is setup to go to 300A (for now) and the TBHT to 230A (final value).  Monday, March 14, 2016, 09:20 One thermocouple was not welded on correctly and is not working.  Cooling evap2 back down, to remove target and re-weld thermocouple. Once thermocouple replaced, will ramp back up and continue with tests/ conditioning of target.    Monday, March 14, 2016, 13:12: Stopped turbo pump  After EVAP2 was vented the thermocouple problem was fixed: it was the wire at on connector inside the box not making proper contact. The lid of the heat shield was also replaced since the one initially mounted had no holes, so one couldn't see the center block. Restarted pumping down at 4:30pm. Just started again the autoramp program: TGHT set to 300A (for the time being) and TBHT to 230A. Temperature measurements will resume tomorrow morning.  Raised the TGHT at 620A. The TBHT was already set at 230A. The temperature is at 1902 deg C. As per John's instructions the target will condition at these setpoints over the week-end. Today, lowered the TGHT from 620A (at 1894 deg C) to 300A.  TBHT is still at 230A.  Cooling down the target.   Thursday, March 24, 2016, 11:29  Target was removed from the Evaporator.   The thermocouples broke off.   Need to insert Re foil prior to installing

 Tuesday, April 19, 2016, 09:28: Uploaded thermoucouple data.

 Dan made a set of new cooling lines for the Source Tray Heat Shield cooling yesterday. No joints on the lines. Use same VCR fitting 3/8 -> 1/4" as for the Heat Shield. The old lines had worn threads on the male VCR nut.

 Dave Morris did a remote restart of the IOC after the outage. Turbo pump started.