Tuesday, February 11, 2014, 13:43

Target container is coated with TaC and wrapped with 3-Ta heat shields.

TGHT and TBHT will be ramped up to 820A and 300A, respectively.

Ramping rate set to 0.2A/min.

Good vac = 3e-5 Torr, Bad vac = 4e-5 Torr.

Chamber currently being pumped down...

 Tuesday, February 11, 2014, 16:33

Chamber pumped down to 2e-6 Torr.

HS cooling water valves opened; no leaks detected.

Will step up in the a.m.

 Wednesday, February 12, 2014, 11:41

IGP1 = 1.5e-7 Torr

TGHT max voltage = 17.05V, TBHT max voltage = 5V

Stepped TGHT and TBHT up to 35A

Waited 1hr15 before vacuum stabilized/ started to drop.

Initiating auto-ramping.

 Thursday, February 13, 2014, 10:19

TBHT and TGHT have both reached 300A

IGP1 = 2.4e-7 Torr.

Increasing TGHT auto-ramp to 2.0A/min

 Friday, February 14, 2014, 08:58

TGHT reached 820A yesterday afternoon. Measured internal temp this morning at 1300C.

Initiated TGHT auto-cooling at 2.0A/min and TBHT at 1.0A/min.

IGP1 = 3.2e-7 Torr.

 Monday, February 17, 2014, 12:02

Cooled down friday. Vented this morning.

Container fully sintered, smooth run!

 Tuesday, February 18, 2014, 12:12

A new target boat was sprayed with TaC coating and let dry.
The target boat is NOT wrapped with Ta-heat shield.

Thermocouples have been attached to the target boat in order to monitor the internal temperature of the new target boat design. 

The boat was installed in Evap#2, chamber is currently being pumped down.

 Tuesday, February 18, 2014, 14:20

Chamber was pumped down this morning to 2.9e-6 Torr. HS cooling water valves were opened, no leaks detected.

TGHT was stepped up to 35A, voltage max set at 14V. TBHT currently at 0A.

Waited ~20min, current stabilized, vacuum started to drop, auto-ramp initiated at 0.2A/min and max setpoint to 700A.

Good vacuum: 3.00e-5 Torr; Bad vacuum: 4.00e-5 Torr.

Temperature reading on left: thermocouple touching edge of target boat; temperature reading on right: thermocouple floating in center of target boat.

 Wednesday, February 19, 2014, 09:11

TGHT has been slowly ramping up overnight at a rate of 0.2A/min

IGP1 = 3.9e-7 Torr, TGHT = 260A; stepping ramping rate up to 2.0A/min

 Wednesday, February 19, 2014, 15:25

IGP1 = 9.4e-7 Torr

Thermocouple T2 = 1267.8C

Internal temp measured with Mikron = 1600C

Increasing max setpoint to 720A due to previous not fully sintered new design of target boat.

 Thursday, February 20, 2014, 09:17

Thermocouple T2 = 1254.5C

Internal temp measured with Mikron = 1811C

IGP1 = 2.6e-7 Torr

Reached max setpoint yesterday evening.

Initiating auto-cooling at 2.0A/min.

 Friday, February 21, 2014, 10:47

Vented and opened chamber this morning.

Target boat not fully sintered. [see attached photos]

Close to a full sinter, and will re-sinter next week with endcaps, so will not re-sinter by itself.

 Tuesday, June 17, 2014, 13:11

Target container is coated with TaC.

Container is wrapped with 3x Ta-heat shields.

Currently being pumped down.

For sintering process:

TGHT and TBHT will be ramped up to 820A and 300A respectively at 0.1A/min

 Tuesday, June 17, 2014, 14:22

HS water cooling valves opened, no leaks detected.

IGP1 @1.8e-6 Torr

TGHT max = 820A/ 17V

TBHT max = 300A/ 5V

Stepped up manually to 40A, waited ~20min, vacuum stable.

Initiating auto-ramp @ 1.0A/min

 Wednesday, June 18, 2014, 11:24

TGHT and TBHT reached their respective 820A and 300A last night.

Internal temp measured from side of EVAP2 with mikron = 1830C

IGP1 = 7.6e-7 Torr

Initiating auto-cool down process at 2.0A/min and 1.0A/min for TGHT and TBHT respectively

vented and opened this morning.

smooth run

Wednesday, July 23, 2014, 15:07

Target container is coated with TaC.  No Ta-heat shields are used.

TGHT will be ramped up to 580A at 0.2A/min.

TBHT will be ramped up to 230A at 0.2A/min.

Chamber is currently being pumped down

 Wednesday, July 23, 2014, 17:40

Vacuum came down to mid 10-6 Torr.

Stepped up TGHT and TBHT to 30A - IG1 @ 1.4e-5 Torr.

Initiated auto-ramping.

 Thursday, July 24, 2014, 17:19

TGHT and TBHT have reached to 100A, and vacuum is coming down to 1.4e-6 Torr.

Increase ramping rate, TGHT to 1A/min, TBHT 0.5A/min.

 Friday, July 25, 2014, 11:26

Target container temperature reaches ~1550C at 580A on TGHT and 230A TBHT, and it has been heated for ~10 hrs.

Auto-cooling initiated at 2A/min.

John Wong wrote:

Wednesday, July 23, 2014, 15:07 Target container is coated with TaC.  No Ta-heat shields are used. TGHT will be ramped up to 580A at 0.2A/min. TBHT will be ramped up to 230A at 0.2A/min. Chamber is currently being pumped down  Wednesday, July 23, 2014, 17:40 Vacuum came down to mid 10-6 Torr. Stepped up TGHT and TBHT to 30A - IG1 @ 1.4e-5 Torr. Initiated auto-ramping.  Thursday, July 24, 2014, 17:19 TGHT and TBHT have reached to 100A, and vacuum is coming down to 1.4e-6 Torr. Increase ramping rate, TGHT to 1A/min, TBHT 0.5A/min.  Friday, July 25, 2014, 11:26 Target container temperature reaches ~1550C at 580A on TGHT and 230A TBHT, and it has been heated for ~10 hrs. Auto-cooling initiated at 2A/min.

 Monday, July 28, 2014, 10:50

vented in air and opened this morning. successful run

 Tuesday, August 05, 2014, 12:02

The target container end caps were coated with TaC spray and let dry.

The caps are inserted in the target boat vertically, wrapped in graphite foil with 3 x Ta-heat shield. [see attached photo]

The chamber is currently being pumped down.

 Tuesday, September 23, 2014, 15:00

A new target boat [new design with no end caps] was sprayed with TaC coating and let dry.

The target boat is wrapped with 3-layers of Ta-heat shield.

The boat was installed in EVAP2, chamber is currently being pumped down.

Laura Lambert wrote:

Tuesday, September 23, 2014, 15:00 A new target boat [new design with no end caps] was sprayed with TaC coating and let dry. The target boat is wrapped with 3-layers of Ta-heat shield. The boat was installed in EVAP2, chamber is currently being pumped down.

 Tuesday, September 23, 2014, 18:31

Chamber was pumped down to 2.5e-6 Torr. 

HS water valve open; no leaks detected.

Stepping up TGHT to 40A - pressure is increasing...

 Tuesday, September 23, 2014, 19:05

Auto-ramping TGHT to 580A at 0.5A/min.  Temperature will be measured and TGHt will be adjusted accordingly.

 Wednesday, September 24, 2014, 11:57

Pressure is stable at 2.2-6 Torr as TGHT is ramping up.  Increase ramping rate to 2.0A/min.  Currently TGHT at 540A.

 Wednesday, September 24, 2014, 15:36

TGHT at 580A for 2 hrs.  Inner tube temp (left side wall, viewing from the window port) ~1800C (measured with Mikron = 1550C +250C em. correction); Vac @ 1.67e-6 Torr.

Temperature measurement distance from the window to Mikron = 45cm.

Increase TGHT to reach 2000C (Mikron @ 1750C)

 Wednesday, September 24, 2014, 18:14

TGHT has gone up to 725A/13.2V.  Temp measured at 1740C (+250C = ~2000C).  Pressure gone up to 5.5e-6 Torr and it's coming down slowly.

Will continue heating at this temperature for a few hours; then cool down afterward.

 Wednesday, September 24, 2014, 18:56

Temperature is pretty stable at 1740C on Mikron, and pressure is still coming down, currently at 2.9e-6 Torr.

Slow ramping down TGHT at 1.0A/min.  The chamber should be ready for venting tomorrow. 

Target boat will be inspected.

 Thursday, September 25, 2014, 17:25.

The boat was inspected and it turned out great!  The coating was fully sintered and there is no sign of damage on the boat. 

See the link for photos.

https://www.dropbox.com/sh/m7ycqhkj4avfull/AABHVTweTsP4ajeWZ6uoY010a?dl=0

 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.

 Thursday, October 02, 2014, 11:51

Target container sprayed with TaC, currently drying in fume hood

 Monday, October 06, 2014, 12:11

Target container & back block is wrapped with 3 layers of Ta-heat shield.  The chamber has been pumped down over the weekend. 

Pressure currently at 2.23e-7 Torr. 

HS water valves open; no leaks detected.

TGHT will be ramped up to 580A at 0.2A/min

TBHT will be ramped up to 230A at 0.2A/min.

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).

Laura Lambert wrote:

Thursday, October 02, 2014, 11:51 Target container sprayed with TaC, currently drying in fume hood  Monday, October 06, 2014, 12:11 Target container & back block is wrapped with 3 layers of Ta-heat shield.  The chamber has been pumped down over the weekend.  Pressure currently at 2.23e-7 Torr.  HS water valves open; no leaks detected. TGHT will be ramped up to 580A at 0.2A/min TBHT will be ramped up to 230A at 0.2A/min.

 Monday, October 06, 2014, 12:16

Stepped up both TGHT/TBHT to 35A. 

Tuesday, October 07, 2014, 12:54

TBHT reached to 230A/3.7V and TGHT is still ramping up, currently at 303A/4.5V. Temp measured with Omega-IR2 = 1165C with e'=0.85

Pressure @ 5.2e-7 Torr. 

Increase ramping rate to 2A/min.

 Tuesday, October 07, 2014, 16:21

TGHT is now at 580A and TGHT at 230A.

Temperature is measured with OMEGA-IR2, MIKRON, and analog pyrometer - All the measurements are agreed at 1700C (without the tantalum emissivity correction of 250C)

The OMEGA-IR2 slope has changed to 0.97 for the correction - The real temperature reading from the display is showing 1935C.

Now... attempting to low TBHT to see any temperature change.

 Tuesday, October 07, 2014, 17:01

TGHT @ 580A.

TBHT = 180C, Temp = 1925C

TBHT = 130C, Temp = 1920C

Not much of change in the temperature on the target tube...

Tuesday, October 07, 2014, 17:07

Attempting to increase the temperature to 2000C

TGHT = 600A, Temp = 1955C

TGHT = 620A, Temp = 2000C

Target will continue heating at this temperature overnight... Will continue to monitor.

 Tuesday, October 07, 2014, 20:59

After almost 4 hours of heating at 620A on TGHT, the temperature has dropped to 1980C.  

Pressure is coming down to 1.17e-6 Torr.  

Increased TGHT to 630A to maintain temp @ 2000C

John Wong wrote:

Laura Lambert wrote:  Thursday, October 02, 2014, 11:51 Target container sprayed with TaC, currently drying in fume hood  Monday, October 06, 2014, 12:11 Target container & back block is wrapped with 3 layers of Ta-heat shield.  The chamber has been pumped down over the weekend.  Pressure currently at 2.23e-7 Torr.  HS water valves open; no leaks detected. TGHT will be ramped up to 580A at 0.2A/min TBHT will be ramped up to 230A at 0.2A/min.    Monday, October 06, 2014, 12:16 Stepped up both TGHT/TBHT to 35A.  Tuesday, October 07, 2014, 12:54 TBHT reached to 230A/3.7V and TGHT is still ramping up, currently at 303A/4.5V. Temp measured with Omega-IR2 = 1165C with e'=0.85 Pressure @ 5.2e-7 Torr.  Increase ramping rate to 2A/min.  Tuesday, October 07, 2014, 16:21 TGHT is now at 580A and TGHT at 230A. Temperature is measured with OMEGA-IR2, MIKRON, and analog pyrometer - All the measurements are agreed at 1700C (without the tantalum emissivity correction of 250C) The OMEGA-IR2 slope has changed to 0.97 for the correction - The real temperature reading from the display is showing 1935C. Now... attempting to low TBHT to see any temperature change.  Tuesday, October 07, 2014, 17:01 TGHT @ 580A. TBHT = 180C, Temp = 1925C TBHT = 130C, Temp = 1920C Not much of change in the temperature on the target tube... Tuesday, October 07, 2014, 17:07 Attempting to increase the temperature to 2000C TGHT = 600A, Temp = 1955C TGHT = 620A, Temp = 2000C Target will continue heating at this temperature overnight... Will continue to monitor.  Tuesday, October 07, 2014, 20:59 After almost 4 hours of heating at 620A on TGHT, the temperature has dropped to 1980C.   Pressure is coming down to 1.17e-6 Torr.   Increased TGHT to 630A to maintain temp @ 2000C

 Wednesday, October 08, 2014, 11:46

Temperature readout from omega-IR2C = 2054C

TGHT = 11.14V, 628.0A

TBHT = 2.01V, 129.8A

IGP1 = 8.2e-7Torr

Initiating auto-cool for TGHT @ 2A/min, TBHT @ 1A/min

 Thursday, October 09, 2014, 16:00

vented in air and opened up this morning

target container looks good!

Laura Lambert wrote:

John Wong wrote: Laura Lambert wrote:  Thursday, October 02, 2014, 11:51 Target container sprayed with TaC, currently drying in fume hood  Monday, October 06, 2014, 12:11 Target container & back block is wrapped with 3 layers of Ta-heat shield.  The chamber has been pumped down over the weekend.  Pressure currently at 2.23e-7 Torr.  HS water valves open; no leaks detected. TGHT will be ramped up to 580A at 0.2A/min TBHT will be ramped up to 230A at 0.2A/min.    Monday, October 06, 2014, 12:16 Stepped up both TGHT/TBHT to 35A.  Tuesday, October 07, 2014, 12:54 TBHT reached to 230A/3.7V and TGHT is still ramping up, currently at 303A/4.5V. Temp measured with Omega-IR2 = 1165C with e'=0.85 Pressure @ 5.2e-7 Torr.  Increase ramping rate to 2A/min.  Tuesday, October 07, 2014, 16:21 TGHT is now at 580A and TGHT at 230A. Temperature is measured with OMEGA-IR2, MIKRON, and analog pyrometer - All the measurements are agreed at 1700C (without the tantalum emissivity correction of 250C) The OMEGA-IR2 slope has changed to 0.97 for the correction - The real temperature reading from the display is showing 1935C. Now... attempting to low TBHT to see any temperature change.  Tuesday, October 07, 2014, 17:01 TGHT @ 580A. TBHT = 180C, Temp = 1925C TBHT = 130C, Temp = 1920C Not much of change in the temperature on the target tube... Tuesday, October 07, 2014, 17:07 Attempting to increase the temperature to 2000C TGHT = 600A, Temp = 1955C TGHT = 620A, Temp = 2000C Target will continue heating at this temperature overnight... Will continue to monitor.  Tuesday, October 07, 2014, 20:59 After almost 4 hours of heating at 620A on TGHT, the temperature has dropped to 1980C.   Pressure is coming down to 1.17e-6 Torr.   Increased TGHT to 630A to maintain temp @ 2000C    Wednesday, October 08, 2014, 11:46 Temperature readout from omega-IR2C = 2054C TGHT = 11.14V, 628.0A TBHT = 2.01V, 129.8A IGP1 = 8.2e-7Torr Initiating auto-cool for TGHT @ 2A/min, TBHT @ 1A/min  Thursday, October 09, 2014, 16:00 vented in air and opened up this morning target container looks good!

 Thursday, October 09, 2014, 16:36

Photos for the OMEGA-IR2C temp measurement can be found on this link (see also the subfolder for the heating process):

https://www.dropbox.com/sh/n5sxcepg7e847xw/AACMubuKW1idd49D1Nz_0diNa?dl=0

Monday, November 10, 2014, 13:51

target container was sprayed with TaC on friday and sintered over the weekend.
vented and removed from evap2 this morning, looks good.

this container will be used as a round2 for UCx #11 since the last container broke as it was being assembled.

hopefully all the materials can be recovered and re-used/re-loaded into the new container...

 Wednesday, November 19, 2014, 15:10

currently pumping down

 Wednesday, November 19, 2014, 15:28

container is wrapped with 3 x Ta-heat shield

leak check done

Starting voltage = -0.017mV

TGHT = 0A, 0V

TBHT = 0A, 0V

IGP1 = 1.7e-6 Torr

 Wednesday, November 19, 2014, 16:33

Tapped TGHT up manually to 100A

DV [direct voltage] = 0.33V

TGHT = 109A

TBHT = 0A

IGP1 = 1.3e-6 Torr

Initiating auto-ramp of TGHT to 400A at 2A/min

 Thursday, November 20, 2014, 09:49

DV = 3.47V

OMEGA = 1645C

TGHT = 401A, 6.49V

TBHT = 0

IGP1 = 4.5e-7Torr

TGHT finished auto-ramping ~19:00 last night

initiating manual tap up to 2000 celsius or 580A [whichever is higher] and recording activity

 Friday, November 21, 2014, 12:50

TGHT was ramped up to 580A yesterday and left overnight.

In the picture attached one can see the TGHT current has remained constant at 578A [red = TGHT current, green = TGHT voltage]

The vacuum has slowly gone down as expected.

However, the DV, TGHT voltage and temperature have deviated. They have dipped up and down several times throughout the night. The first deviation was observed ~3.5hours after it reached its target of 580A.

DV reached 6.02V [when TGHT initially hit 580A] and increased to 6.27V after 3.5hrs and is currently sitting at 5.94V

OMEGA reached 2111C [when TGHT initially hit 580A] and increased to 2154C after 3.5 hrs and is currently sitting at 2094C

TGHT voltage reached 10.4V [when TGHT initially hit 580A] and increased to 10.6V after 3.5hrs and is currently sitting at 10.3V

 Friday, November 21, 2014, 17:59

EVAP2 sat at max setting: TGHT = 580A and TBHT = 230A for ~4hours

Initiating auto-cool TGHT 2A/min, TBHT 1A/min

 Monday, November 24, 2014, 14:28

Vented and opened this morning.

No notable changes on target container.

[See attachments for more detailed information of results]

 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

Monday, February 02, 2015, 16:28

Container is coated with TaC.  No Ta foil wrapped around. 

Chamber is being pumped down.

TGHT/TBHT will be ramped up to 580A/230A at 0.2A/min.

John Wong wrote:

Monday, February 02, 2015, 16:28 Container is coated with TaC.  No Ta foil wrapped around.  Chamber is being pumped down. TGHT/TBHT will be ramped up to 580A/230A at 0.2A/min.

 Tuesday, February 03, 2015, 10:28

HS water valves opened; no leaks detected.

IGP1 = 5.9e-7 Torr

 Wednesday, February 04, 2015, 11:10

attempted to initiate manual ramp up of TGHT and TBHT yesterday, but not responding to EPICS

currently sitting under vacuum, waiting on fix...

 Wednesday, February 04, 2015, 14:16

controls fixed.

initiated auto-ramp.

 Thursday, February 05, 2015, 08:56

IGP1 = 4.1e-7 Torr

TGHT = 290A

TBHT = 225A

Increasing auto-ramp to 1.0A/min

 Thursday, February 05, 2015, 13:49

IGP1 = 1.4e-6 Torr

TGHT = 569A

TBHT = 232A

Increasing auto-ramp to 2.0A/min