Monday, April 08, 2013, 17:39

Target container is coated with TaC; the container will be used for the UCx#6 target. 

No Ta-heat shields are used.

For the sintering process:

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

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

Chamber has been pumped down.  HS cooling H2O valve opened; no leaks have detected.

Thursday, April 11, 2013, 14:35 

Target and tube heaters have reached to optimum.

Auto-cooling initiated...

 Friday, April 12, 2013, 11:17

P/S off.  Chamber vented. 

Done!

Monday, July 22, 2013, 15:00

Target container is coated with TaC - this container will be used for UCx#7.

Container is wrapped with 3 layers of Ta, including the back-block.

For the sintering process:

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

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

Chamber has been pumped down.  HS cooling H2O valves are opened, and no leaks are detected. 

Currently IGP1 @ 7.03e-6 Torr. 

 Monday, July 22, 2013, 15:19

TGHT/TBHT was stepped up to 20A.  Pressure increased to ~1.2e-5 Torr.

Auto-ramping initiated...

 Wednesday, July 24, 2013, 18:40

TGHT and TBHT have reached to 580A/230A, respectively.  Target has been heated for ~4 hours at that max current.

Vacuum currently at 1.65e-6 Torr.

Auto-cooling initiated... (TGHT @ -1A/min, TBHT -0.5A/min)

Target will be vented in air tomorrow.

Friday, October 04, 2013, 15:37

A LP target container is coated with TaC.  The container is wrapped with 3 layers to heat shield.  

This container will be used for the graphite tube test.  

Chamber is being pumped down.

 The HS cooling water valves are open and no leaks are detected. 

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

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

The temperature will be monitored and measured. 

 Sunday, October 06, 2013, 19:55

Tuesday, October 22, 2013, 16:49

The target was heated up to 580A and the temperature inside the tube was measured to be ~1800C and the outside surface was ~1400C.

The target was cooled down.  Then the graphite tube was inserted.

There are two thermcouples inserted inside the tube on both ends.

Chamber has been pumped down to 4.33 e-7 Torr.  No leaks were detected.

Target will be heated up again to TGHT @ 580A / TBHT @ 230A at 0.2A/min.

The temperatures will be monitored.

T1 = left (floating)

T2 = right (toughing C-grv tube)

(wtf ionizer pointing into the page).

 Thursday, October 24, 2013, 16:35

TGHT/TBHT reached to 580A/230A. 

T1 = 1642C

T2 = Error?? Reading goes on/off intermittently, showing 900 - 1900C

Thursday, October 24, 2013, 16:45 

Ramping up TGHT to 680A to see if T1 can reach 1700C.

IG1 currently at 5.2e-7 Torr.

 Friday, October 25, 2013, 12:30

TGHT was ramped up to 632A (stopped due to voltage limiting). 

T1 was measured at 1960C.  Vac went up as it was heated up.  (see attachment #2)

Target was cooled down at 5A/min, now at 0A.

The chamber will be vented and the target will be inspected.

This run is complete.

 Wednesday, January 15, 2014, 17:30

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.  Tomorrow, the HS water valve can be opened to test for leaks.  

Notes: 

If everything is fine, TGHT/TBHT can be stepped up to 30A-50A.  Watch for the vacuum; once it's stable the auto ramping program can be initiated.  

Once TGHT/TBHT reached above 200A, the ramping rate for TGHT can be increased up to 2A/min.  (This step is to speed up the process; however it's not mandatory) 

John Wong wrote:

Wednesday, January 15, 2014, 17:30 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.  Tomorrow, the HS water valve can be opened to test for leaks.   Notes:  If everything is fine, TGHT/TBHT can be stepped up to 30A-50A.  Watch for the vacuum; once it's stable the auto ramping program can be initiated.   Once TGHT/TBHT reached above 200A, the ramping rate for TGHT can be increased up to 2A/min.  (This step is to speed up the process; however it's not mandatory)

 Thursday, January 16, 2014, 11:35

Chamber was pumped down overnight to 10-7 Torr. HS water valve was opened and no leak in vacuum was observed.

TGHT and TBHT were stepped up to 35A. Waited ~30min, current stabilized and vacuum starting to drop.

Initiating auto-ramping: Good Vac = 2.0e-5 Torr, Bad Vac = 3.0e-5 Torr.

Laura Lambert wrote:

John Wong wrote:  Wednesday, January 15, 2014, 17:30 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.  Tomorrow, the HS water valve can be opened to test for leaks.   Notes:  If everything is fine, TGHT/TBHT can be stepped up to 30A-50A.  Watch for the vacuum; once it's stable the auto ramping program can be initiated.   Once TGHT/TBHT reached above 200A, the ramping rate for TGHT can be increased up to 2A/min.  (This step is to speed up the process; however it's not mandatory)     Thursday, January 16, 2014, 11:35 Chamber was pumped down overnight to 10-7 Torr. HS water valve was opened and no leak in vacuum was observed. TGHT and TBHT were stepped up to 35A. Waited ~30min, current stabilized and vacuum starting to drop. Initiating auto-ramping: Good Vac = 2.0e-5 Torr, Bad Vac = 3.0e-5 Torr.

 Friday, January 17, 2014, 09:28

TGHT/TBHT @ 300/200A.  TBHT voltage is limited at 3A.  

TGHT ramping rate increased to 2A/min.  Pressure @ 4.5e-7 Torr.  

John Wong wrote:

Laura Lambert wrote: John Wong wrote:  Wednesday, January 15, 2014, 17:30 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.  Tomorrow, the HS water valve can be opened to test for leaks.   Notes:  If everything is fine, TGHT/TBHT can be stepped up to 30A-50A.  Watch for the vacuum; once it's stable the auto ramping program can be initiated.   Once TGHT/TBHT reached above 200A, the ramping rate for TGHT can be increased up to 2A/min.  (This step is to speed up the process; however it's not mandatory)     Thursday, January 16, 2014, 11:35 Chamber was pumped down overnight to 10-7 Torr. HS water valve was opened and no leak in vacuum was observed. TGHT and TBHT were stepped up to 35A. Waited ~30min, current stabilized and vacuum starting to drop. Initiating auto-ramping: Good Vac = 2.0e-5 Torr, Bad Vac = 3.0e-5 Torr.    Friday, January 17, 2014, 09:28 TGHT/TBHT @ 300/200A.  TBHT voltage is limited at 3A.   TGHT ramping rate increased to 2A/min.  Pressure @ 4.5e-7 Torr.

 Friday, January 17, 2014, 10:14

TBHT stopped at 200A with voltage limit sitting at 3V.

Aborted auto-ramp, changed the voltage limit to 5V and increased ramping rate to 2A/min. Re-started auto-ramp.

IGP1 @ 5.0e-7 Torr

Laura Lambert wrote:

John Wong wrote: Laura Lambert wrote: John Wong wrote:  Wednesday, January 15, 2014, 17:30 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.  Tomorrow, the HS water valve can be opened to test for leaks.   Notes:  If everything is fine, TGHT/TBHT can be stepped up to 30A-50A.  Watch for the vacuum; once it's stable the auto ramping program can be initiated.   Once TGHT/TBHT reached above 200A, the ramping rate for TGHT can be increased up to 2A/min.  (This step is to speed up the process; however it's not mandatory)     Thursday, January 16, 2014, 11:35 Chamber was pumped down overnight to 10-7 Torr. HS water valve was opened and no leak in vacuum was observed. TGHT and TBHT were stepped up to 35A. Waited ~30min, current stabilized and vacuum starting to drop. Initiating auto-ramping: Good Vac = 2.0e-5 Torr, Bad Vac = 3.0e-5 Torr.    Friday, January 17, 2014, 09:28 TGHT/TBHT @ 300/200A.  TBHT voltage is limited at 3A.   TGHT ramping rate increased to 2A/min.  Pressure @ 4.5e-7 Torr.      Friday, January 17, 2014, 10:14 TBHT stopped at 200A with voltage limit sitting at 3V. Aborted auto-ramp, changed the voltage limit to 5V and increased ramping rate to 2A/min. Re-started auto-ramp. IGP1 @ 5.0e-7 Torr

 Friday, January 17, 2014, 12:45

TGHT voltage limiting at 9.9V, and  current stayed at 560A.  Increased the TGHT voltage to 10.5V and continued ramping the heater up.

TGHT/TBHT stabilized at 580A (~10V) and 230A(3.6V). 

Pressure at 1.03e-6 Torr and coming down... 

Target will be heated until 5pm (4hrs) before cooling down at the ramping rate of 2A/min. 

Chamber will be vented in air, next week.

 Friday, January 17, 2014, 16:51

Auto-cooling initiated at 2A/min.

Vac @ 5.3e-7 Torr.

John Wong wrote:

Laura Lambert wrote: John Wong wrote: Laura Lambert wrote: John Wong wrote:  Wednesday, January 15, 2014, 17:30 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.  Tomorrow, the HS water valve can be opened to test for leaks.   Notes:  If everything is fine, TGHT/TBHT can be stepped up to 30A-50A.  Watch for the vacuum; once it's stable the auto ramping program can be initiated.   Once TGHT/TBHT reached above 200A, the ramping rate for TGHT can be increased up to 2A/min.  (This step is to speed up the process; however it's not mandatory)     Thursday, January 16, 2014, 11:35 Chamber was pumped down overnight to 10-7 Torr. HS water valve was opened and no leak in vacuum was observed. TGHT and TBHT were stepped up to 35A. Waited ~30min, current stabilized and vacuum starting to drop. Initiating auto-ramping: Good Vac = 2.0e-5 Torr, Bad Vac = 3.0e-5 Torr.    Friday, January 17, 2014, 09:28 TGHT/TBHT @ 300/200A.  TBHT voltage is limited at 3A.   TGHT ramping rate increased to 2A/min.  Pressure @ 4.5e-7 Torr.      Friday, January 17, 2014, 10:14 TBHT stopped at 200A with voltage limit sitting at 3V. Aborted auto-ramp, changed the voltage limit to 5V and increased ramping rate to 2A/min. Re-started auto-ramp. IGP1 @ 5.0e-7 Torr  Friday, January 17, 2014, 12:45 TGHT voltage limiting at 9.9V, and  current stayed at 560A.  Increased the TGHT voltage to 10.5V and continued ramping the heater up. TGHT/TBHT stabilized at 850A (~10V) and 230A(3.6V).  Pressure at 1.03e-6 Torr and coming down...  Target will be heated until 5pm (4hrs) before cooling down at the ramping rate of 2A/min.  Chamber will be vented in air, next week.  Friday, January 17, 2014, 16:51 Auto-cooling initiated at 2A/min. Vac @ 5.3e-7 Torr.

 Friday, January 31, 2014, 11:28

Target container is coated with TaC.

The container is wrapped with 3 x Ta heat-shield.

Chamber was pumped down to 1.9e-7 Torr.

HS water valves were opened, no leak detected.

TGHT and TBHT were stepped up to 35A. Waited ~20min, current stabilized and vacuum starting to drop.

TGHT will be ramped up to 580A at 0.2A/min, max voltage = 11.05V.

TBHT will be ramped up to 230A at 0.2A/min, max volatge = 5V.

Initiating auto-ramping: Good Vac = 3.0e-5 Torr, Bad Vac = 4.0e-5 Torr.

 Monday, February 03, 2014, 10:21

TGHT reached 580A pver the weekend.

TBHT sitting at 1.4A, checked archive: never went over 1.6A. Aborted auto-ramp, re-starting auto ramp process for TBHT.

IGP1 = 1.6e-7 Torr.

 Monday, February 03, 2014, 15:23

TBHT running smoothly, must have been and electrical problem.

TBHT currently at 85A, vacuum has not changed, increasing TBHT auto-ramp to 2.0A/min

 Tuesday, February 04, 2014, 10:10

TBHT reached 230A yesterday pm. Measured temp this morning at 1800C.

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

 Wednesday, February 05, 2014, 11:33

Chamber cooled down overnight, vented and opened up this morning.

Smooth run! Container fully sintered.

 Friday, June 13, 2014, 14:53

Container is filled with 400 discs of Ta foils; target length = 5.2cm;

Total mass ( Ta foils + wire) = 45.92g

No Ta foil heat shield.

No caps inserted.

Chamber pumped down this morning.

HS cooling water valves opened, no leaks detected.

IG @ 5.8e-6 Torr.

TGHT max = 580A

TBHT max = 230A

Ramping rate 0.2A/min.

 Monday, June 16, 2014, 11:46

TGHT and TBHT reached their respective 580A and 230A over the weekend.

IGP1 currently at 3.2e-7 Torr.

Internal temp [measured using mikron, right side of EVAP2, pointed at discs inside] = 1375C

Laura Lambert wrote:

Friday, June 13, 2014, 14:53 Container is filled with 400 discs of Ta foils. No Ta foil heat shield. No caps inserted. Chamber pumped down this morning. HS cooling water valves opened, no leaks detected. IG @ 5.8e-6 Torr. TGHT max = 580A TBHT max = 230A Ramping rate 0.2A/min.  Monday, June 16, 2014, 11:46 TGHT and TBHT reached their respective 580A and 230A over the weekend. IGP1 currently at 3.2e-7 Torr. Internal temp [measured using mikron, right side of EVAP2, pointed at discs inside] = 1375C

 Monday, June 16, 2014, 17:21

Further stepping up TGHT to 650A.

Temperature measured on target discs = 1542C. Vac @ 3.28e-7 Torr.

Initiate cooling down process; 2A/min for TGHT; 1A/min for TBHT

John Wong wrote:

Laura Lambert wrote:  Friday, June 13, 2014, 14:53 Container is filled with 400 discs of Ta foils. No Ta foil heat shield. No caps inserted. Chamber pumped down this morning. HS cooling water valves opened, no leaks detected. IG @ 5.8e-6 Torr. TGHT max = 580A TBHT max = 230A Ramping rate 0.2A/min.  Monday, June 16, 2014, 11:46 TGHT and TBHT reached their respective 580A and 230A over the weekend. IGP1 currently at 3.2e-7 Torr. Internal temp [measured using mikron, right side of EVAP2, pointed at discs inside] = 1375C    Monday, June 16, 2014, 17:21 Further stepping up TGHT to 650A. Temperature measured on target discs = 1542C. Vac @ 3.28e-7 Torr. Initiate cooling down process; 2A/min for TGHT; 1A/min for TBHT

 Tuesday, June 17, 2014, 10:08

TGHT and TBHT reached 0A last night.

Turned off EVAP2

Venting chamber

Process Complete

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

 Monday, July 28, 2014, 14:41

Total number of foils: 445 discs

Total mass of materials [incl graphite foils]: 49.027 g

Total length packed: 11.2 cm

Container has no Ta heat shields.

Currently being pumped down.

Laura Lambert wrote:

Monday, July 28, 2014, 14:41 Total number of foils: 445 discs Total mass of materials [incl graphite foils]: 49.027 g Total length packed: 11.2 cm Container has no Ta heat shields. Currently being pumped down.

 Tuesday, July 29, 2014, 11:19

Chamber was pumped down overnight to ~5.5e-7 torr.

HS water valve opened; no leaks were detected.

Stepped up TGHT/TBHT to 40A. IG went up 8e-6 Torr and stabilized. 

Initiated auto-ramping TGHT @ 580A, TBHt @ 230A at 0.2A/min

The maximum current of 580A was reached at 9:15.

TGHT:RDCUR 578 A

TGHT:RDVOL 9.87 V

IGP1:RDVAC 3.8e-6

The temperature was measured with the Minolta 2-color pyrometer:

from the side - inside target container : ~1200 deg C

from the front trough hole in the heat shield : ~1800 deg C

Target was conditioned for 4 hours at 580A.

Initiating ramp-down sequence @ 2A/min

Peter Kunz wrote:

Target was conditioned for 4 hours at 580A. Initiating ramp-down sequence @ 2A/min

 Tuesday, August 05, 2014, 12:00

target vented in air and taken out this morning