Wednesday, August 21, 2013, 12:28

Container is filled with 400 discs of Ta foils, and wrapped with 3 layers of Ta heat shields.

No caps are inserted during the conditioning. 

Chamber is currently being pumped down. 

 Wednesday, August 21, 2013, 15:54

HS cooling water valves opened, no leaks were detected.

IG @ 2.9e-6 Torr.

Heating setting:

TGHT max = 820A,

TBHT max = 230A

ramping rate 2A/min.

 Thursday, August 22, 2013, 12:45

TGHT/TBHT reached to 820A/230A, respectively. 

So much out-gassing was observed at the max currents.  (see attachment#1).

TGHT/TBHT are ramping down at 4A/min. 

Chamber will be vented in air.

The target will will be inspected.

More info later...

 Thursday, August 22, 2013, 16:44

Target was removed from the evaporator and inspected.

The container and the Ta materials look OK. 

The outgassing could be from the Ta-heat shields; they look burnt and brittle.

Overall, the target is good.

 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, August 06, 2014, 15:59

Target consists of 400 Ta discs. 

Total packed length 4.5cm

Total mass 47.490g.

Re foil inserted.

Wednesday, August 06, 2014, 16:07

Chamber is currently being pumped down.

No Ta heat-shield wrapped (Want to check the temperature without it) 

One end-cap inserted on left (wrt ionizer into the page).

TGHT and TBHT will be ramped up to 820A/230A at 2A/min.

 Wednesday, August 06, 2014, 18:07

Vacuum at 2.3e-6 Torr.  HS water valve opened.  No leaks.

Initiated auto-ramping.

 Thursday, August 07, 2014, 11:39

Target has been heated for 11hrs at TGHT/TBHT = 820A/230A.

Temperature measured with pyrometer:

Target leg = 1600C + (250 correction for e=0.25) = 1850C

Inside target material = dark, temp can't be measured.

Cooling down at 2A/min for TGHT and 1A/min TBHT.

John Wong wrote:

Wednesday, August 06, 2014, 15:59 Target consists of 400 Ta discs.  Total packed length 4.5cm Total mass 47.490g. Re foil inserted. Wednesday, August 06, 2014, 16:07 Chamber is currently being pumped down. No Ta heat-shield wrapped (Want to check the temperature without it)  One end-cap inserted on left (wrt ionizer into the page). TGHT and TBHT will be ramped up to 820A/230A at 2A/min.  Wednesday, August 06, 2014, 18:07 Vacuum at 2.3e-6 Torr.  HS water valve opened.  No leaks. Initiated auto-ramping.  Thursday, August 07, 2014, 11:39 Target has been heated for 11hrs at TGHT/TBHT = 820A/230A. Temperature measured with pyrometer: Target leg = 1600C + (250 correction for e=0.25) = 1850C Inside target material = dark, temp can't be measured. Cooling down at 2A/min for TGHT and 1A/min TBHT.

 Friday, August 08, 2014, 15:14

Vented in air and opened up up this morning.

Endcaps inserted and expanded.

Rh foil and salts added.

 Monday, March 09, 2015, 16:47

Target consists of 400 discs.

Total packed length 3.4cm

Total mass 45.8181g

Re foil inserted.

Chamber is currently being pumped down.

No Ta-heat shield wrapped.

One end-cap inserted on left (wrt ionizer into the page)

TGHT and TBHT will be ramped up to 820A/230A respectively at 2.0A/min.

 Tuesday, March 10, 2015, 10:28

HS water valves opened, no leaks detected.

IGP1 = 4.5e-7 Torr.

Power supply not responding to epics...AGAIN. grrrr 

Tuesday, March 10, 2015, 13:17  

IOC was rebooted - back up and running again! yay! 

IGP1 = 4.0e-7 Torr.

Tapped up manually to 35A, waited ~30min, vaccuum stable.

Initiating auto-ramp.

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.

 Wednesday, March 11, 2015, 09:11

Target has been at max setpoints for ~14hrs.

OMEGA = 1472C

TGHT = 820A, 12.85V

TBHT = 230A, 3.696V

IGP1 = 5.5ee-7 Torr

Manually tapping up to obtain hotter internal temperature...

 Wednesday, March 11, 2015, 11:33

Current conditions:

OMEGA = 1565C

TGHT = 900A, 14.3V

TBHT = 230A, 3.7V

IGP1 = 6.3e-7 Torr

Digital pyrometer readings:

Hottest point on left leg, WRT ionizer tube into page = 2400C

Internal temp of container = 1580C

Sat at this temperature ~45min.

Initiating auto-cool at TGHT 2.0A/min, TBHT 1.0A/min

[See attached photo for collected data]

 Thursday, March 12, 2015, 13:12

vented and opened up this morning.

only reached a max internal temp of 1580C.

therefore added 3xTa heat shield and will re-condition at a higher temp.

currently pumping back down.

 Thursday, March 12, 2015, 14:34

IGP1 = 7.0e-7 Torr

stepped up to 35A, waited ~30min, vacuum stable.

IGP1 = 6.1e-7 Torr

Initating ramp-up...

 Friday, March 13, 2015, 07:47

IGP1 = 2.9e-7 Torr

reached max set points for TGHT = 600A, TBHT = 230A

Initiating manual tap-up.

 Friday, March 13, 2015, 10:31

Reached 720A, 1800C at 0850

Will continue to heat for ~3hrs

[see attachment for collected data]

 Friday, March 13, 2015, 12:00

Sat at max temperature, 1800C, for 3 hours.

Initiating auto-cool at 2.0A/min for TGHT and 1.0A/min for TBHT.

Laura Lambert wrote:

Monday, March 09, 2015, 16:47 Target consists of 400 discs. Total packed length 3.4cm Total mass 45.8181g Re foil inserted. Chamber is currently being pumped down. No Ta-heat shield wrapped. One end-cap inserted on left (wrt ionizer into the page) TGHT and TBHT will be ramped up to 820A/230A respectively at 2.0A/min.  Tuesday, March 10, 2015, 10:28 HS water valves opened, no leaks detected. IGP1 = 4.5e-7 Torr. Power supply not responding to epics...AGAIN. grrrr  Tuesday, March 10, 2015, 13:17   IOC was rebooted - back up and running again! yay!  IGP1 = 4.0e-7 Torr. Tapped up manually to 35A, waited ~30min, vaccuum stable. Initiating auto-ramp. Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.  Wednesday, March 11, 2015, 09:11 Target has been at max setpoints for ~14hrs. OMEGA = 1472C TGHT = 820A, 12.85V TBHT = 230A, 3.696V IGP1 = 5.5ee-7 Torr Manually tapping up to obtain hotter internal temperature...  Wednesday, March 11, 2015, 11:33 Current conditions: OMEGA = 1565C TGHT = 900A, 14.3V TBHT = 230A, 3.7V IGP1 = 6.3e-7 Torr Digital pyrometer readings: Hottest point on left leg, WRT ionizer tube into page = 2400C Internal temp of container = 1580C Sat at this temperature ~45min. Initiating auto-cool at TGHT 2.0A/min, TBHT 1.0A/min [See attached photo for collected data]  Thursday, March 12, 2015, 13:12 vented and opened up this morning. only reached a max internal temp of 1580C. therefore added 3xTa heat shield and will re-condition at a higher temp. currently pumping back down.  Thursday, March 12, 2015, 14:34 IGP1 = 7.0e-7 Torr stepped up to 35A, waited ~30min, vacuum stable. IGP1 = 6.1e-7 Torr Initating ramp-up...  Friday, March 13, 2015, 07:47 IGP1 = 2.9e-7 Torr reached max set points for TGHT = 600A, TBHT = 230A Initiating manual tap-up.  Friday, March 13, 2015, 10:31 Reached 720A, 1800C at 0850 Will continue to heat for ~3hrs [see attachment for collected data]  Friday, March 13, 2015, 12:00 Sat at max temperature, 1800C, for 3 hours. Initiating auto-cool at 2.0A/min for TGHT and 1.0A/min for TBHT.

 Monday, March 16, 2015, 17:30

Target was removed from Evap#2.  It was successfully conditioned. 

The other end cap was inserted and expended. 

Standard salts were added.   And Re foil is inserted. 

Target is ready for assembly.

 Friday, July 31, 2015, 15:39

A Ta tube was coated with TaC.  The inner of the tube was filled with TaC solution and the excess was drained out to give a homogenous coating.  The outer layer of the tube was brushed with TaC. 

The tube is installed in a target boat and wrapped with 3 layers of heat shields.  

Chamber is currently pumped down and the target heater will be ramped up after the long weekend (Tue)

A new window port is installed (see photo).  TGHT will need to be ramped up slowly to make sure the new window can sustain the heat shine from the target - local check on the Evap is required to make sure it's safe to keep ramping up the heater.     

John Wong wrote:

Friday, July 31, 2015, 15:39 A Ta tube was coated with TaC.  The inner of the tube was filled with TaC solution and the excess was drained out to give a homogenous coating.  The outer layer of the tube was brushed with TaC.  The tube is installed in a target boat and wrapped with 3 layers of heat shields.   Chamber is currently pumped down and the target heater will be ramped up after the long weekend (Tue) A new window port is installed (see photo).  TGHT will need to be ramped up slowly to make sure the new window can sustain the heat shine from the target - local check on the Evap is required to make sure it's safe to keep ramping up the heater.

Tuesday, August 04, 2015, 11:26

HS water valves opened, no leaks detected.

IGP1 = 2.2e-7 Torr.

Tapped up manually to 30A.

IGP1 = 2.7e-7 Torr.

Initiating auto-ramp at 0.2A/min with a final value of 350A.

 Tuesday, August 04, 2015, 15:30

IGP1 = 2.8e-6 Torr.

TGHT = 79A.

Increasing ramping rate to 0.5A/min

 Wednesday, August 05, 2015, 15:25

EVAP2 reached 350A this morning, OMEGA = 1414C

Temperature measurements were taken using the FLUKE IR camera of the new window port to be used for the second OMEGA camera.

Measurements were taken of both the Cu seal on the inside of the window and in the centre of the window [the hottest point].

TGHT was ramped up at 2.0A/min from 1414C --> 1800C with auto ramp paused at each measurement reading taken.

See attachment for raw data.

TGHT remained at 500A/1800C for 4hrs and will be cooled down at a rate of 2.0A/min.

 Thursday, August 06, 2015, 15:32

Vented and opened today.

New window port passed inspection, max temperature reached = 32.4C

Coating on tube looks good, partial sintering. Internal sintered better than outside of tube.

See attached photos.

Tuesday, August 18, 2015, 15:53

Target consists of 505 discs.

Total packed length 3.4cm.

Total mass 75.2772g.

Re foil inserted.

3x Ta Heat shields.

No endcaps inserted.

Chamber currently pumping down.

TBHT will be ramped up to 230A at 1.0A/min.

TGHT will be ramped up to 1800C, auto ramp to 600A at 2.0A/min [estimated final value of 720A according to elog ID 184]

*Note: Turbo Pump is on low speed

 Wednesday, August 19, 2015, 10:15

IGP1 = 8.3e-7 Torr.

Tapped up manually to 35A.

Initiating auto-ramp.

Wednesday, August 19, 2015, 15:55  

IGP1 = 3.3e-6 Torr.

TBHT reached max setpoint of 230A

TGHT reached max setpoint of 600A

OMEGA = 1554C

Increasing final setpoint of TGHT to 700A and re-initiating auto-ramp.

Laura Lambert wrote:

Tuesday, August 18, 2015, 15:53 Target consists of 505 discs. Total packed length 3.4cm. Total mass 75.2772g. Re foil inserted. 3x Ta Heat shields. No endcaps inserted. Chamber currently pumping down. TBHT will be ramped up to 230A at 1.0A/min. TGHT will be ramped up to 1800C, auto ramp to 600A at 2.0A/min [estimated final value of 720A according to elog ID 184] *Note: Turbo Pump is on low speed  Wednesday, August 19, 2015, 10:15 IGP1 = 8.3e-7 Torr. Tapped up manually to 35A. Initiating auto-ramp. Wednesday, August 19, 2015, 15:55   IGP1 = 3.3e-6 Torr. TBHT reached max setpoint of 230A TGHT reached max setpoint of 600A OMEGA = 1554C Increasing final setpoint of TGHT to 700A and re-initiating auto-ramp.

 Wednesday, August 19, 2015, 17:13

TGHT reached to 700A/10.5V, direct voltage at 5.2V, and temp measured at both ends at 1755C.  Vac is coming down from 4.2e-6 Torr. 

Stepping up TGHT to reach 1800C

Wednesday, August 19, 2015, 17:22

Increased TGHT to 722A/11.3V (direct voltage at 5.48V) to reach 1800C (consistant with the heating curve as for the previous HPTa target, elog 184)

Will continue to condition the target at this temperature for overnight. 

Cooling down can be initiated tomorrow morning at 2A/min --- Please measure the target temperature from the new window port before cooling it down.

John Wong wrote:

Laura Lambert wrote: Tuesday, August 18, 2015, 15:53 Target consists of 505 discs. Total packed length 3.4cm. Total mass 75.2772g. Re foil inserted. 3x Ta Heat shields. No endcaps inserted. Chamber currently pumping down. TBHT will be ramped up to 230A at 1.0A/min. TGHT will be ramped up to 1800C, auto ramp to 600A at 2.0A/min [estimated final value of 720A according to elog ID 184] *Note: Turbo Pump is on low speed  Wednesday, August 19, 2015, 10:15 IGP1 = 8.3e-7 Torr. Tapped up manually to 35A. Initiating auto-ramp. Wednesday, August 19, 2015, 15:55   IGP1 = 3.3e-6 Torr. TBHT reached max setpoint of 230A TGHT reached max setpoint of 600A OMEGA = 1554C Increasing final setpoint of TGHT to 700A and re-initiating auto-ramp.    Wednesday, August 19, 2015, 17:13 TGHT reached to 700A/10.5V, direct voltage at 5.2V, and temp measured at both ends at 1755C.  Vac is coming down from 4.2e-6 Torr.  Stepping up TGHT to reach 1800C Wednesday, August 19, 2015, 17:22 Increased TGHT to 722A/11.3V (direct voltage at 5.48V) to reach 1800C (consistant with the heating curve as for the previous HPTa target, elog 184) Will continue to condition the target at this temperature for overnight.  Cooling down can be initiated tomorrow morning at 2A/min --- Please measure the target temperature from the new window port before cooling it down.

 Thursday, August 20, 2015, 08:27

OMEGA = 1830C

Internal temperature using Mikron taken from the second 'new' view port: Hottest point on target leg = 2250C; hottest point on target material discs inside container = 1830C.

IGP1 = 1.5e-6 Torr.

EVAP2 has been sitting at max setpoints for ~15hours.

Initiated auto-cool at 2.0A/min and 1.0A/min for the TGHT and TBHT respectively.

Laura Lambert wrote:

John Wong wrote: Laura Lambert wrote: Tuesday, August 18, 2015, 15:53 Target consists of 505 discs. Total packed length 3.4cm. Total mass 75.2772g. Re foil inserted. 3x Ta Heat shields. No endcaps inserted. Chamber currently pumping down. TBHT will be ramped up to 230A at 1.0A/min. TGHT will be ramped up to 1800C, auto ramp to 600A at 2.0A/min [estimated final value of 720A according to elog ID 184] *Note: Turbo Pump is on low speed  Wednesday, August 19, 2015, 10:15 IGP1 = 8.3e-7 Torr. Tapped up manually to 35A. Initiating auto-ramp. Wednesday, August 19, 2015, 15:55   IGP1 = 3.3e-6 Torr. TBHT reached max setpoint of 230A TGHT reached max setpoint of 600A OMEGA = 1554C Increasing final setpoint of TGHT to 700A and re-initiating auto-ramp.    Wednesday, August 19, 2015, 17:13 TGHT reached to 700A/10.5V, direct voltage at 5.2V, and temp measured at both ends at 1755C.  Vac is coming down from 4.2e-6 Torr.  Stepping up TGHT to reach 1800C Wednesday, August 19, 2015, 17:22 Increased TGHT to 722A/11.3V (direct voltage at 5.48V) to reach 1800C (consistant with the heating curve as for the previous HPTa target, elog 184) Will continue to condition the target at this temperature for overnight.  Cooling down can be initiated tomorrow morning at 2A/min --- Please measure the target temperature from the new window port before cooling it down.    Thursday, August 20, 2015, 08:27 OMEGA = 1830C Internal temperature using Mikron taken from the second 'new' view port: Hottest point on target leg = 2250C; hottest point on target material discs inside container = 1830C. IGP1 = 1.5e-6 Torr. EVAP2 has been sitting at max setpoints for ~15hours. Initiated auto-cool at 2.0A/min and 1.0A/min for the TGHT and TBHT respectively.

 Thursday, August 20, 2015, 17:14

Target was removed the the evaporator and inspected.  It looks good! 

Ta-heat shields are removed. 

End caps are inserted but need to be expended.

Ready for assembly.

 Wednesday, December 16, 2015, 10:09

Target consists of 505 discs.

Total packed length 3.4cm.

*same parameters at Ta#46*

Total mass of target materials 53.9381g [4 packs of 20 with Ta wire + 425 single discs].

3 x Ta Heat shields.

No Re foil inserted.

No endcaps inserted.

Chamber pumped down overnight.

IGP1 = 5.1e-7 Torr.

Tapped up manually to 35A.

IGP1 = 5.2e-7 Torr.

Vacuum stable, initiating auto-ramp.

TBHT will be ramped up to 230A at 1.0A/min.

TGHT will be ramped up to 1800C, auto ramp to 600A at 2.0A/min [estimated final value of 720A according to elog ID 239]

 Wednesday, December 16, 2015, 15:08

TBHT reached max setpoint of 230A, 3.3V

TGHT = 600A, 8.9V

IGP1 = 1.1e-6 Torr.

OMEGA = 1543C

Increasing final setpoint of TGHT to 700A and re-initiating auto-ramp.

 Wednesday, December 16, 2015, 16:02

TGHT = 700A, 10.6V

IGP1 = 2.1e-6 Torr.

OMEGA = 1740C

Tapping up manually to 1800C.

 Wednesday, December 16, 2015, 16:28

TGHT = 730A, 11.2V

Vacuum is coming down from IGP1 = 2.6e-6 Torr.

OMEGA = 1800C

Will condition the target at 1800C overnight and ramp down in the morning.

 Thursday, December 17, 2015, 09:31

OMEGA = 1802C on right side

Temp on leg of left side = 2150C, the hottest point - measured with the Mikron pyrometer.

 Friday, December 18, 2015, 08:53

Evap2 remained at 1800C for ~26.5hrs

Auto-ramped down to TGHT = 300A and TBHT = 90A at a rate of 2.0A/min and 1.0A/min respectively.

Conditioning complete.

TGHT will be ramped up later today for emissivity measurements.

 Monday, January 04, 2016, 11:21

the following was performed by aurelia.

emissivity measurements were taken late december.

evap2 was cooled down and left under vacuum over the xmas break.

currently ramping back up for more emissivity measurements.

 Friday, January 08, 2016, 10:47

Aurelia done measurements.

vented and opened this morning.

Temperature measurements in progress this week for Ta HP-SIS.

See attachment for the current settings and rampings of the TGHT/TBHT  for the temperature measurements taken on  Jan. 9-10, 2016 .

Note: TBHT PS tripped off on Jan. 9, 2016 (see first page of the attached file) and couldn't turn it ON again over the week-end.

Aurelia Laxdal wrote:

Temperature measurements in progress this week for Ta HP-SIS.

 Friday, January 08, 2016, 10:49

Rh foil added.

endcaps inserted and expanded.

total length of target with end caps = 3.45cm

spot weld one thermocouple onto center block and one thermocouple onto target leg [left side wrt ionizer tube into page].

 see elog id# 268 for more info regarding measurements taken and state of TBHT power supply...

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).

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.

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