Friday, April 11, 2025, 06:18

 initial IPG1=2.3 e=06 Torr

Ta container tube, wrapped in 4 Ta foil heat-shields, and loaded with _________ D shaped discs in a 12mm graphite cartridge with usable 11mm

conditioning tube WO = 41882-4

End-caps on the graphite cartridge have holes for outgassing.  One spring each end in the Ta container

initial heating @ 2A/min to 85 A then 2A/min to 120A TGHT

OMEGA slope = 0.99

Vacuum limits up to 400A: 5.0e-04 Torr -- 1.0e-02 Torr

Friday, April 11, 2025, 14:45

reached 1800 C on OMEGA at 398A readback

Will take to ~410 A and leave for 4 hours

Friday, April 11, 2025, 18:55

at 415A OMEGA was 1879 C

was left for 4 hours at this setting

starting rampdown at -2A/min

Darwin Ortiz Rosales wrote:

Wednesday, April 26, 2023, 09:32 LP FEBIAD loaded with 367 TiC discs and 4 TiC removable discs for analyses 50 packs of 5 and the rest are singles TaC coated (sintered) springs placed at both ends Initial total Weight = 521.83 g Initial heating @ 1A/min to 400 A on TGHT and 280A on TBHT OMEGA slope = 0.99 Vacuum limits up to 200A:  3.0e-05 Torr -- 5.0e-04 Torr Vacuum limit up after 200A: 3.0e-05 Torr -- 5.5e-05 Torr No Ta heat-shields used Initial IGP1 = 4.1e-07 Torr Wednesday, April 26, 2023, 09:49 Starting initial ramp up to 200A on both TGHT and TBHT @ 1A/min Wednesday, April 26, 2023, 12:50 Around 120A on TGHT, the pressure started to slowly drop.  First outgassing done. Wednesday, April 26, 2023, 14:03 IGP1 = 6.0 e-05 Torr TGHT = 200 A, 2.7V TBHT = 200 A, 2.6 v OMEGA = Below lower limit Waiting for pressure to fall below 5e0-5 Torr.  Will change bad vacuum to 5.0e-05 Torr and then continue ramping @1A/min to 400 A on TGHT and 280 A on TBHT. Wednesday, April 26, 2023, 14:13 IGPI= 4.2 e-05 Torr starting ramping to 400 A on TGHT and 280A on TBHT  Wednesday, April 26, 2023, 14:26 The IGP1 pressure just fell below 3.0e-05 Torr and ramping has resumed Wednesday, April 26, 2023, 14:42 pressure hovering around good vacuum so very slow progress. Wednesday, April 26, 2023, 15:12 TGHT= 223 A, 3.1 V TBHT = 226 A, 3.0 V Set ramp rate is 1A/min but real rate is slightly less than 0.5A/min due to pressure fluctuation.

 Vacuum spike at 300A.

Currently:

TGHT= 316A, 4.6V

TBHT=283A, 3.9V

Wednesday, April 26, 2023, 18:18 Ramping TBHT down from 280A to 270A

Darwin Ortiz Rosales wrote:

John Wong wrote: Carla Babcock wrote: Darwin Ortiz Rosales wrote: Wednesday, April 26, 2023, 09:32 LP FEBIAD loaded with 367 TiC discs and 4 TiC removable discs for analyses 50 packs of 5 and the rest are singles TaC coated (sintered) springs placed at both ends Initial total Weight = 521.83 g Initial heating @ 1A/min to 400 A on TGHT and 280A on TBHT OMEGA slope = 0.99 Vacuum limits up to 200A:  3.0e-05 Torr -- 5.0e-04 Torr Vacuum limit up after 200A: 3.0e-05 Torr -- 5.5e-05 Torr No Ta heat-shields used Initial IGP1 = 4.1e-07 Torr Wednesday, April 26, 2023, 09:49 Starting initial ramp up to 200A on both TGHT and TBHT @ 1A/min Wednesday, April 26, 2023, 12:50 Around 120A on TGHT, the pressure started to slowly drop.  First outgassing done. Wednesday, April 26, 2023, 14:03 IGP1 = 6.0 e-05 Torr TGHT = 200 A, 2.7V TBHT = 200 A, 2.6 v OMEGA = Below lower limit Waiting for pressure to fall below 5e0-5 Torr.  Will change bad vacuum to 5.0e-05 Torr and then continue ramping @1A/min to 400 A on TGHT and 280 A on TBHT. Wednesday, April 26, 2023, 14:13 IGPI= 4.2 e-05 Torr starting ramping to 400 A on TGHT and 280A on TBHT  Wednesday, April 26, 2023, 14:26 The IGP1 pressure just fell below 3.0e-05 Torr and ramping has resumed Wednesday, April 26, 2023, 14:42 pressure hovering around good vacuum so very slow progress. Wednesday, April 26, 2023, 15:12 TGHT= 223 A, 3.1 V TBHT = 226 A, 3.0 V Set ramp rate is 1A/min but real rate is slightly less than 0.5A/min due to pressure fluctuation.  Vacuum spike at 300A. Currently: TGHT= 316A, 4.6V TBHT=283A, 3.9V Wednesday, April 26, 2023, 18:18 Ramping TBHT down from 280A to 270A  Wednesday, April 26, 2023, 22:12 TGHT = 400A, 6.1V; TBHT = 274A/3.7V. Temp is holding sturdy ~1100 C and will leave it overnight. Pressure is coming down, currently at 8.8 e-6 Torr.  See attachment for the overview.  TGHT will continue to ramp up tomorrow morning; check the pressure to ensure it has come down below 5e-6 Torr before proceeding.  Refer to the instructions for details.         Thursday, April 27, 2023, 06:27 IGP1= 1.7e-06 Torr OMEGA= 1097 C TGHT= 400A, 6.2V TBHT= 273A, 3.7 V Starting ramp up of TGHT @0.2A/min set to 550A

 Reached 550A on TGHT (paused there until I realized it was stopped) then resumed ramping to 580A at 0.2A/min. Saw both vacuum spikes before 550A. Attaching screenshot from John.

Purpose: Sinter one sample of each of TiC, VC, Cr3C2, ZrC, NbC, Mo2C, TaC, and WC on 5x10 mm tantalum foil to see if the samples are usable for SEM.

Samples were prepared using a solution of PEG (2.56 g), PVB (2.45 g), paraffin oil (1.12 g), MEK (15 mL), and EtOH (23 mL). Slurries made using 0.0013 mol of each carbide with ~230 uL of the solution. Applied via paintbrush onto 5x10 mm tantalum foil. 

The samples were placed directly on the target boat, no graphite layer between. We will check to see if the tantalum foil fuses to the boat or not.

Currently (May 29th), the chamber is still pumping down. John and I will continue the procedure tomorrow.

 Pressure down to 7.1e-7 Torr. Water valve to heat shield was opened; pressure remained stable. 

Current turned up to 40 A for now.  Will increase at 2 A/min up to 500 A over the weekend, then on Monday we will turn it up to 600 A and check the temperature. 

Auto-ramp started. Max current = 500 A, voltage = 11.05 V. Current is being increased at 2 A/min. In the first 20 minutes, the pressure went up to about 10E-6 T, but has slowly decreased since then. Everything looks ok. The system will be left until Monday morning (June 9th). 

Manually changed current from 500 to 615 A, monitoring the temperature. Temperature went from 1657 C up to 1838 C. Pressure increased up to 7.2e-7 T. Samples should be left for about 4 hours (615 A started just before 13:00), then the goal is to ramp current back to zero.

 Target boat is now being cooled at 1 A/min from the starting point (616 A) down to 0 A. 

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.

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).

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.

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.

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.

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.

Laura Lambert wrote:

Thursday, October 13, 2016, 18:04 Target loaded into evap2 No heat shields. Both endcaps inserted and expanded. Rh foil inserted [when inserting, the Ta rod used to expand the Rh foil inside the ionizer tube snapped off inside the container - this piece was able to be shaken out and is no longer inside] Chamber pumped down. HS water valves opened, no leaks detected   Tapped up manually to 35A   Vacuum stable, IGP1 = 5e-7 Torr   Initiating auto-ramp.   OMEGA slope = 0.98 TBHT will be ramped up to 230A at 1.0A/min. TGHT will be ramped up to 300A at 2.0A/min. Final desired temperature = 1900C Friday, October 14, 2016, 13:28 TGHT and TBHT had reached 300A/ 230A respectively. Power bump ~10min ago caused evap2 to trip off. Tapped back up manually to 35A. Re-initiating auto ramp now.

Friday October 14: the target was ramp up to 300A/230A after Laura started it. Then, I cooled down at 6pm before leaving TRIUMF. <br>

Saturday October 15: restated the auto-ramp for Ta#50 in EVAP2. It's currently set to go to 300A/230A.

Aurelia Laxdal wrote:

Laura Lambert wrote: Thursday, October 13, 2016, 18:04 Target loaded into evap2 No heat shields. Both endcaps inserted and expanded. Rh foil inserted [when inserting, the Ta rod used to expand the Rh foil inside the ionizer tube snapped off inside the container - this piece was able to be shaken out and is no longer inside] Chamber pumped down. HS water valves opened, no leaks detected   Tapped up manually to 35A   Vacuum stable, IGP1 = 5e-7 Torr   Initiating auto-ramp.   OMEGA slope = 0.98 TBHT will be ramped up to 230A at 1.0A/min. TGHT will be ramped up to 300A at 2.0A/min. Final desired temperature = 1900C Friday, October 14, 2016, 13:28 TGHT and TBHT had reached 300A/ 230A respectively. Power bump ~10min ago caused evap2 to trip off. Tapped back up manually to 35A. Re-initiating auto ramp now.   Friday October 14: the target was ramp up to 300A/230A after Laura started it. Then, I cooled down at 6pm before leaving TRIUMF. <br> Saturday October 15: restated the auto-ramp for Ta#50 in EVAP2. It's currently set to go to 300A/230A.

 Sunday October 16: the target temperature measurements up to 620A/230A were performed today not on October 15 (yesterday, it was cooled down before reaching 300A/230A). Currently the target is cooling down, to be ready tomorrow morning for the Test Stand. 

 Thursday, July 25, 2024, 15:18

Target container consists of two np-Ta fibres disk samples. Both disks are made from heat stabilized np-Ta fibres (150 C for 17 hours) and were pressed at 8 tons / 300 MPa.

Sample 1 was made from np-Ta fibres spun using Dope solution #1. Sample 1 disk has an average thickness of 0.727 mm and a diameter of 17.113 mm. Mass of the green sample 1 disk is 0.1957 g. 

Sample 2 was made from np-Ta fibres spun using Dope solution #6. Sample 2 disk has an average thickness of 0.688 mm and a diameter of 17.123 mm. Mass of the heat stabilized fibres used to make the green sample 2 disk is 0.1860 g. Mass loss from pressing the heat stabilized fibres was virtually zero. Therefore, although the mass of the green sample 2 disk was not measured, it can be extrapolated to be 0.1860 g. 

Target container was wrapped with Ta foil. Each sample disk was wrapped in graphite foil and placed inside the target container horizontally near the center. 

Omega slope was initially set to 0.980. After reviewing previous logbook on np-Ti (e-log ID#633), changed the Omega slope to 0.990. 

Chamber is currently being pumped down. The current reading (as of 15:40) is 4.70e-05 Torr. 

Two heating schedules will be tested. Heating schedule 1 entails heating both sample disks at ~1000 C until the pressure reaches below 1.00e-06 Torr. Once heating schedule 1 is completed, sample 1 will be removed. Heating schedule 2 entails heating sample 2 to ~1800 C until the pressure reaches below 1.00e-06 Torr. TGHT is estimated to be approximately 440A/7.6V to reach 1875 C (348A/5.8V to hold temperature at 1600 C). Refer to e-log ID#605. 

John Wong wrote:

Friday, January 11, 2013, 10:59 The insulator that holds the terminals was broken when a target container was installed.  The insulator had seen so much heat shine from the Cu heat-shield gaps, see attachment.  Tightening the bolts on the target container might further put more force on the insulator and eventually broke it. To prevent this to happen again.  The Cu-heat shield gaps have covered with Ta-foil to prevent any shine from the target  container onto the insulator.  Also, a torque wrench will be used to tighten the bolts on the terminals.  At this point, we don't know the max torque the insulator can tolerate.  Some measurements were done on the target resistant (ohm) as a function of torque (in pounds).  The best torque to tighten the terminal bolts is 150 lbs.

The insulators were installed with torques as indicated in the attached PDF ITD0052. A torque test was performed on the broken insulator before installation. No damage was seen on torques of up to 60 in lbs for the 1/4-20 bolts, however for torques in excess of 50 in lbs the insulator material seems to "give".

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.