Tuesday, February 23, 2021, 08:49

Yesterday a heat shield was washed and when dry it was installed in the EVAP2,

A 1mm thick rhenium wire was held within two copper brackets to pass through a Cu tube with the intention of coating its inside face

Tuesday, February 23, 2021, 08:58  IGP1 = 7.7e-7 Torr

Pressure 5.88e-7 Torr, current rate set to 10 A @ 0.5 A/min

Pressure 6.1e-7 Torr, current rate set to 20 A @ 0.5 A/min

Pressure 8.51e-7 Torr current rate set to 30 A @ 0.5 A/min, temperature corrected 1800 degC (measured with filament pyrometer)

After 10 min the current and voltage are stable and the pressure is going down

Tuesday, February 23, 2021, 16:25

It seems like the wire is touching the tube so the system will be cool down.

Pressure 6.8e-7 Torr current rate set to 0A at -0.1 A/min

 Tuesday, February 23, 2021, 17:38

Pressure 6e-7 Torr, TGHT = 23.3 A, 4.854 V, Temp 1788 deg C Omega, 1540 degC filament

current rate set to 0A at 0.2A/min 

Wednesday, February 24, 2021, 09:37

Venting EVAP2 

Wednesday, February 24, 2021, 16:47

The wire and Cu tube were  fix such that the wire's deformation does not lead it to touch the tube, then the assembly was attached again and the EVAP2 was pumped down.

IGP1 = 9.3e-7 Torr, current rate is set to 5 A at 0.5 A/min

Wednesday, February 24, 2021, 17:04

IGP1 = 9e-7 Torr TGHT = 5.175A, 0,749 V

current rate is set to 10 A at 0.5 A/min

Wednesday, February 24, 2021, 17:23

IGP1 = 8.8e-7 Torr, TGHT = 10A, 1.78V

current rate is set to 20 A at 0.5 A/min

Since the wire seemed to be touching the tube, the system was vented.

The tube was shifted and the heat shield installed again, the system was pumped over nigth.

Thursday, February 25, 2021, 09:15

A water leak was performed and no leak was observed

IGP1= 4.95e-7 Torr

Thursday, February 25, 2021, 09:32  The current is increased at 0.5 A/min to 5 A

Thursday, February 25, 2021, 10:00

The current was tapped manually at 0.5 A to 6 A the wire is now glowing dimmly

Current rate set to 10A at .5 A/min

Current rate set to 20 A at 0.5A/min

Current rate set to 30 A at 0.5A/min

Thursday, February 25, 2021, 11:17  IGP1= 5.7e-7 Torr, TGHT=30.5A, 6.718V, filament=1740 degC

voltage and current stable, pressure going down.

Thursday, February 25, 2021, 11:21

Current rate set to 40 A at 0.4 A/min

Thursday, February 25, 2021, 11:53 IGP1 = 5.9e-7 Torr, TGHT = 9.267V, 39.15A, filament = 2060 degC

voltage and current stable, pressure going down.

Current rate set to 50 A @ 0.2A/min

During ramping the voltage reduced a bit and I decided to stop the ramp and reduce the current, the voltage stayed constant but the current started increasing slowly without me inputting it so I decided to ramp down the current at 0.2A/min.

When the current reached 0A the power supplies and the pumps were turned off, after an ~1h when the turbo pump had already stopped, the EVAP2 was vented and open.

The wire sintered to the copper tube confirming that the wire was in contact with the tube during heating.

The Cu tube present a grey metallic coloration indicating a Re coating.

The set up together with the copper heat shield were removed from the

Saturday, February 13, 2021, 08:10

Ta boat loaded with 80 discs enclosed in graphite foil in pockets of 20.  Sample A at both ends and sample B in the middle spaced out. Boat wrapped in Ta heat-shields (3 layers).

(A B B A)

Desired temperature= 1800C (expected TGHT approx 410 A).

good vacuum = 3.00 e-05 Torr

bad vacuum = 5.00 e-05 Torr

Evap2 left to pump down over previous night.

IGP1= 5.4e-7 Torr and stable

Initiating TGHT ramp up at 1 A/ min to 30 A

Saturday, February 13, 2021, 12:19

IGP1= 6.9e-06 Torr

Ramp to 50 A 1A/min

Saturday, February 13, 2021, 14:35

IGP1 = 6.4e-6 Torr

Pressure trending down. 

Saturday, February 13, 2021, 14:56

IGP1= 4.9 e-6 Torr

Initiate Ramp up @ 1 A/min to 400 A

Changed ramp up to 0.5 A/min at around 11:30 pm

Sunday, February 14, 2021, 11:43

The current will be ramped up to 420 A according to the trendline approximation (see attachement 1)

Sunday, February 14, 2021, 12:26

IGP1 = 8.9 e-06 Torr and trending down

TGHT = 420 A, 7.5 V

OMEGA = 1730 C

Will ramp up to 428 A manually 

Sunday, February 14, 2021, 12:30

Reached 428 A on TGHT.  

OMEGA = 1760 C

Will bump to 430 A and hold for 4 hours

OMEGA= 1765 C

Sunday, February 14, 2021, 18:00

OMEGA = 1789 C

IGP1= 7.5 e -7 Torr

TGHT = 430.5 A , 7.8 V

Start ramping down at -1A/min to zero A

Thursday, February 10, 2021, 12:00

Objective: Heat a Re wire to evaporate it and deposit a layer of Re on the inner surface of a Ta tube.

A Re wire of 1mm diameter was clamped with Cu brackets in EVAP2, the wire is partially enclosed in a Ta tube. EVAP2 pumping down 

The wire needs to be heated to 2500 degC since this is its sublimation temperature at 8e-7 Torr

There is not a reliable system to measure the temperature of the wire but the readings of the micron, manual, and omega pyrometers will be register.

According to COMSOL simulations a power and taking in consideration the EVAP2's power loss, a power of 520 W (5A, 10V) is required.

Thursday, February 11, 2021, 15:39

Pressure 3.78e-7 Torr, current rate set to 10 A @ 0.5 A/min

Thursday, February 11, 2021, 16:32

Pressure: 4.01e-7 Torr, TGHT = 10A, 1.719 V. The voltage has stabilized, the wire is glowing but not enough for reading with micron nor omega, manual reads 970 degC. Also, the wire formed an arc (crest).

Thursday, February 11, 2021, 16:44

 Pressure 3.8e-7 Torr, TGHT  = 10 A, 1.723 V ramp set to 20A @ 0.2 A/min

Thursday, February 11, 2021, 17:26  

Pressure increasing 4.7e-7 torr, TGHT = 20 A, 4.016 V, the wire does not seem to be changing, 

Thursday, February 11, 2021, 18:02

Ramp set to 30A @0.4A/min

Pressure  7.2e-7 Torr, TGHT = 30A, 6.561V, manual pyrometer reads 1720degC

Ramp set to 40A @0.4A/min

Thursday, February 11, 2021, 18:35

 Pressure 2.1e-6Torr and increasing, TGHT = 40A, 9.1V, manual pyrometer reads ~1880 degC

Ramp set to 50A @ 0.4 A/min

Monday, February 08, 2021, 17:00: Installed brackets w/ Ta wire and a small piece of Re to test voltage drop.

Rough down, TP on. Waterlines open.

Tuesday, February 09, 2021, 06:44: Vacuum @ 8.63e-07T.

Tuesday, February 09, 2021, 06:45: Shut TP & roughing pump ff. Valves are close. Ready for power outage.

Tuesday, February 09, 2021, 11:30: BP1 & TP1 back on.

Tuesday, February 09, 2021, 11:37: PS on. Vacuum @ 9.7e-06T & continuing down.

micron slope 0.98

Tuesday, February 09, 2021, 16:01 Pressure 7.26e-7 Torr

aiming at a temperature of 2000 degC on the wire; wire is not in the visual range of pycnometer; simulations of the system indicate that wire will be at 2000 degC at 60 W, hence current will be increased slowly.

Rate: 0.1 A/60 s to 10 A

Tuesday, February 09, 2021, 16:47 Tendence showed that at 5 A the power will be ~10 W, final ramping step was updated accordingly.

Tuesday, February 09, 2021, 16:49 Pressure dropping a bit: Current reading 7e-7 Torr

Tuesday, February 09, 2021, 17:09Pressure going down, curent will be ramped down at 0.2 A/min

Pressure: 6.958e-7 Torr, TGHT: 5 A, 2.748 V, omega is reading 1625 degC somewhere somehow, wire will stay at this conditions for 10 min to see  if there is a pressure or voltage change.

Tuesday, February 09, 2021, 17:16 voltage and temperature are slowly increasing  2.789 V, and 1688 degC respectively.

Tuesday, February 09, 2021, 17:32 Voltage signal is noisy but it seems like the voltage is not increasing anymore, preassure has remained constant, wire is glowing, 1100 degC with manual pyrometer.

Tuesday, February 09, 2021, 17:44 TGHT: 2.81 V, 4.95 A, IGP1 6.63e-7 Torr. current will be increased manually at 0.2 A steps. At first step voltage is stable.

Tuesday, February 09, 2021, 18:13 TGHT: 6.6A, 3.981V (~26W), Omega 1741 degC and manual pyrometer ~1300 degC

Tuesday, February 09, 2021, 18:28 TGHT: 8A, 5.121V (~40W), omega 1816 degc, 1390 degC with manual pyrometer, step changed to 0.4A.

Tuesday, February 09, 2021, 18:34 TGHT: 8.8A, 5.88V (50W), omega 2008 degC, 1500 manual pyrometer

Tuesday, February 09, 2021, 18:56  TGHT: 9.6A, 6.64V, manual pyrometer 1800 degC, omega 2042 degC, wire is shinny enough for micron 2092 degC.

Tuesday, February 09, 2021, 19:01TGHT: 10A, 7V, ~1800 degC manual pyrometer, omega 2123 degC, micron 2152 degC

Tuesday, February 09, 2021, 19:15 TGHT: 10.5A, 7.47V, 2150 degC Omega, 2165 degC, ~1800 degC manual

Tuesday, February 09, 2021, 19:23 TGHT: 11A, 7.93 V, 2188 omega, 2210 deC micron

 Tuesday, February 09, 2021, 19:29 TGHT: 11.5A, 8.37V, 2188 omega, 2210 deC micron

Tuesday, February 09, 2021, 19:33 TGHT: 12A, 9V, 2325 degC, 1900 degC manual, the wire changed shape and the preassure increase a bit , micron was readjusted to read, micron 2454 degC. Wire might be touching tube, only one more amper will be imputed.

Tuesday, February 09, 2021, 19:55 TGHT 13A, 9.865 V, 2404 degC omega , 2558 degC micron, manual pyrometer still reads 1800 degC, pressure increased with the power increment, bbut it seems like the wire touching the tube so no more current will be imputed.

Tuesday, February 09, 2021, 20:08 started ramping at -0.2A/min

Wednesday, February 10th , 20211, 10:00 System unloaded from EVAP2, wire has straightened, it has not sintered to the copper brackets, system is clean there is no evidence of coating.

Monday, February 01, 2021, 13:52  

Ta boat loaded with 20 Disc on either end capped with Ta springs to prevent overexpansion.   discs wrapped Graphite foil and boat wrapped in Ta heat-shields (3 layers).

Sample A on left side and sample B on right side.

Desired temperature= 1800C (expected TGHT 410 A).

good vacuum = 3.00 e-05 Torr

bad vacuum = 5.00 e-05 Torr

Evap2 left to pump down over night.

 Tuesday, February 02, 2021, 10:01

Pressure stable at IGP1= 7.8e-7 Torr

TGHT autoramp  set to 50 A @ 1/min

Tuesday, February 02, 2021, 13:45

IGP1=3.5e-6 Torr

TGHT =49.9 A, 0.56 V

Ramp at 1A/min to 100A

Wednesday, February 03, 2021, 08:25

IGP1= 5.5 e-07 Torr

TGHT = 100 A, , 1.2 V

Yesterday the camera failed to operate.  Cloud service discontinued.  The TS camera is offline but it is a different provider.  Will start ramping to 400A .

Ramp rate 2A/min

Wednesday, February 03, 2021, 15:55

ramped up to 520 A and 9.1V TGHT

Temperature average 1644 C but suspect actual temperature higher.

Held for 5 hours and started ramp down at -2A/min

Thursday, February 04, 2021, 9:35

IGP1= 2.99e-7 Torr

Begin pumpdown procedure and remove container

Note:  SiC evaporation on most discs.  The temperature was too high.  Need to repeat.

Tuesday, November 24, 2020, 09:23

A batch of 60 discs of 18 mm diameter were loaded in a tantalum tube. The tantalum tube was wrapped with 3 layers of Ta foil for heat shielding and mounted in the EVAP2. EVAP2 pumped down overnight and Aaron made a leak test this morning (elog 524). 

The target material will be heated to 1990 degC. To measure the temperature, the tube has a Ta foil close to the graphite foils and it is held in place with a tantalum spring. Another Ta spring holds the graphite foils in the opposite side of the tube. The temperature will be measured with the Omega pyrometer (slope 0.99)

IGP1 = 6e-7 Torr. Note: The pressure has an usual behavior (see 2020-11-24-IGP1  and 2020-11-24IGP1-zoom out). After ~9 hrs, the pressure became stable (see 2020-11-24IGP1 -stable)

Tuesday, November 24, 2020, 13:00

IGP1 = 6.7e-7 Torr

Good vacuum of 3e-2 Torr and Bad vacuum 5e-2 Torr

The autoramp is set to 80 A at 1 A each 10 s 

 Tuesday, November 24, 2020, 13:43

IGP1 = 2.7e-5 Torr

TGHT = 1.13 V 80.5 A

Autoramp is set to to 100 A at 1 A each 20 s

Tuesday, November 24, 2020, 13:57 

IGP1 = 2.5e-5 Torr and going down

TGHT = 100.2 A, 1.47 V

Autoramp is set to to 120 A at 1 A each 20 s

Tuesday, November 24, 2020, 14:06 

IGP1 = 2.09e-5 Torr

TGHT = 1.6 v, 122 A

Autoramp is set to 200 A at 2 A each 10 s

Tuesday, November 24, 2020, 14:18 IGP1 = 5.4e-5 Torr

IGP1 = 1.5e-5 Torr

TGHT = 2.9 V, 200.5 A

Omega = 1123 °C

Autoramp is set to 450 A, conditions:

2 A each 10 s with a good vacuum of 3e-2 Torr and a bad vacuum 5e-2 Torr 

Tuesday, November 24, 2020, 14:45

The autoramp was stopped at 424 A 

TGHT = 421.65 A, 8.353 V

IGP1= 2.5e-5 Torr and going down

Omega 2020 degC

The TGHT current was reduced to 420 A (8.27 V) and the temperature reduced to 2007 degC

Tuesday, November 24, 2020, 21:03

IGP1 = 2.09e-6 Torr

TGHT = 7.899 V, 421.312 A

Temperature = 1870 degC

Autoramp is set to 0 A at 1 A/min 

Monday, November 23, 2020, 17:01: Flex-line HS installed.

Tuesday, November 24, 2020, 08:03: Vacuum @ 9.55e-07T.

Tuesday, November 24, 2020, 08:08: Vacuum Ok

Tuesday, November 24, 2020, 08:09: Modify Controls dialogue on IEVAP2:IGP1:RDVAC

Max value from 0.1 to 0.0001 to better view curve on the strip tool and monitor for vacuum spikes.

Tuesday, November 24, 2020, 08:13: TGHT / TBHT PS on. 

 2020-11-05 15:44 empty and naked boat in for heating up system and clean up. Turbo on.

 2020-11-06 16:58 IGP1:4e-7T leak check ok. Ramping up target to 500A. 1A/10s.

 2020-11-09 12:43 The target was left at 1500degC during the weekend. 

 2020-11-17 14:11 turbo pump off. Slow venting.

 2020-11-18 09:18 Evap2 vented. Target removed.

 2020-11-04 17:31: target installed with boat containing graphite container for outgassing. Roughing pump on.

 2020-11-04 17:49 turbo on, leaving it pumping over night.

 2020-11-05 11:32 leak check ok. Ramping up target to 200A 2A/10s.

 2020-11-05 11:53 IGP1:1.1e-6T . Ramping up target to 300A 1A/10s.

 2020-11-05 11:53 IGP1:1.2e-6T . Pyrometer:1320degC. Ramping up target to 400A 1A/10s.

 2020-11-05 11:53 IGP1:1.8e-6T . Pyrometer:1650degC. Ramping up target to 500A 1A/10s.

 2020-11-05 12:57 IGP1:3.4e-6T . Pyrometer:1910degC. Ramping up target to 525A 1A/10s.

 2020-11-05 13:02 IGP1:3.6e-6T . Pyrometer:1990degC. Leaving it hot for 1h.

 2020-11-05 14:00 IGP1:2e-6T stable . Pyrometer:1990degC. cooling down 2A/10s.

2020-11-02 6:32: roughing on

2020-11-02 7:21: Turbo on for a while, IGP1:1.8e-5T . water leak check ok.

2020-11-02 7:47: IGP1:1e-5T . Ramping up target heater to 200A, 1A/10s.

2020-11-02 7:47: TGHT at 275A, pyrometer at 1300degC. Leaving it hot for 24h.

 2020-11-04 9:06: After 37h treatment, ramping down to 0A.2A/10s.

2020-11-04 9:46: target ramped down. Venting.

2020-11-04 17:30: Big amounts of outgassing non detected in GP1 coated some inner walls in evap2. The walls got cleaned with acetone. All as before now.

 2020-10-27 10:24 setup introduced yesterday. Pumping over night IGP1: 5.7e-7T. Water leak check ok. Performing heating elements check.

 2020-10-27 10:43 Heating elements check show low cooling. Ramping up target 1A/15s to 200A.

 2020-10-27 11:54 all ok 200A, thermocouples show room temperature on cartridge and heat shield. Ramping up target 2A/10s to 300A.

 2020-10-27 11:54 all ok 300A, thermocouples show 28/25degC. Ramping up target 2A/10s to 400A.

 2020-10-27 11:54 all ok 400A, thermocouples show 36.5/29degC. Ramping up target 2A/10s to 500A.

 2020-10-27 11:54 all ok 500A, thermocouples show 48.9/33degC. Ramping up target 2A/15s to 550A.

 2020-10-27 12:43 all ok 550A, thermocouples show 55/34degC. Ramping up target 2A/15s to 600A.

 2020-10-27 12:43 all ok 600A, thermocouples show 61.5/35.2degC. Ramping up target 2A/15s to 625A.

 2020-10-27 13:14 all ok 625A, thermocouples show 64.6/34.2degC. Ramping up target 2A/15s to 650A.

 Nb#9 LP-SIS target description:

Total Ta foils = 470 [6x20 packs + 350 single discs]

Foil Thickness = 0.025mm

Target density =  7.24 g/cm3

Target length = 3.5 cm

Total Mass = 25.343 g [Incl foils + Ta wire on 6 packs]

Total mass w/ Target oven=  425 g (w/ end caps)

Discs in target are arranged as follows: 1pack / 75 singles / 1pack / 100 singles / 2packs / 100 singles / 1pack / 75 singles / 1pack

End caps installed (not yet expanded). No Ta foil heat shield added.

Final desired temperature = 1900C.

OMEGA slope = 0.98.

Wednesday, October 21, 2020, 14:09: Roughing. 

Wednesday, October 21, 2020, 14:32: Turbo pump on. 

Wednesday, October 21, 2020, 15:29: Waterlines opened. Vacuum ok @ 1.05E-05T. 

Wednesday, October 21, 2020, 15:30: TGHT / TBHT PS on. Slope Set.

Wednesday, October 21, 2020, 19:06: Auto-ramping TGHT / TBHT to 300 / 100 @ 1 A per min. Vacuum @ 1.85e-06T.

Thursday, October 22, 2020, 07:26: Auto-ramping TGHT / TBHT to 500 / 200 @ 2 A per min. Vacuum @ 7.61e-07T.

Thursday, October 22, 2020, 11:28: Auto-ramping TGHT / TBHT to 580 / 230 @ 2 A per min. Vacuum @ 1.53e-06T. The Omega IR2C is back. Temp @ 1576 deg C.

Thursday, October 22, 2020, 12:22: Auto-ramping TGHT to 625 A @ 2 A per min. Vacuum @ 2.47e-06T. Temp @ 1734 C.  

Thursday, October 22, 2020, 12:48: Auto-ramping TGHT to 645 A @ 2 A per min. Vacuum @ 3.11e-06T. Temp @ 1815 C.   

Thursday, October 22, 2020, 13:10: Auto-ramping TGHT to 660 A @ 2 A per min. Vacuum @ 3.39e-06T. Temp @ 1851 C.  

Thursday, October 22, 2020, 13:25: Manually tap up TGHT until 1900 C. Vacuum @ 3.53e-06T.

Thursday, October 22, 2020, 13:30: TGHT @ 673 A. Temp @ 1903 C. Vacuum @  3.79e-06T.

Thursday, October 22, 2020, 14:00: Auto-cooling @ 1 A per min. 

Friday, October 23, 2020, 07:50: PS off. Turbo pump off. Purge waterline. 

Friday, October 23, 2020, 09:02: Venting. 

Friday, October 16, 2020, 11:30

 Target mounted in EVAP2. Pump down started

Friday, October 16, 2020, 12:05

Pressure goes up. Checked with Ferran and he says that the valve IEVAP2:RV1 automatically closes sometimes. WEIRD, to be chacked.

Friday, October 16, 2020, 15:20

IGP2 bottoms at 0.2T, and doesn't increase recover if I close RV1 while it shouldn't (as shown before). --> Vented to restart from scratch

Friday, October 16, 2020, 15:45

Pumped down again, vacuum went down to 0.16 and then started raising until ~0.18. This time the valve was open indeed! opening and closing the valve had no effect on the vacuum as if the  booster pump was not effective

Friday, October 16, 2020, 16:27

Tried a THIRD time, this time effectively, to turn the turbo ON. I managed to, but the turbo makes weird spinning sounds every ~30 sec. Moreover, its pumping down plot seems quite weird  - see spike UP while pumping. Could it be related to a dysfunction of the backing pump?

 2020-10-15 18:51 : Setup installed during the day. Pumped down to IGP1:1.5e-5T , water leak check ok. Ramping up to 100A. 

 2020-10-15 19:30 : A heating element was showing bad signs and failed very early. ramping down and venting. 

 2020-10-13 11:13 Target was left under vacuum over the weekend. IGP1: 1.6e-7T water on- leak check ok. Ramping up 2A/30s to 100A.

 2020-10-13 11:47 All ok at 100A. Ramping up, 1A/10s to 200A.

 2020-10-13 12:08 All ok at 200A. Temp tc on foil 200degC. Ramping up, 1A/10s to 300A.

 2020-10-13 12:08 All ok at 300A. Temp tc on foil 340degC. Ramping up, 1A/10s to 400A.

 2020-10-13 12:48 All ok at 400A. Temp tc on foil 474degC. pyro shows 1050degC Ramping up, 1A/10s to 500A.

 2020-10-13 13:06 All ok at 500A. Temp tc on foil 615degC. pyro shows 1238degC Ramping down, 1A/10s to 0A.

 2020-10-13 17:04 The foil has been replaced due to suspected radiation transparency being the cause of low measured temperatures. A graphite and tantalum pack is now attached. Vacuum is back to IGP1: 9.5e-6T. Ramping up to 100A, 1A/10s.

 2020-10-13 17:31 All ok at 100A. Temp tc on foil 80degC. Ramping up, 1A/10s to 200A.

 2020-10-13 17:31 All ok at 200A. Temp tc on foil 310degC. Ramping up, 1A/10s to 300A.

 2020-10-13 17:31 All ok at 300A. Temp tc on foil 468degC. Ramping up, 1A/10s to 400A.

2020-10-13 17:31 All ok at 400A. Temp tc on foil 598degC. Ramping up, 1A/10s to 500A.

2020-10-13 17:31 All ok at 500A. Temp tc on foil 700degC. Ramping up, 1A/10s to 600A.

2020-10-13 17:31 All ok at 600A. Temp tc on foil 760degC. Ramping down, 1A/20s to 0A.

2020-10-14 17:09 foils for radiation focusing have been replaced and doubled to reduce transmission. IGP1:1.5e-5T , water leak check ok. Ramping up to 100A 1A/10s.

2020-10-14 17:30 All ok at 100A. Temp tc on foil 60degC. Ramping up, 1A/10s to 500A. 

2020-10-14 17:50 All ok at 200A. Temp tc on foil 378degC. 

2020-10-14 18:10 All ok at 300A. Temp tc on foil 550degC. 

2020-10-14 18:10 All ok at 400A. Temp tc on foil 705degC. 

2020-10-14 18:10 All ok at 500A. Temp tc on foil 816degC.Ramping up, 1A/10s to 600A.

2020-10-14 18:10 All ok at 600A. Temp tc on foil 906degC.Ramping up, 1A/10s to 625A.

2020-10-14 18:10 All ok at 625A, IGP1: 1.3e-5T. Temp tc on foil 924degC.Ramping up, 1A/10s to 650A.

2020-10-14 19:21 All ok at 650A. Temp tc on foil 940degC.Ramping down, 1A/10s to 0A. Pyrometer on foil 1200degC

 2020-10-09 9:48 The target was installed the day before and left pumping over night. IGP1=4.7e-7Torr. leak check when water on, ok. Setting ramp up

 2020-10-09 10:16 Ramping up the target to 50A, 1.5A/30s. All good. Going to 200A same rate.

 2020-10-09 11:11 Target at 200A. Pyrometer 1170degC. ramping to 300A same rate. 

 2020-10-09 11:51 Target at 300A. Pyr. 1510. Ramping to 400A same rate.

 2020-10-09 12:27 Target at 400A. Pyr. 1820. Ramping to 500A same rate.

 2020-10-09 13:01 Target at 500A. Pyr. 2100. Ramping down to 0A 2A/30s.

 Wednesday, October 07, 2020

TP1 was not spinning up past 4krpm. Stalling & tripping out. Examined with Vacuum group, appears to be starting to seize. Exchange turbo pump.

Serial# 500937

Wednesday, October 07, 2020, 12:25: TP1 Exchanged. 

Wednesday, October 07, 2020, 12:38: Roughing. 

Wednesday, October 07, 2020, 13:55: Soft start initiated. Steps up krpm every 5 min. 10 steps.

Wednesday, October 07, 2020, 13:22 @ 24 krpm.  

Wednesday, October 07, 2020, 13:42: TP1 at speed. 38 krpm. 

Wednesday, October 07, 2020, 13:45: TP1 off. Soft start function off. Remote start configuration initiated. TP1 on. OK. 

Ta#61 LP-SIS target description:

Total Ta foils = 470 [6x20 packs + 350 single discs]

Foil Thickness = 0.025mm

Target density =  12.76 g/cm3

Target length = 3.4 cm

Total Mass = 43.388 g [Incl foils + Ta wire on 6 packs]

Total mass w/ Target oven=  464 g (w/ end caps)

Discs in target are arranged as follows: 1pack / 100 singles / 1pack / 75 singles / 2packs / 75 singles / 1pack / 100 singles / 1pack

End caps installed (not yet expanded). No Ta foil heat shield added 

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

TGHT will be ramped up to 600A + at 2.0A/min.

Final desired temperature = 1900C.

OMEGA slope = 0.98.

Tuesday, October 06, 2020, 14:17: Roughing.

Tuesday, October 06, 2020, 14:36: Turbo pump on.

Tuesday, October 06, 2020, 14:43: Turbo pump not spinning up. Holding at 4 krpm. Will need to vent and Troubleshoot in the am.  

Attempted to run the turbo pump again. Only runs to 4 krpm. Shut down to avoid trip. Vent & remove Flex-line HS. Change all the SS gaskets. Re-install Flex-line HS w/ Ta#61.

Wednesday, October 07, 2020, 09:16: Roughing. 

Wednesday, October 07, 2020, 09:32: Turbo pump on. 

Wednesday, October 07, 2020, 10:05: Multiple attempts made to spin up the turbo pump. TP1 holds at 4 krpm, occasionally to 5 krpm, times out & trips. 

Wednesday, October 07, 2020, 10:08: Shut off TP1 & backing pump. 

Replaced TP1. https://elog.triumf.ca/TIS/Evaporator_2/514

Wednesday, October 07, 2020, 13:45: TP1 off. Soft start function off. Remote start configuration initiated. TP1 on @ 38krpm. OK. 

Wednesday, October 07, 2020, 13:47: Vacuum @ 1.31e-05T.

Wednesday, October 07, 2020, 13:49: Waterlines opened. Vacuum ok @ 1.27e-05T.

Wednesday, October 07, 2020, 13:50: PS switched on. 

Wednesday, October 07, 2020, 15:24: Slope set @ 0.98. Vacuum @ 3.30e-06T.

Wednesday, October 07, 2020, 15:26: TGHT / TBHT on. Manually tap up to 10 / 10 A.

Wednesday, October 07, 2020, 15:28: Auto-ramping TGHT / TBHT to 300 / 150 A @ 2 / 1 A per min. 

Thursday, October 08, 2020, 05:23: Vacuum @ 7.00e-07T. 

Thursday, October 08, 2020, 05:25: Auto-ramping TGHT / TBHT to 450 / 200 A @ 2 / 1 A per min. Temp @ 996 C

Thursday, October 08, 2020, 06:44: Auto-ramping TGHT / TBHT to 550 / 230 A @ 2 / 1 A per min. Temp @ 1426 C

Thursday, October 08, 2020, 07:43: Vacuum @ 3.88e-06T. Temp @ 1685 C. 

Thursday, October 08, 2020, 07:45: Auto-ramping TGHT to 600 A @ 2 A per min.

Thursday, October 08, 2020, 08:42: Auto-ramping TGHT to 630 A @ 2 A per min. Vacuum @ 4.01e-06T. Temp @ 1800 C. 

Thursday, October 08, 2020, 09:07: Auto-ramping TGHT to 645 A @ 2 A per min. Vacuum @ 4.91e-06T. Temp @ 1851 C.  

Thursday, October 08, 2020, 09:19: Auto-ramping TGHT to 655 A @ 2 A per min. Vacuum @ 5.37e-06T. Temp @ 1879 C.   

Thursday, October 08, 2020, 09:28: TGHT @ 650-657 A. Vacuum @ 5.70e-06T. Temp @ 1901 C. Desired temperature reached*

Thursday, October 08, 2020, 09:59: TGHT @ 650-657 A. Vacuum @ 4.64e-06T. Temp @ 1903 C.

Thursday, October 08, 2020, 10:01:  Auto-cooling TGHT / TBHT @ -3 / -2 A per min. 

Thursday, October 08, 2020, 13:57: TP1 / PS off.

Thursday, October 08, 2020, 14:08: Venting. 

Thursday, October 08, 2020, 14:15: Flex-Line HS removed w/ Ta#61. 

Monday, September 28, 2020, 11:49

6 discs of np-SiC were loaded to the target boat wrapped with 3 layers of heat shields.

Desired temperature at 1500 C, (As per e-log 414/416, TGHT = 450A/7.31V, 3.28kW) 

Omega slope set at 1.05 (for carbide)

Good vac = 3.0e-5 Torr,

Bad vac = 5.0e-5 Torr.

Pumping down in progress

 Monday, September 28, 2020, 21:44

Pressure at 1e-6 Torr.  Initiated autoramping at 0.2A/min to reach 300 A.  Monitor temp.

 Wednesday, September 30, 2020, 11:39

TGHT reached to 300 A/ 4.5V, temp at 1130 C.  No coating on windows.

Continue to ramp up 330A.  Monitor temp.

 Wednesday, September 30, 2020, 16:38

TGHT reached 330 A / 5.04 V, temp at 1190 C. 

Ramp up to 400 A. Current pressure at 9.8 e-7 Torr.

Thursday, October 01, 2020, 10:28

TGHT reached 400 A/ 6.3V, temp at 1320 C.  Continue to ramp up to 450 A.

 Thursday, October 01, 2020, 16:44

TGHT reached to 450 A/ 7.4 V.  TEmp at 1500 C. 

Pressure at 1.35 e-6 Torr and coming down.   Continue to hold TGHT at 1500 C for at least 24 hr.

 Sunday, October 04, 2020, 16:49

TGHT has been holding at 450 A/ 7.3 V for nearly 3 days; temp has gone up and stabilized at 1554 C; pressure at 2.13 e -7 Torr.

Initiated cooling down at -2A/min.

 Monday, October 05, 2020, 10:02

Chamber vented.

Darwin Ortiz Rosales wrote:

Friday, September 25, 2020, 10:30  Target boat with a layer of niobium foil on the bottom is used to heat up Nb samples to 1400 C for 4 hrs. OMEGA slope = 0.99 The niobium samples are wrapped in two layers of  Nb foil. Boat is wrapped with 2 layers of Ta foil, careful to avoid touching samples.  Friday, September 25, 2020, 10:35 Manually ramped TGHT to 40 A and kept at that current for approximately 15 minutes.   Then started autoramp at  1A/min up to 100 A  Friday, September 25, 2020, 16:58 IPG1= 4.7e-07 Torr TGHT =100.0 A, 1.3 V Start autoramp to TGHT to 300 A  @ 2A/min  @ 300A temperature = 1179 C   Friday, September 25, 2020, 20:00  autoramp to 345 A  Friday, September 25, 2020, 20:39 TGHT = 345 A, 5.4 V OMEGA = 1296 C IPG1= 8.1 e-07 Torr Ramp manually to 1400 C  Friday, September 25, 2020, 20:51 reached 1400 C on OMEGA at TGHT = 476 A Friday, September 25, 2020, 20:59 OMEGA increased to 1410, lowered TGHT to 468 A to get back to 1400 C on OMEGA  Friday, September 25, 2020, 21:40 Lowered TGHT to 463 A,  5.79 V to bring OMEGA to 1400 C from 1404 C  Saturday, September 26, 2020, 00:51 Sample has been at 1400 C for 4 hours. IGP1= 7.2 e-07 Torr Cooling at- 2A/min

 Monday, September 28, 2020, 09:36

Vented chamber - for Darwin.