Wednesday, April 17, 2019, 09:03

An uncoated target container was loaded with a graphite insert and wrapped with 3 tantalum layers,

Two Ta caps were used

EVAP2 was pumped down, IGP1 = 5.14e-7 Torr

 The TGHT and TBHT current was tapped to 40 A manually

Autoramp was set to TGHT 1A/min to 500 A

and TBHT 0.5A/min to 230 A.

The temperature reached 2000 C as planned 

the target container stayed at that temperature for 1 week.

Tuesday, April 23, 2019, 10:00

EVAP2 was vented and the target container was removed.

The container crystalized but did not break.

Tuesday, June 14, 2022, 08:47

Ta HP-FEBIAD was coated with TaC and wrapped with Ta heat-shields (3 layers)

Desired temperature = 1800 C , TBHT will be set fixed at 230A (max).

Evap 2 will be pumped down over previous night

OMEGA slope= 0.990

Good vacuum = 3.00 e-4 Torr

Bad vacuum = 5.00 e-2 Torr

IGP1= 1.2 e-06 Torr

Start autoramp @2A/min to 80 A then autoramp heat @1A/min to 150 A.  Then autoramp TGHT to 675A and TBHT to 230A.

Tuesday, June 14, 2022, 08:49

IGP1= 0.13 Torr

*had timed out and it was off.  I RST and turned back on.*

Will wait for the pressure to drop to start heating

 Tuesday, June 14, 2022, 09:36

IGP1= 9.4e-06 Torr

Start autoramp @2A/min to 80A

Tuesday, June 14, 2022, 11:27

IGP1= 8.7 e-06 Torr Trending down. 

TGHT= 146A, 1.6V

TBHT= 146A, 1.7V

Has been ramping at 1A/min

Change ramp rate to 2A/min to 700A on TGHT and 230A on TBHT

Tuesday, June 14, 2022, 14:48

Change final current on TGHT to 675A, according to plot.  May change again. 

Currently TGHT=  537A, 7.7V 

IGP1= 4.4e-06 Torr

Tuesday, June 14, 2022, 18:46

Top temperature was 1825 Celsius at TGHT = 675A

Will start rampdown at 8:00 pm

 Tuesday, June 14, 2022, 20:01

TGHT= 675A, 10.3 V

TBHT= 230A, 3V

OMEGA= 1815C

IGP1= 3.9e-06 Torr

ramping down @-2A/min TGHT and -1A/min TBHT

Tuesday, June 21, 2022, 09:43

Total number of foils: 377 ( including 6 analysis discs on the right side of the container)

Total weight = 1454 g (includes heatshields, spring and T bar)

Total length packed 15.5 cm (excluding 6 analysis discs that will be removed)

container has 3 Ta heat shields and is coated

No endcaps inserted to facilitate out-gassing

Ta coated spring at  front (right) side

Initially to ramp TGHT and TBHT to 80A at 2 A/min

then to 120A and slow down ramp when pressure begins to increase

max approx 675A on TGHT and 230A on TBHT (Omega slope set = 0.990)

Then temperature = 1800C

TBHT will be set fixed at 230 A (max).  TBHT heated manually and automatically to max.

Good vac at 3.00 e -4 Torr

Bad vac at 5.00 e-2 Torr

 IGP1=3.6 e-07 Torr at start of initial ramp.

Tuesday, June 21, 2022, 13:54

IGP1= 7.1 e-05 and dropping.  Start ramp to 150A for both TGHT and TBHT @1A/min

Tuesday, June 21, 2022, 21:27

Increased ramp rate to 3A/min for TGHT to 675A

Tuesday, June 21, 2022, 22:38

Ramp up to 685 A on TGHT and leave for 4 hours. 

OMEGA = 1645 C but suspect reading not on Ta surface.

Wednesday, June 22, 2022, 02:28

IGP1=7.7e-6 Torr

OMEGA =1610C

TGHT = 685A, 10.5V

TBHT = 230A, 3V

initiate rampdown at -2A/min and -1Amin TGHT and TBHT

Thursday, July 19, 2012, 16:58

The target container was coated with TaC. 

It's wrapped with 3 layers of Ta as the heat-shield, including the backblock.

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

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

Currently, IGP1 = 1.5e-6 Torr.  BP = 15mTorr

 Friday, July 20, 2012, 13:56

TGHT and TBHT reached to 580A & 230A, respectively, and stayed for ~ 2hrs. 

Measured temperature at the ionizer tube to be 1630C.

Cooling down in process at 2A/min...

 Sunday, July 22, 2012, 20:53

The chamber was vented earlier around 14:00hr.  

The target container looks good! 

Wednesday, May 01, 2024, 11:53

The coated container was wrapped in 4 Ta foil heatshields.

Vacuum IGP1 initial =8.1 e-06 Torr

Target temperature on OMEGA= 1850-1900 C

OMEGA slope:= 0.990

Target time at max temperature = 4 hours

Final Current TBHT= 230 A

Final TGHT current= ~500A (adjustable)

Heating autoramp starged at 3A/min(1A/30s) on  TGHT  100A

Then at 2A/min  to =400 A TGHT and 230A TBHT

Good vacuum = 5.0 e-04 Torr

Bad vacuum = 5.0E-02 Torr

Wednesday, May 01, 2024, 22:19

1830C reached at 670A. 10.0V TGHT

Start cooling after 4 hours. 

Thursday, February 07, 2019, 14:12

Tantalum tube coated with TaC and wrapped with 3 layers of Ta heat-shielding.

Desired temperature= 1900 Celsius (expected TGHT ~445A/7.5V)

EVAP2 Currently pumped down, heating will be initiated tomorrow.

Friday, February 08, 2019, 08:46

Current pressure IGP1 = 3.46e-07 Torr

Manual tapping to 50A on TGHT

TGHT 47.43A, 0.26V

Waiting for pressure to stabilize.

Pressure was going down so current was increased manually to 65 A to induce the outgassing.

TGHT 73.9A, 0.67V

MAx pressure IGP1 = 4.41e-6 Torr

After approx 1 hour

TGHT = 0.70 V  74.1 A

IGP1 = 1.63 e-6 Torr

Autoramp was set to 2 A/min for final current of 350 A

 Friday, February 08, 2019, 13:43

Autoramp TGHT reached 350 A /5.47 V, current temperature at 1660 Celsius

IGP1 = 3.0e-06 Torr/coming down

Increase TGHT to 400 A autoramp at 2A/min

 Friday, February 08, 2019, 14:39

TGHT reached 413 A, 6.8 V, pressure at 1.9 e-06 Torr coming down

Continue to tap up TGHT to reach 1900 C

Friday, February 08, 2019, 14:56

TGHT manually increased to 428 A, 7.18V, pressure at 2.0e-06 Torr coming down slowly

Temperature at 1903 C

Will continue to heat at ~1900 C for four hours before cooling down

 Friday, February 08, 2019, 21:00

TGHT 7.21 V, 429.75 A, 1873 C

IGP1 6.77e-7 Torr

The heater ramp is set to -2 A/min to 0 A.

 Monday, October 25, 2021, 11:52

Ta IGLIS tube was coated with TaC and wrapped with Ta heat-shields (3 layers)

Desired temperature = 1900 C (expected TGHT ~430 A), TBHT will be set fixed at 230A (max).

Evap 2 will be pumped down over previous night

Good vacuum = 3.00 e-3 Torr

Bad vacuum = 5.00 e-2 Torr

Initial total weight = 439.0 g

Final weight after sintering = 438.8 g

Tuesday, October 26, 2021, 07:18 

IGP1= 9.2 e-07 Torr

Will ramp to 50A at 1A/min on both TGHT and TBHT.

Tuesday, October 26, 2021, 08:37 

IGP1= 3.0 e-05 Torr

TGHT= 50.2 A, 0.6 V

TBHT = 49.4 A, 0.5 V

Will allow pressure to drop further then start further ramp up

Tuesday, October 26, 2021, 14:36

TGHT =  100 A, 1.3 V

TBHT = 99 A, 1.0 V

IGP1 = 3.e-5 Torr

ramp up TGHT to 400 A and TBHT to 230 A at 1.5 A/ min

Tuesday, October 26, 2021, 18:46 

 Will keep at 430A on TGHT and 230A on TBHT for 4 hours.

OMEGA reading = 1653  C is suspicious based on previous coating.  

Tuesday, October 26, 2021, 23:05

TGHT = 430.5 A, 6.9 V

TBHT = 232.09A, 2.8 V

IGP1= 8.8e-06 Torr

Start cooling THGT at -2A/min and TBHT at -1A/min 

Evaporator #2 is still under construction.  For further information please contact Jens Lassen.

Rick mentioned to me that the evaporator is ready for the next steps of the commissioning process.
In the chamber only the target leg heaters have current by-pass clamps on them. 
The ionizer tube heaters do not have them because these lines do not have the same configuration as the others. The current by-pass clamps will 
not fit these lines.

We may not need this for the commissioning, Rick will design and manufacture something  for this when I get back from holiday.

The water is on in all circuits except for the power supply cooling circuit.

Pierre

 Monday, February 13, 2012, 16:21

The Evaporator 2 is now commissioned.  See attachment#1 for the commissioning report or refer to Document #43321.  

Thursday, March 01, 2012, 14:35

Both the IEVAP2:TBHT and IEVAP2:TGHT maximum current setpoints on the vacuum page (see page: /edl/ievap2_vacuum1.edl) are wrong. 

For IEVAP2:TGHT, the maximum current setpoint should be 1500A (see page: /edl/ievap2tghtcp.edl), not 1000A. 

For IEVAP2:TBHT, the maximum current setpoint should be 500A (see page: /edl/ievap2tbhtcp.edl), not 300A. 

See attachement#1 for grabscreen. 

Fault: 5853

 Tuesday, March 20, 2012, 14:22

The Evaporator #2 backing pump (IEVAP2:BP1) muffler has not connected to the exhaust duct.

 See attachment#1 as to where the muffler should be connected to the exhaust ducting system.  

The Evaporator chamber is currently under vacuum; the BeO sintering process will be pending for now until the backing pump is properly installed. 

(ISAC E-fault 5880) 

 Wednesday, March 21, 2012, 13:55

Edi Dalla Valle is connecting the evaporator backing scroll pump exhaust to the existing nuclear exhaust. (See attachment#2: scroll_pump_exhause.jpg).  A filter is also added between the exhaust line 

to prevent any back flow of oil from the Evaporator #1 backing pump (An oil pump). 

Work is covered under ISAC WP# 2012-03-21-3.

The evaporator is now operational. 

 Tuesday, May 15, 2012, 13:45

It was discovered that one of the insulators that supported the target module broke apart (see Attachment#1).  This might be caused by the heat from the target legs that reflected back from the base to the insulators.  The burnt marks are the evidence.  

A stainless metal sheet is used as the heat shield  (see Attachment #2). 

 Tuesday, May 15, 2012, 17:00

It was found that there were water droplets from the TBHT cooling line.  The joint is leaky.  (see attachment 1) 

A message has sent to Rick M. 

 Tuesday, May 15, 2012, 17:03

The tube heater power supply current readback and setpoint are not matching.  Ray Dube checked the power supply and confirmed that it is faulty.  He will replace a functional p/s tomorrow. 

 Friday, May 18, 2012, 13:24

The original p/s was replaced with a new one and there was still a discrepancy between the readback and the setpoint.  After checking with the drawings for the ITE/ITW tube heaters, it was confirmed that the connections for the Evap#2 tube heater control were wrong.  (see attachment 1).  The connections were corrected and the power supply is now operational. 

John Wong wrote:

Tuesday, May 15, 2012, 17:00 It was found that there were water droplets from the TBHT cooling line.  The joint is leaky.  (see attachment 1)  A message has sent to Rick M.

 Wednesday, May 16, 2012, 14:01

The connector was re-tighten.  The water valve was opened, and no water leaks were found.

Monday, May 28, 2012, 11:08

It was discovered this morning that the Evaporator #2 chiller was leaking water from the bottom (see attachment 1).  A puddle of water was formed and eventually found its way down to the Hotcell. 

The evaporator was running over the weekend for the BeO pellets process.  The TGHT is now off and the chiller will be inspected... 

Monday, July 30, 2012, 15:38

The evaporator was used for the processing the NiO target for 8 days and it was discovered today that there was a puddle of water underneath the chiller. 

The cover of the chiller was removed and some water around the plumbing was found (see attachment #1). 

Will continue to keep running the chiller to see if there is more water leaking out...

 Friday, August 10, 2012, 19:54

Target boat with TaC coating, inside covered with a 0.002 inches thick Ta foil, wrapped with a 0.002 inches thick Ta foil, contains a Ta foil with TaO coating.

See John's Ipad for their recipes.

Evaporator #2 is now auto-ramping overnight at 0.2 A/min, up to 830 A, with the maximum voltage limited at 14 V, between 2.00e-05 (Good vacuum) and 3.00e-05 Torr (Bad vacuum).

Nikita Bernier wrote:

Friday, August 10, 2012, 19:54   Target boat with TaC coating, inside covered with a 0.002 inches thick Ta foil, wrapped with a 0.002 inches thick Ta foil, contains a Ta foil with TaO coating. See John's Ipad for their recipes. Evaporator #2 is now auto-ramping overnight at 0.2 A/min, up to 830 A, with the maximum voltage limited at 14 V, between 2.00e-05 (Good vacuum) and 3.00e-05 Torr (Bad vacuum).

 Saturday, August 11, 2012, 19:15

Heating process was going smoothly up to 400 A. See Attachment 1.

Around 420 A, vacuum went up again and the voltage increased more quickly. It seems like resistance is building up. After reaching 530 A, the current was tapped down to 420 A in an effort to save the Ta boat. See Attachment 2.

The current will stay at 420 A for the weekend until John takes a look at this.