Thursday, January 23, 2014, 16:26 

 A new target boat was sprayed with TaC coating and let dry, the coating appeared slightly bubbly once dried [see attached photos].

The target boat was wrapped with 3-layers of Ta-heat shield.

The boat was installed in Evap#1, chamber is currently being pumped down overnight.

Laura Lambert wrote:

Thursday, January 23, 2014, 16:26   A new target boat was sprayed with TaC coating and let dry, the coating appeared slightly bubbly once dried [see attached photos]. The target boat was wrapped with 3-layers of Ta-heat shield. The boat was installed in Evap#1, chamber is currently being pumped down overnight.

 Friday, January 24, 2014, 14:42

Chamber was pumped down to 5.9e-6 Torr overnight.

TGHT was stepped up to 35A.

Waited 20min, vacuum consistently stable, auto-ramp initiated at 0.2A/min and max setpoint to 580A.

Good vacuum: 5e-5 Torr. Bad vacuum: 6e-5 Torr.

Laura Lambert wrote:

Laura Lambert wrote: Thursday, January 23, 2014, 16:26   A new target boat was sprayed with TaC coating and let dry, the coating appeared slightly bubbly once dried [see attached photos]. The target boat was wrapped with 3-layers of Ta-heat shield. The boat was installed in Evap#1, chamber is currently being pumped down overnight.    Friday, January 24, 2014, 14:42 Chamber was pumped down to 5.9e-6 Torr overnight. TGHT was stepped up to 35A. Waited 20min, vacuum consistently stable, auto-ramp initiated at 0.2A/min and max setpoint to 580A. Good vacuum: 5e-5 Torr. Bad vacuum: 6e-5 Torr.

 Monday, January 27, 2014, 11:01

TGHT reached 580A over the weekend.

TGHT auto-cooldown initiated at 2.0A/min.

 Tuesday, January 28, 2014, 15:51

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

Target boat looks good! [See attached photos]

 Monday, March 09, 2015, 16:55

After upgrading IOC for CXML program, experienced some issues; therefore, switched to same software as EVAP2.

Testing new software.

Chamber currently pumping down.

 Tuesday, March 10, 2015, 10:46

Chamber pumped down.

Initiated auto-ramp - not working, compilation errors...

 Tuesday, March 17, 2015, 11:47

Keiko fixed software update and rebooted IOC.

Everything seems to be working now.

 Thursday, September 21, 2017, 11:32

Copper plate attached to TBHT to allow current to be applied.

Started pumping down this a.m.

Roughing pump sounds normal.

Currently Ion Gauge times out before turning on, will attempt again later when lower vacuum achieved...

 Monday, September 25, 2017, 13:30

Ion Gauge hadn't been fully hooked up via eipcs yet.

Ramped down last week/ vented/ hooked up ion gauge in epics/ restarted IOC - now updated and good to go.

Started pumping down again this a.m.

Roughing pump sounds normal.

Ion gauge working well!

IGP1 = 2.7e-5 Torr

 Wednesday, September 27, 2017, 09:20

Cooled down, vented in air and opened up yesterday.

TBHT ran well -  readout on power supply and readout on striptool were very close.

Roughing pump ran smoothly - nothing other than usual problems.

Sometimes when roughing pump is 1st turned on it chokes up and sounds TERRIBLE. At this point if you turn it off and leave it for a few seconds then try turning it on again it usually works fine.

Ion gauge ran well - direct readout vs striptool readout are slightly off because the direct readout is in mBar and the striptool in Torr.

One minor thing noticed with the new ion gauge - when water is turned on the vacuum increases very minorly by ~5e-8 Torr.

This wouldn't show up with the old Ion Gauge - maybe the new one is slightly more sensitive?

Otherwise everything ran great 

 Tuesday, November 07, 2017, 14:34

LP-FEBIAD used several years ago for temperature measurements is used for this test.

3xTa heat shields on container, incl center block - these heat shields have remained on there since the last round of tests in 2014?

Old version of LP container with larger center block.

Will heat TBHT to 290A and report data.

Loaded into evap1 and pumped down this a.m

IGP1 = 7.73e-6 Torr

Wednesday, November 08, 2017, 13:20

Tapped up to 290A manually.

TBHT epics controls = 287.7A, 2.45V

TBHT power supply = 290.4A, 2.46V

IGP1 epics = 2.51e-6 Toor

IGP1 direct readout = 3.18e-6 Torr

TP = 26.1C

Initiating auto-cool at 2.0A/min

 Thursday, November 09, 2017, 11:41

Vented in air.

TBHT test went well. 

See attachment for data collected.

 Wednesday, February 28, 2018, 15:19

Last two rounds of materials in evap1 have tripped off the TGHT in epics within minutes of the target reaching 520A.

Loaded an empty target boat, no heat shields.

Will ramp up with same speed as last two samples to see how TGHT reacts and whether a trip is induced or not.

Currently pumping down now.

 Thursday, March 01, 2018, 13:53

IGP1 = 9.6e-7 Torr

Tapped up to 100A @ 1.0A/s, waited ~6min

IGP1 = 1.77e-6 Torr

Tapped up 40A/min to 140A, waited ~2min

Tapped up 40A/min to 180A, waited ~2min

Tapped up @ a rate of 1.0A/s for 40sec, then wait 20sec. Used this rate consistently up to 520A.

TGHT = 520A, 5.75V

Friday, March 02, 2018, 10:09 

TGHT = 520A, 5.81V this morning.

TGHT still on! 

No trip induced.

IGP1 = 1.7e-6 Torr.

Initiating auto-cool at 2.0A/min

 Thursday, March 05, 2018, 14:07

Container removed, test complete.

Wednesday, January 22, 2020, 18:07

A P2N container  with no heat shields, and no graphite container was installed in the EVAP1

Chamber is currently being evacuated.

 Thursday, January 23, 2020, 09:45

Pressure IGP1=1.87e-6 Torr

Final desired current TGHT = 600 A

Manually tapped to 40 A

 The voltage looks ok, at 32 A the voltage's behavior change (see picture "voltage at 32 A") but is stable

Thursday, January 23, 2020, 13:20

Autoramp is set to 4/30s to 300 A 

The voltage and vacuum were stable so the autoramp was kept at 4/30s and the final current was set to 600 A

At 600 A the voltage was 2.4 V, the current and voltage remained stable for 1 hour (see figures 600A and 600A-zoomed)

Thursday, January 23, 2020, 15:57

The current was ramp down to 0 A  at -5A/20s 

Thursday, January 23, 2020, 16:36 

After 10 min at 0A, the current was ramp up to 600 A at 4A/30s.

At 600 A the voltage was 2.43 V (TGHT)

The container was left at 600 A overnight.

Friday, January 24, 2020, 10:51

The PN2 stayed at 600 A for 15 hrs

The voltage increased 0.1 V during the first 7hr at 600 A and then it stabilized at 2.5 V (see figure "second ramp voltage")

Friday, January 24, 2020, 10:57

The current was ramp down to 0A at -5A/20s  

Tuesday, January 28, 2020, 10:11

A P2N container  with heat shields, and without graphite container was installed in the EVAP1

Chamber is currently being evacuated.

Wednesday, January 29, 2020, 10:12

Pressure IGP1=1.87e-6 Torr

Final desired current TGHT = 600 A

Manually tapped to 40 A.

Voltage increased accordingly in an stable way.

Wednesday, January 29, 2020, 10:33 

Autoramp is set to 3/30s to 300 A 

The voltage and vacuum were stable so the autoramp was kept at 4/30s and the final current was set to 600 A

Accidentally went up to 600 A (1.98 V)!

When updating autoramp to 600 A, did not realize that procedure status was Active.

NOTE: If the procedure status is "active" the heater autoramp, does not "ramp" the current input in "final value", it will go in one step to that current.

The current was manually ramp down to 300 A

TGHT=299.52A, 0.89 V

Wednesday, January 29, 2020, 13:25

After approximately 2 hours conditions IGP1=1.6e-6Torr, TGHT =300 A, 1V.

The current ramp was started again: 4A/30s  to final value of 600 A

 Wednesday, January 29, 2020, 14:07

After 15 min, TGHT=599.424A, and 1.983 V (unstable) (see figure "P2N-test2_final voltage")

The current was ramp down to 0 A  at -5A/20s 

EVAP1 was vented with aair and the container was removed,

the copper shims and legs did not present signs of damage

the body's tantalum sheet had wrinkles inside,

the tantalum foils unfasten a bit, but were adjusted.

Thursday, October 25, 2012, 14:50

Previous sintering BeO tests, pellets 1 to 4 were done in Evaporator#2.

3 BeO pellets were made.  Each weights about 1.3g (including org mass). 

A piece of Re foil (0.002" thick) is used as the under layer to protect the reaction between Be(g) and the Ta-boat.  (see attachment#1)

Another layer of Ta-foil is used as the heat-shield to wrap around the Ta-boat.

The chamber is currently being pumped down. 

TGHT will be ramped up to 600A (~1360C) at 0.2A/min.

The pressure, voltage and current will be closely monitored. 

If the Ta-boat survives, the TGHT will continue to ramp up to max 800A (~1580C).

 Friday, October 26, 2012, 11:15

Chamber has been pumped down over night. 

IG1 @ 8.93e-6 Torr. 

Auto-ramping parameter:

Good Vac @ 2.0e-5 Torr, Bad Vac @ 3.0e-5 Torr.

rate @ 0.2A/min. 

 Tuesday, October 30, 2012, 10:57

TGHT has reached to 370A. The organic binder has burnt off. 

The pressure came down to  6.6e-6 Torr, but it is slowly going up to 8.6e-6 Torr (something is outgassing... Dissociation of BeO --> Be(g) + O(g) ?).  BP @ 39mTorr.  (see attachment#2).

 Wednesday, October 31, 2012, 12:07

TGHT has reached to 600A/6.338V for just over 6 hours.  IG is slowly coming down fro 1.2e-5 Torr.  BP @ 38mTorr. (see attachment #3)

 Wednesday, October 31, 2012, 16:49

Vacuum is coming down to 8.49e-6Torr.  TGHT has stayed at 600A/6.24V for over 11hrs.  (see attachment #4)

Auto-cooling initiated at 1A/min. 

The chamber will be vented tomorrow and the material will be inspected.

 Thursday, November 01, 2012, 10:57

TGHT has reached to 0A.  Vacuum holding at 1.9e-6Torr.

Turning off P/S and pumps prior to venting chamber.

March 23, 2011

12:30: Target oven is wrapped with 3 Ta-heat shields.  Pumping down evaporator

18:24: IEVAPIG1 is reading at 4.55e-6 Torr.  The p/s will be turned on tomorrow since there is no ISAC Ops on site. 

March 24

11:57: Evaporator has pumped down over night.  Vacuum @ 2.01e-6 Torr.  

14:42: TGHT @ 20A, Vac @ 1.65e-6 Torr.

14:52: TGHT @ 40A, Vac @ 1.66e-6 Torr.

14:52: Auto Heating begins: TGHT to max 820A.  Incrementing if vac < 4.5e-5 Torr, backing off if vac > 6.5e-5 Torr.

 16:04: TGHT @ 181A, vac @ 7.59e-6 Torr.

18:03: TGHT @ 420A, vac @ 4.71e-6 Torr.   (See attachment 2 for TGHT/IG1 for the past 4 hours)

March 25,

11:15:  TGHT has been at 820A for 14hr.  Vac @ 4.27e-6 Torr.  (See attachement 3 for TGHT/IG1 for these past hours)

11:17:  Auto cooling down is in progress...

17:21:  Auto cooling down ended at TGHT ~100A.  The TGHT was tabbed down manually from 100A to zero.  (See attachment #4 for the cooling down progress)

John Wong wrote:

March 23, 2011 12:30: Pumping down evaporator 18:24: IEVAPIG1 is reading at 4.55e-6 Torr.  The p/s will be turned on tomorrow since there is no ISAC Ops on site.  March 24 11:57: Evaporator has pumped down over night.  Vacuum @ 2.01e-6 Torr.   14:42: TGHT @ 20A, Vac @ 1.65e-6 Torr. 14:52: TGHT @ 40A, Vac @ 1.66e-6 Torr. 14:52: Auto Heating begins: TGHT to max 820A.  Incrementing if vac < 4.5e-5 Torr, backing off if vac > 6.5e-5 Torr.  16:04: TGHT @ 181A, vac @ 7.59e-6 Torr. 18:03: TGHT @ 420A, vac @ 4.71e-6 Torr.   (See attachment 2 for TGHT/IG1 for the past 4 hours) March 25, 11:15:  TGHT has been at 820A for 14hr.  Vac @ 4.27e-6 Torr.  (See attachement 3 for TGHT/IG1 for these past hours) 11:17:  Auto cooling down is in progress... 17:21:  Auto cooling down ended at TGHT ~100A.  The TGHT was tabbed down manually from 100A to zero.  (See attachment #4 for the cooling down progress)

 All the pumps are off.  The evaporator will be vented next week. 

John Wong wrote:

John Wong wrote: March 23, 2011 12:30: Pumping down evaporator 18:24: IEVAPIG1 is reading at 4.55e-6 Torr.  The p/s will be turned on tomorrow since there is no ISAC Ops on site.  March 24 11:57: Evaporator has pumped down over night.  Vacuum @ 2.01e-6 Torr.   14:42: TGHT @ 20A, Vac @ 1.65e-6 Torr. 14:52: TGHT @ 40A, Vac @ 1.66e-6 Torr. 14:52: Auto Heating begins: TGHT to max 820A.  Incrementing if vac < 4.5e-5 Torr, backing off if vac > 6.5e-5 Torr.  16:04: TGHT @ 181A, vac @ 7.59e-6 Torr. 18:03: TGHT @ 420A, vac @ 4.71e-6 Torr.   (See attachment 2 for TGHT/IG1 for the past 4 hours) March 25, 11:15:  TGHT has been at 820A for 14hr.  Vac @ 4.27e-6 Torr.  (See attachement 3 for TGHT/IG1 for these past hours) 11:17:  Auto cooling down is in progress... 17:21:  Auto cooling down ended at TGHT ~100A.  The TGHT was tabbed down manually from 100A to zero.  (See attachment #4 for the cooling down progress)  All the pumps are off.  The evaporator will be vented next week.

 Evaporator Vented.

According to Jonathan Aoki, the electricians will be servicing another MCC which will result in loss of cooling water for about 8 hours starting at 16:00 March 30.  We shouldn't be running the evaporator or any condensers at that time.

It's the NON-ACTIVE water that will go off.  The evaporator is on sity water, so it will be OK.

The evaporator ion gauge filament burnt out on May 11, 2011.  A target was in the evaporator at that time and was about to being the sintering process.  The gauge had two filaments, so vacuum group helped to switch to the second filament.  The evaporator was vented on May 17, 2011, and a new ion gauge with two filaments was installed.  The gauge was tested and it's working fine. 

Monday, May 14, 2012, 15:04

Due to the differences in the use of the graphite foils in past SiC targets (C-grv foil from Alpha Aesar) and the newly prepared SiC#27 (C-grv foil from Ceramaterial), the out-gassing period for SiC#27 took over 6 days compared to 3 days for the vacuum to come down (see https://elog.triumf.ca/TIS/Evaporator_1/47). 

A few pieces of the new graphite foil is loaded on the target boat to test the out gassing reaction. 

The Evap #1 chamber has been pumped down to low 10e-5. 

Set to same parameter, see attachment#1

Initiated auto heating...

 Tuesday, May 15, 2012, 14:46

The target heater was ramped up to 820A.  There was so much out gassing as the temperature was increased.  The voltage did not hold at that current and the target heater was tripped off after the midnight.  (see attachment #2)

After the chamber was vented, it was discovered that the target boat's legs were bent due to over heating.  Both end of the targets where they touched the base got vaporized.  The boat was also got squeezed.  (see attachment #3).  

However, the heated graphite foils (~1600C at 820A) looks pretty good.  As per the supplier, CeraMaterials, the graphite was treated to 2000C.  See attachment #4 for the certificate.

 Tuesday, June 12, 2012, 14:38

The backing pump oil was changed (ISAC WP#2012-06-12-1). 

Work covered under work permit 2013-11-01-3 and performed by Anders and Rick with the help of Danno (RPG).

No significant contamination was found during the work. The old window could be disposed as normal waste.

The right connector for the TGHT had rotated. It has now been repositioned and both connectors have been tightened to reduce the chance for further rotation.