Tuesday, November 07, 2017, 11:58

Noise levels were checked with monitor by Terry.

Max readings in lab reached ~83dB but sat between 70-78dB in most areas.

This is under limit for requirement to wear ear protection [85dB].

To reach limit - noise levels would need to increase drastically.

Conclusion: ear protection not required in lab.

Recommended if working in there for long periods of time for personal preference, but not a requirement.

 Wednesday, November 22, 2017, 11:05

Eye wash installed yesterday, simple attachment on sink spout.

Easy to use, simply twist attachment 180 degrees.

Water for tap can be turned on before or after twist.

Adjust pressure/ temperature accordingly.

Auto shut-off for eye-wash at ~38C [100F] - no accidental eye-burning when trying to wash eyes!

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

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.

Wednesday, September 20, 2017, 08:00: 

-A new ion gauge was installed yesterday afternoon and the old one removed. The old IG was found to be contaminated (300 cpm) and as of 20/09/2017, it is double bagged and stashed underneath the evaporator for the time being. 

Completed under work permit: I2017-09-19-9

-The roughing pump was reconnected this morning without issue.

 Tuesday, November 07, 2017, 11:55

Interlocks limits updated/ changed to 100mTorr for both TGHT and TBHT by Ray

Friday, October 04, 2013, 15:37

A LP target container is coated with TaC.  The container is wrapped with 3 layers to heat shield.  

This container will be used for the graphite tube test.  

Chamber is being pumped down.

 The HS cooling water valves are open and no leaks are detected. 

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

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

The temperature will be monitored and measured. 

Wednesday, November 24, 2021, 10:38

A first, short "FullTa1" target was loaded into the evap1. It consists of a short container (10 cm) with lateral thickness of ~0.2mm. The ends of the target connect with the TGHT terminals through two copper adapters.

After pumpdown down to ~4E-5 T, the TGHT was ramped gradually to 200 A in the next ~5 mins, leaving the target at 200 A for about 10 mins. Then, the current was increased fastly to 450 A in about 30 seconds, and was left at 450 A for a minute. 

Note: the one minute at 450 A started when the TGHT voltage drop across stabilized, considered a sign of temperature homogeneity across the target container

Wednesday, November 24, 2021, 14:34

The second short container "FullTa2" target has been loaded and heated, following the same procedure as above. In this case, the initial pumpdown went to a lower pressure (1.5E-5 T instead of ~4E-5 T) resulting in lower pressure throughout the whole procedure

Thursday, March 31, 2021, 14:42

EVAP1's TGHT has been tripping even when the pressure is below the tripping limits. The temperature of the turbo pump and the TGHT's power supply were monitored discarding the possibility of tripping due to the overheating of these pieces of equipment.

Gelo has been monitoring the IGP1 during carbothermal reductions to pinpoint the tripping issue, below is Gelo description to the issue and the patch he implemented to fix it.

"IGP loses its STATON (On status) if the value from the device is not within the valid voltage window (0.7 to 10 V). IEVAP:IGP1 for some reason goes to 0V for a few seconds then goes back up to where it left off.

Prior to the latest software updated, I added a 2 second delay in the code so that any invalid signal <=2s will be ignored.

Here is the data that you sent me specifically looking at when it tripped. I also attached the data that you sent me.  << File: 310321-P2N-3-CR (1).txt >>

TGHT Voltage and TGHT current are both read from the same PLC module, which tells me that the PLC module is not likely the issue since we were still reading other signals when IGP was reading 0.

For the new update, I adjusted the delay to 5 seconds since the signal drop seemed like it was about 2s and was enough to lose the IGP STATON bit which tripped TGHT.

The delay only applies for the STATON status which can also be described as reading OK status in this case. Any other trip will be instantaneous and work as normal. 

STATON is “ANDed” with other trips. i.e. IEVAPIGP_LESS10MTORR = IEVAPIGP1_RDVAC < 10mTorr AND IEVAPIGP1_STATON."

 Replacement of electronic / controller head from INIFICON - BPG to Agilent - Model: FRG-730 due to EVAP 1 trips.

Monday, June 01, 2020, 09:37: Swap complete. 

 Replacement of electronic / controller head from INIFICON - BPG to Agilent - Model: FRG-730 due to EVAP 1 trips.

 INIFICON -  BPG - SN: 232

PN: 353-573

Tuesday, August 18, 2020, 10:38: Control head for IGP1 swapped with bagged one.

Had been roughing.

Tuesday, August 18, 2020, 12:37: Turbo pump on. 

Tuesday, August 18, 2020, 12:54: Vacuum @ 1.28e-05T & dropping. 

 Wednesday, March 27, 2019, 08:50

A graphite insert was set into a tantalum tube in the evaporator 2 for 3 days

The objective of the test was to determine the current and voltage required to reach 2000 C

Current 424.2 A, voltage 7.17 V, P = 3 kW 

details can be find here https://elog.triumf.ca/TIS/Evaporator_2/433

The test will continue for 2 weeks in the EVAP1.

 Good vacuum 5e-4 Torr

Bad vacuum 1.00e-4

Pressure IGP1 = 1.55e-6 Torr

The autoramp was set to 420 A, at 1 A/min,

Monday, April 01, 2019, 07:57

TGHT = 4.68 V, 424.32 A

IGP1 = 9.61e-7 Torr

Autoramop is set to -1 A/min to 0 A

Monday, April 01, 2019, 11:19 

IGP1=5.43e-7 Torr

At TGHT = 223 A and 2.1 V the autoramp was increased to -2 A/min

Monday, April 01, 2019, 11:20

Sudden and unexpected  pressure increment to 1.4e-5 Torr, might be a glitch.

Monday, April 01, 2019, 13:10

IGP1 = 4.34e-7Torr

The autoramp was stopped at TGHT = 17.28 A, 0.0625 V,

and it was lower down to 0 A manually

 Results: The tantalum tube deformed in the contact points with the graphite insert

 Friday, May 24, 2019, 15:04

A TaC coated tantalum tube, loaded with graphite foils was transferred to EVAP1

https://elog.triumf.ca/TIS/Evaporator_2/445

The tueb will be heated with the same power used in EVAP2,

the power of the EVAP2 and EVAP1 will be matched using the fit from Document-126503

The chamber is currently pumping down

 Monday, May 27, 2019, 08:58

The current will be tapped to 50 A to replicate the procedure of EVAP2 

then the current will be set to 1 A/min to 500 A and increased to match with EVAP2 power.

 Wednesday, April 10, 2019, 13:30

Tantalum foil caps were added to a graphite insert (see picture caps)

 The insert was set in a tantalum tube previously coated and wrapped with 3 Ta sheets.

The system was installed in the EVAP1, and it will be heated for a week at 2000 C.

Currently pumping down.

 Thursday, April 11, 2019, 13:26

IGP1 = 9.9e-7 Torr

The current is tapped to 40 A

After 1hr the autoramp is set to 1 A/min to TGHT 500 A

The TGHT current remained at 500 A for week

until at April 18 at ~4:30 pm

a localized power outage tripped the EVAP1.

The EVAP1 was ventd with air and the tantalum tube was removed

The tantalum tube did not break.

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.

 Tuesday, June 26, 2018, 09:30. Gloves on evap 1 changed out. 

The original right one was otrn. Left was o but worn. Both replaced with new gloves.

 Friday, November 05, 2021, 13:23

Full target loaded with ~500 non-active foils plus 4 active foils.  

Initial pressure when heating: 1.6E-5 T 

Manually went to:

TGHT=125 A 

TBHT=50 A

with increments of 5 A each. Pressure has little spikes but mostly unchanged (going down, actually).

Stayed at those values for 2 min 

Friday, November 05, 2021, 13:37 

Manually went to

TGHT=180 A 

TBHT=80 A

maximum pressure 6.6e-5 Torr

Friday, November 05, 2021, 13:43

IGP1 =  2.45e-5 Torr

We are aiming at going to TGHT=580 A and TBHT=230 A in increments of 50 A each and leave it there for a total of 5 minutes after nominal parameters are reached 

Friday, November 05, 2021, 13:55

IGP1 =  1.7e-5 Torr

Heating done, we stayed at 530A for a bit long (~15 sec) during the heating so the total heat time at 580A was interrupted at 4 mins 50 seconds instead of 5 mins. All good, max pressure during the heating was 0.013 T.

 Friday, September 24, 2021, 15:38

Full target loaded with ~500 non-active foils plus 4 active foils.  

Initial pressure when heating: 6.6E-5 T 

Manually went to:

TGHT=125 A 

TBHT=50 A

with increments of 5 A each. Pressure has little spikes but mostly unchanged (going down, actually).

Friday, September 24, 2021, 15:42

Manually went to

TGHT=180 A 

TBHT=80 A

Pressure going up steadily, max pressure <2E-4

Friday, September 24, 2021, 16:48

From TGHT=180 A, TBHT=80 A we are aiming at going to TGHT=580 A and TBHT=230 A in increments of 50 A each and leave it there for a total of 5 minutes after nominal parameters are reached. Initial pressure 1.3E-5 T.

Friday, September 24, 2021, 17:01

Fast rampup done, we were up there in 30 seconds.

TGHT VOL = 6.6 V

TBHT VOL = 3 V

Max pressure 2E-3 T. Both TGHT and TBHT were shut off abruptly on purpose.