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!

 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.

On Tuesday it was noted that evaporator 1 was not pumping down properly. It was vented and the seal & seal face wiped with a cloth. The initial pump down rate was faster, however after 48 hrs, it has still not pumped down to appropriate levels. 

Thursday, March 21, 2019, 08:59: IV1 closed & TP1 off. 

Oiled as per work permit:  I2019-03-26-2.

Tuesday, March 26, 2019, 08:53: Start RP1

Tuesday, March 26, 2019, 09:03: Holding at 0.303T on CG2. 

Tuesday, March 26, 2019, 09:10: Turned off RP1. Vent chamber slightly. Close VV1. Restarted RP1.

Open RV1.

Tuesday, March 26, 2019, 09:13: Vacuum stalls out at approx 0.300T.

Tuesday, March 26, 2019, 09:16: Shut off RP1. Contact Vacuum group.

 Checked as per work permit: I2019-03-26-5

Tuesday, March 26, 2019, 13:50: Filter checked. OK

Tuesday, March 26, 2019, 14:00: Tees checked. OK.

Tuesday, March 26, 2019, 14:05: Line / bellows. Fail

Tuesday, March 26, 2019, 14:11: New line / bellows. OK 

Tuesday, March 26, 2019, 14:19: TP1 on, IV1 opened. Vacuum @ 3.5e-05T and dropping.

Pumping down evap1. Dispose of the old line. Replacement successful. No contamination was found on the swipes.

Tuesday, March 26, 2019, 14:36: Vacuum @ 1.12e-05T and 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, April 05, 2019, 10:04

A tantalum tube was coated with TaC and wrapped with Ta heat-shield (3 layers)

Desired temp = 1900 C (expected TGHT ~445A/7.5V), TBHT will be set fixed at 230A (max).

Yesterday the tube was set in the EVAP1 and pumped down.

Friday, April 05, 2019, 10:07 

IGP1= 1.61e-6 Torr

The current is manually tapped to 40 A.

Friday, April 05, 2019, 13:25

After ~2 hours 

IGP1 = 1.54e-6 Torr

TGHT = 0.61 V, 40.39 A

Autoramp is set to 1 A/min to 400 A

Good vac at 3.00-5 Torr

Bad vac at 5.0e-5 Torr.

Sunday, April 07, 2019, 9:00

The current was increased to 424 A

Monday, April 08, 2019, 16:36

EVAP1 vented with air, sintered tube was removed. 

 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.

 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.

 One of the TBHT bolts  fell out of reach and may be sitting on the isolation valve or TP.

Remove TP as per WP:  I2019-11-05-9

Tuesday, November 05, 2019, 14:48: Completed. Found 2 TBHT bolts, a broken insulator, one small vented screw, and a piece of rubber.

Turbo pump mesh clear. Magnetic grabbing tool left in Evap 1 to potentially pickup /  grab materials before they fall down the hole if needed. The tip of the tool is contaminated.

Tuesday, November 05, 2019, 15:03: Evap 1 pumped down. TP1 started, IV1 opened. Ok. 

 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. 

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."