12, 24 and 60 month service completed. Bearings for drive motor wheels regreased and observed to move freely without load. Reducers repacked with Molub Alloy 777-1 ES. Vertical ball screw scissor mechanism inspected and all operations observed to be in sound mechanical condition.

Maintenance has been performed on the lift trolley, re sealed the main drive gear box it was quite dry inside and in need of new seals and lubrication. Inspected the vertical gear box and resealed it, re tensioned  the vertical drive chain after removing gear box and finding since last year the chain had become somewhat slack causing it to rub on the frame. Purchased a new LED light bar to replace the aging and failing flourescent light that was in place. greased all pillow block bearings and replaced old Zerk ( grease nipple) on some bearings to allow for easier lubrication.

Today (2024-02-16) when operating the lift trolley to install shields in the cyclotron, the vertical motion was observed to be intermittently working. When the trolley was out of the cyclotron tank and on the carrier, troubleshooting showed that it was likely an issue with the motor relays. The relay box was removed and the relays showed signs of wear due to ageing. The relays were replaced with new ones, and the box was reinstalled. The vertical motion appeared to work correctly after the replacement. The issue is considered resolved.

It is suggested that all motor relays be inspected or replaced as soon as possible, as others are of a similar age and could fail in the near future.

Edit (2024-02-26): last week, further issues were encountered. It was suspected that the upper limit switch was faulty. The limit switch was replaced and the issues did not persist. Note: it is possible that all observed issues could be related to the CAMAC power supply problem discussed in e-log 169

The two camera tilt mechanisms on the lift trolley have been upgraded. Upgrades include:

For the individual camera:

• Replaced cylinder
• Replaced fittings for cylinder
• Replaced air tubing from flow control to cylinder
• Visual inspection and fasteners tightened

For the overall platform containing the camera and lighting:

• Replaced cylinder
• Replaced fittings for cylinder
• Replaced valve (5/3 centre closed style)
• Replaced air regulator and set pressure (note: at the time of writing this e-log, it still needs to be fastened in place via its mounting bracket)
• Replaced air tubing
• Visual inspection and fasteners tightened

The mirror actuation mechanism was observed to be "sticky" during 2023 winter shutdown - it occasionally did not function properly and needed some manual assistance. 

The following items were addressed to resolve the issue: 

• Replacement of the Tyne Myte double acting valve which controls the cylinder (based on troubleshooting tests, it seemed this valve was not functional or intermittently functional)
• Addition of a silencer and in-line flow control on the exhaust of the aforementioned valve - adjusted to allow for smooth operation of the mirror when toggled
• Cleaning of the cylinder's shaft (it had a sticky residue build-up and was notably high friction) - this cylinder should likely be replaced in the near future 
• Replacement of air tubing along the supply line to the valve, and between the valve and cylinder
• Replacement of all fittings (push-connect style) on the valve and cylinders

The mirror actuation was tested after these changes and is behaving normally.

No further repairs required, although it is suggested to change the remainder of the tubing and fittings for the other valves which control different functions on this trolley, and to eventually upgrade the valves themselves to a low profile valve bank. 

We had just finished pulling out the ladders from the cyclotron with the lift trolley. We started to run the lift trolley into the cyclotron when it stopped moving. The radial drive gearbox was the problem. We pulled the gearbox off. Replaced  the key and the lift trolley is all repaired.

2018-01-09
07:00-10:00 - Pre-job meeting, informed main control room of operation startup, lowered inflector (Operations 
Group)
10:00-12:00 - Connected cable chain rail, installed service bridge into tank, ran video trolley onto service 
bridge, performed initial circumnavigation of service bridge in tank, made contact with newly installed cable 
bracket (Probes Group) near jack station #9, assessed damage to cable and bracket (service bridge OK) 
12:00-13:00 - Performed photo survey of HE1 probe / 2A extraction foil / 1A extraction foil w/ Probes Group 
representative
13:00-14:30 - Performed photo survey of center post / lower and upper D-gaps / lower outer perimeter
14:30-15:00 - Powered down service bridge control room, informed main control room of job progress

2018-01-10
07:00-07:30 - Pre-job meeting, powered up SBCR, informed MCR, troubleshot video trolley
07:30-09:00 - Performed video survey of two cryovac modules / upper and lower RF booster / 2A exit port / 2x 
lower and upper scraper foils
09:00-10:00 - Removed video trolley and installed lift trolley onto carrier
10:00-12:00 - Removed 7x copper blockers from tank and placed into 4x coffins
12:00-12:45 - Removed lift hook extension and installed radiation meter onto lift trolley
12:45-13:45 - Calibrated radiation meter
13:45-15:00 - Post-job meeting and preparation for in-tank radiation survey, informed MCR

2018-01-11
07:00-07:30 - Pre-job meeting, powered up SBCR, informed MCR
07:30-08:00 - Calibrated radiation meter w/ Safety Group representative
08:00-10:30 - Performed in-tank radiation survey w/o lead shields (27 circumnavigation passes inside tank 
from 350" to 80" radial position)
10:30-11:00 - Removed radiation meter from lift trolley
11:00-14:30 - Installed 200 & 400 series lead shields
14:30-15:00 - Powered down SBCR, informed MCR

2018-01-12
07:00-07:30 - Pre-job meeting, powered up SBCR, informed MCR
07:30-09:30 - Installed 600 & 500 series lead shields
09:30-14:30 - Installed 700 series lead shields
14:30-15:00 - Powered down SBCR, informed MCR

2018-01-15
07:00-15:30 - Pre-job meeting, powered up SBCR, informed MCR, installed 700 series shields, installed ladders,
installed port hole covers, powered down SBCR, informed MCR

2018-01-16
07:00-15:30 - Pre-job meeting, powered up SBCR, informed MCR, calibrated radiation meter w/ Safety Group
representative, powered down SBCR, informed MCR

2018-01-17
07:00-15:30 - Prepared for upper resonator 2C Extraction Probe

Lid-up was first attempted yesterday (Jan 28th) by Dan Louie, Arthur Leung, and Maico Dalla Valle.  They experienced problems with Station 9 continually tripping the system and were not successful.

This morning again there were problems raising the lid above ~1 inch due to tripping at station 9.  It was observed that the mechanical counter at Station 9 was increasing about 5 to 6 times faster than the counters at the other stations.  There may be a mechanical problem with the gear reduction for this counter.  However, the mechanical counter is just a readout and does not control any aspect of the lid up.   Comparisons between stations 9 and 10 at the 1 inch trip point are shown below.  Station 10 is representative of the other stations within about 100 counts. 

The lid was lowered fully and the gap between the yoke and the upper structure primary beams was measured by Maico at one spot per station with 1/4" stock and feeler gauges (see attached reference photo from 2012).

Not much could be concluded from the measurements.  The control system is supposed to keep the jacks parallel within about 50 thou, however Stations 1 and 11 appeared to be out by 180 thou.  It is difficult to say without further study whether this larger discrepancy is due to overshoot at each station after the lower limit switches are reached.

Grant Minor, Dan, Maico, and Arthur met in the Main Control Room at around 1:30pm to assess.  Dan commented that Station 9 was continually lagging in the system and causing the ~1 inch trip.   The decision was made to drive the whole system to the ~1inch trip point and then jog Station 9 manually to bring it back into the "go" band of tolerance, and continue on this way until the "sticky" portion of travel was overcome.  In Grant's opinion, the transmission system at each station (motor, reducers, jacks, and upper bearing) sits dormant in one position for a full year each year and settles in a single position.  Some asymmetry in the static and dynamic friction from station to station is expected after such a long idle period.  Additionally, the lubrication at station 9 has not been serviced since 1996 (18 years).  Grant also felt that jogging the system in small increments to bring it back into the tolerance band should not damage the jacks, motors, or reducers provided they were carefully monitored for abnormal noises or overheating.

The sequence of events following the 1:30pm meeting is outlined below:

- The system tripped as expected around 1 inch.

- Station 9 was jogged upwards 20 thou, measured with the dial indicator.  Station 9 counter increased from 9255 to 9429.

- The entire system was run upwards by about another inch with several more trips, some from Station 9 and some from other stations.  Dan reset the system after each trip.

- At around 2 inches, Station 9 was jogged again.  Maico reset the dial indicator and attempted to jog manually but the dial did not move.  This might have been due to the lag at Station 9 creating some amount of backlash before the load was taken again.  He reset the dial again and this time measured a jog of 25 thou.  Dan asked us to back off by 20 thou, then he reset the system and we continued to raise.

- The system was raised to about 3" in small increments with several more trips, each time reset by Dan.  Station 9 was jogged 3 more times during this period by 10 thou each time, at approx. counter readings 16 362, 16 802, and 17 134.

- The system then ran properly for quite some time and tripped at around 6 inches.  We stopped to inspect the tank seal, which was OK.

- The system was reset by Dan and run again to about 10 inches, at which point station 1 tripped.  Station 9 counter read 60 775, Station 11 counter read 10 829 (again a factor of 6 discrepancy).

- Dan requested a jog of 10 thou at Station 1, and then we continued to run.  The system ran with only a couple of trips up to about 1 foot from the upper limit.

- At around 1 foot from the upper limit, Station 7 started to cause tripping.  It was jogged 10 thou and we continued all the way to the upper limit.

(Total travel is approximately 48 inches or 4 feet).

During the course of the work, it was observed that the motor at station 9 was getting hot early (around 2 to 3 inches of travel), but the motors at other stations (e.g. Station 11, Station 1) reached about the same temperature to touch after the system was running properly.

Report by Grant Minor, P.Eng.

Attached is a scan of a handwritten record from 1994 showing yoke-to-upper-structure gap measurements from 1994, both L and R sides, with tank under vacuum and vented.

The measurements appear to be made with a 0.25" shim and 0.01" pieces of shim stock as they are only in increments of 10 thou.

The 1994 gap appears to vary from 0.25" to 0.33" (80 thou max variation) under vacuum, and from 0.29" to 0.33" vented (40 thou max variation).

Our 2013 measurements, made with a 0.25" piece of stock and a feeler gauge, varied from 0.265" at Station 1 to 0.445" at Station 11, (180 thou max variation, see Jan 28 e-log).

I have not yet found any other records of this measurement but I will keep searching.  The gaps may have varied by as much as 180 thou for many years.

I recommend checking the clearance at all stations and jogging individual stations such that the gaps are within a 40 thou band prior to the next lift.

Lid-up started approximately 10am Monday 26 Jan 2015.

The first attempt to raise the lid was halted at a mechanical counter reading of approximately 1050 because a large discrepancy was observed in the mechanical counter reading at Station 11.  One jog at station 9 was employed leading up to the halt:

Station 9 Jog:

8              732

9              652/735               

10           739

Halt:

1              1048

2              1052

3              1025

4              1053

5              1026

6              1055

7              1038

8              1042

9              987

10           1051

11           2968

12           1052

All jacks were lowered back to the starting position, and the mechanical counter was replaced at station 11.  The new counter was set to the balance between adjacent stations 10 and 12.

All stations were jogged manually to index the yoke gap at ¼” with shims and the counters were recorded.  It was discovered that station 11 was out by about 30 counts.   Dan Louie wanted to check the discrepancy with the control system so we lowered manually back to start position “A”. 

After Dan’s OK we jogged manually up again to ¼” yoke gap and noticed the same ~30 count discrepancy with station 11.  It was determined that both the counter and the syncro at station 11 were out by about 30 counts with respect to the master.   Maico and Dan de-coupled the syncro and counter box from the output shaft of the jack, and adjusted both the syncro and the counter together until the count on the counter and the control system was adjusted about 30 counts back into the range of the other jacks.

New start “A”:                   ¼” shim - #1       ¼” shim #2

1              44                           115                         116

2              58                           145                         143        

3              44                           137                         133

4              55                           146                         144

5              46                           133                         133

6              47                           127                         124

7              47                           129                         125

8              49                           105                         110

9              62                           129                         126

10           54                           124                         124

11           55*                         162                         157 to 130**

12           55                           116                         114

* 55 set value after counter replacement

** both syncro and mech counter decoupled from jack worm gear shaft and adjusted to 130

The lid-up procedure then started again.  Two jogs of station 9 were required as recorded below, then the system travel from that point forward was smooth.

Station                  Value    Jog #1                   Value    Jog #2

8                              1439                                       3499

9                              1426       1446                       3476       3506

10                           1448                                       3506

The lid up sequence was stopped at 3pm half way through at around 19,000 counts because it was noticed that the new fall protection platform at station 8 would potentially interfere with an overhang in the ceiling for the vault lights. This interference occurs only at that particular station, and the station directly opposite 8.

The interference was measured by Dan McDonald and confirmed (see attached photos).

The platform was removed and lid-up started again at 4pm and was completed by about 4:23 pm.

Final Counts:

1              47393

2              47404

3              47391

4              47404

5              47403

6              47387

7              47401

8              47379

9              47397

10           47403

11           47397

12           47401

Lid down started around 2:30 pm today (March 6th, 2015)

Master Start: 47422

Mechanical Counter Readings:

The operation was mostly smooth and no station jogs were required.

At around 4800 counts, a stainless braid hose between stations 2 and 3 knocked into an electrical box (perhaps a new box?) and knocked the cover off, which made a loud clang (photo attached).  The lid down was stopped until the source of the clang was identified.

Lid up recap for  March 26th 2015.

Start time 14:50        Master- 33                               Finish 15:25        Master -47413             Zero jogs to system.

• 1- 36                                                                47386                                                          
• 2-38                                                                 47378
• 3-33                                                                 47374                                                       
• 4-36                                                                 47382
• 5-36                                                                 47394
• 6-36                                                                 47385
• 7-37                                                                 47398
• 8-33                                                                 47373
• 9-38                                                                 47395
• 10-38                                                               47395
• 11-38                                                               47395
• 12-36                                                               47393

Lid up operations took place on January 21st starting at 10:25 lid went up without issue. Couple things to note are station 11 had a number of spikes in the first ten inches of travel and number five had a couple in the first five inches of travel. We will monitor these stations and perform maintenance as needed. Station three which has spares #13 saw above normal heat generation in the right side High field gear box, we will investigate next week.

The cyclotron lid was raised starting ~10:30am on 2024-02-06 and finishing at ~3:30pm on 2024-02-08, under work permit C2024-02-06-4.

Upon first attempt to raise the lid, issues were encountered. The system seemed to start as expected but quickly tripped, resulting in no appreciable travel. Upon investigation, it was determined that this was due to a blown fuse which feeds the brakes master relay (see e-log  https://elog.triumf.ca/TIS/RH-Cyclotron/165). The result of this was the the brakes were not properly disengaging, leading to additional friction in the system, and preventing regular motion.

After rectifying this issue, a second attempt was made to raise the lid. This time, issues were encountered with some of the stations being out-of-sync with respect to the others (a result of the troubleshooting which took place for the aforementioned issue). After manually jogging some stations, it was decided to lower the lid all the way, jog motors for individual stations so that they physically match each other in terms of travel distance at a known starting point, manually adjust counters on some stations whose counter values were significantly off so that they matched neighbours, and then jog individual stations such that each synchro measurement was close enough to begin lid up operation.

After this work took place, another attempt to raise the lid was made. This time, the lid traveled fairly smoothly, with a few occasional stops. It seemed that some motors were lagging behind others a bit - namely stations 5, 11, and 12. After raising the lid approximately 4-6", it was decided that the best course of action would be to fully lower it and start again, now that the system had some time to "warm up".

The lid was lowered to the bottom limit again, and then raised. The master synchro count was 0 to start. This time, lid travel was the most smooth, and stops near the start of travel were infrequent. The occasional stop occurred but the system could easily be started again. Jogging individual stations was rarely required. Most stops were due to noise observed on the synchro at station 5 (false trips).
When the lid was approximately halfway up, another unexpected issue occurred: station 10 completely stopped, which caused the entire system to stop. Station 10 could not be jogged in either direction in local mode. After some troubleshooting, it was determined that the motor contactor was causing issues - eventually it was rectified (see e-log https://elog.triumf.ca/TIS/RH-Cyclotron/166).

The lid continued to raise smoothly for the remainder of the travel with very few or no stoppages. It raised all the way, as confirmed by the gap measurement.

Final master synchro count when lid was fully up: 47401

 

See attached inspection checklist which contains information about each jack station during lid up operation, as well as pre-job inspection data.

Recommended actions:
- Replace synchro for station 5 next shutdown
- Inspect all 12 motor contactors prior to next lid down
- Order spare motor contactor
- Install replacement fuse (on order)

The lid up operation took place on Jan. 30, 2023.

The system was not energized well ahead of time to allow to "warm up", as is usually done.

Starting Master Synchro value: 62

The Master Synchro was jogged to a value around 2 prior to starting, to allow it to lag behind the jacks.

When first starting: after a few attempts to raise, it was determined that the master synchro value needed to lag behind the other synchros more than initial suspected. This was changed, and the system operated smoothly for a short time.

During lid travel, station 5 and station 11 both caused trips and needed to be manually jogged to match the rest of the stations. The system was restarted, and more trips occurred. Stations 7 and 10 were adjusted as well. Eventually, after adjusting a few stations, the lid travel smoothed out and no more issues were observed for the remainder of the operation.

The system was stopped at approx. 3 inches of travel (synchro count 5255) to inspect the seal, etc. Everything OK.

No major issues with any jacks. No overheating observed.

Jack 11 showed occasional noise spikes on readback (this happened in 2021 and 2022 as well - suggest replacing this station's synchro next).

When finished, the limit switches toggled as expected, and the gap was measured at 46.5" (correct value).

Ending Master Synchro value: 47388

The attached spreadsheets show all synchro values before and after the operation, as well as jack station infrared heat measurements.

Start time: 9:23 am
End time: 10:53 am (includes gap measurement, etc. - actual lid travel finish was a bit earlier)
Total time to raise was approx. 1.5 hr.

Doses:
Adam Newsome: 0.005 mSv
Maico Dalla Valle: 0.121 mSv
Eric Lahe: 0.056 mSv
Ryan Anderson: 0.017mSv
Kevin Lucow: 0.060 mSv
Ed Parton: 0.007 mSv
Jason Zhang: 0.025 mSv
Nadia Jorgenson: 0.005 mSv
Arthur Leung: 0 mSv
Dan Louie: N/A

[edited 2023-09-8 to fix typo - Adam Newsome]

The lid up operation took place on Feb. 4, 2022.

The system was not energized well ahead of time to allow to "warm up", as is usually done. Upon starting, brakes were not energized - this was because of the master synchro position - once it was adjusted, interlocks for motor brakes toggled as expected.

Starting Master Synchro value: 61

Minor issue when first starting: after a few attempts to raise, jack 12 needed to be manually jogged to adjust its synchronicity with the others. After it was adjusted, the entire operation went smoothly and the system did not automatically stop again.

The system was stopped at approx. 3 inches of travel to inspect the seal, etc. Everything OK.

No major issues with any jacks. No overheating observed.

Jack 11 showed occasional noise spikes on readback (this happened in 2021 as well - suggest replacing this station's synchro next).

Meter stick hit the ceiling and bent slightly. The meter stick versus limit switch discrepancy could be due to the stick shifting slightly by accident (due to vibrations or accidentally being bumped by someone). The limit switches were trusted as it would be highly unlikely for them to both disagree with the meter stick simultaneously if there was an adjustment setting issue with them.The limit switches toggled as expected, and the gap was measured at 46.5" (correct value).

Ending Master Synchro value: 47387

Total time to raise was approx. 40 minutes.

Doses:
Arthur: #150, 0
Dan L: #310, 0.02
Dan M: #819, 0.04
Nadia: #868, 0.02
Adam: #862, 0.014
Kyle: #111, 0.09
Ryan: #115, 0.05
Chris: #840, 0.043

The lid up operation took place on Jan. 22, 2021.

The system was not energized well ahead of time to allow to "warm up", as is usually done.

Starting Master Synchro value: 44

After gap set on all jacks, master synchro: 131

Notes on Jacks: Watch Jack 11, cause a few trips during lid down but was able to run again without jogging synchros

Jack 5 and 11 had spikes early but no trips

Jack 2 and 3 lagged early and caused trips (but no spikes)

After jogged 2 and 3 back, still had issues with 7,9,11

7, 9, 11 were jogged to match and then ran for half an inch, then 1, 5, 11 showed some spread

Lowered all the way down and spread was much improved (starting Master Synchro reading: 3)

Started raising again and went much smoother

Jacks 7 and 11 showed some occasional noise on readback

stopped to inspect vacuum seal (12:30 - Master Synchro 7016)

No trips on second attempt going up until 40"

Jack 1 kept falling behind, causing Jack 2 to trip

Finished at 2:03PM, Master Synchro at 47406

Meter stick did not reach ceiling (off by 1/4")

The meter stick versus limit switch discrepancy could be due to the stick shifting slightly by accident (due to vibrations or accidentally being bumped by someone). The limit switches were trusted as it would be highly unlikely for them to both disagree with the meter stick simultaneously if there was an adjustment setting issue with them.

The cyclotron lid was raised starting ~11:45am on 2024-05-02 and finishing at ~12:12pm under work permit C2024-05-02-5.

The raising was stopped a few times up until approximately 5" elevation, for RF group to perform checks, and to inspect the tank seal.

The tank seal was stuck to the lid near jack station 2.

The lid raised smoothly with no stoppages due to out-of-sync stations. No stations needed to be jogged.

Starting master synchro count was 66, but was jogged to 2 prior to starting. The final master synchro count when the lid was fully raised was 47387.

Note: the measuring stick which is affixed to the top of the lid and used to indicate full elevation was bent and should be "re-calibrated".

Summary attached.

Due to an issue with resonator latching, there was a need to raise the cyclotron lid a second time this shutdown.

The plan at first was to raise the lid by small increments (approximately 1mm at a time up to approximately 25mm) while RF group performed some checks.

After the RF groups completed their checks, it was determined that the lid needed to be raised the full extent.

The starting master synchro count originally was 52, and it was 2480 at the time when the decision was made to fully raise the lid.

The lid raised entirely with zero stoppages or observed issues. No abnormalities observed with any jack station.

The lid was fully raised by 1:49pm with a master synchro count of 47383.

See attached summary.

Lid up (Attempt #1)

Pre-indexed 

Start @ 2017-01-25 13:05
End   @ 2017-01-25

Master   56

Jack #01 00117 to ABORTED OPERATION
Jack #02 00123 to ABORTED OPERATION
Jack #03 00119 to ABORTED OPERATION
Jack #04 00114 to ABORTED OPERATION
Jack #05 00118 to ABORTED OPERATION
Jack #06 00121 to ABORTED OPERATION
Jack #07 00118 to ABORTED OPERATION
Jack #08 00118 to ABORTED OPERATION
Jack #09 00115 to ABORTED OPERATION
Jack #10 00120 to ABORTED OPERATION
Jack #11 00117 to ABORTED OPERATION
Jack #12 00110 to ABORTED OPERATION


Lid up (Attempt #3)

Start @ 2017-01-26 14:51
End   @ 2017-01-26 15:15

Master   -18 to 47365

Jack #01 00049 to 47335
Jack #02 00049 to 47332
Jack #03 00045 to 47337/41
Jack #04 00047 to 47334
Jack #05 00049 to 47341
Jack #06 00049 to 47343
Jack #07 00050 to 47348
Jack #08 00046 to 47324
Jack #09 00049 to 47348
Jack #10 00050 to 47346
Jack #11 00052 to 47334/6
Jack #12 00051 to 47341

Metre stick: 2 mm from vault ceiling
The Highfield input shaft on 10L was louder than the other stations while raising the lid.


Lid down

Start @ 2017-03-09 14:44
End   @ 2017-03-09 15:25
Master   47365 to 00040
Jack #01 47335 to 00045
Jack #02 47332 to 00043
Jack #03 47337 to 00042
Jack #04 47334 to 00044
Jack #05 47341 to 00044
Jack #06 47343 to 00044
Jack #07 47348 to 00045
Jack #08 47324 to 00043
Jack #09 47348 to 00044
Jack #10 47346 to 00046
Jack #11 47334 to 00048
Jack #12 47341 to 00045