Wires in TM#2 have been terminated at the top of the module.

The schedule has some changes due to  new TM2 source tray coil cooling line leaking at test stand. Now,It is re-scheduled in such an estimation  that TM2 source tray could be ready at teat stand by this Friday(May-15th). see attachment 1,2.

2015-05-12,  Changed  and updated the TH activity schedule according to Dons new beam schedule which is re-arranged after the coil line leaking issue. See attachments 3,4. No major conflicts has been found on the new schedule.

2015-05 25, Updated the TH activity schedule according to present TM2 job processing. See attachment 5,6.

TM2 has been successfully de-shuttered.

All went pretty much according to plan except I had to remove one fastener out of the upper wiring harness (the one that has just been installed) to allow for enough clearance to rotated the shutter guide out of the way...I shutter to think what would have happened otherwise...anyways...

Close inspection of the shutter does show that the "thin" area isn't in very good shape; whether this is a result of removal or just the way it was is hard.Due to the ease of removal I would quess that it may have been a preexisting condition. That being said...I think we may want to consider replacing it.

Hello,

For reference, I have attached a list of all solder joints in the TM2 Source Tray, and the alloys used for the most recent build (as per ITA6144).   I have also provided data sheets for the alloys, and PDF copies of all the drawings calling out the joints.

Certanium 34 C (222 deg C melt point) was used for all low-temperature solder applications, except for the steel inserts in the water blocks.  Previous revisions of the Source Tray drawings called out a higher-temperature McMaster lead-based solder (304 deg C melt point).  The change to Certanium 34 C on the prints was made in Bevan's era, during the transitional update of the source tray drawings between the TM1 and TM3 source tray projects, just before I took over updating the drawing packages.  I believe Bevan made this change on general advice from Guy Stanford, who stated that Certanium 34 C is a much easier solder to work with and makes a more mechanically reliable joint.  However, the change really should have had more review and validation testing before being implemented.

This said, we now have a source tray that uses Certanium 34 C, and rework of every joint would set us back too far in the schedule to meet the deadline, so we will have to run with it as it is.

Of particular concern are the joints on the target oven and coil heating blocks, which are now using a lower temperature solder (222 deg C melt vs 304 deg C melt).  We have experienced a coil block failure on TM4 due to a failed solder joint, although the failure mode is not known for certain.  We also had two recent failures on the test stand of a coil joint soldered with Certanium 34 C, but this was due to an error in the connection of cooling water to the joints (i.e. the joints had no coolant flow and the solder melted... this is expected!).

Anders and I have performed independent thermal analysis on the joints due to the radiative and electric heating from the target, and have concluded that even with a lower temperature solder, there is a lot of margin, so the risk seems to be low.  This work will be published in a separate report to be circulated later.

Thank you and regards,

Grant

The shutter in TM2 was successfully replaced today.

New lock washer and nut were installed onto shutter and nut torqued to 120 ft lbs.

Shutter guide alignment tool was used to insure tapped shutter guide holes were concentric with thru holes in shutter side mounting panel, button head screws replaced and torqued to 110 ft-lbs.

The shutter was manually cycled open and closed by David and everything is to operate well.

TM#2 with no source tray has been moved from the south hot cell to the conditioning station.

TM#2 with no source tray has been moved from the conditioning station to the north east silo.

Once the test stand was vented and all lines purged Anders Mjos and myself jigged up the water blocks and proceeded to remove the TM4 SiC#31 target used during the testing, Einso lens and steerer.  Once these components where removed we transferred the source tray to the transport plate and moved it to the alignment area.

Source tray for TM2 has been moved to the alignment area by Dan and co.

This morning Dan removed the c-seals used during the test and he and I inspected the sealing surfaces to determine if they need to be cleaned...they do..trace indium was present on all blocks.

Surfaces will be cleaned before final alignment check.

Final Alignment checks of the TM2 source tray took place today.

Mater Jig: Front - 0,0 Back - 0 left, right, .005 low

Tray: Front .001 High, .001 right Back - .001 right, .008 low

Which equals  Tray: front .001 high, .001 right back: .001 right, .003 low in comparison to the master jig which is both within spec and within reason to pre-soldering numbers.

Steerer was out significantly and currently sits at .003 high, .002 right wrt. master jig.

More refinement on the steerer tomorrow and check on the optics tray as well.

Final alignment continued this morning.

Steerers have been aligned to 0.001 low, 0.000 left/right wrt master jig.

Optics tray required some adjustment as well and is now at:

Front 0.000 left/right, .001 high wrt master jig

Back 0.001 high, 0.000 left/right wrt master jig

Febiad coil conductor blocks have been reset with the master target jig as well...as they have been on and off during the test stand test.

A few components have been removed during the test stand test (such as feet required for tranfser jig) which I will now hunt down.

Otherwise i believe we are ready.

Final inspection took place with Pierre, Grant, Friedhelm and Anders present.

Two action items were raised:

1) check routing of 9 pin connector line

2) Check orientation of 9 pin water block

Chad pointed out concerns on clearances between a target and conductor block waterlines, possible optics tray alignment issues (that it had changed slightly from the initial alignment), and gap between steerer housing and ground electrode due to alignment.

Don Jackson brought to my attention some potential HV minimum spark gap issues with the source tray cooling lines.  It appears:

- The gap between the Ground Electrode cooling lines (ground) and Heat Shield cooling lines (HV) does not meet the spec of 0.668" MIN called out on the print

- The gap between the Window cooling lines (ground) and the Mounting Support Plate cooling lines (HV) does not meet the spec of 0.668" MIN called out on the print.

A copy of the tube bending drawing is attached with the spec highlighted in green.

The 0.668" MIN gap spec came from a check I asked Mark Llagan to perform to find the minimum gap when he was preparing the model for the tube bending drawing.  This gap was approved Jan 28th, 2015 by Friedhelm Ames on ECO-3587.

The source tray with the tubes bent as it is currently has been tested to 55 kV at the test stand by Anders, see:
https://elog.triumf.ca/TIS/Test-Stand/447

I am away June 12th to June 24th on vacation inclusive.  Isaac Earle is in charge of Remote Handling in my absence.

I am delegating Don Jackson responsible for resolving this TM2 HV issue, collecting and documenting the approval to proceed from the T/IS group leader with the source tray as-is, or to try to re-work the cooling lines and delay the project.

The source tray is NOT to be installed in the Hot Cell until this issue has been resolved.

Regards,

Grant

-- 
Grant Minor, M.A.Sc., P.Eng.
TRIUMF Remote Handling Group Leader
Nuclear Engineer
4004 Wesbrook Mall, Vancouver
BC, Canada, V6T2A3
gminor@triumf.ca
(604) 222-7359(604) 222-7359
http://www.triumf.ca/profiles/4557

I've taken measurements between HV and ground circuit on TM2 source tray as instructed.

At their closest points:

Heat Sheild to Ground Electrode 0.445"

Ground Electrode to C1+ 0.281"

Window to Mounting Support Plate 0.858"

Maico, Chad and I conducted a leak check on all affected lines following tweaking of cooling line gaps. All lines pumped down to a level of 10^-9 torrliter/sec with no leaks detected with Helium.

After bending and leak checking the new measurements from ground to HV on the TM2 source tray are:

Ground to C1+ 0.6645"

ground to heat shield 0.506

Window to mounting support plate - unchanged - over 0.80"

TM#2 is now in the south hot cell.

As per scedule TM2 containment box has been removed.

Today cleaning and polishing pads were inserted into the hot cell.

Module side waterblock jig installation was attempted however one of the locking tabs/latches (ITA2405?) came undone/fell off. Luckily, I had old, obsolete jigs in the hot cell so I was able to remove parts I needed from an old one and rebuild the current one.

Jig was installed on module to retain module side waterblocks.

Blank-off remove was commenced, however due to and large amount of water coming out of the line to have the blank-off removed work had to stop till the water evaporates.

Waterblock sealing surface cleaning and polishing will continue tomorrow.

Also, upon installing the jig a piece of fiberglass that had previously been manual inserted between two of the water lines (early to mid 2000's) fell out.

Fiberglass that fell out yesterday was put back in place (as well as possible).

Cleaning took place this morning with excellent results. Cleaning was performed with red scotch brite on the cleaning tool, air pressure at 40 psi while running, with one 60 second cycle. Three blocks (EE, HS and Window) needed a second pass to remove the indium.

Polishing commenced with 2000 grit wet sand paper. Paper was wet with isopropynol. 60 second cycles for double seal blocks, 30 second for singles. The 2000 grit pass was completed.

Polishing will finish tomorrow morning as well as removal of optics tray from source tray in preparartion for insertion of the source tray into the module tomorrow afternoon or Friday morning.

First picture is Tube heater Circuit D block before cleaning and second picture is after cleaning.