September 18th

The wiring harness was completed by Maico and Travis today (see pics) and was installed into the target module. During installation the bracket went on with ease. The junction box appeared to be hung up on something but did engage eventually. The plug for the collimator is not quite long enough for the manipulators to install completely. I was only able to get it to just engage by sneaking the manipulator in from the shutter side and then pushing on it with a long rod. The wiring for the collimator is several inches too long but does not interfere with anything. The remote installation of the wiring to the IMG gauge was easy but there at least 1 foot of extra wire and with the thicker gauge it has a mind of its own. I was eventually able to wrap the wire under the table before so it will not interfere with anything. The module side junction box bracket was not clamped to the table I was able to do up one bolt but other one was blocked by the new steerer strain relief. There is no requirement for both to be done up.

September 19th

Travis completed and electrical test this morning and it was found that coil 1 touches coil 2 touch each other very slightly. By inserting a piece of cardboard between the closest water block and the lines we no longer in contact and passed the test. Once the cardboard was removed the lines remained separated but if touched slightly they would spring back into place and make contact. There was some debate as to if we should make a custom part to separate the line or if we should attempt to tweak the lines. I decided that it is known that a very small change in the position of the module will cause separation between the lines, that we should attempt to tweak the lines. I braced the lines with one manipulator to prevent loading the ceramic while Maico "tweaked" the line. The line was successfully moved to cause separation. Maico and I then completed a visual inspection of the remaining water blocks and noticed that the ground electrode cooling lines are estimated 1/8" away from one of the module side coil lines. All other places that can easily be inspected appear to have enough clearance.

Travis and Don then completed an electrical check again (https://elog.triumf.ca/TIS/RH-ISAC/457). This module still failed the test but as noted not due to continuity rather lower than infinite resistance from the coil to coil and positive coil to 60kV common. This indicates that there is dirty or failing insulation that is either from the fiber glass wrap or something within the service tray. From inspection from outside the hot cell the best guess as to where this is happening is just before to after the exit of the water lines from the service tray but there is no way to confirm this.

Although the module may be able to run for a period of time with these resistances the insulation may continue to break down and there is the risk that during a module move the lines may shift and touch again. This combined with the known HV issues of TM3 paints a dark picture of the service tray.

Friedhelm and Lia have been advised of these recent results and have decided to continue with the installation of the target and conditioning of the target. Should the module be able to operate and extract beam it will be installed in ITE. Friedhelm also came for a visual inspection of the module and agreed that the issue is on the module side and that the lines are too close to tell exactly where the issue may lie. The possibility of separating the the blocks with further insulation was discussed but there is limited area that this can be completed remotely. In addition to this there is no indication that further insulation/bracing will improve the problem and there is considerable risk that it could make the issue worse.

Installation of the containment box started this afternoon and is completed other than the tightening of the window VCR joints.