The Inlet (T1), Outlet (T2), Col.A (T6), and Col. B (T7) thermistors at the T2 cooling package all gave intermittent faulty readings at various times between Oct - Dec 2014.  It is suspected that this was caused by a water leak in the area causing the terminals to get wet.  Inspection of the sensors revealed that they are in poor shape and that the readouts sometimes fluctuate when the probe or connectors are handled.  All four thermistor probes have been replaced.  The plastic interior of the Lemo connectors were found to be crumbling, and were replaced with crimp connections.  All T2 thermistors now appear to be functioning normally.  The T2 cooling package was started (with a bypass instead of the target assembly).  Flow through Collimators A and B has also been started.  The T2 package was inspected while running and no leaks were found.

Cyclotron Fault #7722 has been returned.

The "POT/CAM" MS connector on the T2-MK2 has been wired to allow automatic target version number identification by the new T1/T2 control system.  Pin A was jumpered to Pin C.  (MK1 targets will use Pin A to Pin B jumper).

The nylon cable ties on the target assembly were found to be very brittle and fragile, they have been replaced with PEEK cable ties.

The T2-MK2 target is now ready to be moved to the beamline.

 The T2-MK2 target was moved from the hot cell to the beam line. The T2 Protect Monitor was moved from the beam line to the hot cell.  The T2-MK2 assembly measured 136mSv/hr at 0.5m, and the protect monitor was 8mSv/hr.  Total dose incurred by Isaac Earle:  0.18mSv.  No dose to other workers

 The T1-MK2 target was transported from the storage pit to the beamline.  The target measured approximately 10mSv/hr at 0.5m.  All target services were hooked up and the cooling package was started (no change in T1 vacuum).

 The lower air amplifier has been started, and air supplied to the T1 and T2 areas by opening the appropriate ball valves beneath the amplifier.  The amplifier is cycling normally and the barrels are cool to the touch (indicating no significant air leaks).

Actuation of both profile monitors was checked from the control room.  Both reach the in and out limits as expected, with no change in vacuum level in the respective volumes.

 Four water sensors have been installed on top of the T1 monolith.  These water sensors were wired and brought to the area during the 2014 shutdown, but installation was delayed so that the top of the monolith could be painted first.  The sensor labels (attached to the sensor cable) are: T1, T2, T6, and T8.  The location of each sensor is documented on the diagram below.  Two photos of the top of the monolith are also attached.  Doug Preddy has been notified.

Both cooling packages are running steadily with the targets in Position 0.  

The demin flow (Q2) for both was tuned to approximately 1.5USgpm.  

A defeat was applied to T2Q1 flow to prevent high level nuisance trips.  This will remain in effect for the 2015 running period.

T2P1 Sensor (water inlet pressure) has a noisy signal.  This was not improved by replacing the sensor.  It is not expected to cause issues during operation and will be addressed (if still present) after the 2016 upgrade to PLC/EPICS control.

The expansion tank for both packages was topped up to approximately 1/4" above the top nut of the warning level sensor.

 The T1-MK2 target was wired for automatic target version detection by the new PLC control system (A to C jumper  in POT/CAM MS connector).  T1-MK1 and T2-MK1 targets still need to be wired which can take place after the shutdown without moving them from the storage pit.

- T2 Protect Monitor moved from the beam line to the hot cell on Monday April 20th
- Elevation of the plate center measured at 1839.0mm from the base of the vacuum flange
- Old monitor cassette photographed (attached).  Heat mark noticed on exit side approximately 10mm above and 5mm south of plate centers (cause unknown, and no matching mark on entrance side)
- Old monitor cassette removed, new one installed.  New elevation 1836.1mm (2.9mm upward shift - 3.0mm was requested)
- Electrical check performed by Probes Group on April 22 - They reported that it looks normal
- T2 Protect Monitor returned to the beamline April 22 in the evening.  Cables plugged in and flange bolts installed
- Vacuum pumped down normally on April 23 in the morning
- Probes group repeated the electrical check after installation from the 1A mezzanine - They reported that it looks normal
- The old monitor cassette will be left in the hot cell for possible future use

An electrical check has been completed for the T1 & T2 Profile and Protect Monitors by Dave Cameron and Mike Russell.  They report that all results look normal.

T2-MK2 target information sheet, beam spot measurements, and elevations were updated and delivered to Operations. PDF copy attached.

No work was done to T1-MK2 (placed in storage pit for 2015 shutdown duration to lower fields), so the sheets will not be updated.

 The T1-MK1 and T2-MK1 targets have been re-wired to allow version identification.  Work was performed in the target storage pit.  Approximate field around the targets in the pit was 100microSv/hr.  Disposable coveralls were worn for the job and had 800cpm of contamination on completion.  All nylon cable ties on the targets were replaced with PEEK cable ties.  Total dose received was 0.06mSv by Isaac Earle.  This modification has now been completed for all T1 and T2 target assemblies.

The Meson Hall RH Lab Warm Cell was used by Beamlines Group for hydrostatic testing of the TNF heat exchanger.  The location was chosen because of access to a water supply, active drain, and the heat exchanger has removable contamination.  The work took place on April 30th and May 1, 2015.  New plastic sheet was placed over the 6 foot block in the center of the warm cell which was used as a work area.  The plastic was removed after completion of the job.  The floor around the block was swiped and 100cpm contamination was found.

See attached photos.

Replacement of the BL1A blocks was completed yesterday (May 8, 2015) in preparation for first beam down 1A on May 12th.  The attached PDF shows a photograph of the current arrangement, and also the block arrangement at the beginning of the 2014 running period for comparison.

At 9:15am this morning BL1A tripped off due to loss of the watchdog signals for the T1/T2 control system.  Graham Waters investigated and the problem was found to be a corrupted initialization file.  The error was corrected, and BL1A was started by 11:30am.
 

The new T1/T2 level sensors (Omega LVCN414) were tested in the RH HC lab today using the Omega software on a laptop and positioning the level sensor flange above a bucket of water with similar height as the expansion tank.
The level sensors behaved as expected with varying water level.

The level sensor was configured with the following parameters:

- Loop Fail-Safe: Empty
- Output at Empty: 4mA at Bottom
- Start-up condition: Empty
- Sensor Height: 50.1cm (Based on TBP1682)
- Fill Height: 45.0cm (Based on TBP1682)

This results in 4mA output at 0cm tank height, and 20mA output at 45.0cm tank height.

This test will be repeated next week with the sensor wired directly to the PLC.

The new T1/T2 level sensors (Omega LVCN414) were hooked up to the PLC and the test performed on June 11 was repeated.

The water level above the base of the bucket was measured using a tape measure, as well as with the level sensor at various intervals as the bucket was filled and then drained:

Tape Measure Level (cm) --- Reading from Ultrasonic Level Sensor (cm)

Empty --- 0
3.3 --- 3.3
6.7 --- 6.7
12.2 --- 12.2
20.5 --- 20.3
29.2 --- 28.5
36.6 --- 36.3  (Last measurement on June 17, left overnight, see graph below)
36.6 --- 35.6 (First measurement on June 18)
31.3 --- 30.2
22.0 --- 21.9
13.1 --- 12.3
7.3 --- 6.5
Empty --- 0

Data was recorded while the sensor was left overnight (see attached plot).  After approximately 2 hours, the sensor stabilized and then fluctuated less than 0.1cm for the next 12 hours.  Overall these tests proved that this sensor will be suitable for the intended application and the parameters used for configuration are appropriate.

 The water in the BL1A holding tank was released to the city sewer.  This water was sampled, tested, and approved for release by RPG two weeks ago.  The total volume was 510L, a combination of water from the T2 and TNF systems.  The total time required to pump out the water with all valves fully open was 1hr2m.  Paperwork for the water release was completed and returned to RPG.

 A 5lb roll of 347SS sheet was received today.  This alloy is to be used for the target windows of the new T1 and T2 beryllium target cassettes that will be manufactured in the near future.  The material was ordered from Alloys International (PO# TR206407).  A mill spec report was included with the material, a scanned copy is attached in PDF format.  The roll will be stored in the meson hall RH hot cell lab office on the shelving above the work bench.

An order for new T1 and T2  beryllium targets was submitted to the TRIUMF machine shop today.  A total of seven T2 targets and twleve T1 targets were ordered to match existing stock of wire EDM target shells.  All required materials were supplied.  Completion by October 30, 2015 was requested.
 

A complete set of new drawings for both targets were released in June 2015 (TBP1683 for 12mm T1 Be target; TBP1691 for 10cm T2 Be target)

Current target stock for T1 (12mm Be) includes: 1 target on the shelf, 1 target on the MK1 target assembly (position 4, has not seen beam), 1 target on the MK2 target assembly (position 4, currently in use).

Current target stock for T2 (10cm Be) includes: 1 target on the shelf, 2 targets on the MK1 target assembly (position 3, has seen beam;  position 2 has not seen beam), 1 target on the MK2 target assembly (position 4, currently in use).