The new gas bottle storage rack has been installed by/for the south hot cell.

See attached report.

Summary:

Radio problems just before entry to cell. Inspection afterwards revealed batteries charge but battery in one radio shorts out after a couple loads/cycles.

Fields in hot cell range from 630 uSv/h @ 1 m to 1.5mSv/h @ 1m. Contributing to the fields is the febiad coil line removed from TM4 in the south west corner of the hot cell.

Contamination/particulate on table as mostly black colored and of a fairly substantial size, but seamingly easy to collect. Distinquishable pieces of target material present.

Hot cell window show no sign of leaking on the inside of cell.

Pre-filter changed.

Manipulators lubricated.

Hot cell entry procedures appear to still be fairly successful in minimizing contamination migration from the hot cell.

Box for dissecting targets almost complete. Should be done tomorrow.

3 swipes of the south hot cell table were taken from the target hall through the roof hatch (2 standard, 1 alpha).

Initial results of the table swipes are pending however swipes of the pool tool and end effector are clean, 0 counts, booties, gloves clean.

Fall arrest equipment has a puzzling 6000 counts, and suit 500 counts.

ThO#1 has been removed from TM1 and placed into the plastic dissection box.

Containment box cover has been reinstalled as per usual.

TM#1 has been moved from the west station to the south hot cell had the ThO#1 target removed and then the modules was moved from the south hot cell to the south west silo. Also an electrical check was done on the target before it was removed.

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

Chad, Anders and Alex inspected the target this morning. The target had no significant visible damage to the container. Some material was deposited on the Extraction Electrode.

Phots on DocuShare

Final assembly and alignment of TM2 optics tray continued today. Front section is "aligned".

Ta#45 has been inserted into the hot cell. Swipe taken of inner tool port area: 100000 counts/min.

Ta#45 has been installed onto TM4 and is ready for leak and electrical check. High current fasteners torqued to 130 in.lbs.

TM#4 electrical checks with and without the target installed, installed target is Ta#45.

TM2 optics tray build is continuing. Going well. Hope to have assembly and alignment finished by Friday.

Chad and I leak checked TM4 HS water line with new Ta#45 target installed at SHC. Leak detector base leak rate 0.0Xe-9 atm.cc/sec, base pressure 0.0Xe-4 torr. Chad sprayed helium twice on each of HS 2 VCR joints.No leak has been found. The joints are leak tight. The helium pressure test  will be done at CS later.

TM2 optics tray is complete.

Master alignment tray: 0 up/down, 0 left/right

Optics tray: Front 0 up/down, 0 left/right. Middle 0 up/down, 0 left/right. Back 0 up/down, 0 left right.

TM#1 with no target has been moved from the south west silo to the south hot cell for the installation of the UCx target.

Electrical check of TM#1 with UCx#12 attached. See attached PDF for details.

TM#1 with UCx#12 has been moved from the south hot cell to the conditioning station.

On Friday April 17th, UC#12 target was installed in TM1.  One of the copper water lines was bent slightly as the target was lifted into the module which caused ~15 minute delay due to difficulty getting the VCR nut threads to engage.  Other than this the install went smoothly.

During replacement of the containment box panel two of the threaded holes were found to be stripped.  One on the top at the center, the other in the bottom right corner.  These two holes were left without fasteners (see attached photo).  It is unknown at this time whether these holes were already stripped, or if they were stripped during this installation.

On drawing ITA6008 for the Encole 0.5" ceramic standoffs there is a note to match pairs of ceramics to within +/-0.001". This step was missed on the current build of TM2 source tray (ceramics were not measured).

Measured the lengths of the rest of the ceramic standoffs in inventory and they range from 0.5035" to 0.4950" in length. The ceramics have been sorted by length and grouped into bags.