Minutes of March 2 2020 ArgonCube2x2 Installation Meeting
- Attendee: Jim, Tom, Andy, Min Jeong, Gary, Min Jeong, Steve and Ting
- Safety walk-through observations and responses
- Steve responded the 5 observations from the safety walk through done at Feb 14.
- Correction/notifications were made for point 1,2,3,5 - garbage overflowing, ladder use safety, chrome plated wrench sockets and loose garden hose.
- We need to design replacement handrails to address observation #4
- Replacement handrail for minos catwalks
- The old ones can not be found anymore. We need to design a set of replacements
- It looks like we are missing handrails on both east and west. East side is for sure. Need to confirm the status on west side
- Jim is in the process of design a replacement set.
- Safety requires the rail to handle 200 lbs load.
- Jim to report back on design status
- MINOS electronics disassembly
- Steve gave a detailed plan on the disassembly -- see his slides
- He has a list of things we will save (in green color ) and we will discard (red color)
- Cables to be saved: Ethernet cables, serial cables from VME crate and computer, HV cables from distribution cards
- We also want to save Alner PMT boxes, cable trays, wiener PS, LeCroy HV PS, BiRA RPS and switchboxs, and racks
- Optical cables from scitillator to PMT boxes need to be cut or disconnected in order to allow detector planes be removed
- Cable trays need to be removed as they are attached to the racks
- Steve to complete the HA for approval
- We have some discussions on when and where to move the racks:
- Storage space or staging area for those racks are a concern.
- We can either use MSB or MSB upstream space
- MSB will be quite crowded during plane removal stage
- upstream MINOS hall will be freed after plane removal
- Jim has special tool/crane basket to transfer 4 racks at a time through shaft
- We will discuss this more. Likely, we will leave the racks on catwalk and move them after MINOS planes being removed.
- We will need more discussion on manpower requirement: students/postdoc and electrical technicians
- Magnetic coil disassembly
- Jim and Tom propose to cut the coil frame to 10ft pieces before taking them out through shaft
- The 60' long frame will cut lose from both downstream and upstream end first so they can be pulled out from insertion hole
- We will pull out the top piece from the plane insertion and cut them into 10ft pieces
- We will do the cutting using an electrical reciprocating saw Tom has
- The saw is from UNITEC model 512150070 -- Tom brought the manual to the meeting
- The saw weights less than 8kg
- The saw can handle easily the frame which as a cross-section about 9"
- Tom claims the saw Has little back-kicking
- We can support the cut piece either by hooks from crane or a table jack
- The saw is being used at the lab for other project
- Tom and Jim will write a new HA to replace HA2130 which will discuss more next time
- AOB:
- We discuss the need to cover the storage rack as more modules are to be put there soon for argonCube use
- We expect to start save modules starting module set 5 (MS5)
- Howard will select the starting set and let the crew know
- we will save 22 modules from tracker section, 10 e-cal modules and 8 or more h-cal modules
- Next meeting is March 16 which we focus on HAs from MINOS electronics disassembly and magnetic coil removal.
There are minutes attached to this event.
Show them.