[Halld-pid] TOF Work plans

[eugenio at fsu.edu]

Hi,

Here is a summary of our plans discussed this past Monday.   Please let me know if I missed something or have anything wrong.  Also, I would like to confirm the items I have listed (?)  as Tom either coordinating or purchasing.





Paul



To eliminate over constraining the modules we agreed to open up the TOF support frame to 100.5" x 100.5".

===Task list====
* Open holes in channels
	- two holes on each channel need to be enlarged by 1/4" on the OD.
	- the hole location is the 10th hole from the end on both sides, the ~1/4 & ~3/4 location (most have been marked).
	- including all 8 channels, 16 holes need to be enlarged 
	- Tom will take care of this by Monday (?)

* Slot-open the bolt holes in Aluminum holding blocks
	- a 1/2" slot is being machined in each holding block
	- this will allow the frame and stud movement (1/4" on both sides) while keeping the holders fixed to the light guides
	- Paul is having the work done at the FSU Machine Shop  and will deliver the parts next week

* Open up TOF frame and square to 100.5"
	- Tom will coordinate this effort by Monday (?)

* Replace channel end bolts with threaded rod
	- first (vertical) TOF layer:
		--replace outer channel bolts with threaded rod and set nuts 
		-- bolts can be used for the inside channel holes
	- second (horizontal) TOF layer
		-- replace both channel bolts with  threaded rod and set nuts 
	- Tom will order new rods and nuts for delivery by Monday (?)

* Replace channel Buna-N rubber (thicker/softer)
	- first (vertical) TOF layer: 
		--currently  3/32" (50A Durometer)   change to   3/16" (40A Durometer)
	- second (horizontal) TOF layer: 
		--currently  3/16" (60A Durometer)   change to   1/4"   (40A Durometer)
	-Paul will order new Buna-N material for Monday

* Repair remaining TOF module
	- Hussein will complete the repair of the last damaged TOF module.

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--
Prof. Paul Eugenio
Florida State University
Department of Physics
Tallahassee, Florida,  USA 32306

(850) 325-0314
eugenio at fsu.edu