Tony's webpage
Klaus's Status Report
OU's Status Report
Dave Bowman's notes
Status Report
WC2 progress report:
1. Spending of $15K matching capital equipment funds that our department
chair wants us to spend NOW.
* Option 1: CAEN V1190A, 128 channel multievent, multihit TDC
(100,200,800 psec LSB) = $8390
+ requires "special" VME crate with VME64x =$4866
total = $13256
* Option 2: Two CaenV767 128 channel multihit TDC
(800 psec LSB)
2 x $7170 = $14340
CAEN V1190 is closer matched in its properties to the F1, but we can
only afford one with no spare. For purposes of testing drift chambers
at VT, we will probably go with Option 2 to have two TDCs here for
testing. They will be adequate for the resolution we want. At some
later date, we can get F1 TDCs at JLAB for testing here.
2. Frontend electronics: Since the MAD chip infrastructure may take
some time to get developed, we are trying to purchase several (10 or so)
of the N-277 card from Nanometric Systems. This is the same as the
card that is used on the SOS and HMS drift chambers.
3. Simulations: Juliette is working on two things:
a) Generating plot of Moller rate and e-p bend angle versus
mini-torus current for bending up. We had studied bending
down more extensively, but it is clear we want to bend up now
to avoid interfering with the QTOR support structure.
b) Generating e-p distributions at the focal plane with mini-torus
on to see if the distribution is disrupted, and to see what QTOR
currents are needed to make things work with mini-torus on and off.
4. Question about chamber materials: For the wire chamber frames
does anybody see any problem using delrin? It is much easier to
machine than G10. Norm Morgan has verified that G10 readout boards
can be bonded very well to the delrin.
