From novaes@fnal.gov Fri Oct 26 19:04:10 2001
Date: Fri, 26 Oct 2001 18:59:45 -0500
From: Sergio F. Novaes <novaes@fnal.gov>
To: novaes@fnal.gov
Subject: FPD News 26/Oct/2001
    [http://www-d0.fnal.gov/fpd/FPD_News/news.html]


Eduardo Gregores
Tuesday, October 23, 2001
Progress

- All 8 cartridge tops with MAPMT's are ready. Some trimming perhaps still
needed. Waiting for further looks regarding this issue.

- L0 PMT's sockets tested. Results on files L0_BASES(1,2,3,4).SUM on
computer at DAB. See log book for details.

- Cartridges cables bunching and labeling under way.
__________________________________________________________________________

Michael Strang
Tuesday, October 23, 2001
Detector progress

All of the MAPMTs have been incorporated into Cartridge Tops

The L0 bases were being tested

Every fiber of Dt3 has been mapped to get a feel for the machine and the
way the fibers are located in a detector. Takes far too long to map
every fiber (~3 hours per part, 9 hours per detector if everything goes
well, which it didn't this weekend), after discussion with Gilvan, 3
overlapping fibers should be sufficient to "turn on" a channel of the
tube (~45 minutes / part, ~2.5 hrs / detector). Have had a quick look at
the data to make sure that it makes sense (i.e. the fibers are
overlapping between primed and unprimed frames the way we expect,
however, segment size varies greatly through a frame).

First new mapped detector should be ready by Thursday with another
available each day thereafter.

Pr2 (A1U) prepped and will be ready to be reinstalled in the tunnel this
afternoon.
__________________________________________________________________________

Gilvan A. Alves
Tuesday, October 23, 2001
Progress

We (Victor, Pierrick and Gilvan) spend many hours looking
for noise sources. We tested the noise levels at the ADCs
first with just cables pluged at the AMP/Shaper backplane,
but power off, then we started to insert amp boards one by
one to see if there was any effect from some board in particular.
        We can see that the noise pickup from cables is very small,
even with the power on(shappers off the crate). Once we plug the
shapers then the noise levels realy grow very much, but there
are no board in particular that introduces the noise. This noise
can still be related to ground loops, since when you plug the
shapers you make a ground path between the SCR and tunnel through
the signal cables, so this could be solved with the isolation
transformers.
        Another test we did was raising the +- 10V supply to 12V
and check for any effects. Actually the P2 supply can only go as
low as 11V, so the test was 11, 11.5 and 12V settings. We did not
observe any effect due to increasing of the voltage on the ADC
pedestals or noise. The only effect was a clear heating of the
shaper boards, so keeping the voltage low helps, as expected.
__________________________________________________________________________

Michael Strang
Wednesday, October 24, 2001
Cartridge status

Eduardo was trained in detector mapping. He will map the U/V planes then
I will assemble them and map the X frame and the alignment of the
pieces. He was beginning work on mapping Dt4 this evening and it will be
completed tomorrow.

Work continues on modifying the cartridge tops based on Newton's
suggestions. I'm ready to assemble Dt3 into the tube but would like to
have Newton's input on this step first to make sure I'm doing it right.

Disassembled Dt1 and Dt2 from the cartridge bottoms so they can be
mapped.

Dt5 and Dt6 are aluminized and ready to be mapped.

Jorge tried to test the CT for Pr2 (A1U) but there was a short somewhere
in the HV splitter (this is one of the mixed kind of cartridge tops). He
was fixing the problem and was going to retest the cartridge this
evening. I don't know the final results.

Cables have all been labeled in bunches of seven ready to be
incorporated into tested CTs.
__________________________________________________________________________

Eduardo Gregores
Thursday, October 25, 2001
Detectors update

Sergio and I finished finishing the cartridge tops. All 8 are ready to use.
Detectors 4U and 4V have been mapped and the data saved in the files DET4U
and DET4V. See Lab3 logbook for coments on these acomplished tasks.

__________________________________________________________________________

Michael Strang
Thursday, October 25, 2001
Cartridge update

Detectors 5 and 6 picked up from Eileen and prepped for mapping.

Detectors 1 and 2 removed from CBs and prepped for mapping.

CT for A1U fixed and tested. Jorge was going to install it in the tunnel
at the P1U position after the test.

Sergio mentioned difficulties in inserting detectors into the dipole
position. I looked at the CB tube that caused the problem and found that
it was rotated 45 degrees out of spec. I assembled a pseudo detector
bottom for a quick test to see if that is sufficient to remove the
problem or not.

A tube in one of the CTs had a broken signal pin on channel 15. It was
swapped out with an appropriate spare. It is likely that the broken tube
can be repaired.

Tomorrow Goals:
Assemble Dt4 and map the X plane (this will be 2 of 6 detectors
completely mapped).

Eduardo can start mapping Dt5 U and V.

Meet with Newton about Detector incorporation into tube and then
incorporate Dt3 and Dt4 over the weekend (and Dt5 if it gets mapped).

Jorge work on assembling HV splitter for the CTs when not working on
other things.
__________________________________________________________________________

Eduardo Gregores
Friday, October 26, 2001
Friday activities

    - LMB's: cables located and started pulled half way through DZero. Looks
possible to divert them around DZero.
    - Detector Mapping: Detector-6, frames U and V mapped. Comments on Lab3
logbook.
    - Detector Assembling: All 8 tops with MAPMT's have been cleaned from
dust by blowing compressed air, and stored on the clean room.

__________________________________________________________________________

 Sergio F. Novaes                                                Fermilab
 E-mail: novaes@fnal.gov                                     P.O. Box 500
 Phone: (630) 840.2454                                   Mail Station 352
 Cell:   (630) 272.1819                            Batavia, IL 60510-0500
 Fax:   (630) 840.8886                                                USA
__________________________________________________________________________