Minutes of the Geneva AMS group meeting on August 8, 2000
Geneva AMS group meetings
Next week there is a TIM( Technical Interchange Meeting and Safety Review
Rehersal) meeting at CERN. Thursday morning there will be a progress report
of all detectors. Electronics and GSI test beam meetings are also foreseen.
Last thursday began finally the AMS01 tracker dismantling. The two external
planes were taken out from the detector. The internal planes dismantling is
foreseen for the end of this month.
PL shows the last kapton modifications with Wallraff holes for internal and
external layers. Also he presented some offers from some companies. Meetings
with them will be held next week at CERN.
Some advances on test system. Analog part design will be ready next week. The
final card is a bit big (25x15cm) but it decouples everything. After that
needed 1-2 weeks for PCB production and 1 week for assembly. Most likely will
not be ready for September test beam. Anyway there is still a chance for use
last days of test beam to test a baby ladder. Interface between PC and
digital card is also possible. This week will be tested the velocity transfer
Last week there were the first meeting for GSI electronic test beam. THis
test beam will be between 3-10 november. Proposed to be there Giovanni(?),
Pascal (army?) and Eduardo.
Rouland shows us the results about AD8051/2/4 op-amp total dose test. His
presentation can be found here . In
summary AD8051(TDR) and AD8052(hybrydK) shows good shape after
radiation. Some problems with AD8054(hybridS). Next week will be repeated the
test for AD8054 to be sure everything is correct.
Next week will be done the electrical prototype (12) for the test beam. No
microsouldure before 21th august. Luckely test beam will begin 1st setptember
instead of 25th august so we will be on time. After this one it will be
constructed the baby ladder and lately the mechanical prototyopes.
On the 12-ladder mechanical prototype has been discovered a problem. The
point is that the jig is 30um short probably due to a temperature variation
in the clean room, before ~24C and now ~21C. Philipp is investigating. It
seems it will be no important consequence for ladder assembly.
- TIM: Aug, 14-18, 2000, CERN
- Geneva AMS group meeting: Aug. 22, 2000, 10am, Ecole de Physique
E. Cortina, Aug 8, 2000