Minutes of the Geneva AMS group meeting on May 16, 2000
Geneva AMS group meetings
New estimation on tracker weight ~153 kg (no major changes). This weight does
not includes the cable and te cooliong systems that are in differents weights
budgets. For the cooling there is a total budget around 280 kg, but still has
not been assigned budgets for subdetectors.
Cooling issues. Bart has contacted with NLR and Carlo Gavazzi also. They are
going to hold a meeting next thursday at Amsterdam. Eric has been asked to
assist this meeting to "control" what is discussed there. Divic has been
asked also to supervise.
Legs: two possible companies, one swiss and the other german, none of them
excluded so offers demanded to both. Renforts, the company that is going to
manufacture them agreed to build only some spares above the 192 needed. In
case of necesity it will be comanded some more.
Eric has sent some documents for the PDR (Plane modifications, tracker
Divic has discovered a small differnece between AMS01 and AMS02 calbe
specifications concerning the drain wires (different sizes and electrical
properties). He is looking for the implications. A preserie should be
M. Pauluzzi did not succeed with the italian company to construct the
Upilex. In fact there is no candidate able to depose the Ni on the pads.In a
couple of weeks there will be a meeting at CERN with CREO. SOme Unige
presence has been requiered there. Before that meeting should be arranged one
Due to military duties of the technician, the hybrid vibration test will be
done at EPFL after August. There is the possibility to perform it before 19th
June, but by this date there will be no hybrid available.
Silicium meeting to revise the results, yield and selection of sensors will
be most likely during the Perugia meeting next June. As there is no
measurement to crosscheck it is not possible to held it before.
All dummies finally at Geneva. They will be sent to be cutted to Finland next
week. It has been explained that some metrology should be provided to the
finish to assure a nice cut.
Radiation test (total dose) will be done finally at Geneva.
Markus report about the Erice meeting. V. Plyaskin and I. Galktionov are the
responsibles of the detector and physics parts of the Physics Report. It was
commented the results from
Boomerang collaboration about universe flatness.
Nature paper). Also a nice bump proton spectrum around 50 GeV was
presented. The explanation is that this bump correspond to some SN remanence,
so it should dissappear with time. From the detector point of view it will be
developed two new triggers, one to detect the photons converted at TDR and
the other for Z>2, view that particles from nuclear reactions with the
detector can reach the anticounters and veto these events (this could explain
the oxygen deficit!!!). It has also finally decided to put a "Star Tracker"
with an angular resolution ~4 arcseconds. ToF will measure also dE/dx with
the dynode in order to enlarge the range. Magnet people informs that 90 km of
superconducting cable has been alredy produced. Superbe food, nice nigth
talks and friendly ambiance.
- Geneva AMS group meeting: May. 23 , 2000, 10am, Ecole de Physique
- Tracker meeting: Jun 12-13, 2000. Hotel Gio-Perugia. Everybody
- PRD: June 2000, KSC.
- AMS electronic meeting: Jul 7-10, 2000, Taiwan. GA,ECG.
E. Cortina, May, 16, 2000