Test @ 156

542 cm

150 cm

The Al foil is large as the M3 wall we can put 1 raw (5 chambers) or 2 rawsThere is an insulating material (varnish) on the wall buy an Al foil to be put on

Test @ 156

Al sheets, Copper braids, Balconies, clamps installed. Thanks to Stas, Pavel & Pavel

Test @ 156

Number of HV cables (LHCb muon type): 5; LNF (Paolo)Assuming that 1 HV channel supplies 4 gaps in parallel, the number of CAEN channels 5;We’ll move the existing HV system close to mockup, use two dedicated patch panels providing both 1x4 and 4x4 connections (one CAEN channel per gap, if needed);CERN, PNPI (Anatoli + Petr)Front-end boards: number of SPB boards: 32 cathode and 12 wire type (704 resistors must be replaced @ CERN Burkhard), i.e. all chambers mentioned above must be fully dressed forever); CERN Number of CARDIAC boards: 32 positive and 12 negative type; Cagliari (Walter)(150 Positive coming to CERN Walter ; 12 Neg. already @ CERN)  Number of LV cables: 8; LNF (Paolo)

Final LV power supply (total current 22A) + Software ; Frascati (Paolo + Michela)  Number of LVDS output cables: 44; CERN (Burkhard) Number of I2C cables: 8; CERN (Burkhard) Number of ACQ modules (used as external counters): 7; Roma2 (Andre’)Cables adapters to connect standard LVDS cable from CARDIAC to ACQ: 28; CERN (Anatoli)

Software: must show 'panoramic’ (cosmics) view without (exist) and with cabling (Rafael,Andre’) EMI antenna has to be improved: the best case to simulate LHC-clock spectrum; CERN, PNPI

Gas mixture lines (with distributor); Emiliano

Maraton sent to CERN (Paolo)One LV board arrived at CERN (Michela)Status of control SW ? (Michela)

HV+LV Cables ordered (Paolo)

ACQ BOARDS :From Andre’ :I investigated the possibility to get more ACQs for the Test at Building 156-CERN. We have 1 ACQ already available and tested, others 3 have to be fixedand will be available into about 2 weeks. Then Roma2 can provide 4 extra ACQs to the CERN Test, which sum 7 if we include the ones already installed in the Test station. Any other ACQ will be difficult to provide(but not impossible).

SPBs: new resistors tested by Nikolay:

Dear gentlemen,I spent more time to continue  sparkling these resistors . conditions  the same (3KV, 680pF); setup the same. #res.       initial resistance    sparkles    final resistance1                 8.2 Ohm            200000     8.2 Ohm2                 8.2 Ohm            120000     8.2 Ohm   3                 8.2 Ohm             40000      8.2 Ohm   4                 8.2 Ohm            420000     8.2 Ohm   5                 8.2 Ohm            320000     8.2 Ohm   6                 8.2 Ohm            360000     8.2 Ohm    I think that it is enough measurements to understand that this type of resistors is good for our chambers.Best regards, Nikolay