1. Status of the PSD upgrade - Status of production of new temperature, HV control systems MAPD gain monitoring system. -Status of the PSD temperature stabilization system - Nearest plans F.Guber, A.Ivashkin, O.Petukhov (INR, Moscow) General EVO, 10 December 2013 1

2. Status of FEE and slow control system MAPDs Al-plate+ T-sensor LED source HV channels 10 Analog signals +trigger (adder) SC connector PCB with amplifiers and adder Successfully tested in October. Mass production is in progress. First 20 modules will be ready at the end of December. Another 30 modules – end of January 2014 2

3. Scheme of MAPDs temperature stabilization by Peltier element Heat sink PELTIER COOLER Temperature sensor Copper heat sink Al plate External TEC controller PSD module electronics Compressed air T s -sink temperature sensor T o -object temperature seensor ToTo TsTs

4. Structure of new PSD electronics in the module with Peltier cooling 4 60 layers Al plate HV distributor PCB board End cover Plastic tube Lead-scinti, WLS-fibers with 11 optcal 10 SiMs board with with electronics with air inlet from air ~120 cm connectors T sensor (Power 0.5W) distributor box Air distributor box Pumped air Temperature in this area should be ~22 ◦ ±1 ◦ Copper sink Peltier with sink & controller

5. 5 The TEC-1091 is a specialized TEC controller / power supply able to precision-drive Peltier elements. It features a true bipolar current source for cooling /heating, two temperature monitoring inputs (1x high precision, 1x auxiliary) and intelligent PID control with auto tuning. The TEC-1091 is fully digitally controlled/ TEC Controller 2 controllers and 2 Peltier elements (30 x 30 mm 2 ) have been bought in November and now are testsing.

6. 6 Some photo of new PSD electronic prototype

7. PSD upgrade plan: -December ( 2013 CERN) Test cooling system in one module with real TEC controller and Peltier. -End of January – end of February (CERN) Installation and test of the PSD electronics and cooling system for 16 central modules. -April Installation and test of the PSD electronics and cooling system for 28 outer modues. Summer 2014 the PSD test with cosmic rays. October 2014 – test/calibration of the PSD with proton (better with muon beam!) Estimated beam time ~ 3-4 days. 7 Martin help is needed in December –April !

8. 8 Cost estimate of the PSD cooling system upgrade based on the Peltier elements -Petlier elements ~ 20 Euro/pc ~ 1200 CHF -TEC controllers 50 x 180 CHF ~ 9000 CHF -Temperature sensors – 100 pc ~ 200 CHF -Power supplies -?? -Auxiliary materials and tools ~ 1000 CHF -Total ~10-15 KCHF To get all components at the end of January we need to order its NOW

9. 9 BACK UP

10. Matching with readout electronics (present and future variants) 10 Shape and amplitude of MAPD signal after amplifier are PMT like ones. Easy to adapt to any readout scheme. Present variant : MAPD Fast Amp. G=30 Signal adapter Slow amp.- integrator CB Future variant : MAPD Low gain output G=30 DRS High gain output G=30x4 DRS (for high energy deposition) (for low energy deposition + muon calibration) or/and