CEA Saclay DAPNIA Micromegas drift chambers COMPASS CEA

CEA Saclay - DAPNIA Micromegas & drift chambers COMPASS

CEA Saclay - DAPNIA COMPASS Slow control for Compass Saclay chambers Françoise Gougnaud, Richard Azoulay, Pascale Deck, Yannick Queinec ( CEA Saclay DAPNIA ) Hao Ren ( IHEP Beijing ) • 2002: 12 MICROMEGAS (MICRO MEsh GASeous) chambers and 2 drift chambers • High voltages 32 channels for the chambers 8 channels for PM

CEA Saclay - DAPNIA COMPASS • Thresholds for Micromegas chambers chip SFE 16 : a Front End Bi. CMOS ASIC dedicated to the Read-out Micromegas 24 busses x 36 SFE 16 x 4 registers • Thresholds for drift chambers 16 channels • Low voltages 48 channels • Gas system

CEA Saclay - DAPNIA COMPASS

CEA Saclay - DAPNIA Hardware • VME CPU PPC MVME 2431 ADAS ICV 196 binary input output VME interface board CAEN V 288 • CAEN SY 127 A 634 2 KV 40µA A 333 4 KV 2 m. A COMPASS

CEA Saclay - DAPNIA COMPASS Software • • Solaris 8 EPICS R 3. 13. 4 medm, strip. Tool SNL Channel Archiver, xarr JAVA graphical interface for thresholds JAVA graphical interface for on-line errors

CEA Saclay - DAPNIA COMPASS Software for High Voltages • • • EPICS software for CAEN SY 127 first developed by Dave Barker from CEBAF in 1994 extension to negative polarity some problems with the response time some problems with the firmware CAEN

CEA Saclay - DAPNIA COMPASS Software for Thresholds of Micromegas VME configuration files . . . archives 24 busses x 36 SFE 16 SNL prog. specific board 24 bit pattern ADAS ICV 196 JAVA graphical interface ASCII file of configuration for 24 busses of 36 SFE 16 chips of 4 registers of 12 bit . . . interrupt every 14 sec.

CEA Saclay - DAPNIA COMPASS THRESHOLDS FOR DRIFT CHAMBERS • ADAS VME ICV 714 analog output board 16 channels • the EPICS driver was written for TTF Injector at Desy • interface with medm for June • JAVA interface for next autumn

CEA Saclay - DAPNIA COMPASS POWER SUPPLIES FOR LOW VOLTAGES Micromegas: 12 power supplies 24 A + 6 power supplies 100 A Drift : 4 power supplies 24 A + 2 power supplies 100 A 48 readback channels VME board ADAS ICV 150 and GPIB ? INTERFACE WITH THE GAS SYSTEM ?

CEA Saclay - DAPNIA COMPASS

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