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FEE Controls. Main Goals: Define “common language” to describe DCS subsystems for all ALICE subdetectors Identify problematic points Find and implement solutions. Example: ALICE SPD. SPD Elements. Readout Chip. Pilot MCM. Bus. Detector. 2mm. 11mm. SMD component. 7. 7. 7. 6.
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FEE Controls • Main Goals: • Define “common language” to describe DCS subsystems for all ALICE subdetectors • Identify problematic points • Find and implement solutions Alice DCS Workshop 18-3-2002
Example: ALICE SPD Alice DCS Workshop 18-3-2002
SPD Elements Readout Chip Pilot MCM Bus Detector 2mm 11mm SMD component 7 7 7 6 235 µm 5 Aluminium 4 3 2 1 Polyimide PIXEL DETECTOR 400 µm READOUT CHIP COOLING TUBE Alice DCS Workshop 18-3-2002
R1 =4 cm R2 =7 cm SPD Layout Alice DCS Workshop 18-3-2002
SPD DCS Architecture Half-stave Voltage Regulators HV LV Alice DCS Workshop 18-3-2002
SPD DCS Architecture PVSS Control + Monitoring Half-stave Voltage Regulators HV LV Alice DCS Workshop 18-3-2002
SPD DCS Architecture PVSS Control + Monitoring Router (VME) DAQ JTAG MCM Data Half-stave Voltage Regulators HV LV Alice DCS Workshop 18-3-2002
SPD DCS Architecture PVSS Control + Monitoring Router (VME) DAQ DCS JTAG MCM Data + SC T I,V Half-stave Voltage Regulators HV LV Alice DCS Workshop 18-3-2002
SPD DCS Architecture PVSS Control + Monitoring Router (VME) DAQ DCS JTAG VR JTAG MCM Data + SC T I,V Half-stave Voltage Regulators HV LV Alice DCS Workshop 18-3-2002
SPD DCS Architecture PVSS Control + Monitoring Router (VME) DAQ DCS JTAG VR JTAG MCM Data + SC T I,V Half-stave Voltage Regulators HV LV Interlock 1 2 Alice DCS Workshop 18-3-2002
SPD DCS Architecture PVSS Control + Monitoring Router (VME) DAQ DCS JTAG VR JTAG MCM Data + SC T I,V Half-stave Voltage Regulators HV LV Interlock 1 2 Alice DCS Workshop 18-3-2002
SPD DCS Architecture PVSS Control + Monitoring Router (VME) DAQ DCS JTAG VR JTAG MCM Data + SC T I,V Half-stave Voltage Regulators HV LV Interlock 1 2 Alice DCS Workshop 18-3-2002
SPD DCS Architecture PVSS Control + Monitoring Router (VME) DAQ DCS JTAG VR JTAG MCM Data + SC T I,V Half-stave Voltage Regulators HV LV Interlock 1 2 Alice DCS Workshop 18-3-2002
Alice 1 Readout channel Pixel Cell Parameters: 3 Local Threshold Adjust Bits 1 Mask Bit 1 Test Bit Readout Chip Parameters: 44 x 8-bit DACs SPD Total: ~ 50.000.000 configuration bits Alice DCS Workshop 18-3-2002
Some Open Questions • Hardware and Software Implementation (eg. JTAG) • Monitoring Strategy • Single event Effects Alice DCS Workshop 18-3-2002