g.de cataldo-A. Franco INFN bari Investigated solutions and market survey for the HV-LV sub-systems

g.de cataldo-A. Franco INFN bari LV-HV Sub-systems CAEN solution: Resulting detector segmentation Power requirements/segment V A W FEE (3.2)13.5 (9.0) FEE (3.4)14.0 (9.5) ADC ADC MCM Power requirements/segment V A W FEE (3.2)13.5 (9.0) FEE (3.4)14.0 (9.5) ADC ADC MCM MCM Segments 4 ADC Segment 9 FEE Segments, 180 (120) GASSIPLEX each 9 HV Segments, 36 (24) wires each, this requires a grouping of 12 sense wires 12 MCM Segments 4 ADC Segment 9 FEE Segments, 180 (120) GASSIPLEX each 9 HV Segments, 36 (24) wires each, this requires a grouping of 12 sense wires FEE 1FEE 2 FEE 3 FEE 4FEE 5 FEE 6 FEE 7FEE 8 FEE 9 MCM1MCM2MCM3MCM4MCM5MCM6 MCM7MCM8MCM9MCM10MCM11MCM12 ADC1 ADC2 ADC3 ADC4 H1 H2H3H4 H5H6 H7 H8H9 7 x HMPID MODULE 3 x CAEN SY1527 (TCP/IP protocol) Boards: 9 x A1517 3V-6A (prot. by the end of 6/2001) 11 x A1518 5V-3.6A (.. by the end of6/2001) 6 x A1821A 3kV (Delivered and test under way) 7 x HMPID MODULE 3 x CAEN SY1527 (TCP/IP protocol) Boards: 9 x A1517 3V-6A (prot. by the end of 6/2001) 11 x A1518 5V-3.6A (.. by the end of6/2001) 6 x A1821A 3kV (Delivered and test under way)

g.de cataldo-A. Franco INFN bari Layout of the CAEN solution Front view Rear view

g.de cataldo-A. Franco INFN bari Power requirements for each segment V A W FEE FEE ADCa+b ADCa+b MCM Power requirements for each segment V A W FEE FEE ADCa+b ADCa+b MCM MCM Segments 1 ADC Segment 6 FEE Segments, 480 GASS. each 6 HV Segments, 48 wires each LV-HV Sub-systems WIENER or EUTRON based solution: assumed detector segmentation For both these solutions, the HV PS is still based on the CAEN SY1527 MCM1 MCM2 ADC1a ADC1b FEE 1FEE 2FEE 3FEE 4FEE 5FEE 6 H1H2H3H4H5H6

g.de cataldo-A. Franco INFN bari The Master Power Box can operate via RS232 up 8 slave crates CANbus up to 127 crate TCP/IP offers performance for larger numbers of channels. Master power 3U box: Max DC Power/box =2.5 KW Up to 12 PL600 modules/box One module consist of one floating ch. 2..7V - 25A max 175W Master power 3U box: Max DC Power/box =2.5 KW Up to 12 PL600 modules/box One module consist of one floating ch. 2..7V - 25A max 175W FEE : 42 segments x 2 polarity 84 modules ( 2.8Vx12.7A=36.5W) MCM : 14 segment 14 modules (+5Vx18A=90W) ADC : 7 segments x 2 polarity 14 modules ( 5Vx16A=80W) Layout of the WIENER LV units Master Power Box

g.de cataldo-A. Franco INFN bari Layout of EUTRON-PLC devices EUTRON PS Units PLC SIEMENS S7300 Connecting and sensing Board TO HMPID MODULES 3 x EUTRON BVD 720S 0..8 v 25 A 1 x EUTRON BVD 1500S 0..8 v 50 A For the EUTRON solution the power switching and sensing of each LV channel are based on a Siemens PLC system (relays and ADC modules) and a custom sensing board. This solution requires a control program developed ad hoc by the user.

g.de cataldo-A. Franco INFN bari First cost estimation (cables and connectors not included) CAEN HV-LV EUTRON LV + CAEN HV (PLC software development not included) WIENER+ CAEN HV LV HV CHF CHF

g.de cataldo-A. Franco INFN bari The EUTRON-PLC Control System Requirements list; Requirements list; The control system as a Finite State Machine ; (bubble chart) The control system as a Finite State Machine ; (bubble chart) Apparatus layout and technical specifications of the sensing board; Apparatus layout and technical specifications of the sensing board; the PLC readout software. the PLC readout software. E. Carrone,

g.de cataldo-A. Franco INFN bari The Requirements list FEE LV switching ON: since the FEE requires ±2.8 V then both these polarities must be supplied contemporary, FEE LV switching OFF: before a FEE segments is switched OFF, the facing HV segment (see St.Rep3 at must be switched OFF. This sequence is mandatory to prevent FEE breakdowns due to charge accumulation on the MWPC cathode pads. (In fact the ground reference to the MWPC sense wires is ensured trough the FE electronics, then the low voltage at the corresponding FE electronics segment must be applied before the HV segment is switched ON); Current and voltage ranges: V load I load must be in the admissible range: V min I max then the corresponding HV-LV segments must be automatically switched OFF according to FEE LV switching OFF sequence Alarms handling … … FEE LV switching ON: since the FEE requires ±2.8 V then both these polarities must be supplied contemporary, FEE LV switching OFF: before a FEE segments is switched OFF, the facing HV segment (see St.Rep3 at must be switched OFF. This sequence is mandatory to prevent FEE breakdowns due to charge accumulation on the MWPC cathode pads. (In fact the ground reference to the MWPC sense wires is ensured trough the FE electronics, then the low voltage at the corresponding FE electronics segment must be applied before the HV segment is switched ON); Current and voltage ranges: V load I load must be in the admissible range: V min I max then the corresponding HV-LV segments must be automatically switched OFF according to FEE LV switching OFF sequence Alarms handling … … It is intended to specify all the procedures to operate properly the LV power supply units while connected to the FE electronics. An incomplete example could be: E. Carrone,

g.de cataldo-A. Franco INFN bari OFF ( P.S. in Standby, relays OFF and Vout=0) Calibration ( reading V output from units ) Configuration ( FEE segment selection ) Standby (LV system in STBY status) ON ( Ready For Physics: P.S. STBY removed, check of Current/Voltage values ) OFF ( P.S. in Standby, relays OFF and Vout=0) Calibration ( reading V output from units ) Configuration ( FEE segment selection ) Standby (LV system in STBY status) ON ( Ready For Physics: P.S. STBY removed, check of Current/Voltage values ) The control system as a Finite State Machine: state definition state definition E. Carrone, Taking into account the requirement list and how to properly operates the EUTRON units, the following states have been defined:

g.de cataldo-A. Franco INFN bari LV C.S. representation STATES OFF Stop Running Filling Ready When the ON state is active I load and V load are monitored on all the active FEE segments. If one of these values is out of range then the relevant FEE segment is switched OFF and the HV system is contemporary notified to switch OFF the corresponding HV segment. During the transition ON->STBY the HV status must be checked and if it is HV-ON then the LV C.S. must kill the HV system. When the ON state is active I load and V load are monitored on all the active FEE segments. If one of these values is out of range then the relevant FEE segment is switched OFF and the HV system is contemporary notified to switch OFF the corresponding HV segment. During the transition ON->STBY the HV status must be checked and if it is HV-ON then the LV C.S. must kill the HV system. COMMANDS START RUN FILL PURGE STOP MAN RESET COMMANDS START CALIBRATE CONFIGURE STOP SUSPEND FEED RESET CONF STBY ON CAL OFF CALIBRATE CONFIGURE START STOP SUSPEND FEED ALARM Alarm Condition RESET STATES OFF CALibration CONFiguration STBY Standby ON Ready ALARM LV: the bubble chart representation E. Carrone,

g.de cataldo-A. Franco INFN bari Apparatus Layout Power Supply: EUTRON BVD720S, 0-8V, 0-25 A. PLC: Siemens S300 Analog Inputs 8 x 12 bit. Power Supply: EUTRON BVD720S, 0-8V, 0-25 A. PLC: Siemens S300 Analog Inputs 8 x 12 bit. E. Carrone, Dummy resistive Load Power Supply Siemens S300 PLC Ethernet NT Workstation V load sensing line Power line CH1/2 I load sensing line Set and reading PS V out from-to PLC relays Sensing Board Sensing Board In order to split the PS current into several channels, each one connected to one FFE segment, a PLC relays module is used. The V load -I load measurement is based on a sensing board read out via 8CH ADC module.

g.de cataldo-A. Franco INFN bari Sensing Board E. Carrone, V s + V s -

g.de cataldo-A. Franco INFN bari The input stage of the ADC accepts the max Common Mode Voltage U CM = 2.5V. This imposes a V sensing attenuation via a resistive net (U CM = (Vin+Vo)/2 3.9 V). Signal Conditioning E. Carrone, With the ADC LSB of 22.4 V in the range +-80mV, a current sensitivity THE NET RESISTOR sin R RR VVV RR R VVV RR R V RR R RR R VVVV pedsrgseng pedsr gseninsssr In order to measure the V ped, R sens has been put in short circuit (V sensing =0) and this resulted in Vped=5 mV. To evaluate the U cm attenuation factor A= R4/(R3+R4), V sr and V sensing have been measured and it resulted in A=0.1325: V sensing = (V sr - V ped )/A Finally I load = V sensing / R sens =LSB/A*Rs= 2.8 mA =LSB/A*Rs= 2.8 mA on the I load is achieved. This allows the C.S. to detect the single FEE chip failure which drains 45 mA per polarity.

g.de cataldo-A. Franco INFN bari PLC VAT (Variable Table) ADC brute value E. Carrone, PIW 288V sensing + ADC---DEC8872 PIW 290V sensing – ADC---DEC PIW 292V load + ADC---DEC15496 PIW 294V load – ADC---DEC MD 100"I load +---REAL MD 108"I load ----REAL MD 132"V load +---REAL MD 124"V load ----REAL MD 20"V sensing + input ADC---REAL MD 28"V sensing - input ADC---REAL [V] [A] [mV] Process Input Word Memory Double Word

g.de cataldo-A. Franco INFN bari PLC Instruction List NETWORK TITLE =Sensing Current CH + AN Q 4.1; S Q 4.1; AN Q 4.2; S Q 4.2; AN Q 4.0; S Q 4.0; AN Q 4.3; S Q 4.3; L PIW 288; ITD ; DTR ; L e-003; *R ; T V sensing + input ADC"; L e+000; L V sensing + input ADC"; +R ; T MD 68; L MD 68; L e+000; *R ; T MD 84; L MD 84; L e+001; /R ; T "I load +"; Relays switches ADC reading value [mV] Pedestal offset 1/A where A=attenuation factor V I Conversion Integer: 16 bit 32 bit Integer 32 bit IEEE-FP 32 bit E. Carrone,

g.de cataldo-A. Franco INFN bari The Configuration Program A devoted program reads from a file the HV sub-system configuration ( # HMPID modules, HVsegment/module) and creates the DataPoint data base in the PVSS environment. These data points are automatically created according to the specified variables (Crate/Board/Channel) of the CAEN OPC Server and it sets a link between the OPC variable addresses and the PVSS data base. Control System for the CAEN SY1527 in the PVSS environment.

g.de cataldo-A. Franco INFN bari Monitoring panel of the HMPID HV System Alarm condition Segment disabled Burned-out Segment Link to the Enable/Disable Panel Link to the Channel Configure Panel Link to the Monitoring Panel of SY1527 Link to the Monitoring Panel of the HV segment

g.de cataldo-A. Franco INFN bari Monitoring panel of the HV Segment (when the CAEN SY1527 OPC serv. Is running!) Channel Name Actual value of Parameters Trend parameter Chart Channel settings Channel Status HV-ON Trend display settings

g.de cataldo-A. Franco INFN bari Enabling/disabling HV Segments Segment Enabled Segment Disabled Option for global Enable/Disable action Exit

g.de cataldo-A. Franco INFN bari HV Channel configuration Parameter Name Parameter Value Cancel all the changes Save the present configuration Exit

g.de cataldo-A. Franco INFN bari SY1527 Control panel System Name Crate Alarm condition Crate Front panel status Power Fan & Power unit Status Inserted board status Board description Crate commands Crate settings Empty slot

g.de cataldo-A. Franco INFN bari HMPID DCS: LV prototype panel