1 STAR Forward GEM Tracker Safety Review Electrical Gerard VisserIndiana University Cyclotron FacilityJohn T. AndersonArgonne National LaboratoryBenjamin BuckMassachusetts Institute of Technology9/2/2009
2 Topics FGT electrical overview GEM bias connections Front end electronicsCable plantReadout crate, power supplies and modulesOther FGT electrical equipmentWSC field shaping bias connections
3 Overview I: Readout system integration schematic (simplified) Estimated cable run 65 feet[ WSC → TPC sec 2/3 boundary → sec 2/3 tray out of magnet → 2nd level platform ceiling tray → 2C7/8/9 ]FGT Cables24 FEE signal24 power & remote sense24 HV coax82+2Cable break connectors/boxes located just outside of west support cylinder, on TPC wheel. This point also serves as FGT detector ground tie (to TPC wheel).Internal FEE signal cables: custom low-mass aluminum design with silicone & FEP extruded insulationWiener MPOD controller (1x)ISEG 8 ch HV module (3x)Wiener crate (1x) (FGT custom) U x 220mm cards208 V 1 φDDL fiberethernettrig/clkSGIS (to kill all FGT power)ARM (12x) (APV Readout Module) [IUCF]ARC (2x) (APV Readout Controller) [ANL]
4 Overview II: GEM quadrant assembly and electrical connections 34Terminator boardFR-4, 32 x 38 x 0.8 mmFGT cables to platform2FEE board (2x)FR-4, 259 x 53 x 1.6 mmTotal power 6.9 W per quadrant (ref. slide 5, 6)STAR TPC aluminum structural parts(STAR system ground)see detailed cable info on slide 7Ground wire18AWG stranded12LV & signal patchBud #PN-1320-C64 x 58 x 35 mmPolycarbonate, UL 94HB“Connector” boardFR-4, 65 x 45 x 0.8 mmBias divider boardFR-4, 20 x 275 x 0.8 mmGEM bias patchSHV cable connectorsAnode strip board and ground plane
5 GEM bias system iseg Spezialelektronik GmbH # EHS8060n cathode GEM #1 -6 kV [hardware limit (pot) shall be set at -5 kV]1 mA hardware current limit20 mA current loop permit inputconnectors: SHVgrounded (non-floating) output5kV type, SOA # S3838CVX104K30 or equivalentcathodeGEM #1platformOhmite # OA101KE or # OX101KEGEM #2GEM #3anode strips(to break ground loop for noise/performance reasons)Divider string power: 2.4 W maximum6 kV typeSyfer # 1812Y6K00221MXTTPC west
6 Front end electronics FEE board (prototype) Power: 1.5 W Input supply: V, VMaterials: FR-4, copper, nickel/gold plating, SnPb solder, silicon, encapsulant (epoxy, silica, flame retardant)Signal inputsAPV chip w/ encapsulantConnector board prototypePower (local): 1.5 WInput supply: V, V, fused at source end of cable (ref. slide 8)Remote sense on input supply; all terminals here fused with Raychem # nanoSMDC020F (0.42 A 25 °C, 24 VDC 100 A interrupt rating)Output feed: V, VMaterials: FR-4, polyimide (cable clamp pieces), copper, nickel/gold plating, soldermask, SnPb solder, silicon, package molding compounds (epoxy, silica, flame retardant), stainless steel screwsClock/trg buffersVoltage regulators1.8 V to 1.25 V (2x)2 A maxConnector is for prototype only;direct solder to cable for real board
7 Cable plant detailsInner service combined signal/power cable 24x 6 feetManufacturer: Calmont Wire & Cable Co.P/N: tbd, custom designConstruction: 12pr 30AWG CCAW* / FEP, 10c 20AWG CCAW / silicone, overall Al foil shield, silicone jacketRatings: None, but constructed equivalent to UL 150V, NEC type CL2 or superior ( → pass UL-1581 vertical tray)Connector #1: NoneConnector #2: DB37, AMP # (rated 3 A, 1000 VAC withstanding; service here ≤ 1.6 A, 5 V)1GEM bias HV cable (for inner service and external) 24x 71 feetManufacturer: NK NetworksP/N: ?? – Cable is marked “NK NETWORKS 9943 C MODIFIZIERT FRNC-B - DESY MT”Construction: ??Ratings: Details unknown but the cable is approved by and procured through DESY; said to be made to CERN & DESY specificationsConnector #1: SHV, Huber and Suhner # 11-SHV / NE 133 (similar to RG-59 type except for cable diameters)Connector #2: same, except inner cable only one connector (soldered at detector)2External service signal cable 24x 65 feetManufacturer: BeldenP/N: 1424AConstruction: 12pr 24AWG Cu / foam PE, overall Al foil shield, PVC jacketRatings: UL style 2919 (30 V 80 °C); NEC type CMConnector #1: DB25, AMP # (rated 3 A, 1000 VAC withstanding; service here ≤ 0.1A, 5 V)Connector #2: same3External service power/sense cable 24x 65 feetManufacturer: BeldenP/N: 5307FE (selection is not final, may substitute a similar cable)Construction: 9c 18AWG Cu / PP (or PVC substitute), overall Al foil shield, PVC jacketRatings: UL 300 V 75 °C, 3.5 A per conductor; NEC type CMRConnector #1: Amphenol # A-18-1S (rated 200 VAC, 13 A (test); service here ≤ 1.6 A, 5 V)Connector #2: Weidmüller # BCZ 3.81/09/90F SN BK BX or similar (UL rated 300 V 10 A; service here ≤ 1.6 A, 5 V)4*Note: CCAW = copper-clad aluminum wire (typically used for magnet wire in aerospace equipment). 10% copper cladding by volume. Termination will be by soldering (SnPb).
8 Readout (and power) crate cPCICustomized version of Wiener #6023 6U crate (which is used extensively at STAR)Card depth 220mm (vs. VME standard 160mm)Divided into 3 segments of 7 slots each:MPOD controller and ISEG HV modules (3, double-width)Two segments of 7 slots for readout boards, interconnected with CPCI backplane; each slot has 13 power pins (+5) rated at 0.8 A eachRear connection of cables to FEE, via transition modulesInternal power supplies:24 V 23 A (for HV modules); actual load ≤ 10.5 A2x 5 V 115 A (for readout boards); actual load ≈ 46 A eachDimensions: width 429 mm, height 172 mm, depth 215 mmWeight: 17.6 kgRated mains input range: VAC ± 10% ( VAC)Rated input current: Sinusoidal 16AInrush current: limited to rated input current (cold unit)Input fuse: external, intern on special requestIsolation (input – output) CE / EN 60950, ISO 380, VDE 0805, UL 1950, CDC output power: 3kW maxOperation temperature: 0… 50°C ambient without deratingEfficiency: 75% % (depending on module type)In this configuration, input current 208V at maximum load. Actual for expected load (ref. next slide) V.
9 Readout modules P1 SIU P1 P2 ARC module (APV Readout Controller) Power: 20 WInput supply: V, 6.3 A, Littelfuse 451 series*Materials: FR-4, copper, nickel/gold plating, aluminum, package molding compounds, SnPb solder, ceramicsP1SIUcPCItriggerDAQ fiberPower (local): 24 WInput supply: V (35 W), 10 A, Littelfuse 451 series*Output feed (2x): V, V (5.64 W), remote regulated at +1.8 V, -1.8 V, ground isolatedOutput fusing: On rear transition board at cable connectors. Littelfuse 451 series, on each line.Materials: FR-4, copper, nickel/gold plating, aluminum, package molding compounds, SnPb solder, ferrites, ceramicsARM (APV Readout Module)P1P243(ref. slide 4,7)*Note: 300 A 32 VDC interrupt rating
10 Other electrical equipment Two small blowers to be mounted on west end ring of the STAR magnet, Orion Industries # OAB800AN-11-1B or similarShaded-pole 125 VAC motor, 18 W, will be fused and grounded of courseprobably a flow or pressure sensor to be read out by slow controls (is not an interlock)Gas systemAnticipate a few temperature and pressure sensors to be read out by RS-232 or 20 mA loop, wired with appropriate cable, e.g. 2C 20AWG CMGReadout device in FGT electronics rack, connected to ethernetethernet switch mounted in FGT rack or nearbyoptical fiber patch box (MIC box) in FGT rack for connection to DAQ room, all fibers NEC type OFNRSTAR trigger/clock signal cable to TCD rack (1A1) – Belden # 8166, NEC type CMlaptop computer in FGT rack for local operation of FGT controlsDAQ computer (1) rackmounted in DAQ roomWSC field-shaping bias system (detailed on next slide)
11 WSC field-shaping bias system Glassman EH10N10, -10 kV w/ current limitFixed operating point tbd, expect approximately -5.5 kV“Protection: Automatic current regulation protects the power supply against all overload conditions, including arcs and short circuits. Fuses, surge limiting resistors, and low energy components provide the ultimate protection.Remote Controls: Common, +10 volt reference, interlock, current monitor, current program, voltage monitor, voltage program, HV enable/disable, and ground provided on a rear panel terminal block.External Interlock: Open off, close on.”Becomes a new permit to TPC cathodeReynolds HV cable with series 531 connectors. Rated 10 kV operation, 100% tested to 15 kV, commercially assembled. Length approximately 50 feet, tbd.Mating connector (Reynolds series 531) is an integral bonded part of WSC – TPC mechanical interface structure. Bias voltage runs in from there to shroud electrode on 20kV silicone high voltage wire.