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Low Voltage Power Requirement of TOF FEEs. • Maximum 110 Watts/tray @ 4.8 Volts @ tray. • Low Noise: Periodic and Random Distortion (PARD) < few mVRMS • Floating outputs. • Shielded power cables (optional). • • • • • • • Independent supplies/tray. Regulation: Not critical (linear regulation on FEE cards). Remotely controlled and monitored. Safety: Interlocked and adhere to STAR/BNL safety. Rack mounted Relatively low cost. Good efficiency. Tray Low Voltage System Configuration Wiener MDH + - + sense wire - sense wire To Tray Tray (load) Total of 120 floating outputs arranged in 10 PL512 chassis power cables 2 pairs #10 AWG (4 conductors) (50 mW / parallel pair) < 100 feet + Wiener MDH - + sense wire - sense wire To Tray < 23 Amperes @ 4.8 Volts (110 watts/tray) Tray (load) STAR magnet (ground) LV Electrical Connection Details Assuming 100 feet cable length and 0.1 volt drop in connectors (no other potential drops). (Note: the cables in the system will be variable lengths, and less than 100') Floating power Supply V 7.2 black (hot) crimp lug connector 2 pairs of 10 AWG cable ( Belden 27140A 600 V CEC: FT4 >30 A ) AMP 52042-1 I < 23 A V 6.0 + Tray Vmin 4.8 V Sense Wires white (neutral) V1.2 - green (ground) Shielded twisted pair with drain wire Belden 6500FE (NEC CMP & CEC FT6, 300 Volt, Flamearrest Jacket) = Fast acting fuse (30 A fast blow fuse either panel mounted by factory or in line with power cable) The actual type and specs will be supplied when design is finalized P<110 watts 10K isolation/safety resistor Chassis Interlock and other control signals not shown Chassis and magnet ground are connected via low impedence paths. Magnet Ground LV power Supply Arrangement in the Full size Racks 40 U • Total power dissipated by each tray ~ 110 Watts • Total Power dissipated outside power supply [55 Watts dissipated in each transmission cable] (trays + cables) ~ 165 Watts • Total heat dissipation per output channel (assuming 83% efficiency) ~ 34 Watts • Total Heat Dissipation per power supply mainframe (12 outputs) ~ 408 Watts • Total heat dissipation per full rack (6 x PL508 or PL512) ~ 2.45 KW 1U Empty slot 1U Ethernet Switch 1U Air Intake (empty slot) PL512 3U 1U Air Intake (empty slot) 1U FAN Tray 1U Heat Exchanger 1U Filter 1U Air Intake (empty slot) PL512 3U 1U Air Intake (empty slot) PL512 3U 1U Air Intake (empty slot) 1U FAN Tray 40U 1U Heta Exchanger 1U Filter 1U Air Intake (empty slot) PL512 3U • Available cooling power/rack (3 heat exchangers) ~ 3.6 KW 1U Air Intake PL512 3U 1U Max. input power per PL512 chasis: 3 KW (power factor 0.96; Vmax = 208 V; Imax=15 A) Air Intake PL512 3U 1U 1U 1U http://www.wiener-d.com/products/20/73.html A full rack supplies power to 72 trays Air Intake FAN Tray Heta Exchanger 1U Filter 1U Air Intake (empty slot) 1U Breaker box Comparison of Various Power Supply Choices The estimated costs per channel do not include rack costs (if one includes the additional costs then switching power supply costs are the lowest) 12 supplies/3U >24 racks 9 racks 2 racks Details of Low Voltage Supply Connections Interlocked 208 Volt AC @ 16 Amp. ½ of one + MDH module ½ of one + MDH module - ½ of one + MDH module ½ of one + MDH module Ethernet Control/ monitoring Slow control interface Tray (load) + sense wire - sense wire Tray (load) + sense wire - sense wire STAR magnet (ground) 6 MDH modules/PL512 CAT 5e Belden 1533R (or equivalent) Cable lengths vary: 80’ -100’ Wiener PL512 < 23 Amperes @ 4.8 Volts (110 watts/tray) + sense wire Tray (load) - sense wire + sense wire - sense wire DC power cable 1 pair 10 AWG (0.5 W/1000' ) ~ 80 - 100 feet Wiener PL512 based low voltage power supply system for TINO based TOF FEE. (only one out of 10 units shown) Tray (load) Power Supply Noise Characteristics Load: 100 A @ 5 Volts Comparison of Noise Rates in TOF5: Linear Supply vs. Wiener PL508 TOF System Resolution from Off-Line Analaysis Kepco Linear (red curve) vs. Wiener (blue curve) (March 2005 Cu-Cu) Slow Control for the TOF Low Voltage System Local Ethernet Segment Ethernet Ethernet switch PL512 STAR Slow CTRL Data Stream This figure shows tray power supplies only. There is an additional power supply mainframe for the Start detector FEEs and TDIG boards (and a few spares). 6 PL512 mainframes Block Diagram of TOF Low Voltage Control System 6 PL512 mainframes EPICS Based Slow CTRL TOF High Voltage System Requirements. • High Voltage to provide symmetric HV up to +/- 7.5 KV @ few uA/tray (this current takes into account Beam on condition scaled to RHIC upgrade luminosities). • Remote programability/monitoring: Voltage, current limits, ramping rates, voltage and current monitoring (10 nA resolution). • Isolation: power supply outputs must be floating. Furthermore, since one set of plus and minus outputs supply current for up to 10 trays tray inputs are isolated from other trauys to avoid interference. • HV will be interfaced to STAR interlock system. • Remote control software will be based on EPICS (or LabView) and will be interfaced to STAR controls (logging and alarms). Choice of HV Power Supply. • CAEN SY127 mainframe with A631 pods has been used to supply HV to MRPCs (some problems have been encountered during last two runs - failed A631 modules). • Each SY127 accommodates 10 A631 pods. Each A631 pod (negative and positive output versions available) supplies 4 independent floating channels. Each output could supply up to 8 KV at 100 uA. (One fully equipped SY127 would serve the entire TOF system). Output current limited internally and also by external limiting resistors located @ distribution boxes. • Distribution boxes located on the magnet will fan out each pair of + and – HV to up to 10 trays. These boxes will supply required isolation, filtering, current limiting and grounding of the HV (see figure on the next page). • CPE Italia SPA (rated ~20 KV) cables (HV RG-58) will be used for HV distribution. These cables have been flame tested by Phenix Collaboration. • Kings (or Reynolds equivalent) ) 1065 series 10 KV (DC tested to 25 KV) will be used to interface the HV to power supplies, distribution boxes, and the trays. (The new Reynolds equivalent connectors are rated at 15 KV @ approximately the same cost). • Remote control and monitoring of the SY127 will be done through CAENET (PC based A1303 PCI-HS CAENET controller already used to control HV system in the past few years). High Voltage System CAEN SY127 HV Supply Chassis [one of two required units shown] Interlock High Voltage Distribution Box (1 of 12 units shown) I max 100 A Only one pair of total of 10 pairs shown I typ 1 A “small value” tray ground isolation resistors (optional) Neg. Ch, 1 HV Coax Cable Positive HV Coax Cable Magnet Ground To one TOF tray Pos. Ch. 1 HV Coax Cable 6 cables 3 A631N, -8KV modules (including spares) 12 indep., floating channels Up to 100 uA per channel CPE Italia, HV RG-58 coax cable + SHV connector at PS end + Kings 1064-1 & 1065-1, 10 KV connectors at distribution box end and between distribution box-tray. Neg. Ch. 6 6 cables CAEN NET bus 3 A631P, +8KV modules (including spares) 12 indep., floating channels Up to 100 uA per channel Protection enclosure (SHV connectors used require protection against HV shock hazard) I max 100 A Pos. Ch, 6 Current limiting and filtering HV resistors (10 M) Negative HV Coax Cable LabView GUI for SMD TCP/IP-based HV Control Program for CAEN SY1527 Mainframe Developed by UCLA. Arrangement of Supplies in Half Height Racks. 25 U 25 U 2U Empty slot 3U 25 U Empty slot 4U 3U 1U Fan Tray 1U Heat Exchanger 1U Air Filter 1U Air Intake (panel only) 5U 4U 1U Air Intake (panel only) 3U 5U 1U Air Intake (panel only) 1U Fan Tray 1U Heat Exchanger 1U Air Filter 1U Air Intake (empty slot) 25 U 25 U 1U 3U 1U 25 U 4U Air Intake (panel only) Air Intake (empty slot) 5U 4U 3U 1U Fan Tray 1U Fan Tray 1U Fan Tray 1U Heat Exchanger 1U Heat Exchanger 1U Heat Exchanger 1U Air Filter 1U Air Filter 1U Air Filter 1U Air Intake (empty slot) 1U Air Intake (empty slot) 1U Air Intake (empty slot) 1U Interlock/Com. Unit 1U Interlock/Com. Unit 1U Interlock/Com. Unit Linear Regulated Supplies Ferroresonant power supply Wiener power supply Total of 30 racks required Total of 8 racks required Total of 3 racks required