11.06.15 HV-system Oleg Maev 1. Brief overview of HV-systems Muon chambers circuits 2. States of HV according LHC/LHCb conditions 3. Useful practical applications/knowleges/tools.

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Presentation transcript:

HV-system Oleg Maev 1. Brief overview of HV-systems Muon chambers circuits 2. States of HV according LHC/LHCb conditions 3. Useful practical applications/knowleges/tools Piquet training

GEM HV-system Oleg Maev Power Supply designed and realized at INFN, Frascati specifically for LHCb MUON GEM-detectors. Provides Gas gain (GG) in 12 GEM-chambers in M1R1. Each chamber consists of two triple-GEMs detectors. Gas mixture - Ar/CO2/CF4 (45 : 15 : 40) Gain ~4300 at HV 3x415V Safety limit on current - 8muA  PS Placed in D3 Rack D3A05 Details on PS see on 2

Oleg Maev 3

GEM HV-system Oleg Maev 2012 Conditions - L~4x10 32 cm -2 s -1 4

CAEN HV-system Oleg Maev Commercial one. Consists of: SY1527 Mainframe with A1676A controllers A V PS “CARBON” 48V service module home made D3 Rack D3A05 D3 Rack D3A06 EASY 3000 crate with A3535P 32 chs PS board D3 CAVERN 5

CAEN HV-system Oleg Maev Provides GG in 264 two-gaps MWPCs on M1 in regions R2-R4, 528 HV-channels, and in 144 four-gaps MWPCs in regions R1- R2 on M2-M5 stations, 576 HV-channels HV-channels in total. Gas mixture - Ar/CO2/CF4 (40 : 55 : 5) Gas Gain ~ at HV V 6

PNPI HV-system Oleg Maev Distributes HV from primary PS with two-level linear regulators Designed and realized at PNPI together with Florida University specifically for LHCb and CMS MUON MWPCs. MATSUSADA PS Commercial one RDBs – 2 nd level of distributers HVM-module (MSU) USB-interface Master modules: 1 st level of distributers RACK D3A06 CAVERN Matsusada-control 7

PNPI HV-system Oleg Maev Provides GG in 960 four-gaps MWPCs in regions R3-R4 on M2- M5 stations, 3840 HV-channels. Just keep in mind: OFF on 2 nd level RDBs doesn’t mean HV=0 It always propagates ~ 1000V from 1 st level (Masters) To get HV=0 you should switch OFF Masters 8

HV-system. ECS Oleg Maev HV systemWINCC - projectHost (Linux) Virtual machine DriverRunning on (Windows CCPC) GEMMUHVGEMmuhvgem01OPCmucc0503w CAEN A-sideMUHVA02muhva02OPCmucc0301w CAEN C-sideMUHVC02muhvc02OPCmucc0302w PNPI A-sideMUHVA01muhva01DIMmucc0801w PNPI C-sideMUHVC01muhvc01DIMmucc0802w Cold start and details on TWIKI (in progress): 9

HV-system. ECS Oleg Maev OFFSTANDBY1STANDBY2READYNOT_READYTRIP HV states: FSM (WINCC) status: DEADREADYNOT_READYERROR Some important details on TRIP ( I>thr. during 1s): GEM – never tripped (protective resistor) – reduce the HV CAEN – normal trip (HV->OFF) PNPI – trip only in the case of short or something serious (procedure for SOFT_TRIP implemented – reduce the HV) 10

HV Monitor Oleg Maev 11

HV Monitor Oleg Maev Control from MUSIDES 12

HV Monitor Oleg Maev Also with this Monitor you may operate with PSs, see status of the servers, Gas and also run the Gaps Check Script which is limited by 20 tripps and needs to be periodically rerun. This script makes tripped gap disabled, writes log entry, sends SMS to Piquet phone and produces the voice message in CR. Very useful tool. 13

HV Monitor Oleg Maev With left click you may open any chamber: 14

HV Monitor Oleg Maev And reach some subsystems with following trick: 15

GEM Current Monitor Oleg Maev 16

Side HV-panel – Main (CAEN) project Oleg Maev 17