Presentazione sul tema: "IFR LST status Roberto Calabrese Universita’ e INFN, Ferrara Commissione I, 18/5/2004."— Transcript della presentazione:
IFR LST status Roberto Calabrese Universita’ e INFN, Ferrara Commissione I, 18/5/2004
LST Project Overview Barrel RPC’s will be replaced with Limited Streamer Tubes (LST’s) 12 Active Layers, 6 Layers of Brass Absorber Top and Bottom Sectors in Summer ’04 Remaining 4 sectors in Summer ’05 Each Layer consists of 6 to 10 LST Modules Each module contains of 2 or 3 “Tubes”, which are produced are Pol. Hi. Tech. At Princeton and OSU, the tubes are glued onto a “phi- plane” to form modules Strong QC activity in Italy and US Other key systems include Z-planes High Voltage, Gas Readout Electronics
Tube Production at Pol. Hi. Tech. Production rate: 15 tubes/day. 4 BaBar shifters present doing QC Tube Resistivity HV conditioning, plateau test Source scan test Long Term Test
Tube Production Status Latest production report 1145/1350 Tubes produced 552 Tubes shipped (all tubes needed for ’04) Production should finish May 31 Only tubes that condition OK and pass Long Term Test are paid for
Phi Plane Production Phi plane purposes Ground plane Transmit wire signals to forward end Manufactured at SLAC using “Large scale lamination” Production of ~700 planes now completed. Planes shipped to Princeton and OSU for module production
Module Production Tubes shipped to Princeton and also on to OSU for module production. Tubes are re-QC’d before assembly and then again after assembly. Some delay in schedule due to customs problem Now producing 20 modules/week/site Expect first ~80 modules at SLAC in two weeks All modules for ’04 installation should arrive at SLAC on June 15
Module Production QC Plateaux typically 400 Volts Source scan test re-done for every module Evidence so far is that no damage is done by trans- Atlantic shipment Good Scan “Malter” Effect
Tube/Module Production Progress 31 May # modules Needed for 2004 Tube Production at PHT 300 200 100 Module Production at Princeton/OSU (~40/week)
Z-Plane Production Produced using similar lamination technique as for phi-planes. More challenging due to: Large size Soldering of strips to readout cables Z-plane production has begun (3 planes done), should finish planes for ’04 installation in mid-June Tested with production module, signals look good
High Voltage Supply High Voltage system provides a 4 wires for every tube Highest possible granularity allows minimal efficiency loss in case of mis- behaving cells Distribution boxes monitor currents for each individual tube. Powered by external HV supply
Gas Issues Gas used is Ar/Iso/CO2 mix LST performance tends to improve with higher Isobutane concentrations However, must keep gas non-flammable Important to identify non-flammable and design system so that mix stays there
Readout Electronics Signals come directly from modules on twist-n-flat cables – no preamps FEC motherboards carry 4 daughter cards for a total of 64 ch. Custom backplane and Fast Signal Distribution card Full system test at SLAC in mid-April Full set of populated cards at Ferrara this week
Readout System Test Full system test at SLAC in mid-April using: Production LST Module Prototype Z-plane LST FE Card Wire Daughter Card Strip Daughter Card Custom Backplane Fast Signal Distribution Card DAQ Test Stand (formerly used for RPC tests) Excellent S/N and readout works
Installation Issues Many Iron-work operations that have never been done before: Corner plate removal Solenoid support arm removal RPC extraction Full scale mock-up in IR12 to test/practice these operations Extremely tight installation schedule for LST modules Install LST’s during day shift. Hookup and test during evening/owl shift
Dec 15 ’02-- BaBar chooses LST for IFR Upgrade June 12 ‘03 -- EPAC Review Approves LST Proposal June 15 -- Cost/Schedule/WBS prepared June 22 -- INFN Gruppo Uno Evaluation June 27 -- BaBar IFC Approves IFR Upgrade Project June 30 -- Choose Large-Cell Design July 17 -- Electronics Design Review Aug 1 -- Place Orders for Tubes & Small parts Aug 26 -- Q/A Review Aug 27-- Install Test Module in BaBar Sept 3 -- Fire safety approval for tubes, strips, cables) Oct 1 -- Decide to read out Phi via wire signals Oct 22 -- Mechanical, Schedule, & Budget Review Nov 10 -- Tube Production begins! Nov 30 -- Orders placed for components: electronics, crates, HV system, signal cables, HV cables Dec 15 -- plane/Z-strip production begins at SLAC Dec 18-- First shipment (24 tubes) to Princeton/OSU 2003 Milestones successfully passed
2004 Milestones successfully passed Jan 7 -- Q/C systems operational at OSU, Princeton Jan 9-- First module assembled at Princeton Jan 12 -- Presentation to BaBar International Finance Committee Jan 14 -- First module passes Q/C tests Jan 31 -- Prototype FEC tested on wire and strip signals Feb 15 -- First 2 modules shipped to SLAC, one installed in BaBar Feb 17 -- First container (168 tubes) shipped from Italy to Princeton Mar 2 -- Second container (168 tubes incl. layer 18) shipped Mar 3 -- Transition boards for 2 sextants delivered to P’ton &OSU. Mar 29 -- First container of 168 tubes arrives (finally!) Apr 12 -- Second container of 168 tubes arrives in Princeton Apr 5 -- Electronics Readiness Review, system test at SLAC -- First HV Crates to SLAC -- Installation tooling complete -- IFR Test Stand reconstituted in CEH -- Gas system assembled, under test at SLAC May 4 -- 3rd shipment (192 Tubes) [all tubes needed for 2 sextants] May 6 -- Installation Readiness Review
Remaining Milestones May 20 -- ~80 modules to SLAC -- Signal cables delivered -- 4 th shipment (168 Tubes) from PHT -- Complete HV cables for 10 modules at SLAC June 15 -- HV Cables for 2 sextants to SLAC June 8 -- Ship all modules for 2 sextants from OSU and Princeton June 15 -- 5 th, 6 th shipments (168 tubes ea) shipped from PHT -- All HV supplies for 2 sextants to SLAC -- All Modules for 2 sextants arrive at SLAC -- Q/C for all tubes for 2 sextants underway at SLAC June 30 -- All Electronics,crates, backplanes to SLAC July 8-- 7 th, 8 th shipments (168 Tubes) from PHT [Final Shipment] July 15 -- Trigger boards to SLAC Aug 1-- RPC Removal begins Aug 15-- Install First Layer (18 Bottom) Sept 4-- Bottom Sextant Complete Oct 6-- Installation Complete Oct 14-- Detector Closed Oct 15-- Run 5 Begins
Installazione estate 2004 Lavoro preparatorio -Rimozione delle scatole di distribuzione HV Barrel IFR (sestanti 1 e 4) -Rimozione delle Front End Cards Barrel IFR (sestanti 1 e 4) -Rimozione tubi gas, cavi HV, cavi segnale Barrel IFR (sestanti 1 e 4) -Rimozione corner plates della parte forward di Babar Installazione nuovi sistemi (elettronica Front End, HV, gas) -Installazione dei rack che alloggiano l’elettronica di Front End -Installazione dell’elettronica di Front End -Installazione e messa in opera del sistema di alta tensione -Installazione e messa in opera del sistema di distribuzione del gas Rimozione RPC/Installazione LST (sestante 1 e successivamente sestante 4) -Installazione strutture meccaniche di posizionamento -Rimozione 18 strati di RPC -Installazione 6 strati di assorbitore -Installazione 12 strati di LST -Installazione tubi gas, cavi HV, cavi segnale -Rimozione strutture meccaniche di posizionamento
Alcune date rilevanti Inizio shutdown 1 Agosto Inizio rimozione utilities RPC 3 Agosto Inizio rimozione RPC11 Agosto Inizio installazione LST 14 Agosto Fine installazione sestante bottom 4 Settembre Fine installazione sestante top 6 Ottobre Rivelatore chiuso 14 Ottobre
Installation Readiness Review (May 5, 2004) Report of the review committee William Althouse, Gordon Bowden, John Weisend, (David Nelson), Walt Innes (Chair) Executive Summary The LST group is to be commended for the tremendous amount that they have accomplished since the last review. The project as a whole appears in excellent shape and on track for the August installation. The quality of the design and production is very high and we fully expect a successful installation…In case of schedule slip, we suggest this summer’s work be completed even if it takes as much as two weeks longer than planned. The overhead of beginning and stopping an effort such as this admits no other logical choice.
Manpower INFN richiesta Installazione (3 turni, 6 giorni/settimana) 16 m.u. Elettronica di Front End (FEC + crates) 3 m.u. Software (database, DAQ) 1.5 m.u. Commissioning 2 m.u. Totale 22.5 m.u.
Conclusioni Il progetto è in schedula per l’installazione nell’estate 2004, rivelatori ed elettronica funzionano secondo le specifiche di progetto. Intenso periodo di installazione previsto per la prossima estate.