Stato progetto RPC A Colaleo INFN BARI Sommario
Stato progetto RPC A. Colaleo –INFN BARI Sommario Stato produzione Stato installazione e commissioning RPC nell’MTCC Phase 1 Phase 2 Attivita’ dopo l’MTCC Stato cablaggio Stato sistema monitoring del gas Stato dell’elettronica A. Colaleo 1
Single & Double Gap Production ü Produzione Single Gap completata: circa 3000 single gap prodotte e testate 16. 5 % of rejection ü Double Gap production completed A. Colaleo Prodotte Accettate Scartate 1200 1144 56 (4. 7 %) 2
Chamber Production ü Chamber production: 448/480 chambers have been accepted at test sites Bari – Pavia – Sofia Ø To finish production: 10 Chambers under test in Bari ready by the end of September 22 Chambers in construction at General Tecnica 6 needed for next installation ready by the end of October A. Colaleo 3
Barrel Commissiong camere all’ISR Final dressing • Final cooling, HV connectors, temperature sensors Detector control • Gas leak • Threshold setting and reading • Current vs. HV • Long stability test (15 -20 days @ 9200 V) Performance • Single rate (hits count. ) vs. HV • Noise rate (cluster count. ) vs. HV • Cluster size vs. HV A. Colaleo 416 chambers already accepted through the ISR pipeline 24 chambers under test – foreseen ready first week october 8 chambers to be tested – foreseen ready end october 4
Barrel Commissiong camere all’ISR 420 camere sono state testate 4 di queste ancora sotto test di stabilita’ in corrente A. Colaleo 5
Installazione Wheels+1/W+2/W 0 installate eccetto settori 1 -7 W-1, W-2 installati settori 10, 11 + alcune MB 4 Settori 1 -7 installati underground A. Colaleo 6
Coupling Test prima e dopo installazione Dopo l’accoppiamento all’ISR e prima dell’installazione a SX 5: controlli di perdita di gas, intergrita’ HV, controllo di connettivita’ delle strip e sistema controllo soglie schede FE, controllo sistema cooling (RPC/DT/MC) Dopo l’installazione : Connessione cavi di grounding Gas system test: • Connessione al distributore di gas e calibrazione flow cells • Controllo perdite gas • Equalizzazione dei flussi nella A. Colaleo stazione 7
Barrel Commissioning camere installate For each sector • HV/LV test • Noise • Current stability for 48 hours Wheel +1 • All basic test done • Chamber sect 5/RB 2 replaced due to broken HV cable • 1 FEB connector replaced in sect 9/RB 1 • 1 HV connector replaced on sect 12/RB 3 Wheel +2 • All basic test done • Chamber sect 12/RB 3 replaced due to gas leak • 3 Distribution Board replaced on sect 9/4 RB 1 chambers (wrong threshold control via DT MC (backup line)). A. Colaleo • 1 FB replaced in sect 9 /RB 2. Wheel 0/-1/-2 ( 12 sectors) • Basic test done in all sector of W 0, excluded sect 4 -5 • Broken HV connector in W 0 sect 8 RB 2 • Discharging HV connector in W 0 sect 6 RB 2 • Gas rack for W-1, W-2 to be commissioned 8
Barrel Commissioning camere installate Current HV 9200 V < 1. 5 micro. A Noise rate HV 9200 V Hz/strip Strip = 420 cm 2 < 0. 25 Hz/cm 2 A. Colaleo CERN 22 June 2006, CMS Plenary 9 CMS RPC Collaboration
SX 5 planning after the field mapping A. Benvenuti A. Colaleo W. Van Doninck 10
Status Attivita’ a SX 5 dopo MTCC II Detector installation • YB-1: 24 DT - 48 RPC - QUASI TUTTE GIA’ ACCOPPIATE • Large MB 4 : 8 Chambers - 16 RPC • YB-2: 26 Chambers - 52 RPC • YB 0 feet: 2 Chambers - 2 RPC • UX YB+2, YB+1: 16 Chambers - 32 RPC 150 RPC da installare • DT+RPC coupling must proceed at 3 chambers/day in order to match the installation rate during the first 3 weeks • UX installation rate of 2 chambers/day assumed for YB+2 and of 3 for YB+1 A. Colaleo 11
Attivita’ a SX 5 dopo MTCC II Detector commissioning W 0 sector 4 -5 SX 5 W-1, W-2 all sectors UX W+1 , W+2 sect 1 -7 Gas system Gas distributor commissioning on W-1, W-2 Cabling W 0 cabling Electronics Installation of LV boards in W+1 and W+2 Installation of Linkboard on W+1 and W+2 Functionality test of full link system A. Colaleo 12
MTCC Test the full chamber/electronics/DAQ/Software chain and trigger system I 2 C FEB rs be am C RP Ch FEB CB Slave LB Master SU LB Coder SU Slave LB RBC Coder SU Coder On Tower YB+1 S 10: LBB with 15 LBs and RBC 1 YB+2 S 10: LBB with 15 LBs, S 11: LBB with 3 LBs and RBC 2 A. Colaleo RBC Trigger Board PAC PAC GB & Sorter LVDS signal TC Backplane L T C RMB Data Concentrator Card Filter Farm Phase 2 Control Room Trigger Crate with the 1 Trigger Board with: 14 optical links from LBs, Stratix 2 PAC mezzanine board, Control Crate with CSC 13 TTC crate with LTC, TTCci and TTCex
RPC triggers al MTCC RBC • • Separate triggers (LVDS signals) for each wheel to LTC Patterns based on OR of all strips of one eta partition (roll) of one chamber (i. e. one LB) calculated by each LB, no patterns crossing 2 wheels, Each chamber can be masked or forced, RBC 1 W+1: Sect. 10 Configurable majority level, usually we used: – 5/6 - trigger rate ~30 Hz per wheel W+2: Sect. 10 RBC 2 – 6/6 - trigger rate ~14 Hz per wheel Sect. 11 OR Sect. 10 -11 patterns TB • • • patterns for the endcap and W+2 Sector 10 only: majority level 4/6 final geometry straight patterns on single strips for the tower 2 (W+1) (majority level 4/6) "pointing to the tracker": based on OR of all strips of one eta partition (roll) of one chamber, majority level 5/6, the 6 th layer - RB 4 (only middle strips) is required A. Colaleo TB and RBCs triggers were well synchronized to each other 14
RPC al MTCC: servizi Gas Minor problems with the gas distribution. A faulty IR analyzer was often producing false alarms. Optimize gas bottle replacement. Equalization of the gas flow among the different stations has been proved to be possible and no variation observed in B-Fied Interlock system is working (CAEN ) Gas system control information not available in Control Room. Operation in open loop. Cooling Some of the chamber at T > 24 C° for few days. Very important to have stable and low temperature. Wheel W+2 at higher temperature with respect to W+1. To be understood. A. Colaleo 15
MTCC: LV/HV/FEB HV/LV LV stable system. Noise induced by the system on the detector is extremely low ( peak to peak ripple about 30 m. Volts). An unexpected instability of the current readout was found, not previously detected in the lab tests (B field or ADC instability? ). CAEN at work Only a couple of faulty connectors on the multi-polar HV cable on the patch panel side. No faulty FEB. Threshold control to be improved to have the possibility of addressing a single board. A. Colaleo 16
MTCC: DCS and DSS The final state machine works very well. System run smoothly reading 300 hardware channels. No problems found. The present DCS server was appropriate to deal with the existing hardware. DSS: wrong gas mixture signal to DSS implemented for MTCC phase 2 problem in cooling circuit (low flow or high temperature) to be implemented in A. Colaleo phase 2 17
MTCC: Iguana Event Display RPC detector data were read out locally with Trigger. Board PAC diagnostic readout and offline converted to common data format of global DAQ standard CMSSW tools for unpacking and DQM used DT global (4 stations) and Barrel RPC local data (6 layers) merged offline Black = DT hits Green = RPC hits Combined offline RPC (green) and DT digis A. Colaleo 18
Analisi preliminare: DQM Occupancy, noise, cluster size, noise maps. Refine threshold values. DT/RPC reconstruction tools needed. A. Colaleo 19
Efficiency plateau RBC 1 and RBC 2 triggers vs. variation of the RPCs HV set points 6/6 - trigger rate ~14 Hz per wheel A. Colaleo 20
MTCC II plans Phase 2 will allow the RPC to run closely to the final configuration • Complete trigger chain: LB → TB → HSB → FSB → GMT • Final geometry – pointing to the vertex: w a 3 Sectors × 7 Towers s r a 2 Trigger Crates × 2 TBs × 3(4) PACs W Final PAC and Ghost Buster and Sorter algorithms can be tested, no special firmware needed! • PAC patterns – final patterns (vertex muons), but wider i. e. defined on 4 or 8 strips (to have better acceptance) • Normal DAQ: 4 RMB mezzanines + DCC A. Colaleo 21
RPC cable status • • Cable detector – rack installation status: • W+2 and W+1 cabling completed (40 % of the cables on detector) Cables detector – rack for W 0 produced to be tested Ready end of October LB crates installed and backplane cabled on both wheels (except X 3 and X 4 near) A. Colaleo 22
RPC cable status A. Colaleo 23
Work in progress -Production and installation of W 0, W-1, W-2 -Routing of the long cables between detector hall and electronic house - patch panel organisation - production of cables not on detector A. Colaleo 24
GAS monitoring • Gas gain monitoring system – Sviluppo del conceptual design, approvato CSN 1 maggio 2006 e parzialmente finanziato, – Studio dei flussi di gas all’interno di RPC gaps tramite simulazione CFD volta a verificare il lavaggio efficace delle camere e l’eventuale ristagno di contaminanti – – • Analisi SEM-EDS e diffrattometriche (c/o laboratori di Ingegneria Roma 1) su camere irraggiate alla GIF nel 2001, Studio di differenti sistemi di analisi gas: ph-metri, µGC analysis , F- specific eletrode Caratterizzazione del sistema di ricircolo del gas “Closed Loop” – Campagna di misure sistematiche per la caratterizzazione chimica dei filtri impiegati A. Colaleo 25
Gas Gain Monitor (conceptual design) Monitoring continuo del punto di lavoro (efficienza, carica) con cosmici nel gas building su 3 sottosistemi di RPC pads 50 cmx 50 cm nello stesso telescopio 1. REFERENCE con gas clean open-loop 2. MONITOR “OUT” con gas closed-loop dopo CMS-RPC 3. MONITOR “IN” con gas closed-loop dopo purifiers e prima di CMS RPC TRIG 1 RPC TRIG 2 Slow Ctrl GC, p/T/RH/Ph PURIFIERS RPC PAD MON 4 RPC PAD MON 5 RPC PAD MON 6 REFERENCE RPC PAD REF 1 RPC PAD REF 2 A. Colaleo VENT MONITOR RPC PAD MON 1 RPC PAD MON 2 RPC PAD MON 3 H 2 F 4/SF 6 /i-C 4 H 10 /H 2 O • SGX Bldg RPC TRIG 3 RPC TRIG 4 VENT UXC 5 CMS USC 5 MPX half wheel lines VENT Studi di fattibilita’ con su RPC recuperati e sviluppo 26 elettronica ad hoc a Frascati.
Studio del sistema di Closed Loop • In operazione da Sept. 05 sul circuito di gas dell’ ISR – circa 110 l/h flusso totale – 30 linee – ma generalmente ~10 Ch. connessi – Percentuale di miscela fresca : 10% (RH 40%) Da molti studi del sistema risulta che funziona correttamente per circa 20 giorni dopodiche’ si osserva innalzamento delle correnti in alcune camere. Le correnti tornano nei valori normali in seguito alla rigenerazione dei filtri Sono in corso campagne di misure sistematiche su campioni di filtri con metodi chimici, SEM/EDS e diffrattometrici. Studio del sistema di closed loop e’ cruciale per una operazione sicura degli RPC A. Colaleo 27 nell’esperimento: importante realizzare un test esaustivo all’ISR e alla GIF dopo installazione camere (Primavera 07)
Progetto RPC Technical Trigger Wheel-Based Cosmic Trigger • Receive optical link from RBCs • Combine ORs from 1 Wheel and produce Wheel Cosmic Trigger Global Trigger as Technical Trigger The required functions are performed by the RPC Trigger Board (Warsaw): 3 TB for full the barrel LBBox RBC LBBox Barrel Wheel RBC LBBox RBC 6 Fibers/wheel LBBox RBC (RPC Balcony Collector) Wheel Trigger TTU LBBox TTU RBC USC area TTU RBC Fiber GLOBAL TRIGGER UXC area TTU LBBox Technical Trigger Unit The full RBC production is expected to be available before the end of 2006 The. A. Colaleo design of the new firmware and the backplane for the Trigger Board-TTU will start in few weeks 28
Progetto SORTER RPC Trigger Electronics System (general view) A. Colaleo 29
Progetto SORTER Sorter Crate layout Half detector Sorter 2 Half detector Sorter 1 Final Sorter Board Endcaps Outputs Input from Trigger Crate Barrel Outputs A. Colaleo Un crate completo e' stato prodotto, testato al 904 ed installato Un backplane ed un Full sorter spare sono gia' stati prodotti e sono da testare, mentre sono in produzione due half-sorter spare. Algorimi del Sorter saranno testati al MTCC fase 2 30
Conclusioni • Produzione e test delle camere in Italia termina in Ottobre • Test al CERN procedono a ritmo sostenuto : 412 camere testate, 32 camere ancora da testare per la prossima installazione. • Intensa attivita’ di accoppiamento/installazione e commissioning prevista per fine anno. Importante effettuare test dell’elettronica (Link system) in superficie • MTCC costituisce un importante test di tutta la catena di trigger/DCS e di lettura del rivelatore: differenti tipi di trigger sono stati implementati con il sistema RPC durante il test. Intensa attivita’ di software sull’DQM /event display per garantire una immediata interpretazione dei dati. • Sviluppo del sistema di gas monitoring e comprensione sistema di ricircolo sono fondamentali per garantire le prestazioni delle camere nel tempo. • Cablaggio 40 % dei cavi installati. Progressi nell’integrazione dei cavi con il resto del sistema e degli altri rivelatori • Iniziata la produzione e test dell’elettronica per RBC/TTU e Sorter. A. Colaleo 31
Chamber Production per type A. Colaleo CH type RB 1 RB 2/4 RB 3 All Built 132 262 131 525 Rejected 19 (14. 4 %) 30 (11. 5 %) 18 (13. 7%) 67 (13 %) 32
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