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T. Ferguson

Colliding Beams Group Involvement In CMS (see also M. Paulini’s talk on the Counter Group’s CMS Work). T. Ferguson. Outline. Personnel CMS Detector and Endcap Muon System Installation Work Software/Analysis Work Database Work Future Plans. CMU Faculty.

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T. Ferguson

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  1. Colliding Beams Group InvolvementIn CMS(see also M. Paulini’s talk on the Counter Group’s CMS Work) T. Ferguson DOE Review August 29, 2007

  2. Outline • Personnel • CMS Detector and Endcap Muon System • Installation Work • Software/Analysis Work • Database Work • Future Plans DOE Review August 29, 2007

  3. CMU Faculty • T. Ferguson – spends about 90% of time on CMS. • Have been US Endcap Muon Institution Board Chairman for the last 8 years. • H. Vogel and R. Briere – spend only about 5% of time on CMS. Mostly CLEO. DOE Review August 29, 2007

  4. Research Scientists 1) Nikolai Terentiev (8/98 – present) Previously a senior PNPI physicist - had worked at Fermilab for over 15 years. Works 100% on CMS. Our contact person at Fermilab. Does analysis of calibration and test beam data, and software development. 2) Igor Vorobiev (4/00 – present) Previously a senior physicist with ITEP/Moscow working on L3. Works 100% on CMS. Our contact person at CERN. Expert on Databases. Has set-up and maintains 6 different databases for the CMS Endcap Muon system. Also on the overall CMS Database Advisory Committee DOE Review August 29, 2007

  5. Graduate Students • Ryan Carroll – Third-year student. Has finished all his classes and passed his qualifying exams. Will be moving to CERN this fall. • Bora Akgun – Third-year student. Transferred from the Univ. of Pittsburgh. Needs one more semester of courses and to pass a qualifying exam in January. Will move to CERN after that. Both students spent the summer 2007 at CERN working on the installation of the CMS detector. DOE Review August 29, 2007

  6. CMS Detector DOE Review August 29, 2007

  7. CMS Endcap Muon System Schematic of one endcap muon disk, showing the 4 layers of chambers. DOE Review August 29, 2007

  8. CMS Endcap Muon System • 396 Cathode Strip Chambers (CSCs) • 144 Large CSCs (3.4x1.5 m2): • 72 ME2/2 chambers • 72 ME3/2 chambers • 144 Small CSCs (1.8x1.1 m2): • 72 ME1/2 chambers • 72 ME1/3 chambers • 108 20o CSCs (1.9x1.5 m2): • 36 ME2/1 chambers • 36 ME3/1 chambers • 36 ME4/1 chambers • Front-end Electronics: • 200k Cathode channels • 160k Anode channels DOE Review August 29, 2007

  9. Endcap Muon Electronics DDU Board (Ohio State) Trig Motherboard (UCLA) Clock Control Board (Rice) DAQ Motherboard (Ohio State) C C B D M B T M B D M B T M B D M B T M B D M B T M B D M B T M B M P C T M B D M B T M B D M B T M B D M B T M B D M B C O N T R O L L E R Slow Control (Ohio State, UCR) Custom Backplane (Florida) FED Crate in XSC55 • Cathode Front-end Board(Ohio State) • PA/SH ASIC (Ohio State) • SCA ASIC (UC Davis) • Comparator ASIC (UCLA/CERN) CFEB CFEB CFEB CFEB CFEB 1 of 2 1 of 24 LV Dist Board (Wisc, UCD) ALCT Anode LCT Board (UCLA, CMU/PNPI) LVDB Anode Front-end Board (CMU/PNPI) CSC DOE Review August 29, 2007

  10. All Endcap Muon Chambers Installed DOE Review August 29, 2007

  11. Summary Table of Problems - Must be repaired - Can be ignored - Can be fix, but needs board replacement or taking a chamber down DOE Review August 29, 2007

  12. Completed ME-1 Disk DOE Review August 29, 2007

  13. Layout for Magnet Test and Cosmic Challenge (MTCC) ~2/9 of HB (~280°) 2 ECAL (~40°) ~1/24 of HE (~30°) MTCC #1 only MTCC #1 and #2 ~1/12 of CSCs (~60°) µ ~1/20 of DT (~60°) Tracker (~1%) DOE Review August 29, 2007

  14. Summary of MTCC Running July – October 2006 • Stable Operation • 24/7 shift crew operation • Large amount of cosmic events recorded for various B-field settings • Muon Endcap actively participated both in the trigger and data readout Accumulated Events per Trigger Cocktail Accumulated CSC/DT triggered Events per B-field Summary of triggers collected per B-field DOE Review August 29, 2007

  15. MTCC Online Event Display CSC/DT–GMT–GT trigger integration, with Global DAQ readout CSC–CSC/TF–GMT–GT triggered event Run 4593#52618 Ilaria Segoni, Dan Holmes, et al. CSC+DT triggered event (using GMT+GT) DOE Review August 29, 2007

  16. Lowering of Endcap Disks and Central Barrel into Pit, Nov. 06 – Feb. 07

  17. Good Publicity for Endcap Muon System DOE Review August 29, 2007

  18. CMS Schedule (fall & winter) • October ‘07 • Tracker will be inserted • tables on both ends of vac tank, no access for + endcap • November, December ‘07 • Lower the 3 - endcap disks into pit • January ‘08 • Beam pipe insertion - will need to move endcap disks back and forth • Access for installing mini-cable chains and pipes/cables may be poor • February ‘08 • Install pixel barrel and forward detectors DOE Review August 29, 2007

  19. Work of Nikolai Terentiev • Wrote complete package for validating the simulation of hits in all 3 types of CMS muon chambers – CSCs, DTs and RPCs. • Improved the CSC raw-data digitization code to include read-out and unpacking error codes – first CMS subdetector to do this. • Did gas gain stability study of CSCs to measure their stability. • Compared measured chamber parameters between the MTCC and FAST site tests to check for stability and for any problems with the MTCC tests. • Measured time offsets for anode electronics – needed for accurately tagging of correct beam crossing. • Worked on automating and analyzing the anode electronics calibration programs. DOE Review August 29, 2007

  20. CSC Gas Gain Stability in MTCC • Monitoring CSC gas gain. • Mean ADC Sum(i) – Mean ADC Sum(Ref) vs days in MTCC1 and MTCC2 for ME+2/2/32 as 3D plot (color represents the bin occupancy in Z). DOE Review August 29, 2007

  21. CSC Gas Gain Stability in MTCC • Monitoring CSC gas gain (cont’d). • Ratio R=(Mean ADCSum(i)) / (Mean ADCSum(Ref)) for all gas gain locations in all CSCs in all MTCC data. Note: RMS = 0.08 and MEAN = 1.04. • Equivalent Delta(HV) distribution. Note: RMS~14 V (~0.4% of HV setting of 3600 V). DOE Review August 29, 2007

  22. Comparison of Gas Gain in MTCC and FAST Site Tests • Relative gas gain spread in MTCC and FAST. • Instead of direct comparison of the gas gains use gas gain spread defined relatively to the average per CSC. • For each gas location in all CSC find voltage offset equalizing gas gain in CSC: • Delta(HV) = -190 * ln(R) where R=(Landau peak(i)) / (Average Landau peak). • Good correlation between MTCC and FAST site tests. MEAN ~ 1 V, RMS ~ 25V for difference in Delta(HV). DOE Review August 29, 2007

  23. Anode Timing Distributions • Probability to get all 6 anode hits within a certain number of 25 ns beam crossings. DOE Review August 29, 2007

  24. Anode Timing Resolution DOE Review August 29, 2007

  25. I. Vorobiev Database Work 1. I. Vorobiev is a leader in CMS database work. He is the only real database person in the endcap muon group. 2. Set up web sites for CERN chamber tests and test beam runs. 3. Set up endcap muon construction database with all cables, chamber and electronics information in it. 4. Wrote Test Beam database with all run conditions and chamber configurations in it. 5. Set up Equipment Management database which will contain information on entire CMS detector – for French nuclear authorities. 6. Now setting up conditions database, which will contain all information needed for running the detector. Testing it using slice test running. 7. Also writing a configuration database, which will contain all data describing the set-up of the detector elements for each run. DOE Review August 29, 2007

  26. CSC Databases • Conditions • Calibrations and Tests • Detector Control System (DCS) information, Alignment • Configuration • Mapping • Detector Description (CMS) • Equipment Management (EMDB) (CMS) • Construction databases • FAST Site Databases • Electronic Board Inventory • CSC Tracking • Equipment Production DBs (AFEB, ALCT, TMB, RAT, HV) DOE Review August 29, 2007

  27. Database Web Page http://cmsdoc.cern.ch/CSC/CERN/db.html EMU/CSC DOE Review August 29, 2007

  28. Dataflow of Non-Event Data ORCON (Point 5) ORCOFF (CERN) T0 T1 T2 (From Frank Glege) DOE Review August 29, 2007

  29. Configuration and Conditions Data • Configuration dataare data needed to bring the detector into any running mode, e.g., HV settings for power supplies and programmable parameters for front-end electronics. Configuration data require version and tag as meta-data (data that describes the data). Database set-up is under the control of the individual sub-detectors. • Conditions datahave 2 main uses: 1) Post-mortem analysis of detector conditions (online); 2) Event reconstruction and data quality monitoring (offline). Offline conditions are a subset of online conditions. Conditions data require interval of validitiy (IOV), version, and tag as meta-data.Database set-up is under the control of the individual sub-detectors. DOE Review August 29, 2007

  30. Configuration Database Schema DOE Review August 29, 2007

  31. Configuration Database Web Interface DOE Review August 29, 2007

  32. Conditions Database To store information on calibration and electronics performance monitoring. AFEB - 14 tests, 18 numbers per channel + 12 per board. CFEB – 18 tests, (96+32) numbers per channel + 75 per chamber. ALCT – 4 tests, 384 numbers + 160 bytes per board. TMB – 4 tests, 960 numbers + 188 bytes per board. Calibration objects are transferred from Online to Offline to be used in reconstruction. DOE Review August 29, 2007

  33. Mapping Database Conversion of electronic addresses in peripheral crates to chamber addresses and vice versa. DOE Review August 29, 2007

  34. Future Plans 1) Continue work on calibration programs and online monitoring of anode electronics for actual running. 2) Continue work on writing CMS reconstruction software. 3) Continue analyzing MTCC data (N. Terentiev was at CERN for 2 months this summer). 4) Complete databases needed for configuring detector and saving running conditions. 5) Get new graduate students started on CMS software and analysis. Both have taken introductory courses at FNAL. 6) Continue helping with the installation and commissioning of the endcap muon system in preparation for the first collisions in June 2008. DOE Review August 29, 2007

  35. Request for Additional CMS Post-doc Position • CLEO data-taking will finish in March 2008. Present CLEO post-doc will finish soon after that. • This is a crucial time for CMS experiment. Estimate is that the Endcap Muon system needs about 20 FTEs more. • With 2 graduate students stationed at CERN, we need another permanent person there to help supervise them when their advisor is not there. • We request short-term funds to hire an additional CMS post-doc until the present CLEO post-doc finishes. DOE Review August 29, 2007

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