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General Status of the Barrel Muon Alignment Project

General Status of the Barrel Muon Alignment Project. The Barrel muon Alignment Collaboration:. Institute of Nuclear Research, ATOMKI, Debrecen, Hungary European Laboratory for Particle Physics CERN, Geneva, Switzerland Institute of Experimental Physics of Debrecen University,

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General Status of the Barrel Muon Alignment Project

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  1. General Status of the Barrel Muon Alignment Project The Barrel muon Alignment Collaboration: Institute of Nuclear Research, ATOMKI, Debrecen, Hungary European Laboratory for Particle Physics CERN, Geneva, Switzerland Institute of Experimental Physicsof Debrecen University, Debrecen, Hungary Institute for High Energy Physics, Vienna, Austria The work is supported by The Hungarian Scientific Research Fund OTKA T 026178, T034910, T 043145

  2. Introduction For those who are less familiar with the project: Elements of the system: • - Rigid structures (MABs, z-bars) • Video-camera boxes (on the MABs) • LED holders (called forks, on the chambers) • Diagonal and Z LED holders • (on the MABs and z-bars) • - Board computers (one for each MAB)

  3. Rigid structures (MAB, Z-bar) MAB: The tender procedure for the production of the MABs is finished. The manufacturer is the IMMG consortium in collaboration with HELCO (Greece). After the test of the first MAB (prototype) 6 units are to be produced by September 2003 and the rest by March 2004. Z-bar: The design started (H. Gerwig). It is much-much simpler than the MABs.

  4. 22 mm Video-camera box parts Sensor + driver: The assembly of the full quantity (~750 pieces) is ready (Debrecen, Budapest). Lens-part: Lenses are ordered: Chamber and z: f=30mm, diam.=10mm, 600 pieces Diagonal: f=70mm, diam.=12mm, 150 pieces. Total cost: ~22 kCHF. Mechanics (holder) for both: Design to be finalized together with Hubert. Working…. Fabrication is organized (HEPHY, Vienna). Sensor quality control facility (Debrecen): • Under construction. It checks the • Functionality, • Sensitivity of the pixels (average, sigma), • Pixels with significant deviation.

  5. LED holders Fork production: Finished (already last year). Fork calibration (8 Apr 2003): 200 (out of 1050) are calibrated. (See separate talk about the details) Fork delivery schedule: - 120 forks are already at CERN - Next 80 by 15 May 2003 - Next 300 by 15 September 2003 - Last 450 by 15 March 2004 Other LED holders (diagonal, z): under design (H. Gerwig).

  6. Fork installation and chamber calibration The chamber calibration bench is operational and performs well. • The main problems: • handling of the feet • cabling About the details of the first experience see separate talk.

  7. Board computer status Passed a very important milestone: irradiation test (see next slides).

  8. Board computer irradiation test The Svedberg Laboratory (TSL), Uppsala University, Uppsala (Sweden) 11-12 February 2003

  9. PC-104 Proton beam Scintillators for rate measurement video- camera ethernet Board computer irradiation test Experimental setup: Particle: proton+ Beam energy: 95 MeV Beam size at the board computer: about Ø10 cm

  10. Board computer irradiation test Experimental hall The setup Beam pipe

  11. Board computer irradiation test Boardcomputer A. Kerek Royal Inst. of Technology Stockholm D. Novak ATOMKI Debrecen

  12. Board computer irradiation test Expected fluence during 10 LHC years: At the worst region for the muon barrel Neutrons total: ~3x1010 n/cm2 Neutrons > 100 keV: ~6x109 n/cm2 The test to be provided: The proton fluence comparable with the expected neutron fluence for E >100keV should be reached. Proton energy: 60 – 200 MeV. (F. Faccio, M. Huhtinen, 1999)

  13. Board computer irradiation test Measurement, results: 10 years of LHC a) good operation up to the end of the run b) picture recording stopped after the 11-th picture (after 0:02:44) c) picture recording stopped after the 22-th picture (after 0:59:59) d) PC stopped after 1:42:00 (the corresponding file was not found) The board computer worked correctly again after each reboot. There was no stop at low rate beam (runs 7, 8, 9).

  14. Board computer irradiation test The image taken before the irradiation The image taken after the irradiation Conclusion: the tested device can be used for the project.

  15. The main message The last worrying unknowns in the project are answered and all of them in a positive way: • The board computers work in LHC environment • The calibration technology designed for ISR works • The MABs can be built without blowing up our budget.

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