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LHCf Detectors

Arm#1. Arm#2. LHCf Detectors. LHC Ring. ATLAS. Sampling Calorimeter W 44 r.l , 1.6λ I Scintilator x 16 Layers Position Detector Scifi x 4 (Arm#1) Scilicon Tracker x 4(Arm#2) Detector size W90 x D280 x H620. Where we are with Arm1?.

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LHCf Detectors

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  1. Arm#1 Arm#2 LHCf Detectors LHC Ring ATLAS • Sampling Calorimeter • W 44 r.l , 1.6λI • Scintilator x 16 Layers • Position Detector • Scifi x 4 (Arm#1) • Scilicon Tracker x 4(Arm#2) • Detector size • W90 x D280 x H620

  2. Where we are with Arm1? • Arm1 was fully assembled in Japan in July 2006 (scintillators + fibers + Tungsten) and brought to CERN for the Beam Test

  3. Where we are with Arm2? • Plastic scintillators + Light guides + Tungsten: • Production in Japan finished in July 2006 • They were brought in Florence end of July • First Silicon module (Milestone INFN): • Production in Florence finished in July 2006 • Assembly of Arm2 for beam test was done in Florence in August 2006 • Arm2 was brought at CERN for the beam test on August 16, 2006 • To complete Arm2 3 more silicon modules are necessary • We will finish the modules before Christmas • Arm1 and Arm2 are now both in Florence clean rooms • Final integration of Arm2 will be done before March 2007

  4. Florence clean room (thanks to CMS!!!!!)

  5. Pre-calibrations • For all PMTs • PMT gain at "1 MIP" was pre-calibrated by using plastic scintillator with 90Y beta ray. • HV dependence of gain was measured with all PMTs by using N2 laser. • Saturation effect was measured up to 7 TeV gamma shower maximum. • For all Scintillators • The position dependence of light yield was measured to make correction tables • For Scifi & MAPMTs • Gain and photon yield difference of each channel was measured by 12C ion beam.

  6. Light Intensity - ADC Linearity ADC Count 7TeV shower Maximum 7TeV shower Maximum 105 105 5x104 5x104 0 0 Light Intensity [MIPs] Light Intensity [MIPs] Pre-calibrations PMT Linearity checked by N2 Laser. Position dependence of light yield of scintillator

  7. Beam test @ SPS • Arm1 & Arm2 were delivered to Cern on August 16, 2006 • They were set up for the beam test • Beam period: August 28, September 4 • H4 Test Area • Electrons up to 200 GeV • Protons up to 350 GeV • Muons • Goal of the test beam: • Energy calibration of the calorimeter • Measurement of the spatial resolution of silicon system • Florence telescope (ADAMO) is used to precisely reconstruct tracks

  8. LHCf Detector Silicon Tracker Moving Table Trigger Scintillator SPS Beam Test • CERN : SPS T2 H4 • 2006 Aug. 28 – Sep. 4 • Incident Particles • Proton150,350GeV/c • Electron 100,200GeV/c • Muon 150GeV/c • DAQ rate • 1kHz at Arm#1 • ( fast enough for 7 TeV run) Setup

  9. X Y @ 42r.l. @ 30r.l. e- @ 10r.l. @ 6r.l. Event View - electron - 200GeV/c Electron Beam Event @ 40mm Calorimeter. ADC of scintillator Layer 0 - 11 : 2 r.l. step Layer 12 -16 : 4 r.l. step Shower profile re-constructed from ADC of Scifi

  10. Event View - proton - Proton 350GeV/c Incident Position Arm＃1 40mmTower 40mm Calorimeter ADC the Other Event ①6r.l. ②10r.l. ②30r.l. ②42r.l. 40mm shower profile

  11. Status of Analysis • Analysis of H4 beam line test is under going. • Data and MC show reasonable agreement even at very preliminary stage. • Now checking … • energy scale, energy resolution, position dependence, position resolution,particle identification. ADC distribution of third plastic scintillator layer (6r.l.) for 200GeV electron

  12. Few plots of the beam test results for silicon A high energy electron shower seen on x and y silicon X Y <Noise> ~ 5 ADC counts

  13. Y Energy measured 100 GeV electrons High Gain X

  14. Y Energy measured 350 GeV protons High Gain X

  15. Now the integration in LHC… • All the cables have been pulled on both sides • The quartz fibers for calibration have been pulled on both sides • The container for the fibers of Arm2 have been pulled, fibers will be installed later • Installation and commissioning dates have been fixed • LSS1L • Bake-out of the section: December 2006; • BRAN and LHCf commissioning: from 8/01/2007 to 26/01/2007; • BRAN and LHCf final installation: from 14/08/2007 to 17/08/2007. • LSS1R • BRAN and LHCf commissioning: from 23/04/2007 to 11/05/2007; • bake-out of the sectiont= June, July 2007; • BRAN and LHCf LSS1R final installation: from 09/10/2007 to 12/10/2007. • Transport and installation procedure is under detailed study • Thermal tests in the Tan will be done this week with a thermal mockup. • Position of racks in USA15 are defined, racks are allocated, the precise crate allocation in the racks is under study Very big help from TS/LEA group (Anne-Laure Perrot and Daniela Macina)

  16. ARM#1 ARM#2 Arm#1,Arm#2

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