LHCf Detectors 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 Arm#1Arm#2 LHC Ring ATLAS

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

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 Where we are with Arm2?

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

Pre-calibrations For all PMTs –PMT gain at "1 MIP" was pre-calibrated by using plastic scintillator with 90 Y 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 12 C ion beam.

Pre-calibrations Position dependence of light yield of scintillator x x10 4 Light Intensity [MIPs] ADC Count 7TeV shower Maximum 7TeV shower Maximum Linearity Light Intensity - ADC PMT Linearity checked by N2 Laser.

Beam 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

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

Event View - electron r.l. e-e- Shower profile re-constructed from ADC of Scifi 200GeV/c Electron Beam 40mm Calorimeter. ADC of scintillator Layer : 2 r.l. step Layer : 4 r.l. step

Event View - proton - Proton 350GeV/c 40mm Calorimeter ADC 40mm shower profile ① 6r.l. ② 10r.l. ② 30r.l. ② 42r.l. Incident Position Arm ＃ 1 40mmTower the Other Event

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

Few plots of the beam test results for silicon A high energy electron shower seen on x and y silicon ~ 5 ADC counts XY

Energy measured 100 GeV electrons High Gain X Y

Energy measured 350 GeV protons High Gain X Y

Now the integration in LHC… 1.All the cables have been pulled on both sides 2.The quartz fibers for calibration have been pulled on both sides 3.The container for the fibers of Arm2 have been pulled, fibers will be installed later 4.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/ Transport and installation procedure is under detailed study 6.Thermal tests in the Tan will be done this week with a thermal mockup. 7.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)

Arm#1,Arm#2 ARM#1 ARM#2