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EMR Status

EMR Status. Jean-Sebastien Graulich, Geneva. Introduction News Detector Design Simulations Responsibilities Plan. Introduction. e +. µ +. EMR: Electron Muon Ranger Aka EMCal/SW See my presentation at CM23 for general introduction

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EMR Status

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  1. EMR Status Jean-Sebastien Graulich, Geneva • Introduction • News • Detector Design • Simulations • Responsibilities • Plan Jean-Sebastien Graulich

  2. Introduction e+ µ+ • EMR: Electron Muon Ranger • Aka EMCal/SW • See my presentation at CM23 for general introduction • http://mice.iit.edu/cm/cm23/agenda/cm23_graulich_emrissues.ppt Jean-Sebastien Graulich Slide 2

  3. News • INFN didn’t approve this project • Even though MICE has been supported • Gianrossano withdrew • Construction responsibility has been transefered to University of Geneva: Franck Cadoux http://dpnc.unige.ch/photosmembres/cadoux.html • The COMO group (Milano) is still interested in developing the Front-end electronics Jean-Sebastien Graulich

  4. Detector Design Total: 2360 channels • Latest design used triangular shape (a la Minerva) • Base: 33mm, height:17 mm (nominal), Length: ~ 1 m • 59 bars per layer • 40 layers • Total thickness: 680 mm MICE CM January 2009 Jean-Sebastien Graulich Jean-Sébastien Graulich Slide 4

  5. Detector Design We have reconsidered: • Use of MultiAnode PMTs <-> Silicon PMT • Conclusion: Only the convention MAPM solution is compatible with a delivery in spring 2010 • Use of Last dynode signal for charge measurement in FADC (layer by layer) • Conclusion: the poor signal quality makes this solution too risky. The bars have fibers coming out from both sides: Side A : Individual signals to digital electronics Side B : Fibers bunched per layer -> 1” conventional PMT -> Analog electronics • Mechanical Assembly • Conclusion: Still under discussion • Number of Layers • Need simulation Jean-Sebastien Graulich

  6. Mechanical Assembly • Franck Cadoux, Mechanical Engineer, Geneva, is in charge • A prototype is needed • A visit to Trieste is scheduled for next week • Brainstorming has started and new ideas will be discussed • Individual bar fixation is considered • As opposed to clamped plans proposed by Trieste earlier • Fiber gluing to be outsourced • Main worry is QA of fiber connections to MAPMT Jean-Sebastien Graulich

  7. Simulations • Aim at • Validate the total length (number of layers) • Estimate the resolution in Pz obtained from the range measurement • At a later stage, optimize PID… • Run by Vassil Verguilov • Muons starting before TOF2, KL included • Parallel beam, small beam spot • Flat initial momentum distribution • No X-Y segmentation yet Jean-Sebastien Graulich Slide 7

  8. EMR Simulation • Range as a function of momentum Muons above 270 MeV/c are not stopped Last layer reached Jean-Sebastien Graulich

  9. EMR Simulation • Same as before; profile plot Approx. Lineardependence, as expected ~ ¼ layer per MeV/c Last layer reached Jean-Sebastien Graulich

  10. EMR Simulation • Straggling and Pz Resolution m Stopping in Layer 20 m Stopping in Layer 15 Counts per momentum bin Momentum at TOF2 (MeV/c) m Stopping in Layer 25 m Stopping in Layer 30 Jean-Sebastien Graulich

  11. EMR Simulation We obtain Pz Resolution estimate: • sPz ~ 4.2 MeV/c Similar to nominal Tracker (3.9 MeV/c) BUT This is for PT = 0 Where the actual tracker resolution is very poor: sPz > 20 Mev/c if PT <5MeV/c • To be continued Jean-Sebastien Graulich

  12. Responsibilities • Geneva • Construction and assembly • 1” PMTs and Analog electronics (FADCs) • High Voltage for MAPM • ~ 15 MAPM • WaveLength Shifter fibers (we will seek help fromJapanese colleagues) • High Voltage for 1” PMTs ? • Como/Milano • Electronics development • Test in beam • Trieste • ~ 20 MAPMs • WLS Fibers for the prototype • Fiber gluing technique (task to be outsourced) • Fermilab • Production of the scintillator bars Jean-Sebastien Graulich

  13. Plan • The aim is to have the detector ready for MICE in first quarter of 2010 • Some experience is required before we can have the full understanding of time scales • There will be two prototypes • Existing, small size, with square bars will be tested at CERN this spring or early summer, with final electronics and PMTs. Could be brought to MICE for integrationtest in fall 2009. • A double plane (x-y), full size, with triangular bars will be studied/assembled in Geneva in order to establish the construction principles. Jean-Sebastien Graulich

  14. The EMR group • Trieste INFN and Trieste University- Physics DepartmentErik Vallazza, Como Univ. and INFN-MiB Michela Prest, Valerio Mascagna Michela’s Boys&Girls: Andrea, Daniela, Davide, Said • University of Geneva Alain Blondel, Vassil Verguilov, J.S. Graulich, Franck Cadoux, Florian Masciocchi • FNAL Jean-Sebastien Graulich

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