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MINOS NEAR DETECTOR

MINOS NEAR DETECTOR. Status Plans for Installation and Commissioning. P. Shanahan FNAL AlExp 11/17/03. MINOS Detectors. 1” Fe/1cm plastic scintillator 4.1 cm transverse segmentation WLS fiber readout into multi-anode PMTs. Near Detector readout single ended. Near Detector.

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MINOS NEAR DETECTOR

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  1. MINOS NEAR DETECTOR • Status • Plans for Installation and Commissioning P. Shanahan FNAL AlExp 11/17/03

  2. MINOS Detectors • 1” Fe/1cm plastic scintillator • 4.1 cm transverse segmentation • WLS fiber readout into multi-anode PMTs Near Detector readout single ended

  3. Near Detector • Smaller than Far Detector • 282 planes (153 scintillator), partial instrumentation • 980t, 4.8m x 3.8m x 16.6m • 1.2T magnetic field Every 5th plane throughout detector is fully instrumented

  4. Near Detector Function First 120 planes: each plane instrumented Last 162 planes: multiplexed spectrometer region cm Target region MC Spectrometer Region:4x multiplexing, 4/5 planes not instrumented Veto region Calorimeter region cm cm cm

  5. Readout Electronics Front End Mother Boards (MINDERs) • High Rate Neutrino Experiment • >30 interactions/10ms spill • QIE based system • Multiranging, Deadtimeless 19ns sampling over entire spill • Electronics Assembly nearly complete • Checkout >50% complete MINDER Crate QIE Daughter Board(MENU) Trigger/Keeper Readout Crate Readout Boards (MASTER) Component Count (not counting ~10% spares): 9328 MENUS 583 MINDERS 81 MASTERS

  6. Near Detector Status • All ND planes ready for installation • Staging at New Muon • Rack assembly in progress • Beneficial Occupancy: Jan. 31, 2004 • Integration tests: 8 spectrometer planes • Prior to B.O., test integration of planes, fiber cables, PMTs, electronics, Light Injection • Possibly readout with DAQ, schedule permitting

  7. Installation • Installation expected to start ~ 6-8 weeks after Beneficial Occupancy • Aim for 2 planes/day • Stage from NMS to MINOS Surface Building • Expect O(30) weeks to complete Practicing plane manipulation with strongback

  8. Commissioning • Aim to commission planes as they go in • Light leaks • basic functioning, operational parameters of scintillator, PMT, electronics, Light Injection system • Great experience gained at Calibration Detector at CERN • Hope to demonstrate interactions in 1st few minutes of neutrino beam.

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