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MINERvA and Test Beams: First Thoughts Kevin McFarland, University of Rochester

MINERvA and Test Beams: First Thoughts Kevin McFarland, University of Rochester. Apology. MINERvA’s lack of presence at this meeting does not indicate a lack of interest We have a directors’ review Dec 13-15 and the entire collaboration management is unavailable to present in person

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MINERvA and Test Beams: First Thoughts Kevin McFarland, University of Rochester

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  1. MINERvA and Test Beams:First ThoughtsKevin McFarland, University of Rochester

  2. Apology • MINERvA’s lack of presence at this meeting does not indicate a lack of interest • We have a directors’ review Dec 13-15 and the entire collaboration management is unavailable to present in person • If this facility is not available, we will have to run a test beam program elsewhere • CERN SPS, KEK endstation, etc. • We very much would prefer to run at FNAL

  3. In a Nutshell MINERvA needs to reconstruct low energy(p~0.3-5 GeV) pions, electrons and (p~1-5 GeV) protons. Kaons and muons (both charges), if available would be used to study stopping particles. Measure response relative to minimum ionizing before showing, shower development and stopping signature. Benefit of a test beam for this program is obvious. MINERvA would want to install a configurable small detector as a stand-in for the actual detector. Issues that require study • Configuration of test detector (size) • Run plan: date, statistics and # of configurations

  4. ~1.2m Strawman MINERvA Testbeam Detector • Caveats: sizes and details need further study! • Envisaging ready for beam by summer 2008 • See additional slides for details of the actual MINERvA detector for which thisis a stand-in • Structure: planes ofactive detector(scintillator strips)with absorbers • Pb ring segmentor Pb sheet or Steel sheet forside ECAL, DS ECAL or DS HCAL can be inserted

  5. Lengthy Material on MINERvA Detector

  6. Basic Detector • MINERvA proposes to build a low-risk detector with simple, well-understood technology • Active core is segmented solid scintillator • Tracking (including low momentum recoil protons) • Particle identification • 3 ns (RMS) per hit timing(track direction, stopped K±) • Core surrounded by electromagneticand hadronic calorimeters • Photon (p0) & hadron energy measurement • MINOS Near Detector as muon catcher n

  7. MINERvA Detector Module Outer Detector (OD)Layers of iron/scintillator for hadron calorimetry. 6 “Towers” • A frame with two planes has 304 channels • 256 in inner detector • 48 in outer detector(two per slot) • 4¾ M-64 PMTs per module • OD readout ganged in groups of four planes Lead Sheets for EM calorimetry Inner Detector (ID) Hexagonal X, U, V planes for 3D tracking 162 in

  8. Parts of MINERvA Modules • An Outer Detector Frame is assembled from steel towers • Frame hooks and support spacers are added • One or more planes of scintillator is added • Pb ring for the side ECAL (not in DS ECALs) • complete active target “module”

  9. Parts of MINERvA Modules(cont’d) • Modules are stacked up like hanging file folders onto the stand • spacing set by flatness of OD steel, fiber clearance • Nuclear Targets in separate (passive) frames interspersed • Veto Wall in front of the detector

  10. Parts of MINERvA Modules(cont’d) • Calorimeter modules are built by adding absorbers • one 1” steel absorber and one scintillator plane in DS HCAL • two 5/64” Pb absorbers and two scintillators in DS ECAL

  11. Side HCAL (OD) Side ECAL Fully Active Target NuclearTargets DownstreamHCAL Downstream ECAL ID Side ECAL Veto Wall Mass of MINERvA Side HCAL: 116 tons Side ECAL Pb: 0.6 tons Fully Active Target: 8.3 tons DS ECAL: 15 tons NuclearTargets: 6.2 tons(40% scint.) DS HCAL: 30 tons

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