1 / 15

Status & WBS of Cosmic Ray Shield

Status & WBS of Cosmic Ray Shield. DETECTOR REQUIREMENT : Record Potential CR Bkg Hits for All Trigger Evts. Cosmic ray induced 100 – 110 MeV e - events in detector region, (delta rays or mu decay e - ), require active and passive shielding to suppress.

imaran
Download Presentation

Status & WBS of Cosmic Ray Shield

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Status & WBS of CosmicRay Shield DETECTOR REQUIREMENT :Record Potential CR Bkg Hits for All Trigger Evts • Cosmic ray induced 100 – 110 MeVe- events in detector region, (delta rays or mu decay e-), require active and passive shielding to suppress. • CR Sim Study has shown that 10- 4 Inefficiency in a scintillator shield design <-> 0.004 bkg evts / 107s. run. • Achieving Max Hermeticityin Detector Deployment • Achieving Max Detector Efficiency For Cosmic Rays with 2-Fold ORs in a 3 Scintillator Layer Design • Achieving Max Reduction of Mu Capture Neutrons in CRS • Developing CR Simulation Studies for Latest CRS & DS Tracker and Calorimeter J Kane - W & M MECO Collaboration Mtg - UCIrvine Feb. 06/07, 2005

  2. Conservative Footprint of CRS Detector TOP VIEW - Shows Scintillator Modules & Concrete Blocks High CR Shield Hermeticity

  3. End View of Active & Passive CR Shield Hermeticity of Shield Planes - L, R, T, B,& E

  4. Half Modules between Floor Beams - 96% Coverage Shield-B 96% eff

  5. Full Module Design - 10cm Overlap by Neighbors

  6. A Close-up View of Hermeticity Overlap of Full Modules (2.2 x 4.5m) Al Plate Scintillator Layer-1 (22 bars / 3 WSF ea) Bottom Modules (1 x 4.4m) - beneath Return Yoke

  7. CR Detector Efficiency • Cosmic Ray Response vs. No. of WSF in 0.5m MINOS Scintillator Within the next 3 months 100 extruded full length scintillator bars should be available for attenuation studies & testing of module assembly methods.

  8. Optical Fibers-to-16 Pixels of H8711 PMT Assembly

  9. Investigation of 64 Pixel PMTs

  10. BURLE PLANACON MCP - PMT

  11. H8500 MultiAnode PMT Assembly - 64 Pixels Discussion with Stan Majewski (head of Jlab Detector Group) Burle Planatron vs Hama H8500 : He questioned using the first - low in gain & too untested His group has much experience with the H8500. Hama has given Jlab 60 for testing in medical scanner apps. The group has developed a fast preamp that mates directly to back of base . Price per channel? / Stan expressed real interest in helping us in any way. Having Hama’s ear, he plans to push them to offer a “green-enhanced” cathode for WLS fiber users in HEP.

  12. Further Properties

  13. First Visit to ITASCA on Feb 16, 2005 Attending : ITASCA Staff / Anna Pla-Dalmau / J Kane / Uwe Greif Anna Pla : MINOS Manager of Production / Director of FNAL Scintillator Development Lab Uwe Greif : Colorado School of Mines / nu-e Expt @ Spallation Source requiring CR Shield Agenda : Review Tolerances asked for in Drawing / Tour Factory Floor / Press the Flesh Visit to Development Lab : Offer from Anna

More Related