1 / 20

Development and Status of HCAL Physics Prototype for CALICE Collaboration

This document summarizes the concept, development status, and time plan for the HCAL physics prototype presented by Volker Korbel at DESY. Networking with international collaborators from institutions in Russia, Europe, and Japan, the discussions focused on advancements in photodetector technology, scintillator materials, and calibration techniques. Key topics include light yield measurements, detector granularity strategies, preamplifier options, and the production of modular tile structures. The details were shared at the CALICE collaboration meeting held in Montpellier, France, from November 13-16, 2003.

jennifer-snyder
Télécharger la présentation

Development and Status of HCAL Physics Prototype for CALICE Collaboration

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. The Tile-HCAL Physics Prototype;concept, status, time plan Volker Korbel, DESY, for the CALICE Coll. Montpellier, France, 13-16 November 2003 • Groups involved: • DESY • DUBNA • Moscow: • ITEP • LPI • MEPHI • Prague: • Inst. of Physics, • Charles Univ. • more co-operation: • from CALICE: • UK groups for HCAL DAQ • LAL/ Orsay, preamps • US, NICADD/NIU, >> scintillators, TC, Si-PMs • abroad: • Japanese Groups (KEK, Universities), Photodetectors See:talks with more details >>> B. Dolgoshein, G. Eigen, E. Garutti, V.K., V. Morgunov, R. Poeschl,A. Raspareza

  2. tiles, fibers, light yield Centre/straight WLS-fibre Diagonal/bent WLS-fibre No stress on fibre, fibre end reflector =tile reflector more stress on fibre, fibre end reflector =tile reflector L=7.85cm L=7,85cm L=5cm • clear RO fibres: • l=1-3.5m to photo detector • light attenuation <18% • 1.4 mm hole in centre • drilled and polished • For 5 cm straight WLS-fibre RO • cheep, for SiPM’s only • Single looped fibre • strong fibre bending, • most stress on fibres, • probably ageing damages? L=20cm Scintillator: PS, ITEP/Vladimir: BASF-143, cast them in tiles, 40 m2 Light yield for MIP’s (used for calibration): 18-25 ph.e. on photo-cathode Montpellier, France, 13-16 November 2003

  3. Photo-detectors WLS & sensor 2 ways: “Conventional” “Direct coupling” SiPM APD • see Boris, Erika’s talk: • Si-PM’s (MEPHI/Pulsar): • large quantities • APD’s (Hamamatsu S8664-55spl) • ~140/200 • >1 x 1 mm2 special new APD’s ordered • > R&D prepared x x x Montpellier, France, 13-16 November 2003

  4. Minical predecessor of Ppt E-beam, muons • Aim of these studies: • cosmic muons: • different photodetectors • LY improvements • uniformity of response • calibration with MIP’s • long term ageing • LED monitoring: • stability • dynamic range measurement • e-beam, study of: • energy resolution • constant term Montpellier, France, 13-16 November 2003

  5. Granularity for Ppt • Strategy: • Individual tile RO mostly • Larger granularities (smaller tiles) in inner core • Abandon smallest tiles in last sandwich layers (~1/3...1/4) • Recover shower leakage in a tail catcher, scint. strip RO • A lot of pad configurations studied by: • V. Morgunov, A. Raspereza; DESY • V. Zutshi; NIU • to optimize: • individual cluster separation • shower overlap reconstruction • energy resolution, software weighting • include semi-digital and digital DigiCal studies (NICADD, NIU) Montpellier, France, 13-16 November 2003

  6. 3, 6 and 12 cm Example: pad sizes increase x 2 +/-0,79 l Montpellier, France, 13-16 November 2003

  7. Optimal overlay geometry ? • Only 3 sizes, modular: • 3, 6 and 12 cm tiles: • 98 x 98 cm2 covered • room for outside frame • best in: • overlay of events to jets • all tiles to be produced • in single press form Montpellier, France, 13-16 November 2003

  8. Preamps • Strategy: study several options, choose appropriate one • prototypes in stud: • for Si-PMs • principally no preamp needed, or low gain (~10), PM-amplifier? • but trigger delay needs longer pulse shaping • fast preamp needed for calibration with single ph.e. peaks? • for APDs • voltage sensitive (Prague), large gain • charge sensitive: • 1. ECAL type for APD gain >200: 12 mV/7.2 fC • 2. improved ECAL type, lower Cin, larger gain • designed at LAL <100: 12 mV/1.8 fC • 3. MINSK/Gilitski preamp Montpellier, France, 13-16 November 2003

  9. The VFE-ROB-scheme, Si-PMs HV on board, PC controlled ? ~ 60 V dV/V~10-3 PIN diode for LED monitoring LED signals beam cosmic HV, decoupled Trigger/ RO clock pedestals Calibr. pulses DAC voltage sens. preamps (gain ~10) pulse shapers Sample & hold Multi plexer (analog) Montpellier, France, 13-16 November 2003

  10. The VFE-ROB-scheme, APD’s HV, < 440 V on board dV/V~10-5 0,03 mA/ch PIN diode for LED monitoring LED signals beam cosmic HV, decoupled, common HV setting ?? DAC, pedestals Trigger/ RO clock Charge injection Array of single APD’s n x 9 x 2 charge sensitive preamps pulse shapers Sample & hold Multi plexer (analog) Montpellier, France, 13-16 November 2003

  11. Dubna test board for CAMAC RO HV FLC 1 FLC 2 LVDS1 ADC LVDS2 LVDS3 FLC 3 DAC Charge injection FLC 4 • VFE-Board houses: • APD array fibre mask • Preamp chips • LV supply • HV-PS (400 V) • LED monitoring • multiplexed RO • > VFE / CAMAC RO Ready soon for tests with CAMAC later VME-RO LED test Montpellier, France, 13-16 November 2003

  12. Ppt stack, new design • Absorber plates: • Metal sheet: • EN 10 029-16D x 1005 x 1005 S G • Steel: • Stahl EN 10 025-Fe 360 B • 36 layers, Fe, • 16 +/- 0.95 mm, • flatness 3 mm • cut to 100x100 cm2 • ~135 kg • Sandwich structure: • 6.5 mm scintillator + fibers • 6.5 mm is max • also for other detector layers • 2 x 2 mm cover plates,+/-0.95mm • 100 x100 cm outer dimensions • Thickness tolerances >0.5 mm • Cassettes: • -Housing sensor plates • -easy to exchange • -Cassette weight ~32 kg (Tile-HCAL) total Ppt stack weight ~6 t Montpellier, France, 13-16 November 2003

  13. Ppt on moving platform • Cassette insertion • from this side • VFE electronic • VME-DAQ • on platform Beam height 2,30 m, platform: weight ~ 10 t, width ~ 5 m, depth ~ 2 m Montpellier, France, 13-16 November 2003

  14. Ppt at inclined beam incidence Top view Distance bolts 35° to beam Is angular range of 0-35° sufficient? Montpellier, France, 13-16 November 2003

  15. Calibration with cosmic m’s Rotation around horizontal axis: ??Fixed rotation rolls/tools or rotation by crane?? Montpellier, France, 13-16 November 2003

  16. Some comments on the tail catcher • Discussions during last Tile-HCAL main meeting: • (NIU, DESY), today's status>>>: • I. section, 20 sandwich layers with same segmentation, • 2 cm Fe, 0.5 cm Scintillator • 100 x 100 cm2, Fe provided by DESY, sort out worst from 56: • Strip RO, 10 or 12 cm wide strips • Si-PM RO, from both sides ? • 40 cm Fe, ~ 2.4 l • needs 320 Si-PMs (Si-PM’s on both sides, 12 cm strips) • essential for Tile-HCAL stand alone tests • Followed 1.8 lof dead, coil like material • Than coarser segmentation II. section: • 5 layers, 10 cm Fe absorber, ~ 3 l • scintillator (1 cm thick), strip or pad RO • needs more simulation studies (NIU-NICADD group) • US could provide • extruded scintillator with grooves, steel from FNAL Montpellier, France, 13-16 November 2003

  17. More on Ppt structure • Design and construction in hands of • Karsten Gadow, DESY, H1, • wants not to be contacted by all individuals • as filters actFelix or me • We ask for comments, agreement to: • Fe plates, 16 mm, + 0.85 mm, no steel? • Sensor casettes with 2x2 mm Fe-sheets? • keep gap thickness (10+0,5 mm) ? • Lateral dimensions (100x100 cm2) ? • Angular measurements program ? • Problems with connectors, gas,….? • Moving platform performance • TC structure (also heavily involved, US (V. Zutshi) Montpellier, France, 13-16 November 2003

  18. the Ppt construction program, draft • Ppt stack construction: • 3 months tender and ordering, 3 months to build • Moving beam platform included in these 6 month • Press form for tile production: 4 months • Scintillator production >> tiles: 3 months • Cassettes design to be fixed next 3 months • All equipped cassettes could be available in end October 2004 • Si-PMs • 1. ~5000, 3 months production, 3 months acceptance tests • 2. batch (~3000) needed • Acceptance tests with Si-PM’s already mounted in tiles • needs 3 months after production, 1. September finished • More APD’s to order, have soon 58, need 140 (200?) • Decision on preamps and VFE logic for Si-PM’s and APD’s in 2003 • Prototype VFE board, Dubna, needed spring 2004, all delivered 9/2004 • CALICE-UK DAQ prototype ready 1. March 2004 • >>March-August, System tests with cassettes, • cosmic and DAQ at DESY, with increasing # of cassettes • Ppt e-beam test with ECAL at DESY in October 2004 Montpellier, France, 13-16 November 2003

  19. The future The CALICE Physics Prototype >>3-5 months data collection in e,p,p,m test beam(s) starting in spring 2005 Montpellier, France, 13-16 November 2003

  20. Small core tile pattern +/-0,66 l Montpellier, France, 13-16 November 2003

More Related