1 / 16

ATLAS Forward Calorimeter Hadronic Test Beam Results

ATLAS Forward Calorimeter Hadronic Test Beam Results.

cindy
Download Presentation

ATLAS Forward Calorimeter Hadronic Test Beam Results

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. ATLAS Forward Calorimeter Hadronic Test Beam Results • J.Armitage,L.Babukhadia,D.Bailey,M.Dixit, M.Donkers,T.Embry,V.Epshteyn,P.Gravelle,J.Hamm,J.Kamnitzer,V.Khovanskii,D.Koolbeck, P.Loch,M.Losty,J.Mayer,R.Mazini,G. Oakham, M.O’Neill,R.Orr,D.Paterson,J.Rutherfoord,M.Ryabinin,A.Savine, J.Seeley,P.Shatalov,L.Shaver, M.Shupe,G.Stairs,D.Tompkins,W.Trischuk,K.Vincent,D. Waller,V.Zeyteev • Arizona - CRPP Carleton - ITEP - Montreal - Toronto See also talks by • R.Mazini & P.Loch: Comparison of electron data with GEANT3 and GEANT4 • A.Savine: Hadronic energy resolution improvement using transverse information Atlas FCAL - David Bailey

  2. ATLAS Forward Calorimeter Tag forward jets Measure missing ET FCAL =3.2 =4.9 ~ 40Mhz ~ 108 GeV/cm2/s at =4.5 ~ 106 Gy/year ~ 100 Watts absorbed Atlas FCAL - David Bailey

  3. 45 cm Metal absorber / Liquid Argon with rod anodes in longitudinal channels FCAL 1 - Cu matrix + rods - 2.6 l, 28X0 , 2.1 t FCAL 2 FCAL 3 - W matrix + rods, Cu tubes - each ~ 3.7 l, 90 X0 , 4 t Atlas FCAL - David Bailey

  4. Anode Spacing (FCAL1/2/3) • 7.5 / 8.18 / 9.00 mm FCAL End View Liquid Argon gap • 250 / 375 / 500 mm FCAL1 Anode Structure Atlas FCAL - David Bailey

  5. FCAL2 Endplates and inner absorber Atlas FCAL - David Bailey

  6. Tube and slug matrix Cutaway demonstration of matrix Atlas FCAL - David Bailey

  7. Tungsten slugs 100 µm Powder • 97% W Binder • 2% Ni • 1% Fe Atlas FCAL - David Bailey

  8. FCAL Module-0‘s under construction FCAL1 FCAL2 Atlas FCAL - David Bailey

  9. Module-0 beam setup at CERN Beam 20-200 GeV e, π, µ FCAL2 FCAL1 MWPCs in front of cryostat, tailcatcher and muon tagger behind Atlas FCAL - David Bailey

  10. Beam test results • FCAL modules work very well • Good resolution, linearity • Metals conduct electricity very well Atlas FCAL - David Bailey

  11. Parts cleaned by • degreasing solvent • ultrasound in hot alkaline detergent • ultrasound in hot acidic cleaning solution • high pressure rinses • assembled in Clean room • module HV tested Before After Swab tests of inside of tubes BUT ... Atlas FCAL - David Bailey

  12. On arrival at CERN from Canada, there were about 1% shorted (but repairable) anodes Metal shards shaken loose during transport. e.g. from swaging (attaching) tubes to endplates. Inside of swaged tube Atlas FCAL - David Bailey

  13. Shipping Test of 1000 tube test module Module driven for 3 hours: 1.5 hours on highway 1.5 hours on very rough unpaved Canadian back roads Crate not fixed to truck, so it could bounce and move. Module tested at 800 V after trip: no breakdowns Atlas FCAL - David Bailey

  14. Ebeam Energy Resolution 20 40 60 80 120 200 GeV • FCAL energy (using radius weighting)* • conventional Erec 0.25 0.20 0.15 0.10 0.05 0 * See talk by A.Savine Atlas FCAL - David Bailey

  15. FCAL Hadronic Linearity Reconstructed energy in FCAL vs  pion beam energy Atlas FCAL - David Bailey

  16. Conclusions • ATLAS FCAL module-0 beam test very successful • ATLAS FCAL technology meets design requirements • Test has lead to improved construction and reconstruction methods Atlas FCAL - David Bailey

More Related