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CDF Run2b: CCR and CPR Upgrade status

CDF Run2b: CCR and CPR Upgrade status. Bologna _22 _ 04 _ 2005. Michele _ Giunta _ INFN-Pisa _ & _ Università _ di _ Siena. Position in the CDF detector is between Solenoid coil and calorimeter. Michele Giunta. 2.

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CDF Run2b: CCR and CPR Upgrade status

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  1. CDF Run2b: CCR and CPR Upgrade status Bologna_22_04_2005 Michele_Giunta_INFN-Pisa_&_Università_di_Siena

  2. Position in the CDF detector is between Solenoid coil and calorimeter Michele Giunta 2

  3. CDF preshower used in >100 papers, about 1/2 of all Run I publications, including: • Higgs searches • High pT photons • Top quark • CPR2 helps separatinge/from+-/0 Top b EWK QCD SUSY Soft Lepton Tag SLT high pt e, W, Z +jet(s) ,e Interested groups: Michele Giunta 3

  4. Central Preshower Gas Proportional Chambers with slow response 0 1 2 3 4 5 6 7 8 9 TILES Per Wedge Total CPR 54 2,592 Central Crack Detectors behind 8 X0 Tungsten bar More Gas Proportional Chambers with slow response CCR 10 480 OLD CPR/CCR NEW CPR/CCR CCR CPR2 Scintillator Tiles Total n. of channels = 3,072 CPR tile: 12.5 x 12.5 x 2 cm 2x3 ()/tower Michele Giunta 4

  5. CPR2_Goals 1) Restore/mantain CPR performances (aging effects). 2) Overcome occupancy problems due to higher luminosity / avoid pileups 3) Improvement: finer segmentation, better S/N. 4) Shower Max detector only resolves single photons from meson decay till 35 GeV. CPR extends this limit by ~100 GeV. (Photon background subtraction) 5) CPR could improve jet energy resolution: • by correcting EM information for dead material losses (magnet coil, ...) • by measuring charged tracks energy before they enter the CEM • being more segmented than CEM Michele Giunta 5

  6. The Upgrade timetable • CPR/CCR upgrade was first planned for autumn 2005 • We did complete it one year in advance !! • Oct-dec 2003 : Almost Hardware Material Ordered • March 2004 : Internal fibers Kuraray ready • May 2004 : All scintillator Tiles ready (From Dubna) • June 2004 : Pol.Hi.Tech delivers external fibers • May-July 2004 : CPR2 assembly at Argonne • First week Sept. 2004 : CDF is opened, installation begins • Third week Nov. 2004 : CDF is closed, start CR test • Second week Dec. 2004 : Re-start collisions • Summer 2005 :There will be a NIM article Michele Giunta 6

  7. UPGRADE parts , institutions & contributions Fibers : INFN HV system & Control : INFN R&D materials and PMT test : INFN GEANT simulations : INFN CPR2/CCR assembly : ANL, INFN , KCHEP, MSU, and installation Rockefeller, FNAL Signal cables & transition cards : ANL PMTs : Tsukuba PMT boxes & optical cables : MSU Scintillator Tiles : Dubna &INFN Michele Giunta 7

  8. UPGRADE_PEOPLE INFN Pisa (7 tecnici per un totale di 4 MU tra assembl. e montaggio) S. Lami A. Menzione R. Paoletti A. Scribano N. Turini M. Giunta Univ. Roma 1 ( 1 tecnico per un totale di circa 1 MU tra assembl. e montaggio) M. Iori INFN Pavia G. Introzzi Univ. Trieste & Udine (3 tecnici per un tot. di 2 MU tra assembl. e montaggio) A. Penzo G. Pauletta Michele Giunta 8

  9. Installation 1 Michele Giunta 9

  10. Installation 2 3 2 1 Michele Giunta 10

  11. A B 125 mm 125 mm C D CPR2 detector :: photos Michele Giunta 11

  12. NEWCPR Delivered Photoelectrons • Specification for phe delivery was to get at least 5 phe/MIP • After scintillatior, green fiber (glued for farest tiles), splicing, clear fibers, cables, PMT we get in average ~ 14 phe/MIP Pulse hight spectrum: 10 ADC = 1 phe Cosmics Michele Giunta 12

  13. NEWCPR Occupancy Old New Michele Giunta 13

  14. NEWCPR e/separation Michele Giunta 14

  15. NEWCPR LinearEnergyResponse channel equalisation for tile gain 2 weeks ratio Michele Giunta 15

  16. The End Michele Giunta 16

  17. BK slides begin now Michele Giunta 17

  18. New_CCR Crack Detector detects photons in cracks (8% of coverage) that generates “fake” missing energy. • Scintillator-based, has 1 tile / CEM tower. • Each CCR module has 225x 50x 5 mm tiles • Uses the same tungsten bar (8.5 X0). • 80% of 50 GeV electrons energy from test-beam is lost in coil+tungsten bar • Not yet calibrated nor simulated (CPR2 had priority in commissioning) Michele Giunta 18

  19. Total n. of channels = 3,072 CPR tile: 12.5 x 12.5 x 2 cm 2x3 ()/tower Photomultipliers 16 channels per PMT (R5900) 192 HV channels CAEN HV SY527 TILES Wedge Total CPR 54 2,592 CCR 10 480 CPR2 Overview WLS fiber into groove, spliced to clear fiber at tile exit, routed to optical connector Specs want CPR to give >5 pe per MIP at PMT (>10 pe at tile exit due to splicing + connector + 5m clear fiber) We get 16, Michele Giunta 19

  20. Green gas pipe CPR Other arch wall C Tungsten B CPR CPR CPR CPR Tungsten / CCR The OLD CPR detector Criostat and coil Michele Giunta 20

  21. Michele Giunta 21

  22. CPR2 _ Calibration_1 LERS: (linear energy response) Equalizes tiles for uniform output to same signal Absolute calibration: done, but there is no analisys using CPR2 because Production is not yet updated. Eache tile il easily calibrated with MIP in 5 minutes of collider data. Michele Giunta 22

  23. MC MC /0separation Michele Giunta 23

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