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Scintillator ECAL for ILC for Calorimeter Review DESY May2007 Tohru Takeshita (CALICE-Shinshu) Idea implementation current status future mile stones.

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Presentation on theme: "Scintillator ECAL for ILC for Calorimeter Review DESY May2007 Tohru Takeshita (CALICE-Shinshu) Idea implementation current status future mile stones."— Presentation transcript:

1 Scintillator ECAL for ILC for Calorimeter Review DESY May2007 Tohru Takeshita (CALICE-Shinshu) Idea implementation current status future mile stones

2 ECAL in ILC Electro-Magnetic Calorimeter ECAL Role : to identify photons and pi0 fine segmentation lateral and longitudinal directions HCAL ECAL 1cm seg. hit info. only Tracker T.Takeshita cal-review@DESY May07

3 identify pi-zero two photon reconstruction 4GeV 10 20 50GeV distance between two photons ECAL 210cm from IP20GeV pi0 pictorial ECAL 1cm seg. depth T.Takeshita cal-review@DESY May07

4 Scintillator strip ECAL to reduce the number of readout channels orthogonal strips effective 1cm x 1cm area T.Takeshita cal-review@DESY May07

5 strip experience (det.) 20 cm long scintillator strips with Wave Length Shifting Fire read out (MAPMT) 20cmx1cmx2mm24layers WLSF T.Takeshita cal-review@DESY May07

6 strip experience (res.) pictorial calorimeter L1 L2 L3 L4 L5 L6 angle resolution strip # T.Takeshita cal-review@DESY May07

7 short strip ECAL for ILC to have less overlap of showers and charged particles in Jet environment for each layer, direction of strip aligned 90% effective 1cm x 1cm resolution MPPC read out : direct attached semi-conductor photo-sensor 1mmx1mm 1600 pixels Tungsten absorber : to reduce Mollier R. 5cm long 3mm 4mm T.Takeshita cal-review@DESY May07

8 MPPC Geiger Mode pixel Photon sensor independent development by us and Hamamatsu Photonics Inc. from SiPM 100, 400 and 1600 pixels in 1mm x 1mm T.Takeshita cal-review@DESY May07

9 MPPC development joint work going on with Hamamatsu 2005 冬 Dec-2005 Laser test 1600pix 25nm Jan-2007 T.Takeshita cal-review@DESY May07

10 MPPC cont. digital response of each pixel 0p.e. 1p.e. 2p.e. 3p.e. Vbias (V) Gain (10 ) 5 V : breakdown voltage 0 C : capacitance of a pixel 1600pix T.Takeshita cal-review@DESY May07

11 MPPC cont. Over voltage (Vbias- V 0 ) gain (10 ) 5 Dec/06 Feb/07 800 pieces of MPPC tested 1600pix Dec/06 Noise Rate (kHz) 300kHz Vober >0.5p.e. T.Takeshita cal-review@DESY May07

12 MPPC cont.: cross talk Feb/07 with FPCB Over voltage (=Vbias-Vo) an avalanche photon reaches neighboring pixel Dec/06 T.Takeshita cal-review@DESY May07

13 MPPC cont. : pix uniformity laser shot at the center of each pixel 3.2(x10 5 ) 3.8 (x10 5 ) 3.2(x10 5 ) 3.8 (x10 5 ) 20 x 20 pixels Sensor T.Takeshita cal-review@DESY May07

14 1600 MPPC current dev. T.Takeshita cal-review@DESY May07 #of pix ΔtΔt Δ  t(ns) Laser Linearity is a key for the calorimeter MPPC has principle limit of linearity by number of pixels significant linear behavior measured due to fast recovery time テキスト LED

15 scintillator strip two mega-strip and extruded strip with and without Wave Length Shifting Fibre Cast-Mega-strip Extruded-strip hole with TiO2 outer shield T.Takeshita cal-review@DESY May07

16 Fabrication of ECAL MPPCscintillator T.Takeshita cal-review@DESY May07

17 prototype ECAL at DESY dev. for CLAICE AHCAL DAQ SiPM GLID VO CALICE March/07 468 MPPCs T.Takeshita cal-review@DESY May07

18 DESY BT online without Tungsten plates 3GeV e6GeV e with Tungsten plates T.Takeshita cal-review@DESY May07

19 DESY BT calibration extracting Tungsten plate MIP=3GeV electron ped. last layerfirst layer Black … trigger/veto cuts Red … Yellow strips have non-pedestal signal Blue … Green strips have no signal MIP T.Takeshita cal-review@DESY May07

20 SC-ECAL DESY results (preliminary) linearity 1-6GeV 1 2 3 4 5 6 GeV energy measurement with WLSF T.Takeshita cal-review@DESY May07 linear than expected

21 SC-ECAL DESY results (preliminary) longitudinal shower profile electron resolution (1-6GeV) config.edge with WLSF T.Takeshita cal-review@DESY May07

22 Mile stones const. 4 times bigger Scintillator ECAL MPPC dev. and 2.5k prod. extrusion scintillator prod. embedded WLS fiber to strip Mega-extrusion electronics 2008 Beam test at Fermilab w HCAL to test pi0 reconstruction : r+n>r0+p r+r+ p 2photons desy data analysis T.Takeshita cal-review@DESY May07

23 summary & outlook scintillator ECAL in CALICE project with strip structure very much hardware progress : DESY- BT MPPC : photo-sensor scintillator simulation work to identify pi0 2008 TB at Fermilab engineering work T.Takeshita cal-review@DESY May07

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