On behalf of CEPC calorimeter working group 2018/12/26 CEPC ECAL R&D Status Yunlong Zhang On behalf of CEPC calorimeter working group State Key Laboratory of Particle Detection and Electronics, China University of Science and Technology of China

International Workshop on the CEPC 2017 2018/12/26 Outline Motivation CEPC ECAL Sensitive Detector Readout Electronics Test Results Cosmic rays test Beam test Summary International Workshop on the CEPC 2017 2018/12/26

International Workshop on the CEPC 2017 2018/12/26 1.1 关键分系统研制 Motivation Circular Electron Positron Collider (CEPC) Ecm240GeV, luminosity ~21034 cm-2s-1 can also rum at the Z-pole Precision measurement of the Higgs boson (and the Z boson) e+e-  ZH International Workshop on the CEPC 2017 2018/12/26

International Workshop on the CEPC 2017 2018/12/26 1.1 关键分系统研制 Requirements of CEPC EMCal ILD-like detector with additional considerations. The Particle Flow Algorithm (PFA) calorimeter concept was proposed High granularity Good shower separation Good energy resolution International Workshop on the CEPC 2017 2018/12/26

International Workshop on the CEPC 2017 2018/12/26 Outline Motivation CEPC ECAL Sensitive Detector Electronics Test Results Cosmic rays test Beam test Summary International Workshop on the CEPC 2017 2018/12/26

International Workshop on the CEPC 2017 2018/12/26 1.1 关键分系统研制 PFA Calorimeter International Workshop on the CEPC 2017 2018/12/26

International Workshop on the CEPC 2017 2018/12/26 1.1 关键分系统研制 CEPC ECAL Sampling Calorimeter Sandwich structure Absorber+SD+Electronics Absorber Tungsten Sensitive Detector Scintillator+SiPM Readout Electronics SPIROC Chip International Workshop on the CEPC 2017 2018/12/26

International Workshop on the CEPC 2017 2018/12/26 1.1 关键分系统研制 ECAL Optimization I Total thickness: 24 X0 Sampling number: 30 layers Granularity: <10mm*10mm International Workshop on the CEPC 2017 2018/12/26

International Workshop on the CEPC 2017 2018/12/26 1.1 关键分系统研制 ECAL Optimization II Dynamic range of ECAL SD 1MIP – 800 MIPs ~10 pe @ 1 MIP SiPM ~10k pixels Gain of SiPM:~105 SPIROC:160fC – 100 pC 240 MeV (800MIPs) 100GeV γ Max edep in SD Shower profile in ECAL International Workshop on the CEPC 2017 2018/12/26

International Workshop on the CEPC 2017 2018/12/26 1.1 关键分系统研制 Elements of ECAL Scintillator （5mm*45mm*2mm） SiPM（1mm＊1mm10000 pixels） Dynamic range：~100fC~200pC channels：36 Dead time：2ms Polar: positive power：8mW/channel International Workshop on the CEPC 2017 2018/12/26

International Workshop on the CEPC 2017 2018/12/26 1.1 关键分系统研制 SiPM Test LED test system LED test system was built to test the SiPM dynamic range Pixel:25um Pixel:10um International Workshop on the CEPC 2017 2018/12/26

International Workshop on the CEPC 2017 2018/12/26 1.1 关键分系统研制 SiPM Test The width of LED light are:12ns,20ns and 30ns International Workshop on the CEPC 2017 2018/12/26

International Workshop on the CEPC 2017 2018/12/26 1.1 关键分系统研制 Scintillator Test Plastic scintillator Size: 2mm*5mm*45mm “high energy” β-rays as MIPs to test SD pedestal 90Sr Spectrum Typical Beta energy distribution International Workshop on the CEPC 2017 2018/12/26

International Workshop on the CEPC 2017 2018/12/26 1.1 关键分系统研制 Scintillator Test Plastic scintillator Several different package methods Light yield uniformity: 9% β-rays The light yield uniformity International Workshop on the CEPC 2017 2018/12/26

International Workshop on the CEPC 2017 2018/12/26 Readout Electronics SiPM front-end with ASIC SPIROC2b of 36 channels FPGA (Artix-7 200T) DIF is compatible for further FEB USB for data upload & cmd sending USB for single DIF, and serial port for DAQ when using multiple DIF Switched capacitor array store charge measurement 12 bits ADC conversion Variable Gain due to: adjustable Cf of pre-amplifer Rload on the board Shaping time and delay International Workshop on the CEPC 2017 2018/12/26

International Workshop on the CEPC 2017 2018/12/26 1.1 关键分系统研制 Readout Electronics Test platform Signal generator for electronic testing Sci + SiPM detector with cosmic triggers Power supply, oscilloscope and PC FEB DIF Test Platform International Workshop on the CEPC 2017 2018/12/26

International Workshop on the CEPC 2017 2018/12/26 1.1 关键分系统研制 Readout Electronics   Sigma=5.6 The details could be seen in Shensen’ Poster International Workshop on the CEPC 2017 2018/12/26

International Workshop on the CEPC 2017 2018/12/26 Outline Motivation CEPC ECAL Sensitive Detector Electronics Test Results Cosmic rays test Beam test Summary International Workshop on the CEPC 2017 2018/12/26

International Workshop on the CEPC 2017 2018/12/26 1.1 关键分系统研制 Cosmic Ray Test Three different scintillator materials were tested by cosmic rays Plastic scintillator BC408 EJ200 Crystal BGO crystal SiPM S12571-010P 1mm*1mm 10k pixels The details could be seen in Yazhou’ Poster International Workshop on the CEPC 2017 2018/12/26

International Workshop on the CEPC 2017 2018/12/26 1.1 关键分系统研制 Test Results EJ200 BC408 BGO Amp:134 Amp:140 Amp:110 International Workshop on the CEPC 2017 2018/12/26

International Workshop on the CEPC 2017 2018/12/26 1.1 关键分系统研制 Test Results Compared with CALICE-EBU ECAL Our Result CALICE-EBU ECAL Results International Workshop on the CEPC 2017 2018/12/26

International Workshop on the CEPC 2017 2018/12/26 1.1 关键分系统研制 Beam Test Driver circuit: C12332-01 S12571-025P (Hamamatsu), BC408 with dimension of 45mm×5mm×2mm Schematic of readout Carried out at E3 beam at IHEP in June 2017, Proton and pion mixed irradiation, the momentum of the particles are from 400MeV to 1.1GeV International Workshop on the CEPC 2017 2018/12/26

International Workshop on the CEPC 2017 2018/12/26 1.1 关键分系统研制 Test Results 400MeV/c Pion 700MeV/c Pion 1000MeV/c Pion 400MeV/c Proton 700MeV/c Proton 1000MeV/c Proton International Workshop on the CEPC 2017 2018/12/26

International Workshop on the CEPC 2017 2018/12/26 1.1 关键分系统研制 Test Results dE/dx vs. Momentum International Workshop on the CEPC 2017 2018/12/26

International Workshop on the CEPC 2017 2018/12/26 Outline Motivation CEPC ECAL Sensitive Detector Electronics Test Results Cosmic rays test Beam test Summary International Workshop on the CEPC 2017 2018/12/26

International Workshop on the CEPC 2017 2018/12/26 Summary Optimization of ECAL Sampling Calorimeter with high granularity sandwich structure 24 X0, 30 layers, 5mm*5mm granularity… Electronics board based on SPIROC chip was designed A 90Sr test system was built to test the uniformity plastic scintillator. The uniformity is better than 10%. An LED system was built to test the SiPM. The MIPs signals were tested using cosmic rays One layer prototype will be built in the first half of next year International Workshop on the CEPC 2017 2018/12/26

International Workshop on the CEPC 2017 2018/12/26 Thank You International Workshop on the CEPC 2017 2018/12/26