simulation and progress of tpc prototype for the future
TRANSCRIPT
Simulation and progress of TPC prototype for the future collider
Huirong Qi, Zhiyang Yuan, Yiming Cai, Yue Chang, Jian Zhang, Yulan Li, Zhi Deng, Hui Gong, Jin Li, Yuanbo Chen, Hongyu Zhang,
Ye Wu, Xinyuan Zhao, Yuyan Huang, Haiyun Wang, Yulian Zhang
2019.10.18
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Outline
Requirements Simulation of IBF at Z TPC prototype R&D Summary
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Three Detector Concepts (CEPC CDR) Baseline: Silicon + TPC FST: all-silicon tracker IDEA: Silicon+Drift chamber (DCH)
ArXiv:1811.10545
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TPC requirements for CEPC TPC detector concept: Under 3 Tesla magnetic field
(Momentum resolution: ~10-4/GeV/c with TPC standalone)
Large number of 3D space points(~220 along the diameter)
dE/dx resolution: <5% ~100 µm position resolution in rφ
~60µm for zero drift, <100µm overall
Systematics precision (<20µm internal)
TPC material budget <1X0 including outer field cage
Tracker efficiency: >97% for pT>1GeV 2-hit resolution in rφ : ~2mm Module design: ~200mm×170mm Minimizes dead space between the
modules: 1-2mm
Overview of TPC detector concept
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Brief summarize
Compare with ALICE TPC and CEPC TPC
ALICE TPC CEPC TPC
Maximum readout rate >50kHz@pp w.o BG? Gating to reduce ions No Gating No Gating Continuous readout No trigger Trigger? IBF control Build-in Build-in IBF*Gain <10 <5 Calibration system Laser NEED
TPC limitations for Z Ions back flow in chamber
Calibration and alignment
Low power consumption FEE
ASIC chip
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Resolution along drift length (simulation)
Moment resolution 10^(-4)
Zhiyang Yuan
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Simulation of IBF effect
Simulation Based on the ILC-KEK codes Re-established model Validated with 3 ions disks Still more works with the
simulation module till now
Zhiyang Yuan
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3×1034cm-2s-1 (Lumi.)
Simulation of deviation with IBF (k=Gain×IBF) @CEPC Zhiyang Yuan
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17×1034cm-2s-1 (Lumi.)
Simulation of deviation with IBF (k=Gain×IBF) @CEPC
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Update results of IBF from detector module
IBF×Gain has the limitation ratio from the detector R&D at high gain. How to do it next ? Any new ideas? (Lower gain and no IBF)
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Readout of TPC
Standard charge collection ASIC chip with sensors
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Pad TPC and Pixel TPC
Particle Track
Standard charge collection Pad: 1.0 x 6.0 mm^2
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Pad TPC and Pixel TPC
Particle Track
Pixel: 55x 55 μm^2
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Idea: intermediate solution between pads and pixels for CEPC at Z Clusters contain the primary information of the ionisation Can we find a solution to resolve clusters? Some R&D for pixel TPC:
What is the optimal pad size to – improve double hit and double track resolution – do cluster counting for improved dE/dx? → Pixel size:(200μm or large), significant reduce cost Almost without IBF (Gain< 2000) Micromegas + ASIC Chips (Our option) GEMs + ASIC Chips
→ Some R&D at DESY
CEPC workshop@ Novermber Kees from NIKEF will attend and discuss some possible collaboration.
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TPC prototype R&D Laser dE/dx (蔡一鸣报告) Low consumption ASIC (刘伟报告) Cooperation
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Why we need the laser?
The drift velocity is measured with precision via the signal produced by stray laser light on the aluminised central electrode (by photoelectric effect)
The drift time gradient due to the pressure gradient is observed
ALICE TPC drift velocity update results
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Experimental setup using a laser
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Electronics from Tsinghua Amplifier (READY)
CASAGEM chip 16Chs/chip 4chips/Board Gain: 20mV/fC Shape time: 20ns
DAQ (READY)
FPGA+ADC 4 module/mother board 64Chs/module Sample: 40MHz 1280chs
FEE Electronics and DAQ setup photos
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Preliminary test with the laser
Readout board, 128 Channels electronics, DAQ and laser mirror and PCB board have been done and assembled
TPC barrel mount and re-mount with the Auxiliary brackets
TPC preliminarily tested with 55Fe and the different power laser beam
Optimization of the laser studied
55Fe Laser
55Fe Laser
55Fe Laser
55Fe Laser
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Laser track test@128chs
Preliminary results of Laser tracker energy spectrum and tracker
Drift length: 27mm Pad row#4
Pulse
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International cooperation
LCTPC collaboration group (LCTPC) Singed MOA and joined in LC-TPC collaboration @Dec. 14,2016 CSC funding: PhD Haiyun jiont CEA-Scalay TPC group(6 months) Joint beam test using Micromegas and GEM modules Planned beam test by TPC prototype at DESY in 2020
Beam test in 2019 Beam test in 2016
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Summary and further R&D
Requirements and critical challenges for CEPC: High momentum resolution and position resolution Continuous beam structure and the ~25ns time space
Continuous IBF module for CEPC: Continuous Ion Back Flow supression Key factor: IBF×Gain=5 and leas than (R&D) Low discharge and the good energy spectrum
Prototype with laser calibration for CEPC : It needs very sophisticated calibration in order to reach the desired physics
performance at Z pole run Prototype has been designed with laser (Developed in IHEP and Tsinghua) Test with the TPC module and prototype in 1.0T magnetic field
Low power consumption ASIC chip: FEE electronics and DAQ collaborated with Tsinghua University Less than 5mV per channel
Still, many critical questions and challenges to face
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Thank you for your attention !