Muon Detector Options for CEPC Liang Li Shanghai Jiao Tong - - PowerPoint PPT Presentation

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Muon Detector Options for CEPC Liang Li Shanghai Jiao Tong - - PowerPoint PPT Presentation

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International Workshop on High International Workshop on High Energy Circular Electron Positron Energy Circular Electron Positron Collider Collider Muon Detector Options for CEPC Liang Li Shanghai Jiao Tong University Nov 7 th , 2017 1

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International Workshop on High Energy Circular Electron Positron Collider Nov 7th , 2017

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International Workshop on High Energy Circular Electron Positron Collider International Workshop on High Energy Circular Electron Positron Collider

Muon Detector Options for CEPC

Liang Li

Shanghai Jiao Tong University

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International Workshop on High Energy Circular Electron Positron Collider Nov 7th , 2017

Muon System Overview Muon System Overview

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Structure:

  • Between magnet iron yoke, outside HCAL
  • Cylindrical barrel & two endcap system
  • Solid angle coverage: 0.98 * 4

Technology:

  • Bakelite/glass RPC as baseline
  • Many other options in consideration
  • μRWell
  • Micromegas, GEM
  • MDT, Scintillator Strip
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International Workshop on High Energy Circular Electron Positron Collider Nov 7th , 2017

Baseline Design Baseline Design

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International Workshop on High Energy Circular Electron Positron Collider Nov 7th , 2017

Baseline Design Baseline Design

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International Workshop on High Energy Circular Electron Positron Collider Nov 7th , 2017

Baseline Design Baseline Design

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Resistive Plate Chamber (RPC)

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International Workshop on High Energy Circular Electron Positron Collider Nov 7th , 2017

Baseline Design Baseline Design

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Signal efficiency > 95% for muon pT > 4 GeV with 8 layers  Low cost, easy construction  Position resolution: 5-10 mm  Time resolution: ~ 1 ns Resistive Plate Chamber (RPC)

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Other Options Other Options

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Other Options Other Options

Micro-RWell technology

  • MPGD with two PCBs: a standard GEM

Drift cathode PCB and a μRWell PCB

  • Amplification stage couples directly

with readout: low/high rate option

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International Workshop on High Energy Circular Electron Positron Collider Nov 7th , 2017

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Other Options Other Options

Micro-RWell technology

  • MPGD with two PCBs: a standard GEM

Drift cathode PCB and a μRWell PCB

  • Amplification stage couples directly

with readout: low/high rate option

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International Workshop on High Energy Circular Electron Positron Collider Nov 7th , 2017

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Other Options Other Options

Micro-RWell technology

  • MPGD with two PCBs: a standard GEM

Drift cathode PCB and a μRWell PCB

  • Amplification stage couples directly

with readout: low/high rate option

 Much simpler than many other MPGDs, such as GEMs or MicroMegas  Rate capability: a few tens of KHz/cm2  Position resolution: ~60 μm  Time resolution: 5-6 ns

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International Workshop on High Energy Circular Electron Positron Collider Nov 7th , 2017

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Other Options Other Options

Micro-RWell technology

  • MPGD with two PCBs: a standard GEM

Drift cathode PCB and a μRWell PCB

  • Amplification stage couples directly

with readout: low/high rate option

 Much simpler than many other MPGDs, such as GEMs or MicroMegas  Rate capability: a few tens of KHz/cm2  Position resolution: ~60 μm  Time resolution: 5-6 ns

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Other Options Other Options

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Other Options Other Options

Micro Mesh Gaseous Structure (Micromegas)

A planar drift electrode, a gas gap of a few millimeters thickness as conversion and drift region, and a thin metallic mesh typically 100–150 μm distance from the readout electrode as the amplification region.

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Other Options Other Options

Micro Mesh Gaseous Structure (Micromegas)

A planar drift electrode, a gas gap of a few millimeters thickness as conversion and drift region, and a thin metallic mesh typically 100–150 μm distance from the readout electrode as the amplification region.

  • Good spatial resolution < 100 μm, time resolution ~ 10ns
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International Workshop on High Energy Circular Electron Positron Collider Nov 7th , 2017

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Other Options Other Options

Micro Mesh Gaseous Structure (Micromegas)

A planar drift electrode, a gas gap of a few millimeters thickness as conversion and drift region, and a thin metallic mesh typically 100–150 μm distance from the readout electrode as the amplification region.

  • Good spatial resolution < 100 μm, time resolution ~ 10ns
  • High rate capability: ~10MHz/cm2
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Other Options Other Options

Micro Mesh Gaseous Structure (Micromegas)

A planar drift electrode, a gas gap of a few millimeters thickness as conversion and drift region, and a thin metallic mesh typically 100–150 μm distance from the readout electrode as the amplification region.

  • Good spatial resolution < 100 μm, time resolution ~ 10ns
  • High rate capability: ~10MHz/cm2
  • Vulnerability to sparking
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International Workshop on High Energy Circular Electron Positron Collider Nov 7th , 2017

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Other Options Other Options

Micro Mesh Gaseous Structure (Micromegas)

A planar drift electrode, a gas gap of a few millimeters thickness as conversion and drift region, and a thin metallic mesh typically 100–150 μm distance from the readout electrode as the amplification region.

  • Good spatial resolution < 100 μm, time resolution ~ 10ns
  • High rate capability: ~10MHz/cm2
  • Vulnerability to sparking
  • Large active area (104m2) Micromegas still under development
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Other Options Other Options

Gas Electron Multiplier (GEM) technology

  • Gaseous ionization detector using copper-clad Kapton foil (50-70 μm

thick) with etched holes (30-50 μm diameter) for gas amplification.

  • Very good spatial resolution ~ diameter, time resolution ~10-20ns
  • High rate capability: ~10MHz/cm2
  • Vulnerability to sparking
  • Complexity of assembly procedure: stretching and gluing GEM foils
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Other Options Other Options

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Other Options Other Options

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Other Options Other Options

Monitored Drift Tube (MDT) technology

  • Wire chamber: an anode wire at center of tube and a metallic

cathode (aluminum) with gas in between

  • Good spatial resolution ~ 80μm , good time resolution ~10ns
  • Rate capability: ~500Hz/cm2
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Other Options Other Options

Monitored Drift Tube (MDT) technology

  • Wire chamber: an anode wire at center of tube and a metallic

cathode (aluminum) with gas in between

  • Good spatial resolution ~ 80μm , good time resolution ~10ns
  • Rate capability: ~500Hz/cm2

Scintillator Strips technology

  • Plastic scintillator material can be extruded into strips longer than

5 m. Use wave-length shifting (WLS) fibers to shift the light spectrum to match the response of Si photo-diodes (SiPM) or multi pixel photo counters (MPPC)

  • Construct compact and rigid modules with 1-D or 2D readout strip

arrays

  • Spatial resolution ~ 3 cm, time resolution < 1 ns
  • Extrusion techniques with massive production required
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Muon ID Performance: PFA Calorimeter Muon ID Performance: PFA Calorimeter

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Muon ID Performance: PFA Calorimeter Muon ID Performance: PFA Calorimeter

CEPC work in progress

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Muon ID Performance: PFA Calorimeter Muon ID Performance: PFA Calorimeter

From Manqi

CEPC work in progress

CEPC work in progress

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Muon ID Performance: PFA Calorimeter Muon ID Performance: PFA Calorimeter

  • PFA has done a terrific job in terms of Lepton ID
  • No significant degradation for E > 2 GeV charged particles

From Manqi

CEPC work in progress

CEPC work in progress

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Muon Detector as TCMT Muon Detector as TCMT

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Muon Detector as TCMT Muon Detector as TCMT

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Muon Detector as TCMT Muon Detector as TCMT

Muon system as an add-on

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Muon Detector as TCMT Muon Detector as TCMT

Muon system as an add-on

  • Simulation study with built-in calorimeter / TCMT geometry,

also integrated with yoke and magnet system

  • Complementary to Calorimeter
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Muon Detector as TCMT Muon Detector as TCMT

Muon system as an add-on

  • Simulation study with built-in calorimeter / TCMT geometry,

also integrated with yoke and magnet system

  • Complementary to Calorimeter
  • Effect as a tail catcher / muon tracker (TCMT)

JER with/wo TCMT

  • Study ongoing
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Muon Detector as TCMT Muon Detector as TCMT

Muon system as an add-on

  • Simulation study with built-in calorimeter / TCMT geometry,

also integrated with yoke and magnet system

  • Complementary to Calorimeter
  • Effect as a tail catcher / muon tracker (TCMT)

JER with/wo TCMT

  • Study ongoing
  • Preliminary test with fast simulation: the level of

improvement depends on the energy deposited in the muon detector, ranging from 1% (energy compensation ~ 1GeV) to 8% (energy compensation ~ 10GeV or more)

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Future R&D Future R&D

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Future R&D Future R&D

 Long-lived particles optimization: explore new physics scenario of long-lived particles and exotic

  • decays. Optimize detector parameters and

technologies.

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Future R&D Future R&D

 Long-lived particles optimization: explore new physics scenario of long-lived particles and exotic

  • decays. Optimize detector parameters and

technologies.  Layout and geometry optimization: detailed studies

  • n the structure of the segments and modules. The

geometry and dimensions need to be optimized together with the inner detectors, in particular the ECAL and the HCAL.

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International Workshop on High Energy Circular Electron Positron Collider Nov 7th , 2017 10

Future R&D Future R&D

 Long-lived particles optimization: explore new physics scenario of long-lived particles and exotic

  • decays. Optimize detector parameters and

technologies.  Layout and geometry optimization: detailed studies

  • n the structure of the segments and modules. The

geometry and dimensions need to be optimized together with the inner detectors, in particular the ECAL and the HCAL.  Gas detectors: Study aging effects, improve long-term reliability and stability.

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International Workshop on High Energy Circular Electron Positron Collider Nov 7th , 2017 10

Future R&D Future R&D

 Long-lived particles optimization: explore new physics scenario of long-lived particles and exotic

  • decays. Optimize detector parameters and

technologies.  Layout and geometry optimization: detailed studies

  • n the structure of the segments and modules. The

geometry and dimensions need to be optimized together with the inner detectors, in particular the ECAL and the HCAL.  Gas detectors: Study aging effects, improve long-term reliability and stability. All detectors: Improve massive and large area production procedures and readout technologies.

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Summary Summary

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Summary Summary

 Muon detector baseline design with RPC.

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International Workshop on High Energy Circular Electron Positron Collider Nov 7th , 2017 11

Summary Summary

 Muon detector baseline design with RPC.  Survey of various detector options.

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International Workshop on High Energy Circular Electron Positron Collider Nov 7th , 2017 11

Summary Summary

 Muon detector baseline design with RPC.  Survey of various detector options.  Lots of R&D to be done.

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International Workshop on High Energy Circular Electron Positron Collider Nov 7th , 2017 11

Summary Summary

 Muon detector baseline design with RPC.  Survey of various detector options.  Lots of R&D to be done.  International/domestic collaboration welcome.