a scintillator based muon detector for the linear colliderdpf2004.ucr.edu › talks ›...

A Scintillator Based MuonDetector for the Linear Collider

Paul E. KarchinWayne State University

Department of Physics and Astronomy

Meeting of the Division of Particles and Fields

University of California, RiversideAugust 28, 2004

P. Karchin – A Scintillator Based Muon Detector for the Linear Collider page 1 8/28/2004

Outline

CollaborationOverview

Physics GoalsPrinciple of OperationDetector ChallengesSimulation and Pattern Recognition

Scintillatorextrusion and coating

Fibersclear-WLS splicingWLS/scintillator coupling

Photon DetectionHamamatsu MAPMT calibrationSolid State Devices: GPD, SiPMT

Resistive Plate ChambersConclusions


Scintillator Based Muon Collaboration

Fermilab: Alan Bross, H. Eugene Fisk (Co-contact Person), Kurt Krempetz, Caroline Milstene, Adam Para, Oleg Prokofiev, Ray Stefanski

Northern Illinois University: Gerald Blazey, Dhiman Chakraborty, Alexandre Dychkant, David Hedin, Arthur Maciel

Notre Dame University: Mitchell Wayne

Rice University: P. Padley, M. Matveev, J. Roberts

University of California, Davis: Mani Tripathi, Richard Breedon

University of Texas, Austin: Karol Lang

Wayne State University: Ray Brockhaus, Alfredo Gutierrez, Paul Karchin (Co-contact Person)

http://www-d0.fnal.gov/~maciel/LCD/awg_lcdmu.html


Physics Goals

•high efficiency for muons over wide momentum range

•large suppression of hadron misidentification

•improvement of calorimeter resolution for hadronic jets (“tail catcher”)


Principle of Operationmomentum from central tracking

particle ID from:

penetration of Ecal, Hcal, SC Coil, µFe

matching µ detector track with central track

Ecal & Hcal energy deposition - min. ion. vs. em or hadronic

hadronic shower tail energymeasured by analog µ detector

Tesla Detector


Detector Challengestrade-off of detector cost with physics performance

(photon yield, analog vs. digital, timing …)integration of large, expensive detector sub-system

long term stable operation of inaccessible detector

WHY IS MUON DETECTOR R&DNEEDED?

above challenges have more than one proposed solution

TECHNOLOGY IS CHANGING!


Reconstruction Algorithm Development(C. Milstene, H.E. Fisk)

see talk on Victoria Linear Collider Workshop web page

stepper algorithm takes into account effects of dE/dx and B-field

bbar event inSiD detector

start with tracker

link to muon det.

use HCAL info.


Baseline Scintillator Design

● 1 cm thick scintillator strips in slots between 10 cm thick iron plates

● wavelength shifting (WLS) fiber readout of strip

● clear fiber link between WLS fiber and photodetector

● multi-anode photomultiplier tube opto-electrical conversion


Scintillator Optionscommercially extruded scintillator with Ti02 coating

dedicated HEP extruder (NIU/Fermilab)

tyvek/VM2000 coating


Fiber Splicing R&DFNAL & Notre Dame

WLS Fiber

WLS

Fiber

Clear Fiber1.2 mm Teflon Sleeve

Joint

Thermally Fused Fiber Splice

Dual Heating Blocks Clear Fiber

Fiber – Vacuum Clamps


Splicing Test Results

1.2 mm Fiber Light Transmission 7/22/04

0500

100015002000250030003500

1 2 3 4 5 6 7 8 9 10

Fiber Number

Cou

nts


1.2 mm Fiber Splice Transmission1

00.10.20.30.40.50.60.70.80.9

1 2 3 4 5 6 7 8 9 10Fiber Number

Tran

smis

sion

7/28/04

fiber from reel

light transmission of 1 m long,1.2 mm diameter, clear,straightened fiber

fiber cut and spliced

WLS Fiber –Scintillator

Coupling Tests

1.2 mm WLS Gluing Tests

0

10

20

30

40

50

60

BC60

0 CUR

ED U

NDER

VACU

UM

RTV6

15A/

B 100

/10 C

ENTR

IFUGE

D

RTV6

15A/

B 100

/10 C

ENTR

IFUGE

D

815C

/EPIC

URE

3234

100/1

3

815C

/EPIC

URE

3234

100/1

3 CEN

TRIFU

GED

BC60

0 100

/28BC

600 1

00/28

TACK

AT E

NDS W

ITH 81

5C

TACK

AT E

NDS W

ITH 81

5C

815C

/EPIC

URE

3234

100/1

3 CEN

TRIFU

ZED

815C

/EPIC

URE

3234

100/1

3

BC60

0 PUM

PED

DOWN

BC60

0 PUM

PED

DOWN

Sample

Res

pons

e to

Cs

137

Sour

ce (n

A)

darkfarmiddlenear

Sasha Dychkant

Measurements of 1 m long strip response using a Cs137 source.

~ 15 p.e.s

May 19, 2004


Multi-Anode Photomultiplier Readout

Goals: develop electro-optical readout for scintillator/fiber prototypes calibrate single photo-electron response of MAPMT

Method: fast pulse light emitting diode with clear fiber coupling to MAPMT


Pulse Charge Distribution

1 p.e. 2 p.e.


Alternative Photon Detectors - IGeiger-mode avalanche Photo-Diodearrays (GPD)

Colorado State and aPeak (SBIR)

phase II goal: deliver 10 64-channel GPD’s with automatic quenching circuits to readout 640 WLS fibers______________________________________

Single channel solid state photodetectors can be DIRECTLY CONNECTED to the WLS fiber thus eliminating the need forclear fibers and routing of clear fiber bundles.


Alternative Photon Detectors - IISilicon Photomultiplier / Metal-Resistor-Semiconductor micro-cell (SiPM/MRS)

see Golovin and Saveliev, Nucl. Instr. Meth. A 518 (2004) 560.

1 µm by 1 µm pixels

to be used for CALICE tile-cal and NIU Tail Catcher


Resistive Plate Chamber Option

R&D Program in Italy by CaPiRe Collaboration

RPC µ detector used in BELLE


ConclusionsOptimal design of a scintillator based muon detector requires evaluation of competing hardware technologies for scintillator(extrusion method) and photon detector (MAPMT, GPD, SiPM)

A Fermilab based collaboration is developing a prototype with •TiO2 coated, extruded plastic scintillator•WLS fiber spliced to clear fiber•Hamamatsu MAPMT readout

Only US groups are working on a scintillator based muondetector, but this work currently lacks the funding needed to make a useful comparison with an RPC based detector being developed in Europe.


Supplementary Slides


Average Photo-electron yield with LED Source


Gain Measurement with LED Source


PMT Base and FE Electronics(M. Tripathi)

for 16-channelHamamatsu MAPMT

HV bias network

High speed pre-amps


TDC Readout Interface (M. Tripathi)

high speed readout of LeCroy FERA TDC system

FPGA interface to PC parallel port

ECL-LVDSBoards added

Interface toParallel Port


A Scintillator Based Muon Detector for the Linear ColliderOutlineScintillator Based Muon CollaborationReconstruction Algorithm Development(C. Milstene, H.E. Fisk)Baseline Scintillator DesignScintillator OptionsFiber Splicing R&DSplicing Test ResultsWLS Fiber – Scintillator Coupling TestsMulti-Anode Photomultiplier ReadoutPulse Charge DistributionAlternative Photon Detectors - IAlternative Photon Detectors - IIResistive Plate Chamber OptionAverage Photo-electron yield with LED Source

a scintillator based muon detector for the linear colliderdpf2004.ucr.edu › talks ›...

Documents