MICE VC March 2009Jean-Sebastien GraulichSlide 1 EMR Status o Introduction o News o Detector Design o Simulations o Responsibilities o Plan Jean-Sebastien

MICE VC March 2009

Jean-Sebastien Graulich Slide 1

EMR StatusEMR Status

o Introduction

o News

o Detector Design

o Simulations

o Responsibilities

o Plan

Jean-Sebastien Graulich, Geneva

MICE VC March 2009


IntroductionIntroduction

EMR: Electron Muon RangerEMR: Electron Muon Ranger Aka EMCal/SW

See my presentation at CM23 for general See my presentation at CM23 for general introductionintroduction

http://mice.iit.edu/cm/cm23/agenda/cm23_graulich_emrissues.ppt

Slide 2

ee++

µµ++

MICE VC March 2009


NewsNews

INFN didn’t approve this project Even though MICE has been supported

Gianrossano withdrew Construction responsibility has been

transefered to University of Geneva: Franck Cadoux http://dpnc.unige.ch/photosmembres/cadoux.html

The COMO group (Milano) is still interested in developing the Front-end electronics

MICE VC March 2009


Detector DesignDetector Design

Latest design used triangular shape (a la Latest design used triangular shape (a la Minerva)Minerva)

Base: 33mm, height:17 mm (nominal), Length: ~ 1 m

59 bars per layer 40 layers Total thickness: 680 mm

MICE CM January 2009 Jean-Sébastien Graulich Slide 4

Total: 2360 channels

MICE VC March 2009


Detector Design

We have reconsidered: Use of MultiAnode PMTs <-> Silicon PMT

Conclusion: Only the convention MAPM solution is compatible with a delivery in spring 2010

Use of Last dynode signal for charge measurement in FADC (layer by layer)

Conclusion: the poor signal quality makes this solution too risky. The bars have fibers coming out from both sides:

Side A : Individual signals to digital electronicsSide B : Fibers bunched per layer

-> 1” conventional PMT ->

Analog electronics

Mechanical Assembly Conclusion: Still under discussion

Number of Layers Need simulation

MICE VC March 2009


Mechanical Assembly

Franck Cadoux, Mechanical Engineer, Geneva, is in charge

A prototype is needed A visit to Trieste is scheduled for next week Brainstorming has started and new ideas

will be discussed Individual bar fixation is considered As opposed to clamped plans proposed by Trieste

earlier

Fiber gluing to be outsourced Main worry is QA of fiber

connections to MAPMT

MICE VC March 2009


SimulationsSimulations

Aim atAim at Validate the total length (number of layers)Validate the total length (number of layers) Estimate the resolution in Estimate the resolution in PPzz obtained obtained from the range from the range

measurementmeasurement At a later stage, optimize PID…At a later stage, optimize PID…

Run by Vassil VerguilovRun by Vassil Verguilov Muons starting before TOF2, KL includedMuons starting before TOF2, KL included Parallel beam, small beam spotParallel beam, small beam spot Flat initial momentum distributionFlat initial momentum distribution No X-Y segmentation yetNo X-Y segmentation yet

Slide 7

MICE VC March 2009


EMR Simulation

Las

t la

yer

reac

hed Muons above

270 MeV/c are not stopped

Range as a function of momentum

MICE VC March 2009


EMR Simulation

Same as before; profile plotL

ast

laye

r re

ach

ed Approx. Lineardependence, as expected

~ ¼ layer per MeV/c

MICE VC March 2009


EMR Simulation

Straggling and Pz Resolution

Stopping in Layer 15

Co

un

ts p

er m

om

entu

m b

in

Momentum at TOF2 (MeV/c)




MICE VC March 2009


EMR Simulation

We obtain Pz Resolution estimate:

Pz ~ 4.2 MeV/cSimilar to nominal Tracker (3.9 MeV/c)BUT

This is for PT = 0

Where the actual tracker resolution is very poor:

Pz > 20 Mev/c if PT <5MeV/c

To be continued

MICE VC March 2009


ResponsibilitiesResponsibilities Geneva Geneva

Construction and assemblyConstruction and assembly 1” PMTs and Analog electronics (FADCs)1” PMTs and Analog electronics (FADCs) High Voltage for MAPMHigh Voltage for MAPM ~ 15 MAPM~ 15 MAPM WaveLength Shifter fibers (we will seek help fromWaveLength Shifter fibers (we will seek help from

Japanese colleagues)Japanese colleagues) High Voltage for 1” PMTs ?High Voltage for 1” PMTs ?

Como/MilanoComo/Milano Electronics developmentElectronics development Test in beamTest in beam

TriesteTrieste ~ 20 MAPMs~ 20 MAPMs WLS Fibers for the prototypeWLS Fibers for the prototype Fiber gluing technique (task to be outsourced)Fiber gluing technique (task to be outsourced)

FermilabFermilab Production of the scintillator bars Production of the scintillator bars

MICE VC March 2009


PlanPlan

The aim is to have the detector ready for The aim is to have the detector ready for MICE in first quarter of 2010MICE in first quarter of 2010

Some experience is required before we Some experience is required before we can have the full understanding of time can have the full understanding of time scalesscales

There will be two prototypesThere will be two prototypes Existing, small size, with square bars will be tested Existing, small size, with square bars will be tested

at CERN this spring or early summer, with final at CERN this spring or early summer, with final electronics and PMTs. Could be brought to MICE for electronics and PMTs. Could be brought to MICE for integrationintegrationtest in fall 2009.test in fall 2009.

A double plane (x-y), full size, with triangular bars A double plane (x-y), full size, with triangular bars will be studied/assembled in Geneva in order to will be studied/assembled in Geneva in order to establish the construction principles.establish the construction principles.

MICE VC March 2009


The EMR groupThe EMR group

Trieste INFN and Trieste University- Physics Trieste INFN and Trieste University- Physics DepartmentDepartmentErik Vallazza, Erik Vallazza, Como Univ. and INFN-MiBComo Univ. and INFN-MiB

Michela Prest, Valerio MascagnaMichela Prest, Valerio Mascagna

Michela’s Boys&Girls: Andrea, Daniela, Davide, SaidMichela’s Boys&Girls: Andrea, Daniela, Davide, Said University of GenevaUniversity of Geneva

Alain Blondel, Vassil Verguilov, J.S. Graulich, Alain Blondel, Vassil Verguilov, J.S. Graulich, Franck Cadoux, Florian MasciocchiFranck Cadoux, Florian Masciocchi

FNALFNAL

Documents

MICE VC March 2009Jean-Sebastien GraulichSlide 1 EMR Status o Introduction o News o Detector Design o Simulations o Responsibilities o Plan Jean-Sebastien