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TOF Software and Analysis Tools

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TOF Software and Analysis Tools

MICE CM22, Rutherford Appleton Laboratory

Sunday 19 October 2008

Mark Rayner

G4MICE

Analysis

Tools

Particle ID

G4MICE

Reconstruction

Calibration

Real Data

G4MICE

Simulation

Momentum spectra

for KEK data

Time in Tracker

Reference Plane

Reconstruction of

the angles x’ and y’

Measurement of

emittance

Longitudinal

momentum in TRP

Analysis Applications

Measurement of

optical parameters

Reconstruction

of RF Phase

TofTrack

Average muon momentum between TOFs

TofSpacePoints

Muon time and position in each TOF

Hit time in scintillator slabs

TofSlabHits

TofDigits

Time and signal in each PMT

DATE

Digitization

KEK data

Simulation

GVA data

2

Tracker

5x5 TOF counter

T1 timing counter

Aerogels

- KEK tracker test timing detectors
- 250 MeV/c e+, m+ and p+
- Assume e+ are ultra-relativistic

- The MICE TOFs
- KEK method not practical
- Laser injection to slab centre

G4MICE

Analysis

Tools

Particle ID

G4MICE

Reconstruction

Calibration

Real Data

G4MICE

Simulation

Momentum spectra

for KEK data

Time in Tracker

Reference Plane

Reconstruction of

the angles x’ and y’

Measurement of

emittance

Longitudinal

momentum in TRP

Analysis Applications

Measurement of

optical parameters

Reconstruction

of RF Phase

TofTrack

Average muon momentum between TOFs

TofSpacePoints

Muon time and position in each TOF

Hit time in scintillator slabs

TofSlabHits

TofDigits

Time and signal in each PMT

DATE

Digitization

KEK data

Simulation

GVA data

4

m+

p+

p [MeV/c]

p [MeV/c]

Before

TOF0

After

TOF1

pTofTrack – pTruth [MeV/c]

- KEK tracker test data
- The Geneva counters
- Expected performance of the MICE TOFs

G4MICE

Analysis

Tools

Particle ID

G4MICE

Reconstruction

Calibration

Real Data

G4MICE

Simulation

Momentum spectra

for KEK data

Time in Tracker

Reference Plane

Reconstruction of

the angles x’ and y’

Measurement of

emittance

Longitudinal

momentum in TRP

Analysis Applications

Measurement of

optical parameters

Reconstruction

of RF Phase

TofTrack

Average muon momentum between TOFs

TofSpacePoints

Muon time and position in each TOF

Hit time in scintillator slabs

TofSlabHits

TofDigits

Time and signal in each PMT

DATE

Digitization

KEK data

Simulation

GVA data

6

Effective phase advance W [rad]

Effective focusing strength k [m-2]

Effective length l [m]

150

MeV/c

150

300

Defocusing

200

300

250

150

300

300

Focusing

150

Central quadrupole gradient [T/m]

–g08

T/m

M21 [m-1]

TOF0

TOF1

TOF0

TOF1

g09

g07 [T/m]

dx/dz

g07 [T/m]

x [mm]

- Use the quadrupole parameterization and linear beam optics to select ideal quadrupole gradients for the measurement of x’=dx/dz
- Verify with G4MICE simulations

Reconstructed x’

Total error

Error on x’

[radians]

Due to Cherenkov

Due to timing error

Due to tracking error

True x’

Due to position error

Amplitude [mm]

G4MICE

reconstruction

of trace space

using simulated

TOF hits

True trace space

distribution

at TOF1

dx/dz

x [mm]

No Cherenkov

Muon

Photon

TOF1

& cage

Focus coil

RF

Tracker Solenoid 1

Electron

H2

absorber

Tracker 1

- Extrapolate to tracker reference plane for longitudinal emittance
- Extrapolate to RF to measure phase and define a bunched beam
- Work in progress
- Possible methods
- Geant4 style stepping algorithm
- Transfer matrix style Taylor expansion
- Kalman filter

G4MICE

Analysis

Tools

Particle ID

G4MICE

Reconstruction

Calibration

Real Data

G4MICE

Simulation

Momentum spectra

for KEK data

Time in Tracker

Reference Plane

Reconstruction of

the angles x’ and y’

Measurement of

emittance

Longitudinal

momentum in TRP

Analysis Applications

Measurement of

optical parameters

Reconstruction

of RF Phase

TofTrack

Average muon momentum between TOFs

TofSpacePoints

Muon time and position in each TOF

Hit time in scintillator slabs

TofSlabHits

TofDigits

Time and signal in each PMT

DATE

Digitization

KEK data

Simulation

GVA data

11