Tracking Analysis for beam test T585 CONTENTS ● ● ● ● SETUP MAPPING/ FIBER ALIGNMENT DEAD CHANNEL ANALYSIS – 2D TRACKING ● – P.E. DISTRIBUTION 3D TRACKING ● ● P.E.

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Transcript Tracking Analysis for beam test T585 CONTENTS ● ● ● ● SETUP MAPPING/ FIBER ALIGNMENT DEAD CHANNEL ANALYSIS – 2D TRACKING ● – P.E. DISTRIBUTION 3D TRACKING ● ● P.E.

Tracking Analysis for beam test T585

CONTENTS ● ● ● ● SETUP MAPPING/ FIBER ALIGNMENT DEAD CHANNEL ANALYSIS – – 2D TRACKING ● P.E. DISTRIBUTION 3D TRACKING ● ● P.E. DISTRIBUTION RECONSTRUCTED EVENT

SETUP

BEAM TOFs

#4 47.5 cm #3 #2 32.5 cm #1 7.3 cm -47.5 cm

VLPC channels

● 512 channel per AFE board -> 2048 ch in total

AFE board # 104 # 107

LH Cassette

# 106 # 105

RH Cassette

GAIN CALIBRATION

● Gain is estimated by gaussian fitting

AFE board #106 MCM #1 Channel #1

DEAD CHANNEL

● ●

VLPC dead (estimated by LED run)

– –

AFE board# 104: ? channels # 107: 3 channels

–

# 106: 4 channels

–

# 105: 4 channels “Fiber dead” (estimated by normal run)

–

NOT YET STUDIED....

SIGNAL of SCIFI

Raw signal converted into photo electron after subtracting common mode RUN# 1255 B=0T , Rotation=0deg, w/o diffuser

ANALYSIS

● ● 2D Tracking – – Fiber Alignment P.E. Distribution 3D Tracking – Reconstructed Event

2D TRACKING W VIEW V VIEW

Y

● ● HIT – Fibers over 2.5 p.e.

FITTING – – – – Minimum chi-square fit X view : y position Yx

Yx Xuv Xuw

V view : x position Xuv crossed with X view W view: x position Xuw crossed with W view

X VIEW

X BEAM

#1 #2 #3 #4

MAPPING/ FIBER ALIGNMENT

After correction.....

Fiber # (station 2) Fiber # (station 1)

MAPPING/ FIBER ALIGNMENT

Fiber # (station 2) Fiber # (station 1)

OFFSET

Fiber # (station 1)

TWIST

CROSSING HIT POSITION W VIEW V VIEW

X position Xv

Yx Xv Xw

X VIEW

X position Xw

3D TRACKING

● ● HIT – Fibers of maximum light yield FITTING – Circular fitting #2 #3 #4

BEAM

RECONSTRUCTED EVENT

RUN# 1320 B=1T , Rotation=6deg., w/o diffuser

p

by TOF