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The momentum measurement of 2ry particle

emitted from neutrino interaction

DONUT Meeting @FNALDEC 10th-11th

B.D.Park, S.Takahashi and T.Furukawa

Nagoya univ. @ JAPAN

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Contents

1. Criterion of primary track & how many tracks picked up by the condition

2. The distribution of RMS for High-Energy tracks after Fine-Alignment

3. Scattering distribution

4. Momentum measured ratio as a function of the slope in each module

5. Measured momentum vs. Limit & Momentum measurement error

6. Measured momentum vs. Spectrometer data (μ)

7. Data summary

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Criterion of primary track and picked up the track

  1. should start from vertex point or downstream plate of vertex point

2. consist of segments more than 3 segments (as track definition)

3. Impact parameter less than 5μm

=> Number of tracks / Number of events 634 / 168

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Number of tracks vs. IP

IP < 5μm

192 tracks

μm

Nu

mb

er

of

track

Large slope &

a low PH

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RMS for High-Energy tracks after Fine-Alignment

Entries 12013

RMS(x) 0.1198

RMS(y) 0.1233

Entries 3367

RMS(x) 0.0655

RMS(y) 0.0637

μm μm

μm μm

For all module

For Module 1

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RMS for High-Energy tracks after Fine-Alignment

Entries 1259

RMS(x) 0.1453

RMS(y) 0.1486

Entries 3134

RMS(x) 0.1010

RMS(y) 0.1093

μm μm

μm μm

For Module 2

For Module 3

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RMS for High-Energy tracks after Fine-Alignment

Entries 857

RMS(x) 0.0941

RMS(y) 0.1082

Entries 499

RMS(x) 0.1128

RMS(y) 0.1041

μm μm

μm μm

For Module 4

For Module 5

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RMS for High-Energy tracks after Fine-Alignment

Entries 2734

RMS(x) 0.1025

RMS(y) 0.1059

Entries 163

RMS(x) 0.0760

RMS(y) 0.0664

μm μm

μm μm

For Module 7

For Module 8

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Scattering distribution

Bulk

Entries 1049

ECC 200

Entries 985

ECC 800

Entries 495

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Momentum measured ratio as a function of the slope

tan θ

Nu

mb

er

of

track

Pro

bab

ili

ty

Entries 491

measured track

tried track

tan θ

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Momentum measured ratio as a function of the slope

Entries 75

Entries 88

Entries 91

Entries 59

12

Momentum measured ratio as a function of the slope

Entries 30

Entries 130

Entries 18

13

In each module

Entries 69

Entries 66

Entries 48

Entries 26

14

In each module

Entries 19

Entries 88

Entries 8

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Measured momentum vs. Limit (Limit : maximum detectable momentum)

entries 290 (P < Limit)

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Momentum measurement error

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Measured momentum vs. Limit (Limit : maximum detectable momentum)

entries 66 (P < Limit)

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Momentum measurement error

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Measured momentum vs. Limit (Limit : maximum detectable momentum)

entries 34 (P < Limit)

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Momentum measurement error

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Measured momentum vs. Limit (Limit : maximum detectable momentum)

Entries 62 (P < Limit)

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Momentum measurement error

23

Measured momentum vs. Limit (Limit : maximum detectable momentum)

entries 25 (P < Limit)

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Momentum measurement error

25

Measured momentum vs. Limit (Limit : maximum detectable momentum)

entries 16 (P < Limit)

26

Momentum measurement error

27

Measured momentum vs. Limit (Limit : maximum detectable momentum)

entries 83 (P < Limit)

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Momentum measurement error

29

Measured momentum vs. Limit (Limit : maximum detectable momentum)

entries 4 (P < Limit)

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Momentum measurement error

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Measured momentum vs. Spectrometer (μ)

14 track

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Summary Ⅰ-1

368 Number of Measured tracks

47 Too short tracks

90 Not enough plate ( below the plate#10)

3 No Track

2 No map file

124 Not good alignment

(RMS for High-Energy tracks after Fine-Align less than 1μm)

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Summary Ⅰ- 2

Total Good alignment

Bad connection

Bad alignment

Bad connection

Bad alignment

Bad connection

Need to

scan

Slip Module

4 1 3 0 0 0 1

22 1 10 0 9 2 2

20 13 1 0 6 0 3

32 0 13 10 3 6 4

7 2 2 0 3 0 5

28 18 7 0 3 0 7

11 0 11 0 0 0 8

124 35 47 10 24 8 Total

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Summary Ⅱ

Measured track Tried track Total track Rate (%) Module

71 75 108 94.67 1

66 88 125 75.00 2

71 91 115 78.02 3

27 59 72 45.76 4

23 30 40 76.67 5

102 130 150 78.46 7

8 18 24 44.44 8

Total 368 491 634 74.95