HES HKS meeting

HES HKS meeting7/Feb/2011

T.Gogami

今日の朝ごはん@ Quark café

Contents

• New event cut strategy (idea)• Event display for HES side• E01-011 data analysis (トラぺにはないですが )

–データサマリはありますか？

CurrentPre-track cut with TOF counters

1. TDC cut

2. Pattern recognition– Space points

3. Combination of space points– Pre-track– Check corresponding TOF counters with the pre-track

4. Tracking

CurrentPre-track cut with TOF counters

1. TDC cut– e- e+ backgrounds

• ADC and TDC of Cherenkovs and TOF walls• Hit selection with TOFs

2. Pattern recognition– Space points

3. Combination of space points– Pre-track– Check corresponding TOF counters with the pre-track

4. Tracking

Multiplicity of TOF1X and KDC1-1x

Multiplicity of KTOF1X is mostly 1~2

CH2 , 76314 52Cr , 77124

Event cut strategy

• This picture shows only x-layer• x’-layer can be also used

Can be cut

KDC1 KDC2KTOF1X

KTOF2X

Event cut strategyKDC1 KDC2

KTOF1XKTOF2X

• 5~6% of the KDC sensitive region (x-z plane)

2671.61664.5

1499.6

Width = 95.0Width = 75.072.859.4

1220.0

Event cut strategy

Can be cut before pattern recognition

HES event display

HES tracking• EDC1

– Trans– Pattern recognition– Pre link– Cleanup– Left right– Track fit

• EDC2– Trans– Pattern recognition– Left right– Track fit

• • • e_physics

Hit information in EDC1

Hit information in EDC2

• Tracking information• x,x’,y,y’ at Reference plane• EHODO

start

data

HES event display

HESdisp

HESdetectorsEDC

EDC1EDC2 data

ENGINE

dat file

EMACS• makedata.sh

Multiplicity in chambers

22nd Indian-summer school (SNP2010)

CH2 target 52Cr targetmean ~ 6 hit

Multi-hit TDC

mean ~ 2 hit

CH2 target 52Cr targetmean ~ 1 hitmean ~ 1 hit

106layer

6 layer6

HES

HKS

CH2

Event display for HES (CH2)

EDC1

EDC2EHODO1

EHODO2

Track direction

BLACK : Hit wiresBULE : Selected wires

Track direction

Event display for HES (CH2)

ENGINE -> dat -> dat’ -> display

EDC1

EDC2EHODO1

EHODO2

Track direction

BLACK : Hit wiresBULE : Selected wires

Track direction

There’s bug

Event display for HES (CH2)

EDC1

EDC2EHODO1

EHODO2

Track direction

BLACK : Hit wiresBULE : Selected wires

Track direction

52Cr

Event display for HES (52Cr)

EDC1

EDC2EHODO1

EHODO2

Track direction

BLACK : Hit wiresBULE : Selected wires

Track direction

Event display for HES (52Cr)

EDC1

EDC2EHODO1

EHODO2

Track direction

BLACK : Hit wiresBULE : Selected wires

Track direction

Event display for HES (52Cr)

EDC1

EDC2EHODO1

EHODO2

Track direction

BLACK : Hit wiresBULE : Selected wires

Track direction

Get Event display

1. Copy/home/gogami/makeEdisp.sh

2. Execute$ ./makeEdisp.sh

Sample data• 76314 : CH2

• 77124 : 52Cr

bug

Miscount of hit num. per layer

Run IDEvent ID

Total hit

Total hit

11 ? 9 ?

EDC1EDC2

EDC1

EDC1EDC2

EDC2

Haven’t fixed yet

Summary and To do• Summary

– New event cut strategy for HKS (idea)• With TOFs before pattern recognition

– Event display for HES• Cleaner than HKS (multiplicity is less than HKS)• Found a bug in HKS tracking

– Miscount of hit num. per layer in EDC2

• To do– Quantitative results of tracking for each target

• Efficiency– With GEANT , With real data

• Resolution• Rate , multiplicity

– Cut background event which comes from NMR port• Before pattern recognition

– New event cut routine– ADC and TDC correlation of Cherenkovs or TOFs

– E01-011

END

CEBAF center

タバコを吸う場所

Residence facility

元バスケットコート

ここに道が通りました。 他にも色々と変わりました。6Feb2011