HLAB meeting25 Jan 2011

T.Gogami

E05-115 experimental setup in JLab Hall C (2009)

Contents

• Whole analysis status• Tracking status– Multiplicity– Rate– Tracking analysis outlook

• Event display

Whole status about analysis• Kawama

– Matrix • Gogami

– Tracking– e,e+ background

• Doi– Tracking– Elementary

• Chiba– Cherenkov counters

• Nagao– decay pion experiment

• Hirose– New TOF wall for KaOS E05-115 experiment setup in JLab Hall C (2009)

e + p --> e + K+ + Λ

e e

uud

ussud

–pK+

Λ

γ*

Tracking status

KDC wire configuration

K+

zy

x

uu’xx’

vv’

30°

150°

90°

y

x

Drift chambers in HKS

Multiplicity

Multiplicity is higher for heavy target

KDC wire configuration

K+

zy

x

uu’xx’

vv’ CH2 , 2.0 [μA]

52Cr , 7.6 [μA]

Multiplicity distributiony

x

Number of tracks

Tracking efficiency is lower.Tracking eff. = 80% (Multiplicity = 5 )

TOP view TOP view

KDC1

Black : hit wires Blue : selected wiresRed : track

Black : hit wires Blue : selected wiresRed : track

CH252Cr

Multiplicity for each layerTarget Run Number Beam [μA] Multi

KDC1-x (@PR)

Multi KDC1-x(@N)Thickness [mg/cm2]

CH2 450.0 76314 2.0 2.92 2.72

H2O 500.0 75972 2.7 5.75 4.937Li 184.0 76220 32.0 4.26 3.85

9Be 188.1 76607 38.4 4.73 4.1610B 56.1 76184 42.4 2.52 2.4612C 112.5 76077 38.8 4.42 4.12

52Cr 154.0 77124 7.6 6.42 5.14

Singles rate summary target, Run #, currentWater 75930 2.8Carbon 75954 35Cr 76000 8.0Carbon 76051 10Carbon 76080 40Boron 76150 40Boron 76180 45Lithium 76235 35CH2 76320 2.0Be9 76590 40Cr 76700 7.5Carbon 76830 20

Rate dependence

• Multiplicity : linear dependence with rate• Residual : quadratic dependence with rate

e , e+ background in GEANT simulation

• Generated particle : e+

• Distribution : spherical uniform• Momentum : 860 – 1000 [MeV/c]• Angle : 0 – 2 [mrad]• 1000 events

Vacuum chamber(sus304)

NMR port(sus304)

KDC1 KDC2 e- , e+

Trying to reduce these multiplicity for tracking

• Optimization of e-,e+ background suppression– ADC , TDC distribution– HES hodoscopes information– Pre-cut with TOF counters• Optimization of cut parameters

Event display

Previous display

Hit events in KDC which can make tracks could be seen.

Track

KDC1

KDC2

KTOF1X

HKS tracking

• Trans_scin• Trans_dc• Track• Select_good_track• Link_tracks• H_physics

• Total hit in KDC• Hit layer and wire• Multiplicity for each layer• Etc.

• Number of tracks• x,xp,y,yp at reference plane• Selected wires• Layer• residual , chi2• Momentum• KTOF,AC,WC

ntuple

start

data

HKS event display

HKSdisp

HKSdetectorsKDC

KDC1KDC2

KDC_2d

data

ENGINE

dat file

Select data

EMACS

start・・・・・・・・datastart・・・・・・start・・・・・・・・data・・・

Select

start・・・・・・・・datastart・・・・・・・・datastart・・・・・・・・data・・・・

selectdata.sh

Load selectdata.el functions

data/selectdata.sh

data/selectdata.el

Emacs lisp

lisp? 知りません• Emacs なら知らなくても OK

1. 今からやる事を覚えてください C-x (2. 何かする3. 覚えてほしいのはここまでです C-x )4. 今覚えたキーボードマクロに名前を付けたいです M-x name-last-kbd-

macro5. そのマクロを Lisp コードとしてバッファに挿入してください M-x insert-

kbd-macro

自動で lisp で書いてくれる !便利.emacs に記録すればいつでも使える

HKS event display

HKSdisp

HKSdetectorsKDC

KDC1KDC2

KDC_2d

data

ENGINE

dat file dat file

EMACS• makedata.sh

KDC1

• KDC1– KDC1.cc– KDC1.in• Parameters

– README.txt– Makefile– pict/

Black : hit wiresBlue : Selected wiresRes : Tracks

KDC1(RUN 77124)

KDC2 is similar to KDC1

KDC

• KDC– KDC.cc– KDC.in

• parameters

– README.txt– Makefile– pict/

KDC_2d

• KDC_2d– KDC_2d.cc– KDC_2d.hh– KDC_2d.in• parameters

– README.txt– Makefile– pict/

HKSdetectors

• HKSdetectors– HKSdet.cc– HKSdet.in

• parameters

– README.txt– Makefile– pict/

Easy to get the code

• /home/gogami/– makeKdisp.sh

>>./makeKdisp.sh

makeKdisp.sh

README.txt

Select data

EMACS

start・・・・・・・・datastart・・・・・・start・・・・・・・・data・・・

Select

start・・・・・・・・datastart・・・・・・・・datastart・・・・・・・・data・・・・

Select data

EMACS

start・・・・・・・・datastart・・・・・・start・・・・・・・・data・・・

Select

start・・・・・・・・datastart・・・・・・・・datastart・・・・・・・・data・・・・

• CH2(76314)• Track : 26.8%

• 52Cr(77124)• Track : 3.6%

***_trash.dat

• Hit on the two chambers• Required number of hit wires• Tracking χ2

• ・・・

CH2

KDC1

KDC2

52Cr

KDC1

KDC2

Summary• Whole analysis status– Doing our best !

• Tracking status– Mean multiplicity is up to ~6.5 on the HKS chambers – Rate is up to ~30 [MHz] on the HKS chambers– Need optimal cut of e-,e+ background

• Event display– Can see rough states of the tracking visually

• HES HKS collaboration meeting , JLab– 2011/Feb/24 ~ 2011/Feb/25

• KaOS meeting , Mainz– 2011/Mar/17

• JPS , Nigata– 2011/Mar/25 ~ 2011/Mar/28

予定

END

Residual for each target52Cr ,77124σ≈372 [μm]

12C ,76077σ≈218 [μm]

10B ,76184σ≈161 [μm]

9Be ,76607σ≈214 [μm]

7Li ,76220σ≈181 [μm]

H2O ,75972σ≈337 [μm]

CH2 ,76314σ≈155 [μm]

Things to do for the collaboration meeting and JPS

• Quality of Tracking for each target (especially for CH2 and H2O)– Efficiency

• Real data• With MC simulation

– Spending time for each section in the code– Optimization of e-,e+ background suppression

• ADC , TDC distribution• HES hodoscopes information• Pre-cut with TOF counters

– Optimization of cut parameters

– Multi-track events

• Matrix– Kawama-san’s code– Simple code

覚書• 出張準備

– 保険– ESTA ($14)

• 申請から OK が出るまで数分– パスポート

• 忘れないように• 集中講義

– ¾ 終了– レポート ( 提出済 )– 今週 1/26( 水 ) – 1/28( 金 )

• 講師 : 佐々木修 , “ 素粒子・原子核の実験のための電子回路”• TA

– アメリカ出発までに !• ミニテスト集計• 中間テスト採点• レポート採点

Tracking in HKS (pattern recognition)

• Make combination of hit wire belong to one space point for tracking

• pre tracking

1. Test point2. Space point

x

y

x

y

• pre track with space points– single hit in KTOF– multi hit in KTOF

• start time calculation for drift time of chambers• correction (card)

Pre track and

See corresponding TOF counters

Not enough

CH2 target

52Cr target Need to improve tracking code

K+

KDC1

KDC2

KTOF1X

Now developing

Current analyzer cannot handle

with high multiplicity data

1. input tracks in simulation ==> output file (hit wire info and so on)

2. input this file to real analyzer

3. see output tracks and compare to input tracks

Simulation for HKS tracking efficiency (by D.Doi)

one result of this simulation

e,e+ b.g. in HKSTOP view

Side view

X [cm]

X’ [r

ad]

5 × 5 [cm2]

HKS - DHKS - Q

HKS detectors

Strangeness 2010 at KEK

K+

p, π+

Drift chambers-KDC1,KDC2-TOF walls -2X,1Y,1X-

(Plastic scintillators)

Cherenkov detectors -AC,WC-• Aerogel (n=1.05)• Water (n=1.33)

1 [m] June 2009 in JLab Hall-C

HKS trigger• CP = 1X ×1Y × 2X • K = WC × AC

CP × K

~18 [kHz](8 [μA] on 52Cr)

−π+

K+

p

σ ≈ 250 [μm]TOF σ ≈ 170 [ps]

Strangeness 2010 at KEK

HES Detectors

Drift chambers- EDC1 , EDC2 -

TOF walls - EH1 , EH2 - (Plastic scintillators)

HES D magnet

HES triggerEH1 × EH2

~2 [MHz](8 [μA] on 52Cr)e

Time Of Flight

σ ~ 300 [ps]

Target Hypernucleus Thickness[mg/cm2]

Beam Typical rateHES/HKS/COIN

[kHz]Current [μA] Total charge[C]

7Li 7He 184.0 32.0 4.84 2000 / 7 / 0.9

9Be 9Li 188.1 38.3 5.33 2400 / 9 / 1.6

10B 10Be 56.1 38.7 6.25 1300 / 1 / 0.1

12C 12B 112.5 26.8 5.90 1200 / 5 / 1.0

52Cr 52V 134.0154.0

7.6 0.835.53

2000 / 17 / 1.8

Data summary

22nd Indian-summer school (SNP2010)

Λ

Λ

Λ

Λ

Λ

E05-115 ( 2009 Aug – Nov )

Target Hypernucleus Thickness[mg/cm2]

Beam

Current[μA] Total charge[C]

CH2 Λ , Σ0 450.8 2.0 0.28

H2O Λ , Σ0 ~500.0 2.7 0.20

Physics Data

Calibration Data

(@36μA)