HES HKS meeting

HES HKS meeting1 Nov 2010T.Gogami

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

Content

• HKS GEANT– Vacuum extension– VE flange– NMR port

Real data

76314CH2 target

Readiness review (Fig.26)

Added vacuum extension & NMR port

sus304(Cr 18 , Ni 8)

Added vacuum extension & NMR port

NMR Port

Vacuum extension flange

Vacuum extension side

Real data

PortKDC1

KDC2

KDC1

KDC2

Extension chamber76314 , CH2

port , flange

vacuum chamber side

3000 events

20%2%

POSITRON simulation

• How to usehttp://lambda.phys.tohoku.ac.jp/~

gogami/HES-HKS/POSI_sim2010/howto.pdf

• report– http://lambda.phys.tohoku.ac.jp/~gogami/posi.htm

Summary and to do• Summary

– HKS GEANT• vacuum chamber

– its side ==> ee+• flange of vacuum chamber

– ee+ , main• NMR port

– ee+ , main

• To do– ee+ background

• reconstruct real xx’ distribution with simulation• rejection code

– Residual of chambers for each arm.– HES tracking

End負

勝

勝Strangers vs. parabolic

2 : 1

2010/10/27 12:00-

11/04(Thu) 12:00- vs. AXIOM (BBBD)11/05(Fri) 12:00- vs. Ten-Ten-Ten-Mon-Mon-Mon (ABCC)

Strangers (ABBD)

backup

Target thickness dependence

H2O52Cr9Be

12C CH2

10B

7Li

rank target

1 52Cr

2 H2O

3 CH2

4 12C

5 9Be

6 7Li

7 10B

θ vs. momentum of e+