HES-HKS & KaoS meeting Toshi Gogami 11/July/2012

Contents TOSCA calculation of SPL with field clamp + ENGE model XT function calibration

SPL with field clamp + ENGE New magnetic field map  Committed to the svn

SPL with field clamp + ENGE Subtraction Ratio Line Y=0 (X,Z) : (-40,15)  (40,65)

SPL + ENGE Geant4 simulation (ENGE01) SPL ENGE 1.851GeV

Want Λ,Σ 0 tuning power H 2 O ⇔ CH 2 (75921 – 75923)

xt parameters for H 2 O target Parameter data base e05115.param > e05115.param > e05115.param > e05115.param e05115.param > e05115.param > e05115.param e05115.param > e05115.param > e05115.param e05115.param HKS drift distance map 1 : hdriftmap.param : hdriftmap.param (no use for H2O target) 3 : hdriftmap.param : hdriftmap.param : hdriftmap.param : hdriftmap.param (no use for H2O target) 7 : hdriftmap.param (no use for H2O target) ==> It means that parameters No.1 and No.3(=No.4=No.5) need to be optimized for H 2 O target runs. hdriftmap.param : hdriftmap.param : Others

XT functions 9 th polynomial

Tracking residuals of each layers

Drift distance  0.5 cm H 2 O, 52 Cr Peak mean 0.48 cm

To do JLab E – Parameter optimization (xt functions) for H 2 O, 52 Cr target – Matrices tuning Weight study (angle, momentum) Cut conditions (concerning S/N)  Histograms Biding energy Cross section (Λ,Σ 0 from CH 2 and H 2 O target)

END 9/July/2012

x-t function calibration |Wire center – Track coordinate| s 0 Wire center Track coordinate Black : |WC-TC| Magenta : Profile of |WC-TC| Green : x-t calc. Track Drift distance Fitting Function HES/HKS collaboration meeting, T.Gogami9-11/May/201213

x-t calibration for 52 Cr Target Residuals better – KDC1 ; 400 [μm]  300 [μm] Number up – ~10% increased at χ 2 <20 – (~5% increased without χ 2 cut) χ 2 cut condition HES/HKS collaboration meeting, T.Gogami9-11/May/201214