HES-HKS & KaoS meeting14/Oct/2011Toshi Gogami

25/May/2011, A-1 Counting Room, Mainz Univ.

Contents

• Rate of KDC

For the whole acceptance of the HKS

The HKS Tracking efficiencies(The Difference between Low & high momentum side)

Momentum dependence Mesh study

77124 ( 52Cr target )

5 × 5

覚書 for me

1. Pick up information from “h_dc_trans.f”– Total hits, Raw TDC, Plane, Wire– Output “kdc_WireRate.dat”

2. e05115replay/kdcrate/*– Create ROOT file from dat file (mkROOT)– ./root/*.root• ratelayer.cc• ratewire.cc

Rates of the KDC LayersCH2, 76314

KDC1 KDC2~3 MHz~6 MHz

Rates of the KDC LayersH2O, 75971

KDC1 KDC2~10 MHz~20 MHz

Rates of the KDC Layers52Cr, 76314

KDC1 KDC2~11 MHz~22 MHz

Rates of the KDC wiresCH2, 76314

Wire Number

Rate

[kH

z]

KDC1-u KDC1-u’ KDC1-x KDC1-x’ KDC1-v KDC1-v’

KDC2-u KDC2-u’ KDC2-x KDC2-x’ KDC2-v KDC2-v’

< 150 kHz < 120 kHz

< 70 kHz < 60 kHz

Rates of the KDC wiresH2O, 75971

Wire Number

Rate

[kH

z]

KDC1-u KDC1-u’ KDC1-x KDC1-x’ KDC1-v KDC1-v’

KDC2-u KDC2-u’ KDC2-x KDC2-x’ KDC2-v KDC2-v’

< 450 kHz < 270 kHz

< 250 kHz < 200 kHz

Rates of the KDC wires52Cr, 77124

Wire Number

Rate

[kH

z]

KDC1-u KDC1-u’ KDC1-x KDC1-x’ KDC1-v KDC1-v’

KDC2-u KDC2-u’ KDC2-x KDC2-x’ KDC2-v KDC2-v’

< 510 kHz < 350 kHz

< 290 kHz < 230 kHz

Summary and To do

• Summary– Rate per KDC layers

• KDC1 < 25MHz, KDC2 < 15MHz (for 52Cr data)

– Rate per KDC wires• KDC1 < ~500 [kHz] (u-layer), KDC2 < ~300 [kHz] (u-layer) (for 52Cr data)

• To Do– E01-011

• Enge GEANT

– E05-115• Momentum dependence of the HKS tracking efficiency• HKS b.g. rate study by GEANT simulation• Miss identification efficiency estimation by Doi code

End1/Oct/2011, Venezia, Italy

A effect of the new tracking code(HKS single analysis)

A pure effect of the improvement of the tracking code• All entries 71.1% increased• Kaons 75.5% increased

Improved uniformly for the HKS acceptance

77120 – 77124 (52Cr target)

After

Before