HES-HKS & KaoS meeting

1. HES-HKS & KaoS meeting 14/Oct/2011 Toshi Gogami 25/May/2011, A-1 Counting Room, Mainz Univ.

2. Contents • Rate of KDC For the whole acceptance of the HKS

3. The HKS Tracking efficiencies(The Difference between Low & high momentum side) Momentum dependence • Mesh study 77124 ( 52Cr target ) 5 × 5

4. 覚書 for me • Pick up information from “h_dc_trans.f” • Total hits, Raw TDC, Plane, Wire • Output “kdc_WireRate.dat” • e05115replay/kdcrate/* • Create ROOT file from dat file (mkROOT) • ./root/*.root • ratelayer.cc • ratewire.cc

5. Rates of the KDC Layers CH2, 76314 KDC2 KDC1 ~3 MHz ~6 MHz

6. Rates of the KDC Layers H2O, 75971 KDC2 KDC1 ~10 MHz ~20 MHz

7. Rates of the KDC Layers 52Cr, 76314 KDC2 KDC1 ~11 MHz ~22 MHz

8. Rates of the KDC wires CH2, 76314 KDC1-u KDC1-u’ KDC1-x KDC1-x’ KDC1-v KDC1-v’ < 150 kHz < 120 kHz Rate [kHz] Wire Number KDC2-u’ KDC2-x KDC2-x’ KDC2-v KDC2-v’ KDC2-u < 70 kHz < 60 kHz

9. Rates of the KDC wires H2O, 75971 KDC1-u KDC1-u’ KDC1-x KDC1-x’ KDC1-v KDC1-v’ < 450 kHz < 270 kHz Rate [kHz] Wire Number KDC2-u’ KDC2-x KDC2-x’ KDC2-v KDC2-v’ KDC2-u < 250 kHz < 200 kHz

10. Rates of the KDC wires 52Cr, 77124 KDC1-u KDC1-u’ KDC1-x KDC1-x’ KDC1-v KDC1-v’ < 510 kHz < 350 kHz Rate [kHz] Wire Number KDC2-u’ KDC2-x KDC2-x’ KDC2-v KDC2-v’ KDC2-u < 290 kHz < 230 kHz

11. 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

12. End 1/Oct/2011, Venezia, Italy

13. A effect of the new tracking code(HKS single analysis) Before 77120 – 77124 (52Cr target) 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 After