HKS-HES

D.Kawama

HES Status ReportSep ’07 Part1

Magnet Study•BH Curve•Beamline

Calibration Study

•Raster effect?

• Contents

HKS-HESHow to calibrate HES+HKS+SPL?

Sieve Slit Run

• For angular calibration• Use in proton target run?

Use some reaction• (e,e’e+e-) • can’t detect in E01-011• (e,e’p)• Kinematic adjustment will be necessary• Another reaction proton mom electron mom target mass Beam energy

1.2 0.967 0.938 1.552103411

1.3 1.1 0.938 1.765073298

1.1 0.85 0.938 1.357629275

HKS-HESHES SS Hole Size

5.9*10-5 ~200(*10-33)?

Target Beam Thickness C Nvp L /hour (WHKS=10msr, Klive=0.3)

CH2 2 mA 460mg/cm2

*2/144.92*1035 5.8 ~60

H20 10mA 500mg/cm2

*2/182.08*1036 24.5 ~260

12C 30mA 100 mg/cm2 9.38*1035 5.5 (for 100nb/sr) ~6051V 30 mA 100 mg/cm2 2.21*1035 1.3 (for 100nb/sr) ~14

HKS-HESNew FoM (collimator=-9cm)

8deg, 6cm

BG ~5M 12Enge

HKS-HESNew FoM (collimator=-7cm)

7.5deg, 5.5cm

12EngeBG ~3M

HKS-HESNew FoM (collimator=-5cm)

7deg, 5cm

12EngeBG ~3M

HKS-HESNew FoM (collimator=-3cm)

6deg, 4.5cm

12EngeBG ~2M

HKS-HESNew FoM (Summary)

HKS-HESNext to do

TOSCA Study for HES Magnets

Resolution improvement•Divide momentum region•Modified ED Map •Kato. eq

EDC1, 2 Support Design

Sieve Slit Study •Yield, Resolution Study•Analysis Tool•Raster study

FoM Study •550 MeV/c case•Scattered in