Meson Production Comparison between Hg and Ga at 8 GeV X. Ding, UCLA Target Studies, Oct. 04, 2011.

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Meson Production Comparison between Hg and Ga at 8 GeV X. Ding, UCLA Target Studies, Oct. 04, 2011

Meson Productions at 6 and 8 GeV (All using the same geometry as Hg case)

Optimized Target Parameters at z=-37.5 cm Target materialHgGa Target radius (Rtg)0.38 cm0.42 cm Proton Beam Angle (θb)99 mrad77 mrad Crossing Angle of Beam/Jet (θc) mrad9 mrad Path length of proton beam inside the jet [2Rtg/sin(θc)] 39.7 cm93.3 cm The mercury jet target geometry. The proton beam and mercury jet cross at z=-37.5 cm.

Meson Production Comparison at Z = 5000 cm Target materialHgGa Meson Production per proton per GeV (errorbar) before optimization (0.5cm/67mrad/33mrad) (0.0003) ( ) Meson Production per proton per GeV (errorbar) after optimization ( ) (14.3% higher than GA case) ( ) The new optimization is based on a jet that with azimuth below the beam at z = cm. Further optimization with different azimuths is possible.

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