Meson Production at 8 GeV for IDS120h X. Ding, UCLA Target Studies, Dec. 27, 2011.

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Presentation transcript:

Meson Production at 8 GeV for IDS120h X. Ding, UCLA Target Studies, Dec. 27, 2011

Configuration of IDS120h

Meson Production Study The mercury jet target geometry. The proton beam and mercury jet cross at z=-37.5 cm. 1. IDS120h (Geometry and fieldmap) 2. Target (HG or GA) 3. Beam below the HG/GA jet exactly at z = cm and project beam back to z = -200 cm. 4. Initial target parameters: target radius of 5 mm, beam angle of 67 mrad at z = cm, beam/jet crossing angle of 33 mrad at z = cm.

Optimized Target Parameters at z = cm HG GA Beam radius, mm Crossing angle, mrad Beam angle, mrad Beam radius, mm Crossing angle, mrad Beam angle, mrad Initial st Cycle nd Cycle rd Cycle

Meson Productions at 8 GeV (400,000 events) HGGA Before optimization (Beam radius/beam angle/crossing angle (5mm/67mrad/33mrad) (5mm/67mrad/33mrad) After optimization (Beam radius/beam angle/crossing angle) (4.15mm/120mrad/21.6mr ad) (4.9mm/92mrad/12.2mrad )