As viewed by camera 83.0 mm Beamspot at center of target Viewer on downstream side of target ladder (target camera looks upstream) Expt 10015 – 74 Kr Beam.

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Presentation transcript:

As viewed by camera 83.0 mm Beamspot at center of target Viewer on downstream side of target ladder (target camera looks upstream) Expt – 74 Kr Beam (11/4/2014) – Target ladder 240 mm (at limit switch) (CH 2 ) n 100 um; ~11 mg/cm mm Viewer Au + Mask mm mm Mask Au 20 mg/cm 2 1 cm Hole size: 2mm Au 3/4”x3/4” 1/4” Viewer Empty beam (I251Y-R) mm (CH 2 ) n 50 um; ~5.5 mg/cm2 Happy Election Day! Alpha source at corner

As viewed by camera Beamspot 1 mm below center of viewer (viewer is too high by 1 mm) Viewer on upstream side of target ladder (target camera looks downstream) Expt – 74 Kr Beam (11/4/2014) – Downstream Viewer Viewer beam mm Viewer Blocker 0.063” thick (1.6 mm) 3”x4” Viewer ~1.5 mm thick 3”x3” (I252Y-R) Happy Election Day!

MCP 0 (upstream) I250Y-R Foil 70.5 mm mm Mask MCP 1 (downstream) I250X-R Mylar foil=1.9um As viewed by beam Red: center Gray: imaginary lines connecting holes As viewed by beam Expt – 74 Kr Beam (11/4/2014) – MCP Drives Photograph from downstream side (looking upstream) Mask mm ? mm mm Foil Empty beam **MCP 0 is too high by 1 mm** Beamspot will be 1 mm below center Happy Election Day!

MCP 0 (upstream) I250Y-R MCP 1 (downstream) I250X-R Mylar foil=1.9um As viewed by beam Red: center Gray: imaginary lines connecting holes As viewed by beam Expt – 74 Kr Beam (11/4/2014) – MCP Drives (color version) Photograph from downstream side (looking upstream) Foil 70.5 mm mm Mask mm ? mm mm Foil Empty beam **MCP 0 is too high by 1 mm** Beamspot will be 1 mm below center Photograph from downstream side (looking upstream) Happy Election Day!