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 – 74Kr Beam (11/4/2014) – Target ladder

240 mm(at limit switch)

(CH2)n

100 um; ~11 mg/cm2

31.0 mmViewer

Au + Mask

169.5 mm

193.5 mm

MaskAu20 mg/cm2

1 cm

Hole size: 2mm

Au3/4”x3/4”

1/4”

1/4”

Viewer

Empty

beam

(I251Y-R)

134.0 mm(CH2)n

50 um; ~5.5 mg/cm2

Happy Election Day!

Alpha source at corner

As viewed by cameraBeamspot 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 10015 – 74Kr Beam (11/4/2014) – Downstream Viewer

Viewer

beam

183.0 mm

Viewer

Blocker0.063” 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 188.0 mm

Mask

MCP 1(downstream)

I250X-R

Mylar foil=1.9um

As viewed by beamRed: center

Gray: imaginary lines connecting holes

As viewed by beam

Expt 10015 – 74Kr Beam (11/4/2014) – MCP Drives

Photograph from downstream side (looking upstream)

Photograph from downstream side (looking upstream)

Mask 183.5 mm

259.5 ? mm

107.5 mmFoil

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 beamRed: center

Gray: imaginary lines connecting holes

As viewed by beam

Expt 10015 – 74Kr Beam (11/4/2014) – MCP Drives (color version)

Photograph from downstream side (looking upstream)

Foil

70.5 mm 188.0 mm

Mask

Mask 183.5 mm

259.5 ? mm

107.5 mmFoil

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!