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Synchrotron/Neutron/Fusion » Synchrotron » Fluorescent Screen Assembly (FC-204)
Fluorescent Screen Assembly (FC-204)

 

Based on a design by Dr. Henry Bellamy, Louisiana State University [for more information on LSU please visit http://www.camd.lsu.edu/ ], ADC has manufactured the FC-204 unit which allows the user to view the position and profile of an incident X-ray beam. The full assembly of the fluorescent screen consists of three main components: a custom 4-way cross; a linear actuator mounted on top of the 4-way cross; and a water-cooled fluorescent screen. The upstream and downstream CF flanges of the custom 4-way cross can be sized to match the user’s beamline. On the bottom side of the 4-way cross is an angled port (60° from horizontal) with a tapped, non-rotatable 4 ½”CF for connecting a viewport. On the top side of the 4-way cross is another angled, non-rotatable 4 ½” CF for connecting the fluorescent screen actuator.   The screen plates, which are available both cooled and un-cooled, are coated with a fluorescent material to convert X-rays to visible light and can be moved in and out of the beam by remote control. A CCD camera and motorised zoom lens looks up through a viewport directly onto the grid plate of the screen; camera magnification and focus can be controlled remotely. Equally spaced grooves are cut into the surface of the screen to provide a reference for imaging from below.

 

The full assembly of the fluorescent screen consists of three main components: a welded vacuum chamber; a linear actuator mounted to one branch of the chamber; and a water-cooled fluorescent screen.

 

Parameter

Value

Travel Range

50mm [2”]

Total Heat Load

426 W

Maximum Heat Flux

2.18 W/mm2

Cooling Connections

¼” Swagelok

Minimum Cooling Flow (Water at 20 °C)

1.5 m/s [0.29 gal/min]

Compressed Air Connections

Push-to-Connect ¼”

Minimum Air Pressure

40 psi

Drain Current Connection

BNC

 

ADC has over 17 years of experience and extensive capability in the machining and manufacturing of complex systems for the scientific community. We focus mainly on synchrotrons and neutron sources. We have an in house physicist and engineers for such things as magnet modeling for undulators, optics for beam lines, FEA and thermal analysis, as well as other disciplines. We have the facilities and equipment for UHV applications such as a class-50 clean room, leak checkers, RGAs, vacuum pumps, and UHV component cleaning and bagging facilities, as well as a highly trained staff.

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