A variable-focus x-ray compound lens.
Design and fabrication of an x-ray lens assembly for focusing x-ray beams is described. The assembly consists of a number of precisely stacked and aligned aluminum parts. These parts are cut from a long extruded section having sixteen parabolic cavities along its length. The thickness of the wall between adjacent cavities is 0.2 mm. By cutting the assembled parts diagonally as shown below, a variable-focus lens system can be made. Moving the lens horizontally allows the incident beam to pass through fewer or more cavities, collimating or focusing the emerging beam at a desired distance downstream. The variable focus aluminum lens has been used at the Advanced Photon Source to collimate a monochromatic, 81 keV undulator beam to increase downstream crystal monochromator throughput. Results indicate collimation consistent with theoretical expectations.
- Research Organization:
- Argonne National Lab., IL (US)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 805257
- Report Number(s):
- ANL/XFD/CP-108953; TRN: US0300780
- Resource Relation:
- Conference: MEDSI02, Argonne, IL (US), 09/05/2002--09/06/2002; Other Information: PBD: 29 Oct 2002
- Country of Publication:
- United States
- Language:
- English
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