A Pinhole Camera for SPEAR 2 | Zendy

J. Safranek | Zendy

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A Pinhole Camera for SPEAR 2

Author(s) -

J. Safranek

Publication year - 2002

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/800080

Subject(s) - pinhole (optics) , optics , spear , thermal emittance , physics , aperture (computer memory) , pinhole camera , diffraction , image resolution , beam (structure) , geography , archaeology , acoustics

A new pinhole camera system has been installed on Spear 2 to measure its vertical emittance. The hard X-rays from a bending magnet source point are imaged on a phosphor screen through a 30 um x 25 um pinhole aperture. The resolution of the system for 8 keV photons is limited to 31.2 um by Fraunhoffer diffraction and is much smaller than the 340 um FWHM vertical beam size corresponding to 0.9% vertical coupling. Measurements are presented. Optimal pinhole location and hole size are discussed.

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