title: Transmission-mode diamond white-beam position monitor at NSLS.
abstract: Two transmission-mode diamond X-ray beam position monitors installed at National Synchrotron Light Source (NSLS) beamline X25 are described. Each diamond beam position monitor is constructed around two horizontally tiled electronic-grade (p.p.b. nitrogen impurity) single-crystal (001) CVD synthetic diamonds. The position, angle and flux of the white X-ray beam can be monitored in real time with a position resolution of 500 nm in the horizontal direction and 100 nm in the vertical direction for a 3 mm × 1 mm beam. The first diamond beam position monitor has been in operation in the white beam for more than one year without any observable degradation in performance. The installation of a second, more compact, diamond beam position monitor followed about six months later, adding the ability to measure the angular trajectory of the photon beam.
authors.affiliation: Physics and Astronomy Department, Stony Brook University, Stony Brook, NY 11794, USA. erik.muller@stonybrook.edu
authors.forename: Erik M
authors.initials: EM
authors.lastname: Muller
authors.forename: John
authors.initials: J
authors.lastname: Smedley
authors.forename: Jen
authors.initials: J
authors.lastname: Bohon
authors.forename: Xi
authors.initials: X
authors.lastname: Yang
authors.forename: Mengjia
authors.initials: M
authors.lastname: Gaowei
authors.forename: John
authors.initials: J
authors.lastname: Skinner
authors.forename: Gianluigi
authors.initials: G
authors.lastname: De Geronimo
authors.forename: Michael
authors.initials: M
authors.lastname: Sullivan
authors.forename: Marc
authors.initials: M
authors.lastname: Allaire
authors.forename: Jeffrey W
authors.initials: JW
authors.lastname: Keister
authors.forename: Lonny
authors.initials: L
authors.lastname: Berman
authors.forename: Annie
authors.initials: A
authors.lastname: Héroux
mesh_terms: D018130:Diamond / Q000737:chemistry; D004867:Equipment Design; D017356:Synchrotrons / Q000295:instrumentation*; D014965:X-Rays
chemical_list: D018130:Diamond