Emittance measurement at the NSLS x-ray ring

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:462886

Safranek, J; Stefan, P M

A pinhole camera for imaging x-ray synchrotron radiation from a dipole magnet is now in operation at the NSLS X-Ray Ring. The pinhole camera detector is a 0.5 mm thick YAG phosphor screen viewed by a video camera. Both the theoretical pinhole diffraction pattern and the measured modulation transfer function (MTF) of the phosphor and camera have been deconvolved from the measured profile in order to derive the true transverse profile of the electron beam. This profile was then fit to a 2-dimensional Gaussian. The electron beam emittance as a function of the phase space acceptance of the pinhole camera has been derived, so the horizontal and vertical electron emittances can be deduced from the major and minor sigmas of the fit Gaussian. In the X-Ray Ring, the vertical emittance is kept small to maximize the synchrotron radiation brightness. The ratio of the measured vertical to horizontal emittance is 0.001.

• Research Organization: Brookhaven National Lab., Upton, NY (United States). National Synchrotron Light Source Dept.
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (United States)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 462886
• Report Number(s): BNL--64141; CONF-960621--36; ON: DE97004599
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
BEAM EMITTANCE
BEAM PROFILES
CAMERAS
ELECTRON BEAMS
FREQUENCY DEPENDENCE
NSLS
PERFORMANCE
PHASE SPACE
PHOSPHORS
X-RAY DETECTION
X-RAY SOURCES