Accession Number : ADP005072

Title :   Undulators as a Primary Source of Coherent X-Rays.

Corporate Author : CALIFORNIA UNIV BERKELEY LAWRENCE BERKELEY LAB

Personal Author(s) : Attwood,D. T. ; Kim,K. J. ; Halbach,K. ; Howells,M. R.

Report Date : OCT 1985

Pagination or Media Count : 10

Abstract : Coherent x-rays have long been sought as a tool to discover microscopic details of physical and biological assemblies. Such radiation would permit biologists, chemists and physicists to probe with spatial resolutions better than 1,000 A (perhaps 10 to 100 A in special circumstances), and with an ability to distinguish concentrations of specific atomic elements. It has been prevailing view that such radiation, when available, would emanate from an atomic x ray laser. Although that is possible, we are coming to realize that to a large degree these needs will first be satisfied by coherent x rays generated through the interaction of relativistic electron beams of very high brightness with periodic magnet structures (undulators). Within the next 2-5 years it will be possible with undulators and monochromators to generate x-rays at substantial peak and average powers, with thousands of wavelengths of longitudinal coherence, full spatial coherence, complete polarization control and broad tunability at megahertz repetition rates.

Descriptors :   *X RAY APPARATUS, *PARTICLE ACCELERATOR COMPONENTS, COHERENT RADIATION, BRIGHTNESS, RELATIVITY THEORY, ELECTRON BEAMS, ACCELERATION, MAGNETS, PERIODIC VARIATIONS, ENERGY TRANSFER

Distribution Statement : APPROVED FOR PUBLIC RELEASE