Liquid gallium cooling of silicon crystals in high intensity photon beam

Conference · Tue Nov 01 04:00:00 EST 1988

OSTI ID:6478993

Smither, R K; Forster, G A; Bilderback, D H; Bedzyk, M; Finkelstein, K; Henderson, C; White, J; Berman, L E; Stefan, P; Oversluizen, T

The high-brilliance, insertion-device-based, photon beams of the next generation of synchrotron sources will deliver large thermal loads (1 kW to 10 kW) to the first optical elements. Considering the problems that present synchrotron users are experiencing with beams from recently installed insertion devices, new and improved methods of cooling these first optical elements, particularly when they are diffraction crystals, are clearly needed. A series of finite element calculations were performed to test the efficiency of new cooling geometries and new cooling fluids. The best results were obtained with liquid Ga metal flowing in channels just below the surface of the crystal. Ga was selected because of its good thermal conductivity and thermal capacity, low melting point, high boiling point, low kinetic viscosity, and very low vapor pressure. Its very low vapor pressure, even at elevated temperatures, makes it especially attractive in uhv conditions. A series of experiments were conducted at CHESS in February of 1988 that compared liquid gallium cooled silicon diffraction crystals with water cooled crystals. 2 refs., 16 figs., 1 tab.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6478993
• Report Number(s): CONF-8808141-8; ON: DE89005875
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603 -- Materials-- Properties
656002* -- Condensed Matter Physics-- General Techniques in Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BEAM CURRENTS
BEAMS
COOLING
CRYSTALS
CURRENTS
ELECTRON BEAMS
ELEMENTS
ENERGY TRANSFER
FINITE ELEMENT METHOD
GALLIUM
HEAT TRANSFER
LEPTON BEAMS
METALS
NUMERICAL SOLUTION
PARTICLE BEAMS
PHOTON BEAMS
PHYSICAL PROPERTIES
SEMIMETALS
SILICON
SURFACE PROPERTIES
TEMPERATURE DISTRIBUTION
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES