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Title: Thermal analysis of the crotch absorber in APS

A crotch absorber design for use in the Advanced Photon source (APS) has been proposed and analyzed. the absorber is placed downstream of sectors S2 and S4 in the curved storage ring chamber and will be subjected to a peak power of 120 W/mm{sup 2} per 100mA synchrotron radiation. A beryllium ring is brazed on the GlidCop cooling cylinder in order to diffuse the concentrated bending magnet heating. One concentric water channel and two annular return water channels are arranged in the GlidCop cylinder to enhance the cooling. A Bodner-Partom thermoviscoplastic constitutive equation and a modified Manson-Coffin fatigue relation are proposed to simulate the cyclic thermal loading, as well as to predict the thermal fatigue life of the crotch absorber. Results of temperature and stress using finite element computations are displayed and series of e-beam welder tests and microstructure measurements are reported.
Authors:
;
Publication Date:
OSTI Identifier:
7160734
Report Number(s):
ANL/CP-77003; CONF-920792--36
ON: DE93000612
DOE Contract Number:
W-31109-ENG-38
Resource Type:
Conference
Resource Relation:
Conference: Society of Photo-Optical Instrumentation Engineers (SPIE) international symposium on optical applied science and engineering, San Diego, CA (United States), 19-24 Jul 1992
Research Org:
Argonne National Lab., IL (United States)
Sponsoring Org:
DOE; USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ADVANCED PHOTON SOURCE; BEAM DUMPS; THERMAL ANALYSIS; ABSORPTION; DEFORMATION; DESIGN; ELECTRON BEAM WELDING; FATIGUE; FINITE ELEMENT METHOD; MICROSTRUCTURE; SYNCHROTRON RADIATION; THERMAL STRESSES; BREMSSTRAHLUNG; CRYSTAL STRUCTURE; ELECTROMAGNETIC RADIATION; FABRICATION; JOINING; MECHANICAL PROPERTIES; NUMERICAL SOLUTION; RADIATION SOURCES; RADIATIONS; SORPTION; STRESSES; SYNCHROTRON RADIATION SOURCES; WELDING 430303* -- Particle Accelerators-- Experimental Facilities & Equipment