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Calculation of thermal deformations in water-cooled monochromator crystals

Technical Report:

Abstract

Through calculation of temperature distribution and thermal deformation of monochromators, optical degradation by the heat loads in SPring-8 have been discussed. Cooling experiments were made on three models of copper structures with the JAERI Electron Beam Irradiation Stand (JEBIS) and the results were used to estimate heat transfer coefficients in the models. The heat transfer coefficients have been adopted to simulate heating processes on silicon models of the same structures as the copper models, for which radiations from the SPring-8 bending magnet and the JAERI prototype undulator (WPH-33J) were considered. It has been concluded that, in the case of bending magnet (with power density of 0.27[MW/m{sup 2}] on monochromator surface), the temperature at the surface center reaches about 30[degC] from the initial temperature of 27[degC] in all the models. In the case of WPH-33J (with power density of 8.2[MW/m{sup 2}]), the temperature reaches about 200 to 280[degC] depending on the models. The radiation from WPH-33J yields slope errors bigger than the Darwin`s width(23[{mu}rad]). (author).
Authors:
Nakamura, Ario; Hashimoto, Shinya; Motohashi, Haruhiko [1] 
  1. JAERI-RIKEN SPring-8 Project Team, Tokyo (Japan)
Publication Date:
Nov 01, 1994
Product Type:
Technical Report
Report Number:
JAERI-Research-94-029
Reference Number:
SCA: 430400; PA: JPN-94:012177; EDB-95:024263; SN: 95001319985
Resource Relation:
Other Information: PBD: Nov 1994
Subject:
43 PARTICLE ACCELERATORS; SPRING-8 STORAGE RING; MONOCHROMATORS; CRYSTALS; THERMAL ANALYSIS; SYNCHROTRON RADIATION; WIGGLER MAGNETS; TEMPERATURE CONTROL; COOLING; OPTICAL PROPERTIES; COMPUTERIZED SIMULATION; DEFORMATION; TEMPERATURE DISTRIBUTION; HEAT TRANSFER; HEAT FLUX; 430400; STORAGE RINGS
OSTI ID:
10109312
Research Organizations:
Japan Atomic Energy Research Inst., Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE95737269; TRN: JP9412177
Availability:
OSTI; NTIS; INIS
Submitting Site:
JPN
Size:
59 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Nakamura, Ario, Hashimoto, Shinya, and Motohashi, Haruhiko. Calculation of thermal deformations in water-cooled monochromator crystals. Japan: N. p., 1994. Web.
Nakamura, Ario, Hashimoto, Shinya, & Motohashi, Haruhiko. Calculation of thermal deformations in water-cooled monochromator crystals. Japan.
Nakamura, Ario, Hashimoto, Shinya, and Motohashi, Haruhiko. 1994. "Calculation of thermal deformations in water-cooled monochromator crystals." Japan.
@misc{etde_10109312,
title = {Calculation of thermal deformations in water-cooled monochromator crystals}
author = {Nakamura, Ario, Hashimoto, Shinya, and Motohashi, Haruhiko}
abstractNote = {Through calculation of temperature distribution and thermal deformation of monochromators, optical degradation by the heat loads in SPring-8 have been discussed. Cooling experiments were made on three models of copper structures with the JAERI Electron Beam Irradiation Stand (JEBIS) and the results were used to estimate heat transfer coefficients in the models. The heat transfer coefficients have been adopted to simulate heating processes on silicon models of the same structures as the copper models, for which radiations from the SPring-8 bending magnet and the JAERI prototype undulator (WPH-33J) were considered. It has been concluded that, in the case of bending magnet (with power density of 0.27[MW/m{sup 2}] on monochromator surface), the temperature at the surface center reaches about 30[degC] from the initial temperature of 27[degC] in all the models. In the case of WPH-33J (with power density of 8.2[MW/m{sup 2}]), the temperature reaches about 200 to 280[degC] depending on the models. The radiation from WPH-33J yields slope errors bigger than the Darwin`s width(23[{mu}rad]). (author).}
place = {Japan}
year = {1994}
month = {Nov}
}