Optimization of monochromator crystal bending designs using computer simulations

A. Frenkel; B. Barg; S. Heald; K. H. Kim; F. Brown; E. A. Stern

doi:10.1063/1.1147485

Optimization of monochromator crystal bending designs using computer simulations

A. Frenkel, B. Barg, S. Heald, K. H. Kim, F. Brown, E. A. Stern

Research output: Contribution to journal › Article › peer-review

Abstract

Sagittal focusing of a synchrotron radiation beam by cylindrically bending the second crystal in a double‐crystal monochromator is an important way of increasing beam density at the sample posiion. In this paper we describe results obtained by finite element analysis of various optimized Si (111) crystal shapes. For the bending magnet and wiggler sources, we analyzed ribbed crystals and found conditions at which the sagittal curvature is cylindrical and the anticlastic effect is minimized. For the undulator A source, we found that a single slot in the center of a thick plate would be sufficient to eliminate the anticlastic effect and ensure cylindrical sagittal bending. Autofocusing of the beam by means of a trapezoidal slot was investigated, and simulation results are discussed.

Original language	English
Pages (from-to)	3355
Number of pages	1
Journal	Review of Scientific Instruments
Volume	67
Issue number	9
DOIs	https://doi.org/10.1063/1.1147485
State	Published - Sep 1996
Externally published	Yes

Keywords

COMPUTERIZED SIMULATION
CRYSTALS
DESIGN
FINITE ELEMENT METHOD
FOCUSING
MONOCHROMATORS
OPTICAL SYSTEMS
OPTIMIZATION
SHAPE
SYNCHROTRON RADIATION SOURCES
X−RAY EQUIPMENT

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10.1063/1.1147485

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title = "Optimization of monochromator crystal bending designs using computer simulations",

abstract = "Sagittal focusing of a synchrotron radiation beam by cylindrically bending the second crystal in a double‐crystal monochromator is an important way of increasing beam density at the sample posiion. In this paper we describe results obtained by finite element analysis of various optimized Si (111) crystal shapes. For the bending magnet and wiggler sources, we analyzed ribbed crystals and found conditions at which the sagittal curvature is cylindrical and the anticlastic effect is minimized. For the undulator A source, we found that a single slot in the center of a thick plate would be sufficient to eliminate the anticlastic effect and ensure cylindrical sagittal bending. Autofocusing of the beam by means of a trapezoidal slot was investigated, and simulation results are discussed.",

keywords = "COMPUTERIZED SIMULATION, CRYSTALS, DESIGN, FINITE ELEMENT METHOD, FOCUSING, MONOCHROMATORS, OPTICAL SYSTEMS, OPTIMIZATION, SHAPE, SYNCHROTRON RADIATION SOURCES, X−RAY EQUIPMENT",

author = "A. Frenkel and B. Barg and S. Heald and Kim, {K. H.} and F. Brown and Stern, {E. A.}",

year = "1996",

month = sep,

doi = "10.1063/1.1147485",

language = "אנגלית",

volume = "67",

pages = "3355",

journal = "Review of Scientific Instruments",

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publisher = "American Institute of Physics",

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T1 - Optimization of monochromator crystal bending designs using computer simulations

AU - Frenkel, A.

AU - Barg, B.

AU - Heald, S.

AU - Kim, K. H.

AU - Brown, F.

AU - Stern, E. A.

PY - 1996/9

Y1 - 1996/9

N2 - Sagittal focusing of a synchrotron radiation beam by cylindrically bending the second crystal in a double‐crystal monochromator is an important way of increasing beam density at the sample posiion. In this paper we describe results obtained by finite element analysis of various optimized Si (111) crystal shapes. For the bending magnet and wiggler sources, we analyzed ribbed crystals and found conditions at which the sagittal curvature is cylindrical and the anticlastic effect is minimized. For the undulator A source, we found that a single slot in the center of a thick plate would be sufficient to eliminate the anticlastic effect and ensure cylindrical sagittal bending. Autofocusing of the beam by means of a trapezoidal slot was investigated, and simulation results are discussed.

AB - Sagittal focusing of a synchrotron radiation beam by cylindrically bending the second crystal in a double‐crystal monochromator is an important way of increasing beam density at the sample posiion. In this paper we describe results obtained by finite element analysis of various optimized Si (111) crystal shapes. For the bending magnet and wiggler sources, we analyzed ribbed crystals and found conditions at which the sagittal curvature is cylindrical and the anticlastic effect is minimized. For the undulator A source, we found that a single slot in the center of a thick plate would be sufficient to eliminate the anticlastic effect and ensure cylindrical sagittal bending. Autofocusing of the beam by means of a trapezoidal slot was investigated, and simulation results are discussed.

KW - COMPUTERIZED SIMULATION

KW - CRYSTALS

KW - DESIGN

KW - FINITE ELEMENT METHOD

KW - FOCUSING

KW - MONOCHROMATORS

KW - OPTICAL SYSTEMS

KW - OPTIMIZATION

KW - SHAPE

KW - SYNCHROTRON RADIATION SOURCES

KW - X−RAY EQUIPMENT

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VL - 67

SP - 3355

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 9

ER -

Optimization of monochromator crystal bending designs using computer simulations

Abstract

Keywords

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