Calculated performance of ALS undulator U3.9: Operation at dual wavelengths and high harmonics

Chris Jacobsen

doi:10.1016/0168-9002(90)90092-K

Calculated performance of ALS undulator U3.9: Operation at dual wavelengths and high harmonics

Chris Jacobsen^*

^*Corresponding author for this work

Physics and Astronomy

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

Abstract

Calculations of the spectral output of Advanced Light Source undulator U3.9 are presented. Effects of electron beam emittance and energy spread are included, and undulator magnet field errors are treated approximately so usable estimates of the output of high-harmonic radiation can be made. These calculations indicate that several harmonics can be used simultaneously for obtaining soft X-rays in the λ = 23-44 Å "water window" spectral range. In addition, it is shown that there is an intermediate range of photon energies (∼1-3 keV) where high harmonic undulator radiation is significantly affected by electron beam energy spread and undulator magnet field errors, yet where U3.9 will still outperform ALS wiggler W13.6 for many applications. This intermediate zone between pure undulator and pure wiggler performance may prove useful for extending the energy range at which brightness-sensitive experiments can be done at storage rings of a given electron beam energy.

Original language	English (US)
Pages (from-to)	388-393
Number of pages	6
Journal	Nuclear Inst. and Methods in Physics Research, A
Volume	291
Issue number	1-2
DOIs	https://doi.org/10.1016/0168-9002(90)90092-K
State	Published - May 20 1990

Funding

I would like to thank Brian Kincaid, Malcolm Howells, and Kwang-Je Kim for many helpful discussions. This work was supported in part by the National Science Foundation under grant BBS-8628066.

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

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10.1016/0168-9002(90)90092-K

Cite this

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title = "Calculated performance of ALS undulator U3.9: Operation at dual wavelengths and high harmonics",

abstract = "Calculations of the spectral output of Advanced Light Source undulator U3.9 are presented. Effects of electron beam emittance and energy spread are included, and undulator magnet field errors are treated approximately so usable estimates of the output of high-harmonic radiation can be made. These calculations indicate that several harmonics can be used simultaneously for obtaining soft X-rays in the λ = 23-44 {\AA} {"}water window{"} spectral range. In addition, it is shown that there is an intermediate range of photon energies (∼1-3 keV) where high harmonic undulator radiation is significantly affected by electron beam energy spread and undulator magnet field errors, yet where U3.9 will still outperform ALS wiggler W13.6 for many applications. This intermediate zone between pure undulator and pure wiggler performance may prove useful for extending the energy range at which brightness-sensitive experiments can be done at storage rings of a given electron beam energy.",

author = "Chris Jacobsen",

note = "Funding Information: I would like to thank Brian Kincaid, Malcolm Howells, and Kwang-Je Kim for many helpful discussions. This work was supported in part by the National Science Foundation under grant BBS-8628066.",

year = "1990",

month = may,

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doi = "10.1016/0168-9002(90)90092-K",

language = "English (US)",

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pages = "388--393",

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T2 - Operation at dual wavelengths and high harmonics

AU - Jacobsen, Chris

N1 - Funding Information: I would like to thank Brian Kincaid, Malcolm Howells, and Kwang-Je Kim for many helpful discussions. This work was supported in part by the National Science Foundation under grant BBS-8628066.

PY - 1990/5/20

Y1 - 1990/5/20

N2 - Calculations of the spectral output of Advanced Light Source undulator U3.9 are presented. Effects of electron beam emittance and energy spread are included, and undulator magnet field errors are treated approximately so usable estimates of the output of high-harmonic radiation can be made. These calculations indicate that several harmonics can be used simultaneously for obtaining soft X-rays in the λ = 23-44 Å "water window" spectral range. In addition, it is shown that there is an intermediate range of photon energies (∼1-3 keV) where high harmonic undulator radiation is significantly affected by electron beam energy spread and undulator magnet field errors, yet where U3.9 will still outperform ALS wiggler W13.6 for many applications. This intermediate zone between pure undulator and pure wiggler performance may prove useful for extending the energy range at which brightness-sensitive experiments can be done at storage rings of a given electron beam energy.

AB - Calculations of the spectral output of Advanced Light Source undulator U3.9 are presented. Effects of electron beam emittance and energy spread are included, and undulator magnet field errors are treated approximately so usable estimates of the output of high-harmonic radiation can be made. These calculations indicate that several harmonics can be used simultaneously for obtaining soft X-rays in the λ = 23-44 Å "water window" spectral range. In addition, it is shown that there is an intermediate range of photon energies (∼1-3 keV) where high harmonic undulator radiation is significantly affected by electron beam energy spread and undulator magnet field errors, yet where U3.9 will still outperform ALS wiggler W13.6 for many applications. This intermediate zone between pure undulator and pure wiggler performance may prove useful for extending the energy range at which brightness-sensitive experiments can be done at storage rings of a given electron beam energy.

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Calculated performance of ALS undulator U3.9: Operation at dual wavelengths and high harmonics

Abstract

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ASJC Scopus subject areas

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