Analysis of photoinjector transverse phase space in action and phase coordinates

Houjun Qian; Mikhail Krasilnikov; Zakaria Aboulbanine; Gowri Adhikari; Namra Aftab; Prach Boonpornpras; Georgi Georgiev; James Good; Matthias Gross; Christian Koschitzki; Xiangkun Li; Osip Lishilin; Anusorn Lueangaramwong; Raffael Niemczyk; Anne Oppelt; Guan Shu; Frank Stephan; Grygorii Vashchenko; Tobias Weilbach

doi:10.1103/PhysRevAccelBeams.25.103401

Analysis of photoinjector transverse phase space in action and phase coordinates

Houjun Qian, Mikhail Krasilnikov, Zakaria Aboulbanine, Gowri Adhikari, Namra Aftab, Prach Boonpornpras, Georgi Georgiev, James Good, Matthias Gross, Christian Koschitzki, Xiangkun Li, Osip Lishilin, Anusorn Lueangaramwong, Raffael Niemczyk, Anne Oppelt, Guan Shu, Frank Stephan, Grygorii Vashchenko, Tobias Weilbach

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

1 Scopus citations

Abstract

Photoinjectors are the main high brightness electron sources for x-ray free electron lasers (XFELs). Photoinjector emittance reduction is one of the key knobs for improving XFEL lasing, so precise emittance measurement is critical. It is well known that rms emittance is very sensitive to low intensity tails of particle distributions in the phase space, whose measurement depends on the signal to noise ratio and image processing procedures. Such sensitivities make the interpretations of beam transverse brightness challenging, leading to different emittance definitions to reduce the impact of tail particles. In this paper, transverse phase space is analyzed in action and phase coordinates for both analytical models and experiments, which gives a more intuitive way to calculate the beam core brightness.

Original language	English
Article number	103401
Journal	Physical Review Accelerators and Beams
Volume	25
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevAccelBeams.25.103401
State	Published - Oct 2022
Externally published	Yes

Funding

The authors appreciate inspiring discussions with C. J. Richard on transverse phase space analysis in the action and phase coordinates. This work was supported by the European XFEL Research and Development program.

Funders	Funder number
European XFEL Research and Development program

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10.1103/PhysRevAccelBeams.25.103401

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Qian, H., Krasilnikov, M., Aboulbanine, Z., Adhikari, G., Aftab, N., Boonpornpras, P., Georgiev, G., Good, J., Gross, M., Koschitzki, C., Li, X., Lishilin, O., Lueangaramwong, A., Niemczyk, R., Oppelt, A., Shu, G., Stephan, F., Vashchenko, G., & Weilbach, T. (2022). Analysis of photoinjector transverse phase space in action and phase coordinates. Physical Review Accelerators and Beams, 25(10), Article 103401. https://doi.org/10.1103/PhysRevAccelBeams.25.103401

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title = "Analysis of photoinjector transverse phase space in action and phase coordinates",

abstract = "Photoinjectors are the main high brightness electron sources for x-ray free electron lasers (XFELs). Photoinjector emittance reduction is one of the key knobs for improving XFEL lasing, so precise emittance measurement is critical. It is well known that rms emittance is very sensitive to low intensity tails of particle distributions in the phase space, whose measurement depends on the signal to noise ratio and image processing procedures. Such sensitivities make the interpretations of beam transverse brightness challenging, leading to different emittance definitions to reduce the impact of tail particles. In this paper, transverse phase space is analyzed in action and phase coordinates for both analytical models and experiments, which gives a more intuitive way to calculate the beam core brightness.",

author = "Houjun Qian and Mikhail Krasilnikov and Zakaria Aboulbanine and Gowri Adhikari and Namra Aftab and Prach Boonpornpras and Georgi Georgiev and James Good and Matthias Gross and Christian Koschitzki and Xiangkun Li and Osip Lishilin and Anusorn Lueangaramwong and Raffael Niemczyk and Anne Oppelt and Guan Shu and Frank Stephan and Grygorii Vashchenko and Tobias Weilbach",

note = "Publisher Copyright: {\textcopyright} 2022 authors. Published by the American Physical Society.",

year = "2022",

month = oct,

doi = "10.1103/PhysRevAccelBeams.25.103401",

language = "English",

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journal = "Physical Review Accelerators and Beams",

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Qian, H, Krasilnikov, M, Aboulbanine, Z, Adhikari, G, Aftab, N, Boonpornpras, P, Georgiev, G, Good, J, Gross, M, Koschitzki, C, Li, X, Lishilin, O, Lueangaramwong, A, Niemczyk, R, Oppelt, A, Shu, G, Stephan, F, Vashchenko, G & Weilbach, T 2022, 'Analysis of photoinjector transverse phase space in action and phase coordinates', Physical Review Accelerators and Beams, vol. 25, no. 10, 103401. https://doi.org/10.1103/PhysRevAccelBeams.25.103401

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T1 - Analysis of photoinjector transverse phase space in action and phase coordinates

AU - Qian, Houjun

AU - Krasilnikov, Mikhail

AU - Aboulbanine, Zakaria

AU - Adhikari, Gowri

AU - Aftab, Namra

AU - Boonpornpras, Prach

AU - Georgiev, Georgi

AU - Good, James

AU - Gross, Matthias

AU - Koschitzki, Christian

AU - Li, Xiangkun

AU - Lishilin, Osip

AU - Lueangaramwong, Anusorn

AU - Niemczyk, Raffael

AU - Oppelt, Anne

AU - Shu, Guan

AU - Stephan, Frank

AU - Vashchenko, Grygorii

AU - Weilbach, Tobias

PY - 2022/10

Y1 - 2022/10

N2 - Photoinjectors are the main high brightness electron sources for x-ray free electron lasers (XFELs). Photoinjector emittance reduction is one of the key knobs for improving XFEL lasing, so precise emittance measurement is critical. It is well known that rms emittance is very sensitive to low intensity tails of particle distributions in the phase space, whose measurement depends on the signal to noise ratio and image processing procedures. Such sensitivities make the interpretations of beam transverse brightness challenging, leading to different emittance definitions to reduce the impact of tail particles. In this paper, transverse phase space is analyzed in action and phase coordinates for both analytical models and experiments, which gives a more intuitive way to calculate the beam core brightness.

AB - Photoinjectors are the main high brightness electron sources for x-ray free electron lasers (XFELs). Photoinjector emittance reduction is one of the key knobs for improving XFEL lasing, so precise emittance measurement is critical. It is well known that rms emittance is very sensitive to low intensity tails of particle distributions in the phase space, whose measurement depends on the signal to noise ratio and image processing procedures. Such sensitivities make the interpretations of beam transverse brightness challenging, leading to different emittance definitions to reduce the impact of tail particles. In this paper, transverse phase space is analyzed in action and phase coordinates for both analytical models and experiments, which gives a more intuitive way to calculate the beam core brightness.

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JO - Physical Review Accelerators and Beams

JF - Physical Review Accelerators and Beams

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Analysis of photoinjector transverse phase space in action and phase coordinates

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