Measurement of an electron beam size with a laser wire beam profile monitor

Hiroshi Sakai; Yousuke Honda; Noboru Sasao; Sakae Araki; Yasuo Higashi; Toshiyuki Okugi; Takashi Taniguchi; Junji Urakawa; Mikio Takano

doi:10.1103/PhysRevSTAB.4.022801

Measurement of an electron beam size with a laser wire beam profile monitor

Hiroshi Sakai, Yousuke Honda, Noboru Sasao, Sakae Araki, Yasuo Higashi, Toshiyuki Okugi, Takashi Taniguchi, Junji Urakawa, Mikio Takano

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

19 Citations (Scopus)

Abstract

We describe the first measurement of an electron beam size in the accelerator test facility damping ring at KEK with a laser wire beam profile monitor. This monitor is based upon the Compton scattering process of electrons with a laser light target, which is produced by injecting a cw laser beam into a Fabry-Pérot optical cavity. We have observed clear signals of the Compton scattered photons and confirmed that the observed energy spectrum as well as the count rate agree with the expected ones. From the measurement, we have deduced the vertical beam size σ_b to be 9.8 ± 1.1 ± 0.4 μm, where the first (second) error represents statistical (systematic) uncertainty. Various improvements are in progress to enhance the signal-to-noise ratio, which is essential for the detailed study of the beam dynamics.

Original language	English
Article number	022801
Pages (from-to)	34-39
Number of pages	6
Journal	Physical Review Special Topics - Accelerators and Beams
Volume	4
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevSTAB.4.022801
Publication status	Published - 2001
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)
Surfaces and Interfaces

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10.1103/PhysRevSTAB.4.022801

Cite this

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title = "Measurement of an electron beam size with a laser wire beam profile monitor",

abstract = "We describe the first measurement of an electron beam size in the accelerator test facility damping ring at KEK with a laser wire beam profile monitor. This monitor is based upon the Compton scattering process of electrons with a laser light target, which is produced by injecting a cw laser beam into a Fabry-P{\'e}rot optical cavity. We have observed clear signals of the Compton scattered photons and confirmed that the observed energy spectrum as well as the count rate agree with the expected ones. From the measurement, we have deduced the vertical beam size σb to be 9.8 ± 1.1 ± 0.4 μm, where the first (second) error represents statistical (systematic) uncertainty. Various improvements are in progress to enhance the signal-to-noise ratio, which is essential for the detailed study of the beam dynamics.",

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T1 - Measurement of an electron beam size with a laser wire beam profile monitor

AU - Sakai, Hiroshi

AU - Honda, Yousuke

AU - Sasao, Noboru

AU - Araki, Sakae

AU - Higashi, Yasuo

AU - Okugi, Toshiyuki

AU - Taniguchi, Takashi

AU - Urakawa, Junji

AU - Takano, Mikio

PY - 2001

Y1 - 2001

N2 - We describe the first measurement of an electron beam size in the accelerator test facility damping ring at KEK with a laser wire beam profile monitor. This monitor is based upon the Compton scattering process of electrons with a laser light target, which is produced by injecting a cw laser beam into a Fabry-Pérot optical cavity. We have observed clear signals of the Compton scattered photons and confirmed that the observed energy spectrum as well as the count rate agree with the expected ones. From the measurement, we have deduced the vertical beam size σb to be 9.8 ± 1.1 ± 0.4 μm, where the first (second) error represents statistical (systematic) uncertainty. Various improvements are in progress to enhance the signal-to-noise ratio, which is essential for the detailed study of the beam dynamics.

AB - We describe the first measurement of an electron beam size in the accelerator test facility damping ring at KEK with a laser wire beam profile monitor. This monitor is based upon the Compton scattering process of electrons with a laser light target, which is produced by injecting a cw laser beam into a Fabry-Pérot optical cavity. We have observed clear signals of the Compton scattered photons and confirmed that the observed energy spectrum as well as the count rate agree with the expected ones. From the measurement, we have deduced the vertical beam size σb to be 9.8 ± 1.1 ± 0.4 μm, where the first (second) error represents statistical (systematic) uncertainty. Various improvements are in progress to enhance the signal-to-noise ratio, which is essential for the detailed study of the beam dynamics.

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Measurement of an electron beam size with a laser wire beam profile monitor

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