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2002•Physical Review LettersRequires access

Extremely Low Vertical-Emittance Beam in the Accelerator Test Facility at KEK

Kiyoshi Kubo, M. Akemoto, Scott D. Anderson, T. Aoki, Sakae Araki, Karl LF Bane, Piotr Blum, John N. Corlett, Katsuhiro Dobashi, P. Emma, J. Frisch, Masafumi Fukuda, Z. Y. Guo, K. Hasegawa, H. Hayano, T. Higo, Akiko Higurashi, Y. Honda, T. Iimura, Takeshi Imai, K. Jobe, S. Kamada, P. Karataev, Shigeru Kashiwagi, E. Kim, Tomoaki Kobuki, Theofilos Kotseroglou, Y. Kurihara, M. Kuriki, R. Kuroda, S. Kuroda, T. Lee, Xi Luo, Douglas J. McCormick, B. McKee, T. Mimashi, Michiko G. Minty, Toshiya Muto, T. Naito, G. A. Naumenko, J. Nelson, M.N. Nguyen, K. Oide, T. Okugi, T. Omori, T. Oshima, GX Pei, Alexander Petrovich Potylitsyn, Q. Qin, Tor O. Raubenheimer, Marc C Ross, Hiroshi Sakai, Izumi SAKAI, F. Schmidt, T. Slaton, H. Smith, S. Rocksborough Smith, T. I. Smith, T. Suzuki, M. Takano, S. Takeda, N. Terunuma, N. Toge, James Turner, Junji Urakawa, V. Vogel, Mark D Woodley, J. Yocky, Andrew Young, Frank Zimmermann

Open publisher page 52 citations

Abstract

Electron beams with the lowest, normalized transverse emittance recorded so far were produced and confirmed in single-bunch-mode operation of the Accelerator Test Facility at KEK. We established a tuning method of the damping ring which achieves a small vertical dispersion and small x-y orbit coupling. The vertical emittance was less than 1% of the horizontal emittance. At the zero-intensity limit, the vertical normalized emittance was less than 2.8 x 10(-8) rad m at beam energy 1.3 GeV. At high intensity, strong effects of intrabeam scattering were observed, which had been expected in view of the extremely high particle density due to the small transverse emittance.

About this research paper

What this paper is about

Electron beams with the lowest, normalized transverse emittance recorded so far were produced and confirmed in single-bunch-mode operation of the Accelerator Test Facility at KEK. We established a tuning method of the damping ring which achieves a small vertical dispersion and small x-y orbit coupling. The vertical emittance was less than 1% of the horizontal emittance. At the zero-intensity limit, the vertical normalized emittance was less than 2.8 x 10(-8) rad m at beam energy 1.3 GeV. At high intensity, strong effects of intrabeam scattering were observed, which had been expected in view of the extremely high particle density due to the small transverse emittance.

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Available abstract

Electron beams with the lowest, normalized transverse emittance recorded so far were produced and confirmed in single-bunch-mode operation of the Accelerator Test Facility at KEK. We established a tuning method of the damping ring which achieves a small vertical dispersion and small x-y orbit coupling. The vertical emittance was less than 1% of the horizontal emittance. At the zero-intensity limit, the vertical normalized emittance was less than 2.8 x 10(-8) rad m at beam energy 1.3 GeV. At high intensity, strong effects of intrabeam scattering were observed, which had been expected in view of the extremely high particle density due to the small transverse emittance.

Key concepts: Thermal emittance, Physics, Beam emittance, Transverse plane, Beam (structure), Particle accelerator, Scattering, Storage ring

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