IPAC2018 - List of Authors (Ohkuma, H.)

Paper	Title	Page
THPMF069	Perturbation to Stored Beam by Pulse Sextupole Magnet and Disturbance of the Sextupole Magnetic Field in Aichi Synchrotron Radiation Center	4232
	A. Mochihashi KIT, Eggenstein-Leopoldshafen, Germany M. Fujimoto, M. Katoh UVSOR, Okazaki, Japan M. Hosaka, M. Hosaka, Y. Takashima, Y. Takashima, K. Y. Yamamura Nagoya University, Nagoya, Japan M. Hosaka, H. Ohkuma, Y. Takashima Aichi Synchrotron Radiation Center, Aichi, Japan M. Katoh Sokendai - Okazaki, Okazaki, Aichi, Japan H. Ohkuma JASRI/SPring-8, Hyogo-ken, Japan
	In the Aichi synchrotron radiation center (Aichi-SR), a pulse sextupole magnet (PSM) has been installed as a pulse magnet for beam injection. This leads to the injection scheme without using a bump orbit and stable supply of the synchrotron radiation. In Aichi-SR we have performed usual injection scheme with 4 kicker magnets and making the bump. Because the circumference of the Aichi-SR is only 72 m, 3 beam lines are inside the bump. The Aichi-SR has performed top-up operation since its public open, so it is a crucial subject to eliminate the disturbance of the synchrotron radiation during the injection. We have installed the PSM in 2015 and developed the beam study continuously. At present, however, a perturbation to the stored beam by the PSM still has been observed and is not acceptable. We have performed beam diagnostic experiment and concluded that an additional dipole kick affects the beam. From the magnetic field measurement data, we have discussed the source of the additional kick; most likely is an eddy current on the Ti coating inside the ceramics duct of the PSM. The beam diagnostics experiment and the magnetic field measurement will be discussed in the presentation. Present affiliation of the first auther : Karlsruhe Institute of Technology
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPMF069
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Paper

Title

Page

Perturbation to Stored Beam by Pulse Sextupole Magnet and Disturbance of the Sextupole Magnetic Field in Aichi Synchrotron Radiation Center

4232

A. Mochihashi
KIT, Eggenstein-Leopoldshafen, Germany
M. Fujimoto, M. Katoh
UVSOR, Okazaki, Japan
M. Hosaka, M. Hosaka, Y. Takashima, Y. Takashima, K. Y. Yamamura
Nagoya University, Nagoya, Japan
M. Hosaka, H. Ohkuma, Y. Takashima
Aichi Synchrotron Radiation Center, Aichi, Japan
M. Katoh
Sokendai - Okazaki, Okazaki, Aichi, Japan
H. Ohkuma
JASRI/SPring-8, Hyogo-ken, Japan

In the Aichi synchrotron radiation center (Aichi-SR), a pulse sextupole magnet (PSM) has been installed as a pulse magnet for beam injection. This leads to the injection scheme without using a bump orbit and stable supply of the synchrotron radiation. In Aichi-SR we have performed usual injection scheme with 4 kicker magnets and making the bump. Because the circumference of the Aichi-SR is only 72 m, 3 beam lines are inside the bump. The Aichi-SR has performed top-up operation since its public open, so it is a crucial subject to eliminate the disturbance of the synchrotron radiation during the injection. We have installed the PSM in 2015 and developed the beam study continuously. At present, however, a perturbation to the stored beam by the PSM still has been observed and is not acceptable. We have performed beam diagnostic experiment and concluded that an additional dipole kick affects the beam. From the magnetic field measurement data, we have discussed the source of the additional kick; most likely is an eddy current on the Ti coating inside the ceramics duct of the PSM. The beam diagnostics experiment and the magnetic field measurement will be discussed in the presentation.
Present affiliation of the first auther : Karlsruhe Institute of Technology

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPMF069

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)