IPAC2017 - List of Authors (Egawa, K.)

Paper	Title	Page
WEPIK007	Optics Design and Observation for the Beam Abort System in SuperKEKB HER	2922
	N. Iida, K. Egawa, Y. Enomoto, Y. Funakoshi, M. Kikuchi, T. Mimashi, Y. Ohnishi, K. Oide, Y. Suetsugu KEK, Ibaraki, Japan
	In the first commissioning of SuperKEKB, which is 'Phase 1', the new abort system is tested in the High Energy Ring (HER). There is a risk that aborted beams with low emittance and high current may destroy the window for extraction from beam pipe. In order to enlarge the aborted beam at the window, quadrupole field is applied only for the aborted beam. In the Low Energy Ring (LER), quadrupole pulsed magnets will be installed to enlarge the aborted beam, and in the HER, a pair of identical sextupole magnets is installed between the abort kickers and the extraction window. These sextrupole magnets are connected by I or 'I transformation to cancel the geometrical nonlinearity for the stored beam in the ring. This paper will report the optics design for the abort system of the HER as well as the observation of the aborted beam.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPIK007
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WEPIK010	Commissioning Status of SuperKEKB Main Ring Magnet System	2933
	M. Masuzawa, T. Adachi, K. Egawa, T. Kawamoto, S. Nakamura, Y. Ohsawa, T. Oki, R. Sugahara, R. Ueki KEK, Ibaraki, Japan
	SuperKEKB is an electron-positron collider, which aims for the very high peak luminosity of 8x10³⁵ cm^-2s^-1 , 40 times higher than that of KEKB. The SuperKEKB Main Ring (MR) system is very large, consisting of more than 1700 water-cooled normal-conducting magnets and about 900 air-cooled normal-conducting magnets. More than 400 magnets and power supplies were newly fabricated, tested and installed for SuperKEKB Phase I beam operation. The MR magnet system worked well, which contributed greatly to the smooth start-up of the MR. Commissioning status of the MR magnet system during SuperKEKB Phase I operation will be reported. Some problems resulting in beam abort will also be reported.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPIK010
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Paper

Title

Page

Optics Design and Observation for the Beam Abort System in SuperKEKB HER

2922

N. Iida, K. Egawa, Y. Enomoto, Y. Funakoshi, M. Kikuchi, T. Mimashi, Y. Ohnishi, K. Oide, Y. Suetsugu
KEK, Ibaraki, Japan

In the first commissioning of SuperKEKB, which is 'Phase 1', the new abort system is tested in the High Energy Ring (HER). There is a risk that aborted beams with low emittance and high current may destroy the window for extraction from beam pipe. In order to enlarge the aborted beam at the window, quadrupole field is applied only for the aborted beam. In the Low Energy Ring (LER), quadrupole pulsed magnets will be installed to enlarge the aborted beam, and in the HER, a pair of identical sextupole magnets is installed between the abort kickers and the extraction window. These sextrupole magnets are connected by I or 'I transformation to cancel the geometrical nonlinearity for the stored beam in the ring. This paper will report the optics design for the abort system of the HER as well as the observation of the aborted beam.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPIK007

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

WEPIK010

Commissioning Status of SuperKEKB Main Ring Magnet System

2933

M. Masuzawa, T. Adachi, K. Egawa, T. Kawamoto, S. Nakamura, Y. Ohsawa, T. Oki, R. Sugahara, R. Ueki
KEK, Ibaraki, Japan

SuperKEKB is an electron-positron collider, which aims for the very high peak luminosity of 8x10³⁵ cm^-2s^-1 , 40 times higher than that of KEKB. The SuperKEKB Main Ring (MR) system is very large, consisting of more than 1700 water-cooled normal-conducting magnets and about 900 air-cooled normal-conducting magnets. More than 400 magnets and power supplies were newly fabricated, tested and installed for SuperKEKB Phase I beam operation. The MR magnet system worked well, which contributed greatly to the smooth start-up of the MR. Commissioning status of the MR magnet system during SuperKEKB Phase I operation will be reported. Some problems resulting in beam abort will also be reported.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPIK010

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