ICALEPCS2017 - List of Authors (Kaji, H.)

Paper	Title	Page
TUCPL02	Synchronized Timing and Control System Construction of SuperKEKB Positron Damping Ring	229
	H. Sugimura, K. Furukawa, H. Kaji, F. Miyahara, T.T. Nakamura, Y. Ohnishi, S. Sasaki, M. Satoh KEK, Ibaraki, Japan
	The KEK electron/positron injector chain delivers beams for particle physics and photon science experiments. A damping ring has been constructed at the middle of the linac to generate a positron beam with sufficiently low emittance to support a 40-fold higher luminosity in the SuperKEKB asymmetric collider over the previous project of KEKB, in order to increase our understanding of flavour physics. A timing and control system for the damping ring is under construction to enable the timing synchronization and beam bucket selection between the linac, the positron damping ring and the SuperKEKB main ring. It should manage precise timing down to several picoseconds for the beam energy and bunch compression systems. Besides precise timing controls to receive and transmit positron beams, it has to meet local analysis requirements in order to measure beam properties precisely with changing the RF frequency. It is incorporating the event timing control modules from MRF and SINAP.
	Talk as video stream: https://youtu.be/BMAJimbEQB4
	Slides TUCPL02 [0.482 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-TUCPL02
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THMPL02	Upgrade of KEK Electron/positron Linac Control System for the Both SuperKEKB and Light Sources	1257
	K. Furukawa, Y. Enomoto, H. Kaji, H. Katagiri, M. Kurashina, K. Mikawa, T. Miura, F. Miyahara, T. Natsui, I. Satake, M. Satoh, Y. Seimiya, H. Sugimura, T. Suwada KEK, Ibaraki, Japan
	KEK injector linac has delivered electrons and positrons for particle physics and photon science experiments for more than 30 years. It is being upgraded for the SuperKEKB project, which aims at a 40-fold increase in luminosity over the previous project of KEKB, in order to increase our understanding of flavour physics. This project requires ten-times smaller emittance and five-times larger current in injection beam from the injector. And many hardware components are being tested and installed. Even during the 6-year upgrade, it was requested to inject beams into light sources storage rings of PF and PF-AR. Furthermore, the beam demanding approaches from those storage rings are different. SuperKEKB would demand highest performance, and unscheduled interruption may be acceptable if the performance would be improved. However, light sources expect a stable operation without any unscheduled break, mainly because most users run experiments for a short period. In order to deal with the both requirements several measures are taken for operation, construction and maintenance strategy including simultaneous top-up injections.
	Slides THMPL02 [2.421 MB]
	Poster THMPL02 [6.998 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THMPL02
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Synchronized Timing and Control System Construction of SuperKEKB Positron Damping Ring

229

H. Sugimura, K. Furukawa, H. Kaji, F. Miyahara, T.T. Nakamura, Y. Ohnishi, S. Sasaki, M. Satoh
KEK, Ibaraki, Japan

The KEK electron/positron injector chain delivers beams for particle physics and photon science experiments. A damping ring has been constructed at the middle of the linac to generate a positron beam with sufficiently low emittance to support a 40-fold higher luminosity in the SuperKEKB asymmetric collider over the previous project of KEKB, in order to increase our understanding of flavour physics. A timing and control system for the damping ring is under construction to enable the timing synchronization and beam bucket selection between the linac, the positron damping ring and the SuperKEKB main ring. It should manage precise timing down to several picoseconds for the beam energy and bunch compression systems. Besides precise timing controls to receive and transmit positron beams, it has to meet local analysis requirements in order to measure beam properties precisely with changing the RF frequency. It is incorporating the event timing control modules from MRF and SINAP.

Talk as video stream: https://youtu.be/BMAJimbEQB4

Slides TUCPL02 [0.482 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-TUCPL02

Export •

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

THMPL02

Upgrade of KEK Electron/positron Linac Control System for the Both SuperKEKB and Light Sources

1257

K. Furukawa, Y. Enomoto, H. Kaji, H. Katagiri, M. Kurashina, K. Mikawa, T. Miura, F. Miyahara, T. Natsui, I. Satake, M. Satoh, Y. Seimiya, H. Sugimura, T. Suwada
KEK, Ibaraki, Japan

KEK injector linac has delivered electrons and positrons for particle physics and photon science experiments for more than 30 years. It is being upgraded for the SuperKEKB project, which aims at a 40-fold increase in luminosity over the previous project of KEKB, in order to increase our understanding of flavour physics. This project requires ten-times smaller emittance and five-times larger current in injection beam from the injector. And many hardware components are being tested and installed. Even during the 6-year upgrade, it was requested to inject beams into light sources storage rings of PF and PF-AR. Furthermore, the beam demanding approaches from those storage rings are different. SuperKEKB would demand highest performance, and unscheduled interruption may be acceptable if the performance would be improved. However, light sources expect a stable operation without any unscheduled break, mainly because most users run experiments for a short period. In order to deal with the both requirements several measures are taken for operation, construction and maintenance strategy including simultaneous top-up injections.

Slides THMPL02 [2.421 MB]

Poster THMPL02 [6.998 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2017-THMPL02

Export •

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