eeFACT2016 - List of Keywords (kicker)

Paper	Title	Other Keywords	Page
TUT2H4	Top-up Injection Schemes for HEPS	ion, injection, cavity, operation	85
	Z. Duan, J. Chen, Y. Jiao, Y.M. Peng, Q.Y. Wang, G. Xu, P. Zhang IHEP, Beijing, People's Republic of China
	Funding: Natural Science Foundation of China (No.11605212) Top-up injection has become standard mode of operation for most third generation light sources, and has also been suc- cesfully applied in electron-positron circular colliders like KEKB and PEP-II. For next generation ultra-low emittance storage rings approaching the diffraction limit of X-rays, take the High Energy Photon Source (HEPS) for example, top-up injection is a basic requirement but non-trivial to im- plement. The very small dynamic aperture is insufficient for traditional off-axis injection scheme, instead, a novel on-axis injection scheme was recently proposed for HEPS, based on RF gymnastics of a double-frequency RF system. This paper will describe the physical mechanism of this scheme, related RF issues, and the implications for top-up injection.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-TUT2H4
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TUT3AH9	Feedback Systems for FCC-ee	ion, feedback, damping, pick-up	136
	A. Drago INFN/LNF, Frascati (Roma), Italy
	In this paper, some preliminary considerations on the feedback systems for FCC-ee are developed. Bunch-by-bunch feedback systems have been de-signed in the last years for other e⁺/e⁻ colliders like PEP-II, KEKB, DAΦNE, SuperB and SuperKEKB. In all these cases, similar approaches have been implement-ed, even if some design variations have been suitable or necessary for different reasons. Bunch-by-bunch feedback systems are based on the concept that the barycenter of each bunch moves with harmonic motion around the equilibrium point in three planes (L, H, V). The feedback copes with the forcing excitation by producing damping correction for each individual bunch. This is possible managing every single bunch by a dedicated processing channel in real time. For FCC-ee the very high number of stored bunches re-quires much more power in terms of processing capa-bility for the feedback systems. Ring length (100 Km) and very low fractional tunes must be also considered requiring for a more effective strategy in the feedback system design.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-TUT3AH9
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WET1H3	Beam Instrumentation in SuperKEKB	ion, feedback, detector, operation	164
	H. Fukuma KEK, Ibaraki, Japan
	SuperKEKB is an upgraded collider of the KEK B-factory (KEKB). Its phase 1 operation has just finished in this June. A BPM system consists of super heterodyne detectors, turn by turn log-ratio detectors with fast gates and detectors for the orbit feedback to maintain stable collision. New X-ray beam profile monitors with multi-slit masks are installed. The bunch-by-bunch feedback system is upgraded using low noise frontend electronics and new 12 bits iGp digital filters. A status of instrumentations of SuperKEKB will be given in this talk.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-WET1H3
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WET3AH3	Extraction Line and Beam Dump for the Future Electron Positron Circular Collider	ion, extraction, collider, electron	188
	A. Apyan ANSL, Yerevan, Armenia K. Oide KEK, Ibaraki, Japan F. Zimmermann CERN, Geneva, Switzerland
	The conceptual design of an extraction line and beam dump for the future electron positron circular collider is presented. The proposed extraction line, consisting of abort kicker system, spoilers and beam diagnostics apparatus transports the electron and positron beams to the main beam dumps. The beam must be spread over a large surface in order not to damage the beam dump and the window, which separates the ring from the dump. The extraction line redistributes bunches at different locations on the face of beam dump. Monte Carlo simulations using FLUKA have been performed to estimate the distribution of energy deposition on the window and beam dump to find the optimal absorber and its dimensions.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-WET3AH3
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

TUT2H4

Top-up Injection Schemes for HEPS

ion, injection, cavity, operation

85

Z. Duan, J. Chen, Y. Jiao, Y.M. Peng, Q.Y. Wang, G. Xu, P. Zhang
IHEP, Beijing, People's Republic of China

Funding: Natural Science Foundation of China (No.11605212)
Top-up injection has become standard mode of operation for most third generation light sources, and has also been suc- cesfully applied in electron-positron circular colliders like KEKB and PEP-II. For next generation ultra-low emittance storage rings approaching the diffraction limit of X-rays, take the High Energy Photon Source (HEPS) for example, top-up injection is a basic requirement but non-trivial to im- plement. The very small dynamic aperture is insufficient for traditional off-axis injection scheme, instead, a novel on-axis injection scheme was recently proposed for HEPS, based on RF gymnastics of a double-frequency RF system. This paper will describe the physical mechanism of this scheme, related RF issues, and the implications for top-up injection.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-TUT2H4

Export •

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

TUT3AH9

Feedback Systems for FCC-ee

ion, feedback, damping, pick-up

136

A. Drago
INFN/LNF, Frascati (Roma), Italy

In this paper, some preliminary considerations on the feedback systems for FCC-ee are developed. Bunch-by-bunch feedback systems have been de-signed in the last years for other e⁺/e⁻ colliders like PEP-II, KEKB, DAΦNE, SuperB and SuperKEKB. In all these cases, similar approaches have been implement-ed, even if some design variations have been suitable or necessary for different reasons. Bunch-by-bunch feedback systems are based on the concept that the barycenter of each bunch moves with harmonic motion around the equilibrium point in three planes (L, H, V). The feedback copes with the forcing excitation by producing damping correction for each individual bunch. This is possible managing every single bunch by a dedicated processing channel in real time. For FCC-ee the very high number of stored bunches re-quires much more power in terms of processing capa-bility for the feedback systems. Ring length (100 Km) and very low fractional tunes must be also considered requiring for a more effective strategy in the feedback system design.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-TUT3AH9

Export •

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

WET1H3

Beam Instrumentation in SuperKEKB

ion, feedback, detector, operation

164

H. Fukuma
KEK, Ibaraki, Japan

SuperKEKB is an upgraded collider of the KEK B-factory (KEKB). Its phase 1 operation has just finished in this June. A BPM system consists of super heterodyne detectors, turn by turn log-ratio detectors with fast gates and detectors for the orbit feedback to maintain stable collision. New X-ray beam profile monitors with multi-slit masks are installed. The bunch-by-bunch feedback system is upgraded using low noise frontend electronics and new 12 bits iGp digital filters. A status of instrumentations of SuperKEKB will be given in this talk.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-WET1H3

Export •

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

WET3AH3

Extraction Line and Beam Dump for the Future Electron Positron Circular Collider

ion, extraction, collider, electron

188

A. Apyan
ANSL, Yerevan, Armenia
K. Oide
KEK, Ibaraki, Japan
F. Zimmermann
CERN, Geneva, Switzerland

The conceptual design of an extraction line and beam dump for the future electron positron circular collider is presented. The proposed extraction line, consisting of abort kicker system, spoilers and beam diagnostics apparatus transports the electron and positron beams to the main beam dumps. The beam must be spread over a large surface in order not to damage the beam dump and the window, which separates the ring from the dump. The extraction line redistributes bunches at different locations on the face of beam dump. Monte Carlo simulations using FLUKA have been performed to estimate the distribution of energy deposition on the window and beam dump to find the optimal absorber and its dimensions.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-WET3AH3

Export •

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