IPAC2017 - List of Authors (Plouviez, E.)

Paper	Title	Page
MOPIK063	Non-Linear Kickers Using Eddy Current Screens and Application to the ESRF	670
	S.M. White, M. Dubrulle, L. Farvacque, P. Henrissat, G. Le Bec, E. Plouviez, P. Raimondi, C. Richard ESRF, Grenoble, France
	The ESRF storage ring injection and accumulation is performed using standard 4-kickers bump and septum magnet. Sextupoles are located within the injection bump leading to significant bump non-closure during the ramp-up and ramp-down and optics distorsion for both stored and injected beam. Introducing non-linearities in the kickers allows for compensation of the perturbation from these sextupoles. We report on the feasibility of adding eddy current screens to a standard kicker magnet design to generate a non-linear field and its recent application to mitigate the injection perturbations at the ESRF.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPIK063
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TUPIK041	Cleaning of Parasitic Bunches for Time Structured Filling of the ESRF Storage Ring During Top Up Operation	1774
	E. Plouviez, L. Farvacque, J.M. Koch, T.P. Perron, B. Roche, K.B. Scheidt, R. Versteegen, S.M. White ESRF, Grenoble, France
	In order to generate time structured synchrotron radiation the 6GeV ESRF storage ring can be operated with 16 buckets filled with 15nC separated by 16 gaps of 61 nearly perfectly empty buckets. The contrast required by some users between the population of the main and empty buckets is 10¹¹. In order to obtain these empty buckets some RF knock out (cleaning) of the parasitic bunches is needed. Until now this cleaning was performed on the beam stored in the storage ring. Recently we have started to deliver this 16 bunches filling in a so called top up mode, drastically increasing the rate of the storage ring refills. In this top up mode it is very penalizing to perform the cleaning in the storage ring so we are now performing it in the booster synchrotron which accelerates the 200MeV beam coming from the linac up to 6GeV. We describe the set up used to perform the cleaning in the booster and all the measurement and experiments performed in order to correctly understand the origin of the unwanted electrons populating buckets of the gaps separating the 16 main bunches.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK041
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Non-Linear Kickers Using Eddy Current Screens and Application to the ESRF

670

S.M. White, M. Dubrulle, L. Farvacque, P. Henrissat, G. Le Bec, E. Plouviez, P. Raimondi, C. Richard
ESRF, Grenoble, France

The ESRF storage ring injection and accumulation is performed using standard 4-kickers bump and septum magnet. Sextupoles are located within the injection bump leading to significant bump non-closure during the ramp-up and ramp-down and optics distorsion for both stored and injected beam. Introducing non-linearities in the kickers allows for compensation of the perturbation from these sextupoles. We report on the feasibility of adding eddy current screens to a standard kicker magnet design to generate a non-linear field and its recent application to mitigate the injection perturbations at the ESRF.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPIK063

Export •

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

TUPIK041

Cleaning of Parasitic Bunches for Time Structured Filling of the ESRF Storage Ring During Top Up Operation

1774

E. Plouviez, L. Farvacque, J.M. Koch, T.P. Perron, B. Roche, K.B. Scheidt, R. Versteegen, S.M. White
ESRF, Grenoble, France

In order to generate time structured synchrotron radiation the 6GeV ESRF storage ring can be operated with 16 buckets filled with 15nC separated by 16 gaps of 61 nearly perfectly empty buckets. The contrast required by some users between the population of the main and empty buckets is 10¹¹. In order to obtain these empty buckets some RF knock out (cleaning) of the parasitic bunches is needed. Until now this cleaning was performed on the beam stored in the storage ring. Recently we have started to deliver this 16 bunches filling in a so called top up mode, drastically increasing the rate of the storage ring refills. In this top up mode it is very penalizing to perform the cleaning in the storage ring so we are now performing it in the booster synchrotron which accelerates the 200MeV beam coming from the linac up to 6GeV. We describe the set up used to perform the cleaning in the booster and all the measurement and experiments performed in order to correctly understand the origin of the unwanted electrons populating buckets of the gaps separating the 16 main bunches.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK041

Export •

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