IBIC2015 - List of Authors (Peake, D.J.)

Paper	Title	Page
MOPB049	An Optical Intra-Bunch Instability Monitor for Short Electron Bunches	161
	T.G. Lucas, P.J. Giansiracusa, D.J. Peake, R.P. Rassool The University of Melbourne, Melbourne, Victoria, Australia M.J. Boland ASCo, Clayton, Victoria, Australia R.J. Steinhagen GSI, Darmstadt, Germany
	An improved understanding of intra-bunch instabilities in synchrotron light source electron bunches is crucial to overcoming the imposed limitations of the achievable intensity. A Multiband Instability Monitor, designed specifically for the short bunches of a synchrotron light source, has been developed to perform measurements of intra-bunch dynamics. The MIM performs real-time measurements at a diagnostic beamline using optical synchrotron radiation incident on a high speed photodetector. Three frequency bands up to 12 GHz were used to identify characteristic frequency signatures of intra-bunch instabilities. Mixed to baseband using RF detectors, these high frequency measurements can be performed without the need for similarly high frequency digitisers. This paper reports on the performance of the system at the Australian Synchrotron.
	Poster MOPB049 [0.928 MB]
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TUPB002	Fast Orbit Feedback System at SLSA	293
	Y.E. Tan, N.J. Basten, T.D. Cornall, E. Joseph Vettoor SLSA, Clayton, Australia A. Michalczyk ASCo, Clayton, Victoria, Australia D.J. Peake The University of Melbourne, Melbourne, Victoria, Australia
	Since the end of commissioning of the facility in 2006, implementing topup (completed 2012) and fast orbit feedback have been top priority upgrades to improve the stability of the light source for users. The fast orbit feedback system is currently being implemented and will be commissioned in 2016. The feedback system has a star topology with an FPGA based feedback processor at its core. The system will utilises the existing 98 Libera Electron beam position processors, with Libera Grouping for data aggregation, as the source of postion data at 10 kHz. The corrections are calculated in a Xilinx Vertex 6 FPGA and is transmitted to 14 corrector power supplies in the 14 sectors. These power supplies are six-channel bipolar 1 Ampere and have been developed by a local company. The corrector magnets are tertiary coils on the existing sextupole magnets in the storage ring. This report shall present the design, results of Simulink simulations, the current status of implementation and future plans.
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Paper

Title

Page

An Optical Intra-Bunch Instability Monitor for Short Electron Bunches

161

T.G. Lucas, P.J. Giansiracusa, D.J. Peake, R.P. Rassool
The University of Melbourne, Melbourne, Victoria, Australia
M.J. Boland
ASCo, Clayton, Victoria, Australia
R.J. Steinhagen
GSI, Darmstadt, Germany

An improved understanding of intra-bunch instabilities in synchrotron light source electron bunches is crucial to overcoming the imposed limitations of the achievable intensity. A Multiband Instability Monitor, designed specifically for the short bunches of a synchrotron light source, has been developed to perform measurements of intra-bunch dynamics. The MIM performs real-time measurements at a diagnostic beamline using optical synchrotron radiation incident on a high speed photodetector. Three frequency bands up to 12 GHz were used to identify characteristic frequency signatures of intra-bunch instabilities. Mixed to baseband using RF detectors, these high frequency measurements can be performed without the need for similarly high frequency digitisers. This paper reports on the performance of the system at the Australian Synchrotron.

Poster MOPB049 [0.928 MB]

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reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text, ※ RIS/RefMan, ※ EndNote (xml)

TUPB002

Fast Orbit Feedback System at SLSA

293

Y.E. Tan, N.J. Basten, T.D. Cornall, E. Joseph Vettoor
SLSA, Clayton, Australia
A. Michalczyk
ASCo, Clayton, Victoria, Australia
D.J. Peake
The University of Melbourne, Melbourne, Victoria, Australia

Since the end of commissioning of the facility in 2006, implementing topup (completed 2012) and fast orbit feedback have been top priority upgrades to improve the stability of the light source for users. The fast orbit feedback system is currently being implemented and will be commissioned in 2016. The feedback system has a star topology with an FPGA based feedback processor at its core. The system will utilises the existing 98 Libera Electron beam position processors, with Libera Grouping for data aggregation, as the source of postion data at 10 kHz. The corrections are calculated in a Xilinx Vertex 6 FPGA and is transmitted to 14 corrector power supplies in the 14 sectors. These power supplies are six-channel bipolar 1 Ampere and have been developed by a local company. The corrector magnets are tertiary coils on the existing sextupole magnets in the storage ring. This report shall present the design, results of Simulink simulations, the current status of implementation and future plans.

Export •

reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text, ※ RIS/RefMan, ※ EndNote (xml)