| Paper |
Title |
Page |
| MOPC001 |
Final Results from the Novel Multiturn Extraction Studies at CERN Proton Synchrotron
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117 |
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- M. Giovannozzi, R. Cappi, S.S. Gilardoni, M. Martini, E. Métral, R.R. Steerenberg
CERN, Geneva
- A.-S. Müller
FZK, Karlsruhe
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Recently a novel approach to perform multi-turn extraction was proposed based on beam splitting in the transverse phase space by means of trapping inside stable islands. An experimental campaign was launched since the year 2002 to assess the feasibility of such an extraction scheme at the CERN Proton Synchrotron. During the year 2004 run, a high-intensity single-bunch beam was successfully split and the generated beamlets separated without any measurable losses. The latest experimental results are presented and discussed in details in this paper. These achievements represent a substantial step forward with respect to what achieved in previous years, as only a low-intensity bunch could be split without losses. Furthermore, this opens the possibility of using such a technique for routine operation with the high-intensity proton beams required for the planned CERN Neutrino to Gran Sasso Project.
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| MOPC003 |
Benchmarking of Simulation Codes Based on the Montague Resonance in the CERN Proton Synchrotron
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330 |
| |
- I. Hofmann, G. Franchetti
GSI, Darmstadt
- J.F. Amundson, P. Spentzouris
Fermilab, Batavia, Illinois
- S.M. Cousineau, J.A. Holmes
ORNL, Oak Ridge, Tennessee
- M. Giovannozzi, E. Métral
CERN, Geneva
- F.W. Jones
TRIUMF, Vancouver
- A.U. Luccio
BNL, Upton, Long Island, New York
- S. Machida
KEK, Ibaraki
- J. Qiang, R.D. Ryne
LBNL, Berkeley, California
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Experimental data on emittance exchange by the space charge driven ‘‘Montague resonance'' have been obtained at the CERN Proton Synchrotron in 2002-04 as a function of the working point. These data are used to advance the benchmarking of major simulation codes (ACCSIM, IMPACT, MICROMAP, ORBIT, SIMBAD, SIMPSONS, SYNERGIA) currently employed world-wide in the design or performance improvement of high intensity circular accelerators. In this paper we summarize the experimental findings and compare them with the first three steps of simulation results of the still progressing work.
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| TPAT014 |
A Novel Technique for Multiturn Injection in a Circular Accelerator Using Stable Islands in Transverse Phase Space
|
1377 |
| |
- M. Giovannozzi, J. Morel
CERN, Geneva
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By applying a time-reversal to the multiturn extraction recently proposed a novel approach to perform multiturn injection is proposed. It is based on the use of stable islands of the horizontal phase space generated by means of sextupoles and octupoles. A particle beam can be injected into stable islands of phase space, and then a slow tune variation allows merging the beam trapped inside the islands. The results of numerical simulations will be presented and discussed in details, showing how to use the proposed approach to generate hollow bunches.
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| RPAE037 |
Operation with a Low Emittance Optics at ANKA
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2467 |
| |
- E. Huttel, A. Ben Kalefa, I. Birkel, A.-S. Müller, P. Wesolowski
FZK, Karlsruhe
- M. Giovannozzi
CERN, Geneva
- M. Pont, F. Pérez
CELLS, Bellaterra (Cerdanyola del Vallès)
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ANKA is a synchrotron light source operating in an energy range from 0.5 to 2.5 GeV. The electron storage ring at ANKA is designed as a variation of an eightfold Double Bend Achromat structure. Since its commissioning the facility has been operated with zero dispersion in the long straight sections resulting in an emittance of about 100 nmrad. Since mid 2004 ANKA is operated with dispersion distributed over the complete ring thus reducing the emittance to 40 nmrad. In the course of the re-design of the storage ring optics a compensation of higher order field components leads to a visibly increased momentum acceptance. Optics calculations and measurements as well as operational experience will be discussed.
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