Cyclotrons2013 - List of Keywords (synchrotron)

Paper	Title	Other Keywords	Page
MO2PB01	What We Learned from EMMA	acceleration, lattice, resonance, injection	14
	S. Machida STFC/RAL/ASTeC, Chilton, Didcot, Oxon, United Kingdom
	Since the demonstration of acceleration in 2011, the study of EMMA aims for more detailed and quantitative understanding of a linear non-scaling FFAG. The talk will summarise the beam study for the last couple of years which includes effects of resonance crossing, a novel idea of COD correction, etc.
	Slides MO2PB01 [8.447 MB]

MOPPT003	20 Years of JULIC Operation as COSY's Injector Cyclotron	cyclotron, ion, septum, ion-source	34
	R. Gebel, R. Brings, O. Felden, R. Maier, S. Mey, D. Prasuhn FZJ, Jülich, Germany
	The accelerator facility COSY/Jülich is based upon availability and performance of the isochronous cyclotron JULIC as pre-accelerator of the 2.88 GeV cooler synchrotron. Since 1993 the cyclotron provides beams in 24/7 operation for more than 6500 hours/year on average. The cyclotron has been in operation since commissioning in 1968 and has reached in total 260000 hours of operation. JULIC provides routinely polarized and unpolarized negatively charged light ions for COSY experiments in the field of fundamental research in hadron, particle and nuclear physics. The ongoing program at the facility foresees increasing usage as a test facility for accelerator research and detector development for realization of FAIR, and other novel experiments on the road map of the Helmholtz Association and international collaborations. In parallel to the operation for COSY the cyclotron beam is used for irradiation and fundamental nuclide production for research purposes. A brief overview of activities at the Forschungszentrum Jülich, the cooler synchrotron COSY and its injector cyclotron JULIC, with focus on recent technical developments, will be presented.

MOPPT019	A Compact, GeV, High-Intensity (CW) Racetrack FFAG	cyclotron, acceleration, focusing, extraction	73
	C. Johnstone Fermilab, Batavia, Illinois, USA M. Berz, K. Makino MSU, East Lansing, Michigan, USA P. Snopok Illinois Institute of Technology, Chicago, Illinois, USA
	High-intensity and energy compact proton accelerators, especially those requiring milliamp currents, imply both CW operation and high acceleration gradients to mitigate losses. Above a few hundred MeV, losses must be under a per cent to avoid massive shielding and unmanageable activation. As relativistic energies are approached, the orbit separation on consecutive acceleration turns decreases for isochronous performance and to achieve higher acceleration gradients and orbit separation, RF modules must be employed rather than Dees, resulting in the larger separated-sector cyclotron footprint. However, the addition of strong focusing – with reversed gradients to capture both transverse planes – to conventional cyclotron fields promote inclusion of long synchrotron-like straight sections and implementation of high-gradient RF, even SCRF. The nsFFAG design has evolved into a a recirculating linear accelerator form with FFAG arcs. An ultra-compact, 0.2 – 1 GeV RLA FFAG design will be discussed (with a 3m x 5-6m footprint) that uses SC RF cryomodules achieving complete orbit separation at extraction and CW operation.

WEPPT015	Study of Beam Capture in Compact Synchrocyclotron	acceleration, synchro-cyclotron, injection, cyclotron	353
	S.A. Kostromin, G.A. Karamysheva, N.A. Morozov, E. Samsonov JINR, Dubna, Moscow Region, Russia
	Capture efficiency and main aspects of the beam dynamics during first turns and in a period of one synchrotron oscillation were studied in synchrocyclotron with driving magnetic field of ~5 Tesla. Corresponding simulations of the beam motion were done by means of numerical integration of the full equations of motion in the electro-magnetic field of accelerator. Main physical parameters for input data were taken similar to them for IBA S2C2.

WEPPT031	High Intensity Beam Studies Using the KURRI FFAGs	scattering, emittance, space-charge, injection	387
	S. Machida, C. Gabor, D.J. Kelliher, C.R. Prior, C.T. Rogers, S.L. Sheehy STFC/RAL/ASTeC, Chilton, Didcot, Oxon, United Kingdom Y. Ishi, J.-B. Lagrange, Y. Mori, T. Uesugi Kyoto University, Research Reactor Institute, Osaka, Japan
	Increasing the repetition rate of FFAG accelerators is one way of obtaining high average beam current. However, in order to achieve beam powers of up to 10 MW for applications like ADSR, the number of particles per bunch has to be approximately the same order in an FFAG as in a high power synchrotron. Collective effects such as space charge then become crucial issues. To understand high current beam behaviour in FFAGs, an international collaboration has been established to carry out an experimental programme using the FFAGs at Kyoto University's Research Reactor Institute, KURRI. The goal is to demonstrate acceleration of high bunch charge and identify the fundamental limitations. In this paper, we will show simulation results toward the first beam experiment which is planned for later in 2013.

WE4PB02	An All-Purpose Accelerator Code, Zgoubi	simulation, radiation, damping, polarization	426
	F. Méot BNL, Upton, Long Island, New York, USA
	Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. The ray-tracing code Zgoubi* has long been 6D-tracking through all possible types of fixed field rings*, including, recently, 6D transmission from injection-up to extraction-down in high power cyclotrons in the frame of ADS-Reactor R/D. This is to be added to the long exploited many other capabilities of the code as spin transport, in-flight decay, synchrotron radiation energy loss, etc. An overview will be given, including recent space-charge developments, with illustration including recent high power cyclotron applications. http://sourceforge.net/projects/zgoubi/, http://www.osti.gov/bridge/basicsearch.jsp **6-D beam dynamics simulations in FFAGs, F. Meot, ICFA Beam Dyn. Newslett.43:44-50 (2007)
	Slides WE4PB02 [4.414 MB]

Paper

Title

Other Keywords

Page

MO2PB01

What We Learned from EMMA

acceleration, lattice, resonance, injection

14

S. Machida
STFC/RAL/ASTeC, Chilton, Didcot, Oxon, United Kingdom

Since the demonstration of acceleration in 2011, the study of EMMA aims for more detailed and quantitative understanding of a linear non-scaling FFAG. The talk will summarise the beam study for the last couple of years which includes effects of resonance crossing, a novel idea of COD correction, etc.

Slides MO2PB01 [8.447 MB]

MOPPT003

20 Years of JULIC Operation as COSY's Injector Cyclotron

cyclotron, ion, septum, ion-source

34

R. Gebel, R. Brings, O. Felden, R. Maier, S. Mey, D. Prasuhn
FZJ, Jülich, Germany

The accelerator facility COSY/Jülich is based upon availability and performance of the isochronous cyclotron JULIC as pre-accelerator of the 2.88 GeV cooler synchrotron. Since 1993 the cyclotron provides beams in 24/7 operation for more than 6500 hours/year on average. The cyclotron has been in operation since commissioning in 1968 and has reached in total 260000 hours of operation. JULIC provides routinely polarized and unpolarized negatively charged light ions for COSY experiments in the field of fundamental research in hadron, particle and nuclear physics. The ongoing program at the facility foresees increasing usage as a test facility for accelerator research and detector development for realization of FAIR, and other novel experiments on the road map of the Helmholtz Association and international collaborations. In parallel to the operation for COSY the cyclotron beam is used for irradiation and fundamental nuclide production for research purposes. A brief overview of activities at the Forschungszentrum Jülich, the cooler synchrotron COSY and its injector cyclotron JULIC, with focus on recent technical developments, will be presented.

MOPPT019

A Compact, GeV, High-Intensity (CW) Racetrack FFAG

cyclotron, acceleration, focusing, extraction

73

C. Johnstone
Fermilab, Batavia, Illinois, USA
M. Berz, K. Makino
MSU, East Lansing, Michigan, USA
P. Snopok
Illinois Institute of Technology, Chicago, Illinois, USA

High-intensity and energy compact proton accelerators, especially those requiring milliamp currents, imply both CW operation and high acceleration gradients to mitigate losses. Above a few hundred MeV, losses must be under a per cent to avoid massive shielding and unmanageable activation. As relativistic energies are approached, the orbit separation on consecutive acceleration turns decreases for isochronous performance and to achieve higher acceleration gradients and orbit separation, RF modules must be employed rather than Dees, resulting in the larger separated-sector cyclotron footprint. However, the addition of strong focusing – with reversed gradients to capture both transverse planes – to conventional cyclotron fields promote inclusion of long synchrotron-like straight sections and implementation of high-gradient RF, even SCRF. The nsFFAG design has evolved into a a recirculating linear accelerator form with FFAG arcs. An ultra-compact, 0.2 – 1 GeV RLA FFAG design will be discussed (with a 3m x 5-6m footprint) that uses SC RF cryomodules achieving complete orbit separation at extraction and CW operation.

WEPPT015

Study of Beam Capture in Compact Synchrocyclotron

acceleration, synchro-cyclotron, injection, cyclotron

353

S.A. Kostromin, G.A. Karamysheva, N.A. Morozov, E. Samsonov
JINR, Dubna, Moscow Region, Russia

Capture efficiency and main aspects of the beam dynamics during first turns and in a period of one synchrotron oscillation were studied in synchrocyclotron with driving magnetic field of ~5 Tesla. Corresponding simulations of the beam motion were done by means of numerical integration of the full equations of motion in the electro-magnetic field of accelerator. Main physical parameters for input data were taken similar to them for IBA S2C2.

WEPPT031

High Intensity Beam Studies Using the KURRI FFAGs

scattering, emittance, space-charge, injection

387

S. Machida, C. Gabor, D.J. Kelliher, C.R. Prior, C.T. Rogers, S.L. Sheehy
STFC/RAL/ASTeC, Chilton, Didcot, Oxon, United Kingdom
Y. Ishi, J.-B. Lagrange, Y. Mori, T. Uesugi
Kyoto University, Research Reactor Institute, Osaka, Japan

Increasing the repetition rate of FFAG accelerators is one way of obtaining high average beam current. However, in order to achieve beam powers of up to 10 MW for applications like ADSR, the number of particles per bunch has to be approximately the same order in an FFAG as in a high power synchrotron. Collective effects such as space charge then become crucial issues. To understand high current beam behaviour in FFAGs, an international collaboration has been established to carry out an experimental programme using the FFAGs at Kyoto University's Research Reactor Institute, KURRI. The goal is to demonstrate acceleration of high bunch charge and identify the fundamental limitations. In this paper, we will show simulation results toward the first beam experiment which is planned for later in 2013.

WE4PB02

An All-Purpose Accelerator Code, Zgoubi

simulation, radiation, damping, polarization

426

F. Méot
BNL, Upton, Long Island, New York, USA

Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.
The ray-tracing code Zgoubi* has long been 6D-tracking through all possible types of fixed field rings**, including, recently, 6D transmission from injection-up to extraction-down in high power cyclotrons in the frame of ADS-Reactor R/D. This is to be added to the long exploited many other capabilities of the code as spin transport, in-flight decay, synchrotron radiation energy loss, etc. An overview will be given, including recent space-charge developments, with illustration including recent high power cyclotron applications.
*http://sourceforge.net/projects/zgoubi/, http://www.osti.gov/bridge/basicsearch.jsp
**6-D beam dynamics simulations in FFAGs, F. Meot, ICFA Beam Dyn. Newslett.43:44-50 (2007)

Slides WE4PB02 [4.414 MB]