IPAC2011 - Table of Session: MOODB (Beam Dynamics and Electromagnetic Fields)

Paper

Title

Page

Dynamics of the IFMIF Very High-intensity Beam

53

P.A.P. Nghiem, R.D. Duperrier, A. Mosnier, D. Uriot
CEA/DSM/IRFU, France
N. Chauvin, O. Delferrière, W. Simeoni
CEA/IRFU, Gif-sur-Yvette, France
M. Comunian
INFN/LNL, Legnaro (PD), Italy
C. Oliver
CIEMAT, Madrid, Spain

For the purpose of material studies for future nuclear fusion reactors, the IFMIF deuteron beams present a simultaneous combination of unprecedentedly high intensity (2x125 mA CW), power (2x5 MW) and space charge. Special considerations and new concepts have been developed in order to overcome these challenges. The global strategy for beam dynamics design in the 40 MeV IFMIF accelerators is presented, stressing on the control of micro-losses, and the possibility of on-line fine tuning. The obtained results are then analysed in terms of beam halo and emittance growth.

Slides MOODB01 [3.807 MB]

MOODB02

RF Modeling Plans for the European Spallation Source

56

S. Molloy, M. Lindroos, S. Peggs
ESS, Lund, Sweden
R. Ainsworth
Royal Holloway, University of London, Surrey, United Kingdom
R.J.M.Y. Ruber
Uppsala University, Uppsala, Sweden

The European Spallation Source (ESS) will be the world's most powerful next generation neutron source. The ESS linac is designed to accelerate highly charged bunches of protons to a final energy of 2.5 GeV, with a design beam power of 5 MW, for collision with a target used to produce the high neutron flux. In order to achieve this several stages of RF acceleration are required, each using a different technology. The high beam current and power require a high degree of control of the accelerating RF, and the specification that no more than 1 W/m of losses will be experienced means that the excitation and decay of the HOMs must be very well understood. Experience at other high power machines also implies that an understanding of the generation and subsequent trajectories of any field-emitted electrons should be understood. Thermal detuning of the HOM couplers due to multipacting is a serious concern here. This paper will outline the RF modeling plans - including the construction of mathematical models, simulations of HOMs, and multipacting - during the current Accelerator Design Update phase, and will discuss several of the more important issues for ESS.

Slides MOODB02 [48.641 MB]

MOODB03

Capture and Transport of the Laser Accelerated Ion Beams for the LIGHT Project

59

S.G. Yaramyshev, W.A. Barth, I. Hofmann, A. Orzhekhovskaya
GSI, Darmstadt, Germany
B. Zielbauer
HIJ, Jena, Germany

Funding: Work supported by EURATOM (IFK KiT Program) and HIC for FAIR
An impressive advantage of Laser Ion Sources is an extremely high beam brilliance. The LIGHT project (Laser Ion Generation, Handling and Transport) is dedicated to the production of protons (ions), accelerated up to 10 MeV by using the GSI PHELIX laser at GSI, and injected into a conventional accelerator. A successful experimental campaign stimulated further investigation of the focusing, transport and collimation of the high energy and high brilliance proton beam. In addition to the advanced codes, describing the very early expansion phase of the proton-electron cloud, the versatile multiparticle code DYNAMION was implemented to perform beam dynamics simulations for different possible transport lines. Potentially transport lines compraises magnetic quadrupole lenses and/or solenoids for transverse beam focusing. A bunch rotation rf cavity decreasing the energy spread of the protons was included into the simulations. The results of the beam dynamics simulations are presented, as well as benchmarking activities with other codes. Further developments of the experimental test stand and the different possibilities of its integration to the GSI accelerators chain are discussed.

Slides MOODB03 [2.185 MB]

Paper	Title	Page
MOODB01	Dynamics of the IFMIF Very High-intensity Beam	53
	P.A.P. Nghiem, R.D. Duperrier, A. Mosnier, D. Uriot CEA/DSM/IRFU, France N. Chauvin, O. Delferrière, W. Simeoni CEA/IRFU, Gif-sur-Yvette, France M. Comunian INFN/LNL, Legnaro (PD), Italy C. Oliver CIEMAT, Madrid, Spain
	For the purpose of material studies for future nuclear fusion reactors, the IFMIF deuteron beams present a simultaneous combination of unprecedentedly high intensity (2x125 mA CW), power (2x5 MW) and space charge. Special considerations and new concepts have been developed in order to overcome these challenges. The global strategy for beam dynamics design in the 40 MeV IFMIF accelerators is presented, stressing on the control of micro-losses, and the possibility of on-line fine tuning. The obtained results are then analysed in terms of beam halo and emittance growth.
	Slides MOODB01 [3.807 MB]

MOODB02	RF Modeling Plans for the European Spallation Source	56
	S. Molloy, M. Lindroos, S. Peggs ESS, Lund, Sweden R. Ainsworth Royal Holloway, University of London, Surrey, United Kingdom R.J.M.Y. Ruber Uppsala University, Uppsala, Sweden
	The European Spallation Source (ESS) will be the world's most powerful next generation neutron source. The ESS linac is designed to accelerate highly charged bunches of protons to a final energy of 2.5 GeV, with a design beam power of 5 MW, for collision with a target used to produce the high neutron flux. In order to achieve this several stages of RF acceleration are required, each using a different technology. The high beam current and power require a high degree of control of the accelerating RF, and the specification that no more than 1 W/m of losses will be experienced means that the excitation and decay of the HOMs must be very well understood. Experience at other high power machines also implies that an understanding of the generation and subsequent trajectories of any field-emitted electrons should be understood. Thermal detuning of the HOM couplers due to multipacting is a serious concern here. This paper will outline the RF modeling plans - including the construction of mathematical models, simulations of HOMs, and multipacting - during the current Accelerator Design Update phase, and will discuss several of the more important issues for ESS.
	Slides MOODB02 [48.641 MB]

MOODB03	Capture and Transport of the Laser Accelerated Ion Beams for the LIGHT Project	59
	S.G. Yaramyshev, W.A. Barth, I. Hofmann, A. Orzhekhovskaya GSI, Darmstadt, Germany B. Zielbauer HIJ, Jena, Germany
	Funding: Work supported by EURATOM (IFK KiT Program) and HIC for FAIR An impressive advantage of Laser Ion Sources is an extremely high beam brilliance. The LIGHT project (Laser Ion Generation, Handling and Transport) is dedicated to the production of protons (ions), accelerated up to 10 MeV by using the GSI PHELIX laser at GSI, and injected into a conventional accelerator. A successful experimental campaign stimulated further investigation of the focusing, transport and collimation of the high energy and high brilliance proton beam. In addition to the advanced codes, describing the very early expansion phase of the proton-electron cloud, the versatile multiparticle code DYNAMION was implemented to perform beam dynamics simulations for different possible transport lines. Potentially transport lines compraises magnetic quadrupole lenses and/or solenoids for transverse beam focusing. A bunch rotation rf cavity decreasing the energy spread of the protons was included into the simulations. The results of the beam dynamics simulations are presented, as well as benchmarking activities with other codes. Further developments of the experimental test stand and the different possibilities of its integration to the GSI accelerators chain are discussed.
	Slides MOODB03 [2.185 MB]