The IFMIF-EVEDA challenges in beam dynamics and their treatment

Nghiem, P.; Chauvin, Nicolas; Comunian, M.; Delferrière, O.; Duperrier, R.; Mosnier, A.; Oliver, C.; Uriot, D.

doi:10.1016/j.nima.2011.06.102

Cited by 25 publications

(15 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This corresponds, respectively, to the energies of 100 keV, 5, 9, and 40 MeV, where energy of space-charge forces is still dominant or at least noticeable. This situation is unique when compared to worldwide linear accelerators in operation or planned (Nghiem et al, 2011b). For a given energy, IFMIF has the highest beam power and the highest spacecharge regime.…”

Section: Issuesmentioning

confidence: 99%

“…That is why dynamic tolerances should be much severe than static ones. In our case, static tolerances have been defined according to the strategy defined in (Nghiem et al, 2011b), while dynamic tolerances are set to 1/10 of the static ones, unless important problems are detected. It can be foreseen that: (1) As static tolerances are corrected locally as to they appear, their effects should not be very different between local and start-to-end simulations.…”

Section: Start-to-end Studies For Lipacmentioning

confidence: 99%

“…Let us focus on the sections just at the RFQ exit, namely the MEBT and the four cryomodules of the SRF-Linac, where most emittance growths occur, and where various tuning possibilities exist. It has been demonstrated in Nghiem et al (2010) that successive horizontal and vertical emittance increases in the MEBT are clearly due to the classical charge redistribution mechanism (Wangler, 2008). Whenever the space charge term is larger than the emittance term in a given plane, the emittance growths in this plane, due to the space charge dominated behavior.…”

Section: Emittance Vs Halomentioning

confidence: 99%

See 2 more Smart Citations

Dynamics of the IFMIF very high-intensity beam

et al. 2014

Self Cite

View full text Add to dashboard Cite

For the purpose of material studies for future nuclear fusion reactors, the IFMIF deuteron beams present a simultaneous combination of unprecedentedly high intensity (2 × 125 mA CW), power (2 × 5 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 of the 40 MeV IFMIF accelerators is presented, stressing on the control of micro-losses, and the possibility of online fine tuning. Start-to-end simulations without and with errors are presented for the prototype accelerator. Considerations about conflicts between halo and emittance minimization are then discussed in this very high space charge context.

show abstract

Section: Issuesmentioning

confidence: 99%

Section: Start-to-end Studies For Lipacmentioning

confidence: 99%

Section: Emittance Vs Halomentioning

confidence: 99%

See 1 more Smart Citation

Dynamics of the IFMIF very high-intensity beam

et al. 2014

Self Cite

View full text Add to dashboard Cite

show abstract

“…Actually, the uniform beam formation has been realized in several facilities using octupole [3][4][5] and sextupole magnets [6]. The nonlinear focusing method is attracting attention as a new technique for uniform irradiation with high-intensity beams in accelerator-driven neutron facilities: The use of multipole magnets is developed or planned in many high- power neutron facilities now in operation or under construction [7][8][9][10][11]. The requirement of the nonlinear force for the uniformization and the width of the resultant uniform distribution were already studied theoretically [2].…”

Section: Introductionmentioning

confidence: 99%

Transformation of the Beam Intensity Distribution and Formation of a Uniform Ion Beam by Means of Nonlinear Focusing

Yuri

Yuyama

Ishizaka

et al. 2014

Plasma and Fusion Research

View full text Add to dashboard Cite

Avoiding undesirable thermal stress or damage of a target vessel is an essential subject in high-intensity beam irradiation for accelerator-driven neutron production. A promising method to tailor the transverse beam intensity distribution for uniform beam irradiation on the target is the use of multipole magnets. We, therefore, study the transformation and uniformization of the transverse intensity distribution by means of nonlinear focusing induced from multipole magnets. It is theoretically described how the intensity distribution is transformed and made uniform by the nonlinear focusing force. Large-area uniform proton and heavy-ion beams are experimentally formed using octupole magnets at the azimuthally-varying-field cyclotron in Japan Atomic Energy Agency.

show abstract

“…Examples of beam behavior are given for the IFMIF accelerators described in Ref. 2, simulated with the TraceWin code. 3 Until now, even for high-intensity beams, the core is commonly described by the classical e, a, b parameters.…”

mentioning

confidence: 99%