Developments in the ray-tracing code Zgoubi for 6-D multiturn tracking in FFAG rings

Lemuet, F.; Méot, F.

doi:10.1016/j.nima.2005.03.156

Cited by 18 publications

(13 citation statements)

References 4 publications

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“…Note that the "CYCLOTRON" element allows the overlapping of 5 such dipole fields. This follows the method described in [71].…”

Section: Resultsmentioning

confidence: 99%

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High power ring methods and accelerator driven subcritical reactor application

Tahar

2016

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High power proton accelerators allow providing, by spallation reaction, the neutron fluxes necessary in the synthesis of fissile material, starting from Uranium 238 or Thorium 232. This is the basis of the concept of sub-critical operation of a reactor, for energy production or nuclear waste transmutation, with the objective of achieving cleaner, safer and more efficient process than today's technologies allow.Designing, building and operating a proton accelerator in the 500-1000 MeV energy range, CW regime, MW power class still remains a challenge nowadays. There is a limited number of installations at present achieving beam characteristics in that class, e.g., PSI in Villigen, 590 MeV CW beam from a cyclotron, SNS in Oakland, 1 GeV pulsed beam from a linear accelerator, in addition to projects as the ESS in Europe, a 5 MW beam from a linear accelerator.Furthermore, coupling an accelerator to a sub-critical nuclear reactor is a challenging proposition: some of the key issues/requirements are the design of a spallation target to withstand high power densities as well as ensure the safety of the installation.These two domains are the grounds of the PhD work: the focus is on the high power ring methods in the frame of the KURRI FFAG collaboration in Japan: upgrade of the installation towards high intensity is crucial to demonstrate the high beam power capability of FFAG. Thus, modeling of the beam dynamics and benchmarking of different codes was undertaken to validate the simulation results. Experimental results revealed some major losses that need to be understood and eventually overcome. By developing analytical models that account for the field defects, one identified major sources of imperfection in the design of scaling FFAG that explain the important tune variations resulting in the crossing of several betatron resonances. A new formula is derived to compute the tunes and properties established that characterize the effect of the field imperfections on the transverse beam dynamics. The results obtained allow to develop a correction scheme to minimize the tune variations of the FFAG. This is the cornerstone of a new fixed tune non-scaling FFAG that represents a potential candidate for high power applications.As part of the developments towards high power at the KURRI FFAG, beam dynamics studies have to account for space charge effects. In that framework, models have been installed in the tracking code ZGOUBI to account for the self-interaction of the particles in the accelerator. Application to the FFAG studies is shown.Finally, one focused on the ADSR concept as a candidate to solve the problem of nuclear waste. In order to establish the accelerator requirements, one compared the performance of ADSR with other conventional critical reactors by means of the levelized cost of energy. A general comparison between the different accelerator technologies that can satisfy these requirements is finally presented.In summary, the main drawback of the ADSR technology is the high Levelized Cost Of Energy compared to othe...

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“…Note that the "CYCLOTRON" element allows the overlapping of 5 such dipole fields. This follows the method described in [71].…”

Section: Resultsmentioning

confidence: 99%

“…4.7. There- (k F ,k D )=(7.6,7.4),(7.6,7.8) (k F ,k D )=(7.6,7.8),(7.6,7.8) (k F ,k D )=(7.6,7.4),(7.6,7.4) (k F ,k D )=(7.6,7.5),(7.6,7.8) fore, in order to verify the previous results for a variety of cases, one choose to vary the fringe field by using the analytical model "FFAG" in ZGOUBI [81]. As shown in Fig.…”

Section: Novel Ffag Conceptmentioning

confidence: 97%

High power ring methods and accelerator driven subcritical reactor application

Tahar

2016

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“…Zgoubi is the most widely used code for simulating FFAGs [25,26] and has been used for several designs, such as EMMA [19,27], PAMELA [16] and RACCAM [28]. It also has applications outside FFAGs: for example it has been used for spin tracking in the AGS Synchrotron [29].…”

Section: Structure Of Pyzgoubimentioning

confidence: 99%

The PyZgoubi framework and the simulation of dynamic aperture in fixed-field alternating-gradient accelerators

Tygier¹,

Appleby²,

Garland³

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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a b s t r a c tWe present PyZgoubi, a framework that has been developed based on the tracking engine Zgoubi to model, optimise and visualise the dynamics in particle accelerators, especially fixed-field alternatinggradient (FFAG) accelerators. We show that PyZgoubi abstracts Zgoubi by wrapping it in an easy-to-use Python framework in order to allow simple construction, parameterisation, visualisation and optimisation of FFAG accelerator lattices. Its object oriented design gives it the flexibility and extensibility required for current novel FFAG design. We apply PyZgoubi to two example FFAGs; this includes determining the dynamic aperture of the PAMELA medical FFAG in the presence of magnet misalignments, and illustrating how PyZgoubi may be used to optimise FFAGs. We also discuss a robust definition of dynamic aperture in an FFAG and show its implementation in PyZgoubi.

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“…DIPOLES : Dipole magnet N -tuple, polar frame [38,39] DIPOLES works much like DIPOLE as to the field modelling, yet with the particularity that it allows positioning up to 5 such dipoles within the angular sector with full aperture AT thus allowing accounting for overlapping fringe fields. This is done in the following way 5 .…”

Section: Extrapolation Off Median Planementioning

confidence: 99%

“…A detailed application, with five dipoles, can be found in Ref. [38]. This is done in the way described below.…”

Section: Elmult : Electric Multipolementioning

confidence: 99%

Zgoubi users guide

Méot¹

2012

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Developments in the ray-tracing code Zgoubi for 6-D multiturn tracking in FFAG rings

Cited by 18 publications

References 4 publications

High power ring methods and accelerator driven subcritical reactor application

High power ring methods and accelerator driven subcritical reactor application

The PyZgoubi framework and the simulation of dynamic aperture in fixed-field alternating-gradient accelerators

Zgoubi users guide

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