The feasibility of high power cyclotrons

Stammbach, T.; Adam, Stefan; Fitze, H.; Joho, W.; Märki, M.; Olivo, M.; Rezzonico, L.; Sigg, P.; Schryber, U.

doi:10.1016/0168-583x(95)01377-6

Cited by 24 publications

(21 citation statements)

References 4 publications

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“…The area is of special relevance for the conceptual designs of cyclotrons as energy-efficient drivers for accelerator driven systems (ADS) [10,11]. Nevertheless, there is no selfconsistent first order theory of matched bunched beams with space charge in cyclotrons to date known to the author.…”

Section: Introductionmentioning

confidence: 99%

Transverse-longitudinal coupling by space charge in cyclotrons

Baumgarten

2011

Phys. Rev. ST Accel. Beams

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A method is presented that enables one to compute the parameters of matched beams with space charge in cyclotrons with emphasis on the effect of the transverse-longitudinal coupling. Equations describing the transverse-longitudinal coupling and corresponding tune shifts in first order are derived for the model of an azimuthally symmetric cyclotron. The eigenellipsoid of the beam is calculated and the transfer matrix is transformed into block-diagonal form. The influence of the slope of the phase curve on the transverselongitudinal coupling is accounted for. The results are generalized and numerical procedures for the case of an azimuthally varying field cyclotron are presented. The algorithm is applied to the PSI injector II and ring cyclotron and the results are compared to TRANSPORT.

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Section: Introductionmentioning

confidence: 99%

Transverse-longitudinal coupling by space charge in cyclotrons

Baumgarten

2011

Phys. Rev. ST Accel. Beams

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“…First, we have identified a new, potentially closer targeting site [18], at 12.5 m, increasing rates by ×1. 6. Should this new location be employed, the additional statistics can allow us to either reach our physics goals more quickly or to run the cyclotron at 6 mA of protons (3 mA H + 2 ) rather than 10 mA of protons (5 mA H + 2 ) for the original time period.…”

Section: An Example: the Isodar Experimentsmentioning

confidence: 99%

“…Currently, PSI holds the record of highest power continuous wave (cw) proton beam from a cyclotron with 2.2 mA at 590 MeV energy, which amounts to ≈ 1.3 MW of beam power [5]. In this coupled cyclotron system, so-called vortex motion has been observed experimentally and been reproduced in Particle-In-Cell (PIC) simulations [6,7]. Here, the external focusing forces of the isochronous cyclotron combined with space-charge cause a spiraling of the bunch that can lead to longitudinal focusing.…”

Section: Introductionmentioning

confidence: 99%

High intensity cyclotrons for neutrino physics

Winklehner

Bahng

Calabretta

et al. 2018

Nuclear Instruments and Methods in Physics Research Section A:

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In recent years, the interest in high intensity proton beams in excess of several milli-amperes has risen. Potential applications are in neutrino physics, materials and energy research, and isotope production. Continuous wave proton beams of five to ten milli-amperes are now in reach due to advances in accelerator technology and through improved understanding of the beam dynamics. As an example application, we present the proposed IsoDAR experiment, a search for so-called sterile neutrinos and non-standard interaction using the KamLAND detector located in Japan. We present updated sensitivities for this experiment and describe in detail the design of the high intensity proton driver that uses several novel ideas. These are: accelerating H + 2 instead of protons, directly injecting beam into the cyclotron via a radio frequency quadrupole, and carefully matching the beam to achieve so-called vortex motion. The preliminary design holds up well in PIC simulation studies and the injector system is now being constructed, to be commissioned with a 1 MeV/amu test cyclotron.

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“…These conditions physically cannot be created in classical ring Isochronous Cyclotrons (IC) [1] or conventional Separate Orbit Cyclotrons (SOC) [2,3,4]. This is because in such cyclotrons, common sector cavities span the radial extent of turns, with multi-turn channel gaps, in which ϕ e , U n and S n must be kept fixed to satisfy the isochronism condition.…”

Section: Introductionmentioning

confidence: 99%

Variable-phase asynchronous cyclotron

Tumanyan

Sargsyan

Guiragossián

2002

Nuclear Instruments and Methods in Physics Research Section A:

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The conceptual design of a Variable-Phase Asynchronous Cyclotron (VPAC) is describe, which provides longitudinal bunch compression of accelerated proton or ion beams, and thus, permits high current acceleration at higher accelerator efficiency, where the possible beam losses are minimized and the accelerator's mechanical tolerances are relaxed. Beam control is assured by the ability to independently set and vary the acceleration phase and rf voltage amplitude, the inter-cavity harmonic number and the transverse focusing strength, which considerably overcome the space charge effects in each sector and turn of the proposed cyclotron. The new accelerator concept is especially suitable to accelerate intense proton beams up to 800 MeV in energy and average beam current in the 100-mA class. All accelerator elements are based on currently available and feasible technologies. To demonstrate feasibility of design, the detailed calculations and modeling of a 10-turn VPAC prototype for the production of 25.6 MeV, 100 mA proton beam are presented and the key features of the new accelerator concept are discussed.

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The feasibility of high power cyclotrons

Cited by 24 publications

References 4 publications

Transverse-longitudinal coupling by space charge in cyclotrons

Transverse-longitudinal coupling by space charge in cyclotrons

High intensity cyclotrons for neutrino physics

Variable-phase asynchronous cyclotron

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