Production of Simultaneous, Variable Energy Beams from the Triumf Cyclotron

Richardson, J. Reginald; Blackmore, E. W.; Dutto, G.; Kost, C. J.; Mackenzie, G. H.; Craddock, M. K.

doi:10.1109/tns.1975.4327895

Cited by 16 publications

(7 citation statements)

References 1 publication

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“…(The steel was sourced from the Davie ship-building company of Quebec.) The tolerance of the error field was carefully studied in 1972 [15], and the cyclotron was commissioned in 1974-1975 [16,17], though the passage through coupling resonances has not been studied until recently. After correcting the errors in the measurement data, we have recalculated the properties of static equilibrium orbits.…”

Section: Jinst 18 P03021mentioning

confidence: 99%

Redundant field survey data of cyclotron with imperfect median plane

Zhang

Rao

2023

J. Inst.

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An accurate and detailed field map is important for cyclotron beam dynamics studies. During the long history of cyclotron studies, many techniques have been developed by cyclotron pioneers for the treatment of median plane field map. In this paper, we take the TRIUMF 500 MeV cyclotron as an example to study the asymmetric field resulting from imperfect median plane symmetry. The “Gordon approach” and a highly accurate compact finite differentiation method are used to investigate the historical field survey data. The redundancy in the survey data is revealed by the expansion method, which also makes it possible to correct the error in the measurement. Finally, both the azimuthal field Bθ and the axial gradient of the axial field dBz /dz in the median plane are corrected using the radial field map Br . The influence of the correction is examined by recalculating the equilibrium orbit properties of the TRIUMF cyclotron. The result shows significantly increased vertical centering errors of the closed orbits. A further simulation study suggests that these centering errors can be reduced to below 1.5 cm by adjusting the trim coils' Br field within the output limits of our trim coils' power supplies. The error in the measurement field data may explain why the calculated trim coils' settings during the cyclotron commissioning in 1974 encountered difficulty.

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Section: Jinst 18 P03021mentioning

confidence: 99%

Redundant field survey data of cyclotron with imperfect median plane

Zhang

Rao

2023

J. Inst.

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“…the TRIUMF cyclotron. As an illustration, the tune diagram of the TRIUMF [7] cyclotron shown in Fig. 1 was published in 1975, but CYCLOPS remains a useful and fast code.…”

Section: Cyclopsmentioning

confidence: 99%

“…1. Square of an axial frequency as a function of radius at TRIUMF cyclotron: 1-calculation with CYCLOPS (solid line), 2-measurements (data points) [7]. betatron frequencies of a 250 MeV superconducting proton cyclotron [18].…”

Section: Cosy Infinitymentioning

confidence: 99%

Computer codes for beam dynamics analysis of cyclotronlike accelerators

Smirnov

2017

Phys. Rev. Accel. Beams

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Computer codes suitable for the study of beam dynamics in cyclotronlike (classical and isochronous cyclotrons, synchrocyclotrons, and fixed field alternating gradient) accelerators are reviewed. Computer modeling of cyclotron segments, such as the central zone, acceleration region, and extraction system is considered. The author does not claim to give a full and detailed description of the methods and algorithms used in the codes. Special attention is paid to the codes already proven and confirmed at the existing accelerating facilities. The description of the programs prepared in the worldwide known accelerator centers is provided. The basic features of the programs available to users and limitations of their applicability are described.

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“…[28][29][30] A large isochronous cyclotron ͑Meson factory͒, TRIUMF, was started up in 1974 in Canada with the purpose of obtaining protons accelerated to 520 MeV. 31 H Ϫ ions are first accelerated to 300 keV and then introduced into the cyclotron along its axis with further turning into the acceleration plane by an electrostatic inflector. Extraction of three proton beams of various energies by stripping with aluminum foils was realized by 1977.…”

Section: Accelerators Of Hydrogen Negative Ionsmentioning

confidence: 99%

Use of hydrogen negative ions in particle accelerators

Dimov

1996

Review of Scientific Instruments

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A ring magnetron ionizer for polarized negative ion sources AIP Conf.The use of negative hydrogen ions in different accelerators, especially in charge-exchange injection of protons into orbits of high energy accelerators, is reviewed. The principles of charge exchange for particle acceleration and control and the benefits are discussed after which the performance and characteristics of selected accelerators are summarized. Recent trends in negative ion sources for charge-exchange accelerators also are reviewed.

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Production of Simultaneous, Variable Energy Beams from the Triumf Cyclotron

Cited by 16 publications

References 1 publication

Redundant field survey data of cyclotron with imperfect median plane

Redundant field survey data of cyclotron with imperfect median plane

Computer codes for beam dynamics analysis of cyclotronlike accelerators

Use of hydrogen negative ions in particle accelerators

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