Modelling and design of permanent magnet multipoles for beam transport and focusing. II. Configuring the quad

V. M. Amoskov; V. N. Vasiliev; E. I. Gapionok; G. G. Gulbekyan; N. S. Edamenko; I. A. Ivanenko; N. Yu. Kazarinov; I. V. Kalagin; M. V. Kaparkova; V. P. Kukhtin; E. A. Lamzin; A. A. Makarov; A. N. Nezhentzev; D. A. Ovsyannikov; D. A. Ovsyannikov (Jr.); N. F. Osipov; I. Yu. Rodin; S. E. Sychevsky; A. A. Firsov; N. A. Shatil

V. M. Amoskov ; V. N. Vasiliev ; E. I. Gapionok ; G. G. Gulbekyan ; N. S. Edamenko ; I. A. Ivanenko ; N. Yu. Kazarinov ; I. V. Kalagin ; M. V. Kaparkova ; V. P. Kukhtin ; E. A. Lamzin ; A. A. Makarov ; A. N. Nezhentzev ; D. A. Ovsyannikov ; D. A. Ovsyannikov (Jr.) ; N. F. Osipov ; I. Yu. Rodin ; S. E. Sychevsky ; A. A. Firsov ; N. A. Shatil

Vestnik Sankt-Peterburgskogo universiteta. Prikladnaâ matematika, informatika, processy upravleniâ, Tome 18 (2022) no. 4, pp. 454-472

Voir la notice de l'article provenant de la source Math-Net.Ru

Résumé

An optimized magnetic specification has been searched for a PM quadrupole constructed for the DC-140 cyclotron in JINR, Dubna. The field inhomogeneity should be reduced to come closer to an ideal distribution. The quad parameters should be determined with very high mechanical and magnetic precision in order to reach the specified gradient. Results of the analytic study based on a 2D model gave initial values for the PM blocks dimensions and orientations. To ensure stringent performance criteria, parametrized 2D and 3D models of the quad were built. These models were used to optimize the magnet configuration, analyze its sensitivity to various errors and derive parameter tolerances. Additional adjustment to suitable field quality is foreseen using results of a trajectory analysis and acceptance inspection. The design parameters for the best suited magnet configuration are presented and the performance criteria are defined. However, an electromagnetic analysis of the selected configuration has revealed that the relative field error adopted previously as the optimization criterion gives low accuracy estimate. Alternative estimations are proposed utilizing the field gradient error as the basic criterion to satisfy the constraint on the field inhomogeneity.

Mots-clés : permanent magnet, quadrupole, simulation.
Keywords: beam transport, direct and inverse problems

@article{VSPUI_2022_18_4_a1,
     author = {V. M. Amoskov and V. N. Vasiliev and E. I. Gapionok and G. G. Gulbekyan and N. S. Edamenko and I. A. Ivanenko and N. Yu. Kazarinov and I. V. Kalagin and M. V. Kaparkova and V. P. Kukhtin and E. A. Lamzin and A. A. Makarov and A. N. Nezhentzev and D. A. Ovsyannikov and D. A. Ovsyannikov (Jr.) and N. F. Osipov and I. Yu. Rodin and S. E. Sychevsky and A. A. Firsov and N. A. Shatil},
     title = {Modelling and design of permanent magnet multipoles for beam transport and focusing. {II.} {Configuring} the quad},
     journal = {Vestnik Sankt-Peterburgskogo universiteta. Prikladna\^a matematika, informatika, processy upravleni\^a},
     pages = {454--472},
     publisher = {mathdoc},
     volume = {18},
     number = {4},
     year = {2022},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSPUI_2022_18_4_a1/}
}

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AU  - N. S. Edamenko
AU  - I. A. Ivanenko
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%A A. A. Makarov
%A A. N. Nezhentzev
%A D. A. Ovsyannikov
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%A N. F. Osipov
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%A A. A. Firsov
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%T Modelling and design of permanent magnet multipoles for beam transport and focusing. II. Configuring the quad
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V. M. Amoskov; V. N. Vasiliev; E. I. Gapionok; G. G. Gulbekyan; N. S. Edamenko; I. A. Ivanenko; N. Yu. Kazarinov; I. V. Kalagin; M. V. Kaparkova; V. P. Kukhtin; E. A. Lamzin; A. A. Makarov; A. N. Nezhentzev; D. A. Ovsyannikov; D. A. Ovsyannikov (Jr.); N. F. Osipov; I. Yu. Rodin; S. E. Sychevsky; A. A. Firsov; N. A. Shatil. Modelling and design of permanent magnet multipoles for beam transport and focusing. II. Configuring the quad. Vestnik Sankt-Peterburgskogo universiteta. Prikladnaâ matematika, informatika, processy upravleniâ, Tome 18 (2022) no. 4, pp. 454-472. http://geodesic.mathdoc.fr/item/VSPUI_2022_18_4_a1/

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