RUPAC2012 - List of Keywords (H-minus)

Paper	Title	Other Keywords	Page
WEPPC015	Highly Accurate 3D Modeling of the C-80 Isochronous Cyclotron Magnetic Structure	cyclotron, ion, extraction, simulation	475
	S.A. Artamonov, A.N. Chernov, E.M. Ivanov, G.A. Riabov PNPI, Gatchina, Leningrad District, Russia
	The very complicated magnetic structure with extremely high spiral angle and set of 17 correction shim types in each of 8 sectors is used in the H-minus ion isochronous cyclotron C-80. The 3D code MERMAID was applied to optimize geometry of the sectors and shims in the hill and value region. A precision finite-element model allows take into account the iron non-linear effects and the detailed magnet geometry. MERMAID makes use about 20.5 millions nodes and provides magnetic field calculation accuracy in 10^-20 Gs. The integral magnetic field parameters (isochronism, transversal motion frequency, H-minus ion electromagnetic dissociation) have been optimized by using the trajectory analyses. Program provides the significant reduction the time and efforts for the determination the necessary shims set in comparison with trial-and-error method.

Paper

Title

Other Keywords

Page

WEPPC015

Highly Accurate 3D Modeling of the C-80 Isochronous Cyclotron Magnetic Structure

cyclotron, ion, extraction, simulation

475

S.A. Artamonov, A.N. Chernov, E.M. Ivanov, G.A. Riabov
PNPI, Gatchina, Leningrad District, Russia

The very complicated magnetic structure with extremely high spiral angle and set of 17 correction shim types in each of 8 sectors is used in the H-minus ion isochronous cyclotron C-80. The 3D code MERMAID was applied to optimize geometry of the sectors and shims in the hill and value region. A precision finite-element model allows take into account the iron non-linear effects and the detailed magnet geometry. MERMAID makes use about 20.5 millions nodes and provides magnetic field calculation accuracy in 10^-20 Gs. The integral magnetic field parameters (isochronism, transversal motion frequency, H-minus ion electromagnetic dissociation) have been optimized by using the trajectory analyses. Program provides the significant reduction the time and efforts for the determination the necessary shims set in comparison with trial-and-error method.