RUPAC2012 - List of Authors (Chernov, A.N.)

Paper

Title

Page

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

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.

WEPPD051

Stripper Extraction from the H-minus Ions Cyclotron C-80

A.N. Chernov, S.A. Artamonov, E.M. Ivanov, G.A. Riabov
PNPI, Gatchina, Leningrad District, Russia
A.V. Galchuck
NIIEFA, St. Petersburg, Russia

The design and beam optics calculation of the extraction system for H-minus ions cyclotron in Gatchina are presented. The foil positions which provide extraction of beams in the energy range 40-75 MeV into existing extraction window are determined. The optics parameters of the corrector-magnet to match extracted beams to the existing beam transport line are examined.

Paper	Title	Page
WEPPC015	Highly Accurate 3D Modeling of the C-80 Isochronous Cyclotron Magnetic Structure	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.

WEPPD051	Stripper Extraction from the H-minus Ions Cyclotron C-80
	A.N. Chernov, S.A. Artamonov, E.M. Ivanov, G.A. Riabov PNPI, Gatchina, Leningrad District, Russia A.V. Galchuck NIIEFA, St. Petersburg, Russia
	The design and beam optics calculation of the extraction system for H-minus ions cyclotron in Gatchina are presented. The foil positions which provide extraction of beams in the energy range 40-75 MeV into existing extraction window are determined. The optics parameters of the corrector-magnet to match extracted beams to the existing beam transport line are examined.