An adjustable focusing system for a 2 MeV H- ion beam line based on permanent magnet quadrupoles

Martti, Nirkko; Braccini, Saverio; Ereditato, Antonio; Kreslo, Igor; Scampoli, Paola; Weber, Michael (2013). An adjustable focusing system for a 2 MeV H- ion beam line based on permanent magnet quadrupoles. Journal of instrumentation, 8(02), P02001-P02001. Institute of Physics Publishing IOP 10.1088/1748-0221/8/02/P02001

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A compact adjustable focusing system for a 2 MeV H- RFQ Linac is designed, constructed and tested based on four permanent magnet quadrupoles (PMQ). A PMQ model is realised using finite element simulations, providing an integrated field gradient of 2.35 T with a maximal field gradient of 57 T/m. A prototype is constructed and the magnetic field is measured, demonstrating good agreement with the simulation. Particle track simulations provide initial values for the quadrupole positions. Accordingly, four PMQs are constructed and assembled on the beam line, their positions are then tuned to obtain a minimal beam spot size of (1.2 x 2.2) mm^2 on target. This paper describes an adjustable PMQ beam line for an external ion beam. The novel compact design based on commercially available NdFeB magnets allows high flexibility for ion beam applications.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)
10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)

UniBE Contributor:

Martti, Nirkko; Braccini, Saverio; Ereditato, Antonio; Kreslo, Igor; Scampoli, Paola and Weber, Michael

Subjects:

500 Science > 530 Physics

ISSN:

1748-0221

Publisher:

Institute of Physics Publishing IOP

Language:

English

Submitter:

Elena Kirillova

Date Deposited:

23 Sep 2014 15:31

Last Modified:

19 Dec 2014 22:09

Publisher DOI:

10.1088/1748-0221/8/02/P02001

Web of Science ID:

000315672700057

ArXiv ID:

1211.2992v3

BORIS DOI:

10.7892/boris.49268

URI:

https://boris.unibe.ch/id/eprint/49268

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