Precise centering and field characterization of magnetic quadrupole lenses

A setup to investigate fields of magnetic quadrupole lenses was designed and constructed. It allows the spatial position of the axis and the multipole structure of the field of a lens (or lenses) with aperture sizes from 11mm to be determined. The technique employed is based on the measurements of t...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2013-02, Vol.700, p.70-74
Main Authors: Kolinko, S.V., Ponomarev, A.G., Rebrov, V.A.
Format: Article
Language:English
Subjects:
Accelerators
Data processing
Magnetic field structure
Magnetic lenses
Mathematical analysis
Multipoles
Parasitic multipole components
Quadrupole lens
Quadrupoles
Three dimensional
Vectors (mathematics)
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Description
Summary:A setup to investigate fields of magnetic quadrupole lenses was designed and constructed. It allows the spatial position of the axis and the multipole structure of the field of a lens (or lenses) with aperture sizes from 11mm to be determined. The technique employed is based on the measurements of the radial component of the magnetic induction vector using a Hall probe at the points located on the three dimensional surface with subsequent data processing using the Laplace equation. The article presents design and performance characteristics of the setup as well as results from the accuracy evaluations in the measurements of the centers and parasitic multipole field components of the magnetic quadrupole lenses in the integrated doublet.
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2012.10.072