NDLI: Some basic considerations of sector magnets

Content Provider	IEEE Xplore Digital Library
Author	Nobes, M.J. McLaren, M.G.
Copyright Year	1996
Description	Author affiliation: Inst. of Sci. Res., Salford Univ., UK (Nobes, M.J.)
Abstract	Since sector field magnets are widely used in ion implanters and isotope separators, it is appropriate that designers and operators appreciate their limitations through an ability to trace the path of charged particles in magnetic fields. This paper considers a sector magnet with variable angle pole tips. Initially, the direction and displacement of output rays, relative to magnet reference points, are deduced. This leads to an expression for the image distance in terms of the source distance, the sector included angle, and the angles of incidence and exit of input and output beams. The magnetic field of sector magnets extends beyond the physical boundary of the magnet itself and this fringe field can influence the path of incident particles before they enter the hard field boundary. Assuming an analytical expression for the fringe field variation, its influence on particle path radius and effective increase in magnetic volume can be estimated. Finally, the isotopic resolving power of a given sector field magnet may be calculated.
Starting Page	379
Ending Page	382
File Size	327058
Page Count	4
File Format	PDF
ISBN	078033289X
DOI	10.1109/IIT.1996.586353
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-06-16
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnets Magnetic fields Magnetic analysis Ion beams Magnetic materials Implants Isotopes Particle separators Foundries Magnetic separation
Content Type	Text
Resource Type	Article

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