PARTICLE FOCUSING PROPERTIES OF THE PROLATE SPHEROIDAL MAGNETIC FIELD AND OF THE SUPERPOSED SPHEROIDAL AND UNIFORM FIELDS

Journal Article · Fri Mar 01 04:00:00 EST 1963 · Proc. Phys. Soc. (London)

DOI:https://doi.org/10.1088/0370-1328/81/3/324· OSTI ID:4719928

Michelson, D; Richardson, H O.W.

Values of transmission T and resolution W are computed for prolate spheroidal field magnetic spectrometers with various positions of the source. A value of 15% of 4 e (as Fe/sup 59 was found for T with W = 1%. The aberration due to size of source was estimated by computing trajectories from non-axial points. Envelopes and caustics formed by monoenergetic families of rays are mapped for several magnetic rigidities. The focusing of particles in superpositions in various ratios of a prolate spheroidal and uniform field with a common axis is considered. It appears that the position of a point image I of an axial point object O is unrestricted except to the extent that O and I must lie between the foci of the spheroids on the axis and that a narrow zone of angles of emission is used. A BETA spectrometer using one such ratio is found to give a poorer aperture aberration but an improved source size aberration when compared with the pure spheroidal field instrument. In each case the luminosity is similar to that of the uniform field lens spectrometer. (auth)

• Research Organization: London Univ.
• NSA Number: NSA-17-020754
• OSTI ID: 4719928
• Journal Information: Proc. Phys. Soc. (London), Journal Name: Proc. Phys. Soc. (London) Vol. Vol: 81
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ABSORPTION
ANGULAR DISTRIBUTION
BETA SPECTROMETERS
CHARGED PARTICLES
EMISSION
INSTRUMENTS
LENSES
LIGHT
MAGNETIC FIELDS
PHYSICS
RESOLUTION
SPECTROMETERS
SPHERES
ZONES