INVESTIGATION OF THE MAGNETIC FIELD OF AN ISOCHRONOUS CYCLOTRON

Journal Article · Mon Jan 01 04:00:00 EST 1962 · Philips Technical Review (Netherlands)

OSTI ID:4702109

Verster, N F; Hagedoorn, H L

An isochronous cyclotron under construction enables different kinds of ions to be accelerated to a variable final energy (protons up to a maximum of 25 Mev). In an isochronous cyclotron the influence of the relativistic increase of mass on the revolution frequency is compensated by making the induction B(r) of the magnetic field increase with the radius r. The verticai stability of the orbits is ensured by making B vary periodically in the azimuthal direction by means of sector-shaped hills and valleys on the pole pieces. The cyclotron is also fitted with ten pairs of trimming coils, that allow the form of B(r) to be varied to meet the demands imposed by the different ionic species and the different final energies. The description of how this complicated field is measured---for ten different excitations of the main coil, in connection with the desired variation of the final energy---and how the more than 10/sup 5/ measured values are processed with a computer is given. The final result of the calculations is the value of the currents through the trimming coils needed to give the best approximation to the desired isochronous field. In the course of these calculations, improbable measured values are indicated and replaced. (auth)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-17-026657
• OSTI ID: 4702109
• Journal Information: Philips Technical Review (Netherlands), Journal Name: Philips Technical Review (Netherlands) Vol. Vol: 24; ISSN PTREA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

COILS
COMPUTERS
CONFIGURATION
CURRENTS
CYCLOTRONS
ENERGY
ENERGY RANGE
ERRORS
INDUCTION
ION BEAMS
MAGNETIC FIELDS
MAGNETS
MASS
MEASURED VALUES
NUMERICALS
PHYSICS
PLANNING
PROTON BEAMS
RELATIVITY THEORY
STABILITY
SURFACES
VARIATIONS