GENERATION OF INTENSE MAGNETIC FIELDS WITH HIGH HOMOGENEITY
Date
1969-09
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ORCID
Type
Degree Level
Masters
Abstract
The intense magnetic fields with a high degree of field homogeneity have applications in particle accelerators, plasma containers, cyclotrons and other nuclear physics experiments. The
problem of satisfying the high homogeneity requirements becomes more severe with an increase in field intensity. Air-core solenoids and iron-core electromagnets are considered as the two basic designs for producing the desired field. In the case of air-core solenoids various coil arrangements are examined. The suitability of a two coil system and a split-coil design for improving the field homogeneity is illustrated. An analysis based on the method of zonal harmonics is developed. The effect of different coil geometries on field intensity and homogeneity is studied. In the case of the two-coil system, the effect of coil separation on field homogeneity, for various coil geometries, is examined. The method of adding compensating windings to the cylindrical solenoid for improving field homogeneity is investigated in detail. The field homogeneity figures are computed for certain coil arrangements.
The severe, problem of cooling high powered air-core solenoids is discussed and the design calculations for the cooling system are presented.
In the iron-core electromagnet design, the effect of pole piece and pole core shape on saturation and gap field homogeneity is discussed. The importance of proper dimensioning of various parts of the magnetic circuit is stressed. A practical design procedure for an iron-core magnet is outlined. Central gap field homogeneity figures are computed for specific pole geometries.
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Degree
Master of Science (M.Sc.)
Department
Electrical Engineering