A. V. Gavrilin | Searcharxiv

arXiv2016

Energy and material efficient non-circular bore Bitter magnets

There exist a number of experiments/applications where the second dimension of the bore of Bitter magnets is not fully utilized. Using an analytical solution for elliptical bore coils, we show that reducing one of the dimensions of the bore can lead to considerable decrease in consumed power and/or coil material. The results of additional numerical computation show that a 20% higher magnetic field can be achieved for an elliptical bore and racetrack bore coils with 1:10 ratio of the transverse dimensions of the bore than for a circular bore coil with the same larger transverse dimension of the bore, consumed power, and disk area.

physics.acc-ph↗

arXiv2004

Superconducting and Resistive Tilted Coil Magnets

The mathematical foundation is laid for a relatively new type of magnets generating uniform transverse field - tilted coil magnets. These consist of concentric nested solenoidal coils with elliptical turns tilted at a certain angle to the central axis and current flowing in opposite directions in the coils tilted at opposite angles, generating a perfectly uniform transverse field. Both superconducting wire-wound and resistive Bitter tilted coils are discussed. An original analytical method is used to prove that the wire-wound tilted coils have the ideal distribution of the axial linear current density - "cosine-theta". Magnetic fields are calculated for a tilted Bitter coil magnet using an original exact solution for current density in an elliptical Bitter disk. Superconducting wire-wound tilted coil magnets may become an alternative for traditional dipole magnets for accelerators, and Bitter tilted coil magnets are attractive for rotation experiments with a large access port perpendicular to the field.

physics.acc-ph↗