F. Bergsma et al., THE HEXAGONAL TOROIDAL AIR-CORE MAGNET OF THE CHORUS DETECTOR, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 357(2-3), 1995, pp. 243-248
We report on the hexagonally shaped toroidal air-core magnet used in t
he magnetic spectrometer of the CHORUS experiment at CERN. The novel a
nd unique features of this magnet are the radially-constant field over
its entire volume, with field lines straight and parallel to the hexa
gonal sides, and the negligibly small field-free region along its cent
ral axis. A detailed description of its construction and performance i
s given.