Design of magnets

Bending and quadrupole magnets for synchrotrons in NUMATRON project are designed. They are to be fabricated with lamination of thin oriented low carbon steel, the thickness of which should be less than 0.5 mm. They are designed with the following guide lines; (1) magnet core should have good symmetry (for example, two-fold symmetry for bending and four-fold symmetry for quadrupole magnet) and (2) end cuts should be made so as to enlarge the flat region of the effective length of the magnet. Bending magnet is designed by the modified window-frame type, because of its good field property and compactness. The gaps of the bending magnets are 80 and 60 mm for the 1-st and 2-nd rings, respectively and their maximum fields are designed as 15 and 18.5 kG, respectively. Quadrupole magnets are designed with the pole shape of hyperbola. Bore radii of the magnets are 90 and 57 mm for the 1-st and 2-nd synchrotrons, respectively. Their maximum field gradients are designed to be 1.5 and 1.7 kG/cm, respectively. (author)