Design of low emittance booster ring magnets for Iranian Light Source Facility[This paper is supported by Iranian Light Source Facility.]

Abstract

Iranian Light Source Facility (ILSF) is a 3 GeV synchrotron radiation laboratory in the detailed design stage. The main building site is being excavated in Qazvin, 150 km from Tehran. The Booster ring of this facility with a circumference of 504 m and a low emittance of 3.5 nm rad accelerates electrons from 150 MeV to 3 GeV. Using POISSON and OPERA codes, we designed the ILSF booster ring magnets including dipoles, quadrupoles, sextupoles, and separate correctors. Cooling and electrical calculations are done, and ramping effects are considered. The ILSF has also been attempting to practice mechanical designs and to build prototype magnets at this stage too.

Magnet design for Iranian Light Source Facility storage ring

“…Basic specifications of the quadrupole and sextupole magnets are provided in table 2 and table 3. In order to correct the distorted orbit and coupling correction, additional windings in 200 sextupole magnets are employed too [16].…”

“…The pole deflection due to magnetic force between the poles [15] and the coils and laminations weight is displayed in figure 12, with a maximum value about 15 µm. Nonetheless, the deflected pole deteriorates the field quality; it does not exceed the required value yet and leaves trivial cost for higher multipoles [16]. It should be mentioned such low deflection might be released easily by implementing endplates at both sides of the magnet or prolonging the return yoke.…”