Magnets design for Iranian Light Source Facility storage ring

• Farhad Saeidi (IPM, Iranian Light Source Facility)

The Iranian Light Source Facility (ILSF) is a 3 GeV synchrotron radiation laboratory which is in the detailed design stage, and the main building site is being excavated in Qazvin, 150 km from Tehran. The ILSF storage ring (SR) is based on a Five-Bend Achromat (5BA) lattice providing an ultra-low beam emittance of 270 pm rad. The ring is comprised of 100 combined dipole magnets, 240 quadrupoles, and 320 sextupoles with additional coils as dipole and skew quadrupole correctors. In this webinar, some design features of the SR magnets, along with their detailed physical design, are debated. The corresponding electrical and cooling calculations and mechanical layouts are investigated as well. Magnetic cross-talk due to the small free space between the magnets of a machine may result in significant distortions of the magnetic field integration and performance distortion of the machine. This webinar also presents the preparation done at ILSF on integrated magnetic components of three storage ring (SR) magnets with minimum space between the yokes, modeled separately in Opera-3D code and accumulatively as in the lattice design. The probable deviation on the higher-order integrated multipoles together with harmonic fields along the beam trajectory are discussed, and some studies are introduced to cut down any deficient effects.