Optimization and Measurements on the Double Mini-Betay Lattice in the TPS Storage Ring

Abstract

The Taiwan Photon Source (TPS) is capable of operating in multi-bunch and single-bunch mode. To operate in a hybrid mode as requested by users, we developed a lattice with chromaticities of 0.8/2 (ξx/ξy) to provide higher single bunch currents. Beam dynamics simulations and lattice characterizations including dynamic aperture, frequency map analysis, tune shift with energy, tune shift with amplitude, and betatron coupling will be discussed in this report.

The alignment results of the tandem EPU at Taiwan Photon Source

“…Tandem undulators are allocated to three 12-meter-long straights, which separate eight cells to maintain the symmetry of optical functions. A quadrupole triplet is positioned in the center of the 12-meter-long straight to minimize the beta y at the core of each undulator [2]. Figure 1 compares optical functions with and without the quadrupole triplet.…”