In pursuit of maximizing the performance of the Taiwan Photon Source (TPS), we conducted a feasibility study aimed at reassessing and optimizing the lattice configuration within the existing tunnel infrastructure. One of our main objective is to minimize displacement of source points for insertion devices (IDs) while augmenting overall beam performance. To achieve this, we propose an upgraded lattice design based on the multi-bend achromatic (MBA) scheme, featuring 5 bending achromat (5BA) in each arc. This report discusses the challenges encountered and presents preliminary results regarding the implementation of this 5BA lattice design.

The Nonlinear Injection Kicker (NIK) scheme for the Taiwan Photon Source (TPS) has been under study as a potential replacement for the current bump-based injection scheme. The evaluation encompasses three phases of the NIK scheme. In phases I and II, the orig-inal Booster to Storage Ring Transfer Line (BTS) is utilized to assess the performance of a prototype NIK. Phase III involves the redesigning of the BTS within the NIK injection scheme, thereby freeing up space occupied by the original four kickers used in the bump-based injection, for the insertion of devices. The positions of the NIKs, considerations, and limitations regarding the design of the new BTS, as well as other related issues, are thoroughly discussed.

The paper outlines the successful implementation of a global tune feedback system at the Taiwan Photon Source (TPS) to compensate the tune variation resulting from adjustments in the gap and phase of the insertion devices. The global tune feedback system deployed in the TPS employs two families of quadrupole magnets to sustain betatron tunes at the desired working point. The adjustment currents (feedback quantities) are crucial for this process, which are calculated from a tune response matrix derived from the lattice model, with tune shift quantities provided by the bunch-by-bunch feedback system, and the algorithm of singular value decomposition (SVD).