IPAC'25 - the 16th International Particle Accelerator Conference

Design and simulation of sub-harmonic bunchers for beam bunching efficiency in PLS-II linac

TUPM017

3 Jun 2025, 16:00

2h

Exhibiton Hall A _Magpie (TWTC)

Poster Presentation MC2.A08 Linear Accelerators Tuesday Poster Session

Speaker

Chanmi Kim (Pohang Accelerator Laboratory)

Description

Pohang Light Source-II (PLS-II) is a third-generation synchrotron light source operated by the Pohang Accelerator Laboratory (PAL) since 2012. This study was conducted as a preliminary investigation for upgrading the linac to improve the beam operation efficiency of PLS-II. In this system, beam bunching is initially performed using a pre-buncher operating at the same frequency. To achieve more efficient beam bunching, we considered sub-harmonic buncher (SHB). Two cavities with frequencies of 1 GHz and 500 MHz were designed and beam dynamics simulations were performed, taking into account the available installation space. By comparing the bunch length of beam and other beam parameters for each cavity, we confirmed that the SHB could improve injection efficiency compared to the pre-buncher.