LINAC2026 - 33rd Linear Accelerator Conference

Operational Diagnostics and RF Monitoring for the TPS 150 MeV Linac and LTB Transfer Line

THPO025

20 Aug 2026, 16:00

2h

1F Exhibition Hall (Daejeon Convention Center)

Poster Presentation MC4.A01: Beam diagnostics THPO - Poster Session

Speaker

Chunyi Wu (National Synchrotron Radiation Research Center)

Description

The 150 MeV S-band electron linac is the primary injector for the Taiwan Photon Source (TPS) and supports routine top-up operation through the linac-to-booster (LTB) transfer line. The role of its diagnostic systems has gradually shifted from commissioning measurements to routine monitoring of RF conditions, charge transmission, bunch-related waveforms, beam position monitor (BPM) signals, and transverse beam profiles. The current monitoring system includes a Libera low-level RF (LLRF) platform for RF waveform and trend observation, a Libera Digit 500 for LTB integrating current transformer (ICT) readout, an oscilloscope-based wall current monitor (WCM), an ADQ7DC-based LTB BPM waveform digitizer, and calibrated screen-monitor image analysis. These GUI-based tools support routine injection checks and first-line fault diagnosis. The paper also discusses a future upgrade path based on an MTCA.4 digital LLRF (DLLRF) platform.