Speaker
Yasuyuki Sugiyama
(KEK/J-PARC)
Description
The J-PARC Main Ring (MR) is a high-intensity proton synchrotron that accelerates protons from 3 GeV to 30 GeV.
Its output beam power for fast extraction reached 830 kW, corresponding to 2.37 × 10$^{14}$ protons per pulse in March 2025.
Coupled bunch oscillation is well suppressed with the newly installed LLRF control system for the MR.
Instead of the coupled bunch instability, longitudinal microwave instability is observed in the later part of the acceleration.
A new high-speed digitizer is introduced into the LLRF system to monitor the microwave instability.
In this presentation, we present the configuration of the digitizer and its preliminary status.
| Abstract Category | Hardware |
|---|
Author
Yasuyuki Sugiyama
(KEK/J-PARC)
Co-authors
Fumihiko Tamura
(Japan Atomic Energy Agency, J-PARC Center)
Prof.
Kiyomi Seiya
(KEK/J-PARC)
Mr
Masahito Yoshii
(KEK/J-PARC)
