Speaker
Dr
Jiaoni Bai
(Institut für Kernphysik , Johannes Gutenberg-Universität Mainz)
Description
The Mainz Energy-recovering Superconducting Accelerator (MESA) is currently under construction at the Institut für Kernphysik (KPH) at Johannes Gutenberg-Universität Mainz. MESA is a multi-turn Energy Recovery Linac (ERL) and aims to serve as user facility for particle physics experiments. The RF-accelerating systems of MESA consist of two cryomodules, each with two 9-cell TESLA superconducting (SC) cavities, and eight normal conducting cavities. They operate in continuous wave (CW) mode. The MicroTCA.4 based digital low-level radio frequency (LLRF) system developed at DESY, Hamburg is adapted for the MESA cavities to guarantee a cavity accelerating field amplitude and phase RMS stabilities of 0.01% and 0.01$^{\circ}$.
In this presentation, a LLRF system test with a stand alone normal conducting MESA single cell buncher cavity is shown. The amplitude and phase stabilities of the test are 0.05% and 0.05$^{\circ}$ respectively, which are limited by the stability of the master oscillator of the test bench. Furthermore, the overview of the LLRF system integration into the MESA cryomodules test bench at Helmholtz-Institut Mainz (HIM) test bunker is presented, as well as the preliminary LLRF test results at a temperature of 2 K. The RMS stability requirements are not yet reached due to the lack of the frequency detuning control and the controller parameter optimization. Both are still under development.
Primary author
Dr
Jiaoni Bai
(Institut für Kernphysik , Johannes Gutenberg-Universität Mainz)
Co-authors
Prof.
Florian Hug
(Institut für Kernphysik, Johannes Gutenberg Universität Mainz)
Mr
Frank Fichtner
(Institut für Kernphysik, Johannes Gutenberg Universität Mainz)
Prof.
Kurt Aulenbacher
(Institut für Kernphysik, Johannes Gutenberg Universität Mainz)
Dr
Robert Heine
(Institut für Kernphysik, Johannes Gutenberg Universität Mainz)
