Speaker
Dr
Tetsuya Kobayashi
(KEK)
Description
SuperKEKB is a new project to upgrade the luminosity to 40 times higher than that of the KEKB accelerator. In order to obtain this high luminosity, the nano-beam scheme will be adopted at the interaction point, accordingly, low-emittance beam will be required. Furthermore, the stored beam current should be approximately twice as high as the KEKB. Therefore, for the high-current and high-quality beam acceleration without instability, accuracy and flexibility in accelerating field control are very significant.
For the SuperKEKB project, a new LLRF control system has been developed to realize high accuracy and flexibility. It is an FPGA-based digital RF feedback control system using 16-bit ADC's, which works on the µTCA platform. In this µTCA-module, the Linux-OS runs then it performs as the EPICS-IOC. This LLRF system is available to both of normal-conducting cavity and super-conducting cavity.
A prototype of the LLRF control system for the SuperKEKB was produced. Its basic performance of the RF control was evaluated by using a simulant cavity. The evaluation results and future issue for the operation will be presented in this report. The amplitude and phase stability in the feedback control is 0.03% and 0.02 degrees, respectively. It is sufficiently stable for the SuperKEKB.
Primary author
Dr
Tetsuya Kobayashi
(KEK)
Co-authors
Mr
Atsushi Kabe
(KEK)
Mr
Hisakuni Deguchi
(Mitsubishi Electric TOKKI System Corp.)
Mr
Jun-ichi Nishio
(Mitsubishi Electric TOKKI System Corp.)
Mr
Jun-ichi Odagiri
(KEK)
Prof.
Kazunori Akai
(KEK)
Kazutaka Harumatsu
(Mitsubishi Electric TOKKI System Corp.)
Kazutaka Hayashi
(Mitsubishi Electric TOKKI System Corp.)
Dr
Kiyokazu Ebihara
(KEK)
Dr
Kota Nakanishi
(KEK)
Masatsugu Ryoshi
(Mitsubishi Electric TOKKI System Corp.)
Dr
Michiru Nishiwaki
(KEK)
