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Dr. Makoto TOBIYAMA
Beam Monitor Group,
High Energy Accelerator Research Organization
List of published papers (PDF files)
- Development of Bunch by Bunch Feedback Systems for KEKB Accelerators.
- Study of beam instabilities.
In a storage ring which stores many bunches at high beam
current, especially in particle-factory machines, such as KEKB,
it is very likely that many strong coupled-bunch instabilities occur in
both the transverse and longitudinal planes.
Reduction of the impedances in the ring is
essential to suppress the instabilities.
However, we have observed strong transverse
coupled-bunch instabilities in both rings of KEKB. How we suppress
and analyze the instabilities
holds the key to achieving the designed qualities
of the accelerators.
To cure these
instabilities, we are now operating beam feedback systems
with a bunch-by-bunch scheme. My main theme of study is to
develop, improve and maintain the feedback systems. Also I am
working to develop the monitor systems to analyse
unknown beam instabilities.
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