Both common-mode and normal-mode noises of ac system of power supply of IGBT type are clearly identified from observation on waveforms of ac line voltage and current. These noises resemble noises of dc output of power supply of thyristor type. A new method of noise filtering for ac system of power supply is proposed on the basis of a noise filtering device for dc output which is well-established and is effective against noises with both common-mode and normal-mode. A combination of noise filtering devices for ac system and dc output is useful to noise reduction not only for acdc converter but also for other converters such as dc-ac, ac-dc-ac, and dc-ac-dc.

A novel internal target, SCRIT (Self-confining Radioactive Ion Target), has been developed in an electron storage ring KSR. An “ion trapping” phenomenon in an electron storage ring was successfully utilized for the first time to form the target for electron scattering. This technology will make electron scattering off short-lived radioactive nuclei possible. Stable ¹³³Cs ions of the number of 7×10⁶ were three-dimensionally trapped in the electron beam axis for 85 ms at 80 mA of the electron beam current. The collision luminosity between stored electrons and trapped Cs ions was found to be 2.4(8)×10²⁵/(cm²s) by measuring the elastically scattered electrons.

The TIARA (Takasaki Ion accelerators for Advanced Radiation Application) is a unique worldwide facility for advancing the frontiers of biotechnology and materials science, consisting of four accelerators: a K110 AVF cyclotron, a 3-MV tandem accelerator, a 3-MV single-ended accelerator and a 400-kV ion implanter. The accelerator complex provides a variety of ion species from proton to bismuth in a wide energy range from keV to MeV. This report outlines the facility and the major beam applications, and describes the details of development of accelerator technology for biotechnology and materials science applications at TIARA.

The FUJI test beam line (FTBL), which was being built in the Fuji experimental hall of the KEKB accelerator, was completed in September 2007. Soon after the KEKB operation started in October, the first beam was observed to pass through the FTBL successfully. The hardware system, their installation and alignment are presented.

John Adams Institute for accelerator science aims to develop novel accelerator technologis such as linear collider and neutrino factory. There, Non-Scaling FFAG, a novel idea of fixed field accelerator, is developed for neutrino accelerator and practical applications In the letter, overviews of JAI and NS–FFAG development and life in Oxford are described.