C. Ichikawa

Stability study of intense hadron bunches in linear accelerators using a Paul ion trap

Masato Goto, C. Ichikawa, K. Ito, Kazunobu Kojima et autres

The collective behavior of an ion cloud confined in a linear Paul trap is physically almost equivalent to that of a relativistic beam traveling in a particle accelerator.This fact provides a new possibility for experimental beam-dynamics studies that can be done without …

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Coherent and incoherent space-charge effects in high-intensity hadron rings

H. Okamoto, M. Aoki, C. Ichikawa, Kazunobu Kojima et autres

A brief overview is given of the recent work done by the beam-physics group of Hiroshima University on resonant beam instabilities in high-intensity hadron rings. Emphasis is placed upon two essentially different instability mechanisms, namely, coherent and incoherent resonances that occur respectively …

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Density distribution of Li8 and 8B and capture reaction at low energy

G. W. Fan, Mitsuhiro Fukuda, D. Nishimura, X. L. Cai et autres

Reaction cross sections of $^{8}\mathrm{Li}$ on stable targets were measured at intermediate energies. With the existing experimental data of interaction cross sections at 790 MeV/nucleon the nucleon density distribution of $^{8}\mathrm{Li}$ was extracted by the use of the modified Glauber model. Meanwhile, …

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Structure of Li8 from a reaction cross-section measurement

G. W. Fan, Mitsuhiro Fukuda, D. Nishimura, X. L. Cai et autres

We have precisely measured reaction cross sections (${\ensuremath{\sigma}}_{R}$) for $^{8}\mathrm{Li}$ using $^{9}\mathrm{Be}$, ${}^{12}\mathrm{C}$, $^{27}\mathrm{Al}$, and proton targets at intermediate energies by the transmission method. From the energy dependence of the ${\ensuremath{\sigma}}_{R}$ including the high energy data, the density distribution of $^{8}\mathrm{Li}$ was …

Charge-changing interactions probing point-proton radii of nuclei

Satoru Yamaki, J. Kouno, D. Nishimura, Masayuki NAGASHIMA et autres

The question of whether charge-changing interactions can be used to probe point-proton radii of nuclei remains unanswered. Charge-changing cross sections, σcc, were systematically investigated using stable and unstable nuclear beams of intermediateenergy. The ratios of the experimental σcc values to the calculated …

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Performance of high-resolution position-sensitive detectors developed for storage-ring decay experiments

Takayuki Yamaguchi, F. Suzaki, T. Izumikawa, S. Miyazawa et autres

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