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beam line separationIshii, Yasuyuki; Chiba, Atsuya; Uno, Sadanori; Saito, Yuichi; Mizuhashi, Kiyoshi; Tajima, Satoshi*; Kamiya, Tomihiro
Nuclear Instruments and Methods in Physics Research B, 260(1), p.15 - 19, 2007/07
Times Cited Count：0 Percentile：0.01(Instruments & Instrumentation)Measurement of beam energy spreads caused by an accelerator are needed to evaluation the choromatic aberration when ion beams with micorometer or nanometer sizes are formed at a focusing point. A measurement method of the beam energy spreads without using a analyzing magnet with a high resolution was developed to evaluate the chromatic aberration in a light-ion micorbeam system connected to the 3MV JAEA single-ended accelerator. The accurate beam energy spread measurement method within a resolution of 10
was developed using resonance nuclear reactions with narrow energy spreads of 
A
(p,
)
Si and 
Mg(p,)
A in a MeV energy range. Furthermore, ion species separating method, in a 0-degree beam line connected to the accelerator, was developed using parmanent magnets attached on the accelerator tube in the accelerator. The two kinds of developmet resulted in measuring baem energy spreads generated from the accelerator directly.
Chiba, Atsuya; Saito, Yuichi; Tajima, Satoshi
Nuclear Instruments and Methods in Physics Research B, 232(1-4), p.32 - 36, 2005/05
Times Cited Count：10 Percentile：58.92(Instruments & Instrumentation)The structure of cluster ion may be important parameter for resolution of physical effect and interaction with cluster ion and solid. In this paper, we report a Coulomb explosion imaging of the constituent atoms of a swift carbon cluster (Cn, n=2, 3 and 6) passing through a thin foil and their average charge state that related with the structure of the cluster. The experimental setup is based on the 3MV TANDEM accelerator at the JAERI Takasaki. The cluster ion beam is pulsed by electrical deflection plates and an aperture. A few clusters pass trough the thin foil during 1 second, and the resulting are collected by the luminance plate detector. The average charge state was shown an almost same tendency as calculate theoretical value.
Okoshi, Kiyonori; Chiba, Atsuya; Mizuhashi, Kiyoshi; Tajima, Satoshi
JAERI-Review 2004-025, TIARA Annual Report 2003, p.324 - 325, 2004/11
no abstracts in English
Nakamura, Yoshiteru; Nara, Takayuki; Agematsu, Takashi; Ishibori, Ikuo; Kurashima, Satoshi; Fukuda, Mitsuhiro; Okumura, Susumu; Yokota, Wataru; Arakawa, Kazuo; Miyawaki, Nobumasa; et al.
KEK Proceedings 2003-19, p.8 - 13, 2004/03
Takasaki Ion Accelerators for Advanced Radiation Application (TIARA) facility at JAERI Takasaki was constructed to promote the various researches of wide field for materials science and biotechnology. The AVF cyclotron system, which is the one of four ion accelerators in TIARA, has been smoothly operated without any serious troubles since the first beam extraction in March 1991. The operation time for a year is about 3200 hours on an average through recent 8 years. In especial, the cyclotron system is needed the frequent alteration of operation condition according to many kinds of ion species required from the experimenters. On the other hand, because of the improvement of the beam quality, intensity and reliability, we have carried out continuously so far many reconstruction and development, several items of which are the renewal of a computer control system, reinforcement of the ion source, acceleration technique for some series of cocktail beams, stabilization of the cyclotron beam and design of a new gradient corrector including an active coil. Furthermore, now we are advancing various countermeasure to form the micro beam of 1mm size by means of focused type, such as the introduction of a flat-top acceleration system, reconstruction of the cyclotron center region, installation of a pair of precise micro slit systems in the trunk beam transport line, and so on.
Agematsu, Takashi; Arakawa, Kazuo; Okumura, Susumu; Nakamura, Yoshiteru; Tajima, Satoshi
KEK Proceedings 2003-19, p.27 - 29, 2004/03
Cyclotron start-up operations require dozens of adjustable parameters to be tuned to maximize extracted beam current. Experienced operators perform this process through trial and error using their experience and intuition. However, the process is difficult for inexperienced operators because operator need to adjust parameters using little information such as measured beam data, alarm, status of components, and so on. We have developed a computer-based visual assistance system for JAERI AVF cyclotron. The system provides a CRT display: the cyclotron beam trajectories, feasible setting regions, search traces and the beam envelopes for external beam transport designed to optimize beam parameter adjustment. The evaluation experiment for the system was carried out and the operation time to reach required beam conditions of the injection region of the cyclotron was reduced by approximately 65%. Also the system is very useful to study the problems on the beam transport such as beam trajectory, envelope, beam profile, spot size and so on.
Okoshi, Kiyonori; Takada, Isao; Mizuhashi, Kiyoshi; Uno, Sadanori; Chiba, Atsuya; Saito, Yuichi; Ishii, Yasuyuki; Sakai, Takuro; Tajima, Satoshi
Dai-16-Kai Tandemu Kasokuki Oyobi Sono Shuhen Gijutsu No Kenkyukai Hokokushu, p.36 - 39, 2004/02
no abstracts in English
Uno, Sadanori; Tajima, Satoshi; Takada, Isao; Takayama, Terumitsu*; Koka, Masashi*; Moriya, Yoshinori*; Ebina, Tetsuya*
Dai-16-Kai Tandemu Kasokuki Oyobi Sono Shuhen Gijutsu No Kenkyukai Hokokushu, p.75 - 79, 2004/02
no abstracts in English
Okoshi, Kiyonori; Chiba, Atsuya; Mizuhashi, Kiyoshi; Tajima, Satoshi
Dai-17-Kai Tandemu Kasokuki Oyobi Sono Shuhen Gijutsu No Kenkyukai Hokokushu, p.138 - 140, 2004/00
no abstracts in English
Chiba, Atsuya; Saito, Yuichi; Tajima, Satoshi
Dai-17-Kai Tandemu Kasokuki Oyobi Sono Shuhen Gijutsu No Kenkyukai Hokokushu, p.89 - 92, 2004/00
no abstracts in English
Mizuhashi, Kiyoshi; Uno, Sadanori; Okoshi, Kiyonori; Chiba, Atsuya; Saito, Yuichi; Ishii, Yasuyuki; Sakai, Takuro; Tajima, Satoshi
Dai-17-Kai Tandemu Kasokuki Oyobi Sono Shuhen Gijutsu No Kenkyukai Hokokushu, p.5 - 8, 2004/00
The three electrostatic accelerators were smoothly operated according to an allotted beam time. The total operation time for each accelerator in FY 2003 was 1,988 hours for the tandem accelerator, 2,286 hours for the single-ended accelerator and 1,773 hours for the 400kV ion implanter, respectively. The difference in the operating time between these accelerators dependent on the complexity of the ion source and the generating the quantities of ion species. And present state of 3MV tandem accelerator is reported.
Chiba, Atsuya; Ishii, Yasuyuki; Tajima, Satoshi
JAERI-Review 2003-033, TIARA Annual Report 2002, p.327 - 329, 2003/11
no abstracts in English
) ions by freeman ion sourceOkoshi, Kiyonori; Saito, Yuichi; Orimo, Takao*; Omae, Akiomi*; Takada, Isao; Tajima, Satoshi
JAERI-Review 2003-033, TIARA Annual Report 2002, p.323 - 324, 2003/11
no abstracts in English
Agematsu, Takashi; Fukuda, Mitsuhiro; Nakamura, Yoshiteru; Ishibori, Ikuo; Nara, Takayuki; Okumura, Susumu; Kurashima, Satoshi; Miyawaki, Nobumasa; Yoshida, Kenichi; Arakawa, Kazuo; et al.
JAERI-Review 2003-033, TIARA Annual Report 2002, p.315 - 316, 2003/11
On JAERI cyclotron, it is needed to study the problem that is the meander of the beam envelope along the micro-beam line and the other beam lines. The causes of the meander mainly come from that the position and direction of the beam are not alignment with designed beam trajectory. We evaluated the beam meander at HZ line. The verticaly 3mm beam shift at the cyclotron exit is amplified to 60mm at the beam line. This cause of beam shift comes from the level down of several magnets near the cyclotron, we corrected already. For improvement of the beam meander on the horizontal plane, we installed the steering magnet. Roughly we could correct the beam meander. Although there are slightly the beam meander. We will study more about this problem.
Chiba, Atsuya; Ishii, Yasuyuki; Tajima, Satoshi
Dai-15-Kai Tandemu Kasokuki Oyobi Sono Shuhen Gijutsu No Kenkyukai Hokokushu, p.74 - 76, 2003/03
no abstracts in English
Mizuhashi, Kiyoshi; Uno, Sadanori; Okoshi, Kiyonori; Chiba, Atsuya; Saito, Yuichi; Ishii, Yasuyuki; Sakai, Takuro; Kamiya, Tomihiro; Takada, Isao; Tajima, Satoshi
Dai-15-Kai Tandemu Kasokuki Oyobi Sono Shuhen Gijutsu No Kenkyukai Hokokushu, p.33 - 35, 2003/03
no abstracts in English
Mizuhashi, Kiyoshi; Uno, Sadanori; Chiba, Atsuya; Kitchen, R. L.*; Takada, Isao; Tajima, Satoshi
JNC TN7200 2001-001, p.80 - 83, 2002/01
no abstracts in English
Takada, Isao; Mizuhashi, Kiyoshi; Uno, Sadanori; Okoshi, Kiyonori; Nakajima, Yoshinori; Chiba, Atsuya; Saito, Yuichi; Ishii, Yasuyuki; Sakai, Takuro; Kamiya, Tomihiro; et al.
JNC TN7200 2001-001, p.134 - 137, 2002/01
no abstracts in English
Ishii, Yasuyuki; Chiba, Atsuya; Takada, Isao; Tajima, Satoshi
JNC TN7200 2001-001, p.100 - 104, 2002/01
no abstracts in English
Takada, Isao; Mizuhashi, Kiyoshi; Uno, Sadanori; Okoshi, Kiyonori; Nakajima, Yoshinori; Chiba, Atsuya; Saito, Yuichi; Ishii, Yasuyuki; Sakai, Takuro; Kamiya, Tomihiro; et al.
JAERI-Conf 2000-019, p.46 - 49, 2001/02
no abstracts in English
Saito, Yuichi; Mizuhashi, Kiyoshi; Tajima, Satoshi; Arakawa, Kazuo; Hirata, Koichi*; Kobayashi, Yoshinori*
JAERI-Conf 2000-019, p.93 - 96, 2001/02
no abstracts in English
