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Your search keyword '"Yoshimoto, M."' showing total 13 results
Start Over Author "Yoshimoto, M." Journal ieee transactions on applied superconductivity
13 results on '"Yoshimoto, M."'

2. Field measurement of DC magnets at 3-GeV RCS in J-PARC

Author

Yoshimoto, M., Ueno, T., Togashi, T., Toyokawa, Y., Takeda, O., Watanabe, M., Yamazaki, Y., Yamamoto, K., Kamiya, J., Takayanagi, T., Kanazawa, K., Kuramochi, M., and Kinsho, M.

Subjects
Direct current -- Evaluation, Magnetic fields -- Measurement, Superconducting magnets -- Electric properties, Superconducting magnets -- Design and construction, Synchrotron -- Evaluation, Business, Electronics, Electronics and electrical industries
Abstract

The field measurements of all DC magnets in the J-PARC rapid cycling synchrotron (RCS) are described. The results of the field measurements have confirmed the design performance of the DC magnets, which are installed in the RCS main tunnel.

Published
2008

3. Design and construction of septum magnets at 3-GeV RCS in J-PARC

Author

Yoshimoto, M., Ueno, T., Togashi, T., Takeda, O., Kanazawa, K., Watanabe, M., Yamazaki, Y., Kamiya, J., Takayanagi, T., Kuramochi, M., Kinsho, M., Irie, Y., Hujimori, H., Igarashi, S., and Nakayama, H.

Subjects
Magnetic fields -- Measurement, Superconducting magnets -- Design and construction, Synchrotron -- Evaluation, Business, Electronics, Electronics and electrical industries
Abstract

The development and production of the septum magnets and the magnetic field measurements are described. The field measurements of the septum magnets have shown that both the strength and also gradient of the magnetic leakage field are diminished.

Published
2008

4. Magnetic field mapping and excitation test in vacuum for the kicker magnet in J-PARC RCS

Author

Kamiya, J., Kinsho, M., Kuramochi, M., Takayanagi, T., Takeda, O., Ueno, T., Watanabe, M., Yamamoto, K., Yamazaki, Y., and Yoshimoto, M.

Subjects
Voltage -- Evaluation, Magnetic fields -- Measurement, Superconducting magnets -- Design and construction, Business, Electronics, Electronics and electrical industries
Abstract

The magnetic field measurement is performed for the kicker magnet in RCS in J-PARC facility. The reduction of outgassing rate by baking is very effective to suppress the discharge and the continuous excitation has a conditioning effect for the stable operation.

Published
2008

5. Measurement of the paint magnets for the beam painting injection system in the J-PARC 3-GeV RCS

Author

Takayanagi, T., Kanazawa, K., Ueno, T., Someya, H., Harada, H., Irie, Y., Kinsho, M., Yamazaki, Y., Yoshimoto, M., Kamiya, J., Watanabe, M., and Kuramochi, M.

Subjects
Synchrotron -- Analysis, Magnetic fields -- Analysis, Particle accelerators -- Design and construction, Business, Electronics, Electronics and electrical industries
Abstract

The distributions of the integrated magnetic field both the horizontal paint bump magnet and the vertical paint magnet are measured. The results have shown the required accuracy and the tracking error less than 1.0% for 1.0 [micro]s pulse current is satisfied with the multiply connected IGBT chopper units.

Published
2008

6. Improvement of the shift bump magnetic field for a closed bump orbit of the 3-GeV RCS in J-PARC

Author

Takayanagi, T., Kanazawa, K., Ueno, T., Someya, H., Harada, H., Irie, Y., Kinsho, M., Yamazaki, Y., Yoshimoto, M., Kamiya, J., Watanabe, M., Kuramochi, M., and Satou, K.

Subjects
Magnetic fields -- Analysis, Particle accelerators -- Analysis, Synchrotron -- Design and construction, Business, Electronics, Electronics and electrical industries
Abstract

The short search coil and the long search coil are used for in order to measure the magnetic field distribution accurately. The magnetic field distribution after installation in the injection area of the 3-GeV RCS is measured to consider the influence of the vacuum chamber and the results are compared.

Published
2008

7. Progress of Fundamental Technology R&D Toward Accelerator Magnets Using Coated Conductors in S-Innovation Program

Author

Amemiya, Naoyuki, Zheming, Zhang, Sano, T., Sogabe, Y., Ogitsu, Toru, Koyanagi, K., Kurusu, T., Mori, Y., Iwata, Yoshiyuki, Noda, Koji, and Yoshimoto, M.

Abstract

We report the progress of an R&D project of fundamental technologies for cryocooler-cooled accelerator magnets using coated conductors funded by the Japan Science and Technology Agency under its S-Innovation Program. Its target applications include carbon cancer therapy and accelerator-driven subcritical reactor. We have been carrying out design studies of HTS magnets for spiral sector fixed-field alternating gradient accelerators to show their feasibility for the target applications and to clarify the requirements of winding technologies. A three-dimensional winding machine has been developed to fabricate a model magnet in which winding technologies required for the designed magnet are implemented. With respect to the large magnetization of coated conductors, which is one of the big concerns on their uses in accelerator magnets, the magnetic field measurements using rotating pick-up coils have been made to clarify its influence on the multipole components of the magnetic field. A method for numerical electromagnetic field analyses of coils with three-dimensional shapes has been developed to predict the influence of magnetization on the field quality of magnets.

Published
2015

12. Development of a Prototype Superconducting Magnet for the FFAG Accelerator.

Author

Obana, T., Ogitsu, T., Nakamoto, T., Sasaki, K., Yamamoto, A., Yoshimoto, M., Mori, Y., Fujii, T., Iwasa, M., and T. Orikasa

Subjects
MAGNETIC fields, MAGNETS, ELECTRIC coils, ELECTRIC conductivity, ELECTRONICS, RESEARCH
Abstract

A superconducting magnet for the Fixed Field Alternating Gradient (FFAG) accelerator has been proposed. The static magnetic field is required to be proportional to the k-th power of the orbit radius where k is the geometrical field index of the accelerator. A left/right asymmetric coil with elliptical aperture is utilized to maximize the horizontal aperture with a compact design. The saddle shaped coil configuration is designed to fulfill the design requirement in terms of integral magnetic field along an arc orbit. In a beam tracking simulation, a particle was circulated and accelerated with the magnetic field generated by the designed coil. A prototype superconducting coil with a cylindrical bore was developed and the field quality was evaluated at warm field measurement. [ABSTRACT FROM AUTHOR]

Published
2006
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13. Magnetic Field Design of a Superconducting Magnet for a FFAG Accelerator.

Author

Obana, T., Ogitsu, T., Nakamoto, T., Sasaki, K., Yamamoto, A., Orikasa, T., Yoshimoto, M., and Mori, Y.

Subjects
MAGNETICS, MAGNETIC fields, ELECTROMAGNETIC waves, SUPERCONDUCTING magnets, SUPERCONDUCTORS, PHYSICS
Abstract

A superconducting magnet for a Fixed Field Alternating Gradient (FFAG) accelerator is proposed. The static magnetic field is required to be proportional to the k-th power of the orbit radius where k is the geometrical field index of the accelerator. The left/right asymmetric coil with elliptical aperture is introduced to maximize the horizontal aperture with a compact magnet design. The 3D coil configuration is designed to meet the requirement in terms of integral magnetic field. The 3D magnetic field is evaluated and the field integral along the beam trajectory satisfies the beam optics requirement of the FFAG accelerator. [ABSTRACT FROM AUTHOR]

Published
2005
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