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Conference on Nuclear Training and Education: A Biennial International Forum (CONTE 2025)
February 3–6, 2025
Amelia Island, FL|Omni Amelia Island Resort
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A more open future for nuclear research
A growing number of institutional, national, and funder mandates are requiring researchers to make their published work immediately publicly accessible, through either open repositories or open access (OA) publications. In addition, both private and public funders are developing policies, such as those from the Office of Science and Technology Policy and the European Commission, that ask researchers to make publicly available at the time of publication as much of their underlying data and other materials as possible. These, combined with movement in the scientific community toward embracing open science principles (seen, for example, in the dramatic rise of preprint servers like arXiv), demonstrate a need for a different kind of publishing outlet.
M. Kaneko, S. Kobayashi, Y. Suzuki, T. Mizuuchi, K. Nagasaki, H. Okada, Y. Nakamura, K. Hnatani, S. Murakami, K. Kondo, F. Sano
Fusion Science and Technology | Volume 50 | Number 3 | October 2006 | Pages 428-433
Technical Paper | Stellarators | doi.org/10.13182/FST06-A1265
Articles are hosted by Taylor and Francis Online.
In the Heliotron J device, the configuration effects on the particle confinement are studied experimentally with tangentially injected neutral beams and a charge-exchange (CX) neutral particle analyzer (NPA) system. The hydrogen neutral beam are co-injected into deuterium plasmas heated by electron cyclotron heating. The detected CX flux increases, as the CX-NPA is oriented to the beam-facing direction. The behavior of the CX flux is studied by changing one of the Fourier components in the magnetic field, the bumpiness component, B04/B00, from 0.01 to 0.15. Here, Bmn is the Fourier component of the magnetic field strength in the Boozer coordinates where the subscript m/n denotes poloidal/toroidal mode numbers. The dependence of the CX flux on the configurations and pitch angle, which represents the change of the loss cone shape predicted by noncollisional orbit calculation, is observed. The bulk deuterium temperature slightly increases with increasing the bumpiness component. The decay time of the CX flux just after the neutral beam is turned off becomes longer with increasing the bumpiness component. By comparison of observation and calculation of the Fokker-Planck equation, the loss time of fast ions in the high-bumpiness configuration is longer than that of the standard configuration in Heliotron J.
