TY - JOUR
T1 - A full wave simulation on the density dependence of a slow wave excitation in the GAMMA 10/PDX central cell with TASK/WF3D
AU - Ikezoe, Ryuya
AU - Kubota, Yushi
AU - Ichimura, Makoto
AU - Hirata, Mafumi
AU - Sumida, Shuhei
AU - Jang, Seowon
AU - Izumi, Koki
AU - Tanaka, Atsuto
AU - Sekine, Ryo
AU - Kayano, Hiroki
AU - Shima, Yoriko
AU - Kohagura, Junko
AU - Yoshikawa, Masayuki
AU - Sakamoto, Mizuki
AU - Nakashima, Yousuke
AU - Fukuyama, Atsushi
N1 - Publisher Copyright:
© 2019 The Japan Society of Plasma Science and Nuclear Fusion Research.
PY - 2019
Y1 - 2019
N2 - Beach heating using a slow Alfvén wave in ion cyclotron range of frequencies would be the first candidate for ion heating in a DEMO-relevant divertor testing linear plasma device if it is applicable to a high-density regime. To clarify its availability, the density dependence of a slow wave excitation is investigated using a full wave simulation with TASK/WF3D code in the GAMMA 10/PDX central cell configuration, where there is an extensive track record of a beach heating. A shielding effect is successfully demonstrated and well understood under a three-dimensional configuration in the limit of cold plasma approximation. As the density increases, excitable left-handed electric field, which contributes to ion cyclotron heating, degrades more and more from a core region, and resultantly the ion absorption region goes outwards with reducing its power. For core densities above 1020 m-3, the wave field exists only at a very edge, and ion heating becomes negligible unless the wave frequency is much increased with a correspondent magnetic field enhancement.
AB - Beach heating using a slow Alfvén wave in ion cyclotron range of frequencies would be the first candidate for ion heating in a DEMO-relevant divertor testing linear plasma device if it is applicable to a high-density regime. To clarify its availability, the density dependence of a slow wave excitation is investigated using a full wave simulation with TASK/WF3D code in the GAMMA 10/PDX central cell configuration, where there is an extensive track record of a beach heating. A shielding effect is successfully demonstrated and well understood under a three-dimensional configuration in the limit of cold plasma approximation. As the density increases, excitable left-handed electric field, which contributes to ion cyclotron heating, degrades more and more from a core region, and resultantly the ion absorption region goes outwards with reducing its power. For core densities above 1020 m-3, the wave field exists only at a very edge, and ion heating becomes negligible unless the wave frequency is much increased with a correspondent magnetic field enhancement.
UR - http://www.scopus.com/inward/record.url?scp=85063648461&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85063648461&partnerID=8YFLogxK
U2 - 10.1585/pfr.14.2402003
DO - 10.1585/pfr.14.2402003
M3 - Article
AN - SCOPUS:85063648461
VL - 14
JO - Plasma and Fusion Research
JF - Plasma and Fusion Research
SN - 1880-6821
IS - Specialissue1
M1 - 2402003
ER -