Abstract
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.
| Original language | English |
|---|---|
| Article number | 2402003 |
| Journal | Plasma and Fusion Research |
| Volume | 14 |
| Issue number | Specialissue1 |
| DOIs | |
| Publication status | Published - Jan 1 2019 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
Cite this
A full wave simulation on the density dependence of a slow wave excitation in the GAMMA 10/PDX central cell with TASK/WF3D. / Ikezoe, Ryuya; Kubota, Yushi; Ichimura, Makoto; Hirata, Mafumi; Sumida, Shuhei; Jang, Seowon; Izumi, Koki; Tanaka, Atsuto; Sekine, Ryo; Kayano, Hiroki; Shima, Yoriko; Kohagura, Junko; Yoshikawa, Masayuki; Sakamoto, Mizuki; Nakashima, Yousuke; Fukuyama, Atsushi.
In: Plasma and Fusion Research, Vol. 14, No. Specialissue1, 2402003, 01.01.2019.Research output: Contribution to journal › Article
}
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
PY - 2019/1/1
Y1 - 2019/1/1
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
VL - 14
JO - Plasma and Fusion Research
JF - Plasma and Fusion Research
SN - 1880-6821
IS - Specialissue1
M1 - 2402003
ER -