Gyrokinetic investigations of the electromagnetic geodesic acoustic mode. (1st September 2022)
- Record Type:
- Journal Article
- Title:
- Gyrokinetic investigations of the electromagnetic geodesic acoustic mode. (1st September 2022)
- Main Title:
- Gyrokinetic investigations of the electromagnetic geodesic acoustic mode
- Authors:
- Xie, Baoyi
Ye, Lei
Chen, Yang
Zhao, Pengfei
Guo, Wenfeng
Xiang, Nong - Abstract:
- Abstract: The linear characteristics of the electromagnetic geodesic acoustic mode (GAM) are investigated numerically with the gyrokinetic code GEM. The results indicate that the electromagnetic effect has little influence on the frequency and damping rate of the GAM. The results also show that both m = 1 and m = 2 poloidal magnetic components of the GAM exist, and the m = 1 magnetic component has comparable sine and cosine components, while the m = 2 magnetic component is dominated by the sine component, where m is the poloidal mode number. In addition, the amplitudes of various magnetic components increase with respect to the ratio of plasma pressure to magnetic pressure β and safety factor q . Most importantly, the amplitude of the m = 1 magnetic component is comparable to, or even slightly larger than, that of the m = 2 magnetic component. It is also found that the trapped electron effect may be important for the magnetic components. Furthermore, the various magnetic components are compared with the previous analytical results and some discussions are given.
- Is Part Of:
- Plasma physics and controlled fusion. Volume 64:Number 9(2022)
- Journal:
- Plasma physics and controlled fusion
- Issue:
- Volume 64:Number 9(2022)
- Issue Display:
- Volume 64, Issue 9 (2022)
- Year:
- 2022
- Volume:
- 64
- Issue:
- 9
- Issue Sort Value:
- 2022-0064-0009-0000
- Page Start:
- Page End:
- Publication Date:
- 2022-09-01
- Subjects:
- geodesic acoustic mode -- electromagnetic effects -- gyrokinetic simulation -- magnetic components -- trapped electron effect
Plasma (Ionized gases) -- Periodicals
Controlled fusion -- Periodicals
530.44 - Journal URLs:
- http://ioppublishing.org/ ↗
http://iopscience.iop.org/0741-3335 ↗ - DOI:
- 10.1088/1361-6587/ac7ba7 ↗
- Languages:
- English
- ISSNs:
- 0741-3335
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - BLDSS-3PM
British Library STI - ELD Digital store - Ingest File:
- 22579.xml