Abstract
The magnitude of geodesic acoustic modes (GAMs) is analyzed, which are driven by the oscillating Reynolds stress force in poloidal direction in the limit cycle oscillation (LCO) of tokamaks near the condition of H-mode transition. Although the frequency of LCO is much lower than the natural frequency, the forced oscillation of GAMs at the LCO frequency is excited. The amplitude of excited GAMs can be similar to that of low frequency zonal flows. The result is compared with the observation of the JFT-2M tokamak.
| Original language | English |
|---|---|
| Article number | 092001 |
| Journal | Plasma Physics and Controlled Fusion |
| Volume | 57 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - Jul 30 2015 |
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All Science Journal Classification (ASJC) codes
- Nuclear Energy and Engineering
- Condensed Matter Physics
Cite this
Contribution of geodesic acoustic modes in the limit cycle oscillation near H-mode transition in JFT-2M plasmas. / Itoh, K.; Kobayashi, T.; Ido, T.; Itoh, Sanae; Kamiya, K.
In: Plasma Physics and Controlled Fusion, Vol. 57, No. 9, 092001, 30.07.2015.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Contribution of geodesic acoustic modes in the limit cycle oscillation near H-mode transition in JFT-2M plasmas
AU - Itoh, K.
AU - Kobayashi, T.
AU - Ido, T.
AU - Itoh, Sanae
AU - Kamiya, K.
PY - 2015/7/30
Y1 - 2015/7/30
N2 - The magnitude of geodesic acoustic modes (GAMs) is analyzed, which are driven by the oscillating Reynolds stress force in poloidal direction in the limit cycle oscillation (LCO) of tokamaks near the condition of H-mode transition. Although the frequency of LCO is much lower than the natural frequency, the forced oscillation of GAMs at the LCO frequency is excited. The amplitude of excited GAMs can be similar to that of low frequency zonal flows. The result is compared with the observation of the JFT-2M tokamak.
AB - The magnitude of geodesic acoustic modes (GAMs) is analyzed, which are driven by the oscillating Reynolds stress force in poloidal direction in the limit cycle oscillation (LCO) of tokamaks near the condition of H-mode transition. Although the frequency of LCO is much lower than the natural frequency, the forced oscillation of GAMs at the LCO frequency is excited. The amplitude of excited GAMs can be similar to that of low frequency zonal flows. The result is compared with the observation of the JFT-2M tokamak.
UR - http://www.scopus.com/inward/record.url?scp=84942845915&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84942845915&partnerID=8YFLogxK
U2 - 10.1088/0741-3335/57/9/092001
DO - 10.1088/0741-3335/57/9/092001
M3 - Article
AN - SCOPUS:84942845915
VL - 57
JO - Plasma Physics and Controlled Fusion
JF - Plasma Physics and Controlled Fusion
SN - 0741-3335
IS - 9
M1 - 092001
ER -