You need JavaScript to view this

Frequency Chirping during a Fishbone Burst

Abstract

Full text: It is shown that gradual (more than a factor of two, in some cases - down to zero in the lab frame) reduction of the mode frequency (the so called frequency chirping) can be attributed to the reactive torque exerted on the plasma during the fishbone instability burst, which slows down the plasma rotation inside the q = 1 surface and reduces the mode frequency in the lab frame, while frequency in the plasma frame remains constant. This torque arises due to imbalance between the power transfered to the mode by energeric ions and the power of the mode dissipation by thermal species. Estimates show that the peak value of this torque exceeds the neutral beam torque in modern tokamaks and in ITER. The line-broadened quasilinear burst model, properly adapted for the fishbone case, is capable of reproducing the key features of the bursting mode. (author)
Authors:
Marchenko, V.; Reznik, S., E-mail: march@kinr.kiev.ua [1] 
  1. Institute for Nuclear Research, Kyiv (Ukraine)
Publication Date:
Sep 15, 2012
Product Type:
Conference
Report Number:
IAEA-CN-197; TH/P6-01
Resource Relation:
Conference: FEC 2012: 24. IAEA Fusion Energy Conference, San Diego, CA (United States), 8-13 Oct 2012; Related Information: In: 24. IAEA Fusion Energy Conference. Programme and Book of Abstracts| 789 p.
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; FISHBONE INSTABILITY; ITER TOKAMAK; ROTATING PLASMA; SURFACES; TORQUE
OSTI ID:
22192510
Research Organizations:
International Atomic Energy Agency, Vienna (Austria)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
TRN: XA13S0437016999
Availability:
Available from INIS in electronic form. Also available on-line: http://www-pub.iaea.org/MTCD/Meetings/PDFplus/2012/cn197/cn197_Programme.pdf
Submitting Site:
INIS
Size:
page(s) 376
Announcement Date:
Feb 20, 2014

Citation Formats

Marchenko, V., and Reznik, S., E-mail: march@kinr.kiev.ua. Frequency Chirping during a Fishbone Burst. IAEA: N. p., 2012. Web.
Marchenko, V., & Reznik, S., E-mail: march@kinr.kiev.ua. Frequency Chirping during a Fishbone Burst. IAEA.
Marchenko, V., and Reznik, S., E-mail: march@kinr.kiev.ua. 2012. "Frequency Chirping during a Fishbone Burst." IAEA.
@misc{etde_22192510,
title = {Frequency Chirping during a Fishbone Burst}
author = {Marchenko, V., and Reznik, S., E-mail: march@kinr.kiev.ua}
abstractNote = {Full text: It is shown that gradual (more than a factor of two, in some cases - down to zero in the lab frame) reduction of the mode frequency (the so called frequency chirping) can be attributed to the reactive torque exerted on the plasma during the fishbone instability burst, which slows down the plasma rotation inside the q = 1 surface and reduces the mode frequency in the lab frame, while frequency in the plasma frame remains constant. This torque arises due to imbalance between the power transfered to the mode by energeric ions and the power of the mode dissipation by thermal species. Estimates show that the peak value of this torque exceeds the neutral beam torque in modern tokamaks and in ITER. The line-broadened quasilinear burst model, properly adapted for the fishbone case, is capable of reproducing the key features of the bursting mode. (author)}
place = {IAEA}
year = {2012}
month = {Sep}
}