Review of Scientific Instruments
Feedback | Help | Exit
Review of Scientific Instruments
Search:
   
 
 
 
Previous Article
Reconstruction of edge density profiles on Large Helical Device using ultrashort-pulse reflectometry
Reflectometry has been expected to be one of the key diagnostics to measure density profiles. We have applied an ultrashort-pulse reflectometry (USPR) system to Large Helical Device in the National In...
Next Article
Scrape-off layer reflectometer for Alcator C-Mod
A two-frequency x-mode reflectometer operating from 100 to 146 GHz is deployed on Alcator C-Mod to measure the density profile and fluctuations in the scrape-off layer (SOL) immediately in front of th...

Detection of zonal flow spectra in DIII-D by a dual-channel Doppler backscattering system

Rev. Sci. Instrum. 79, 10F113 (2008); doi:10.1063/1.2953675

Published 31 October 2008

You are not logged in to this journal. Log in

L. Schmitz,1 G. Wang,1 J. C. Hillesheim,1 T. L. Rhodes,1 W. A. Peebles,1 A. E. White,1 L. Zeng,1 T. A. Carter,1 and W. Solomon2
1UCLA Physics and Astronomy Department, Los Angeles, California 90095-1547, USA
2Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543-0451, USA
Doppler backscattering (DBS) has been successfully used to measure the E×B flow velocity and local intermediate wavenumber density fluctuation levels in the DIII-D tokamak. Depending on the launch angle and the frequency of the probing beam, the signal backscattered from the plasma cut-off layer is sensitive to density fluctuations at a specific perpendicular wavenumber (1<=k[perpendicular]rhos<=4). Due to the localization and high time resolution for poloidal flow measurements, DBS is well suited to detect stationary and time-dependent shear flows [zonal flows (ZFs)]. We present a novel scheme to measure ZF spectra using a dual-channel DBS system capable of simultaneously probing two minor radii separated by a distance of 0.2  cm<Deltar<3  cm. Frequency spectra of geodesic acoustic modes and low frequency ZFs (f<=10  kHz) have been obtained for 0.6<r/a<0.95. ©2008 American Institute of Physics
History: Presented 14 May 2008; received 12 May 2008; accepted 16 May 2008; published 31 October 2008
Permalink: http://link.aip.org/link/?RSINAK/79/10F113/1
BUY THIS ARTICLE   (US$24)
Download PDF (221 kB) View Cart

KEYWORDS and PACS

Keywords
PACS
  • 52.30.-q
    Plasma dynamics and flow
  • 52.55.Fa
    Tokamaks
  • 52.70.Gw
    Radio-frequency and microwave plasma diagnostic measurements
  • 52.25.Gj
    Plasma fluctuation and chaos phenomena
  • 52.35.Ra
    Plasma turbulence
  • YEAR: 2008

RELATED DATABASES


To view database links for this article,
you need to log in.
To view database links for this article,
you need to log in.

PUBLICATION DATA

ISSN:
0034-6748 (print)   1089-7623 (online)
Publisher:
AIP is a member of CrossRef AIP

REFERENCES (14)
View in Separate Window/Tab
For access to fully linked references, you need to log in. For access to fully linked references, you need to Log in.
  1. P. H. Diamond, S.-I. Itoh, K. Itoh, and T. S. Hahm, Plasma Phys. Controlled Fusion 47, R35 (2005).
  2. A. Fujisawa, A. Shimizu, H. Nakano, S. Ohshima, K. Itoh, Y. Nagashima, S.-I. Itoh, H. Iguchi, Y. Yoshimura, T. Minami, K. Nagaoka, C. Takahashi, M. Kojima, S. Nishimura, M. Isobe, C. Suzuki, T. Akiyama, T. Ido, K. Matsuoka, S. Okamura, and P. H. Diamond, J. Phys. Soc. Jpn. 76, 033501 (2007).
  3. A. Fujisawa, K. Itoh, H. Iguchi, K. Matsuoka, S. Okamura, A. Shimizu, T. Minami, Y. Yoshimura, K. Nagaoka, C. Takahashi, M. Kojima, H. Nakano, S. Ohsima, S. Nishimura, M. Isobe, C. Suzuki, T. Akiyama, K. Ida, K. Toi, S.-I. Itoh, and P. H. Diamond, Phys. Rev. Lett. 93, 165002 (2004).
  4. Y. Nagashima, K. Hoshino, and K. Nagaoka, K. Shinohara, A. Fujisawa, K. Uehara, Y. Kusama, K. Ida, Y. Yoshimura, S. Okamura, K. Matsuoka, A. Ejiri, Y. Takase, K. Itoh, M. Yagi, S.-I. Itoh, JFT-2M group, and CHS group, Plasma Fusion Res. 1, 041 (2006), http://www.jspf.or.jp/PFR/
  5. G. S. Xu, B. N. Wan, M. Song, and J. Li, Phys. Rev. Lett. 91, 125001 (2003).
  6. M. Jakubowski, R. J. Fonck, and G. R. McKee, Phys. Rev. Lett. 89, 265003 (2002).
  7. D. K. Gupta, R. J. Fonck, G. R. McKee, D. J. Schlossberg, and M. W. Shafer, Phys. Rev. Lett. 97, 125002 (2006), http://prl.aps.org/
  8. G. D. Conway, C. Troester, B. Scott, K. Hallatschek, and the ASDEX Upgrade Team, Plasma Phys. Controlled Fusion 50, 055009 (2008).
  9. G. D. Conway, J. Schirmer, S. Klenge, W. Suttrop, E. Holzhauer, and the ASDEX Upgrade Team, Plasma Phys. Controlled Fusion 46, 951 (2004).
  10. P. Hennequin, C. Honoré, A. Truc, A. Quéméneur, C. Fenzi-Bonizec, C. Bourdelle, X. Garbet, G. T. Hoang, and the Tore Supra Team, Nucl. Fusion 46, S771 (2006).
  11. E. Z. Gusakov and A. V. Surkov, Plasma Phys. Controlled Fusion 46, 1143 (2004).
  12. E. Holzhauer and J. H. Massig, Plasma Phys. Controlled Fusion 20, 867 (1978).
  13. N. Windsor, J. L. Johnson, and J. M. Dawson, Phys. Fluids 11, 2448 (1968).
  14. G. R. McKee, R. J. Fonck, M. Jakubowski, K. H. Burrell, K. Hallatschek, R. A. Moyer, and D. L. Rudakov, Phys. Plasmas 10, 1712 (2003).

CITING ARTICLES
For access to citing articles, you need to log in.
For access to citing articles, you need to Log in.


Copyright © American Institute of Physics