RSI Nameplate
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

Flickr Twitter iResearch App Facebook

BROWSE VOLUMES

Year Range: 
Search Issue | RSS Feeds RSS
Previous Issue Next Issue

Sep 2009

Volume 80, Issue 9, Articles (09xxxx)

Return to All Sections
back to top
RSS Feeds

Antenna design for fast ion collective Thomson scattering diagnostic for the international thermonuclear experimental reactor

F. Leipold, V. Furtula, M. Salewski, H. Bindslev, S. B. Korsholm, F. Meo, P. K. Michelsen, D. Moseev, S. K. Nielsen, and M. Stejner

Rev. Sci. Instrum. 80, 093501 (2009); http://dx.doi.org/10.1063/1.3212567 (5 pages) | Cited 6 times

Online Publication Date: 11 September 2009

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Fast ion physics will play an important role for the international thermonuclear experimental reactor (ITER), where confined alpha particles will affect and be affected by plasma dynamics and thereby have impacts on the overall confinement. A fast ion collective Thomson scattering (CTS) diagnostic using gyrotrons operated at 60 GHz will meet the requirements for spatially and temporally resolved measurements of the velocity distributions of confined fast alphas in ITER by evaluating the scattered radiation (CTS signal). While a receiver antenna on the low field side of the tokamak, resolving near perpendicular (to the magnetic field) velocity components, has been enabled, an additional antenna on the high field side (HFS) would enable measurements of near parallel (to the magnetic field) velocity components. A compact design solution for the proposed mirror system on the HFS is presented. The HFS CTS antenna is located behind the blankets and views the plasma through the gap between two blanket modules. The viewing gap has been modified to dimensions 30×500 mm2 to optimize the CTS signal. A 1:1 mock-up of the HFS mirror system was built. Measurements of the beam characteristics for millimeter-waves at 60 GHz used in the mock-up agree well with the modeling.
Show PACS
52.70.Gw Radio-frequency and microwave measurements
28.52.Av Theory, design, and computerized simulation
28.52.Fa Materials
52.55.Fa Tokamaks, spherical tokamaks

Advancements in electron cyclotron emission imaging demonstrated by the TEXTOR ECEI diagnostic upgrade

B. Tobias, X. Kong, T. Liang, A. Spear, C. W. Domier, N. C. Luhmann, Jr., I. G. J. Classen, J. E. Boom, M. J. van de Pol, R. Jaspers, A. J. H. Donné, H. K. Park, and T. Munsat

Rev. Sci. Instrum. 80, 093502 (2009); http://dx.doi.org/10.1063/1.3233913 (8 pages) | Cited 11 times

Online Publication Date: 24 September 2009

Full Text: Read Online (HTML) | Download PDF

Show Abstract
A new TEXTOR electron cyclotron emission imaging system has been developed and employed, providing a diagnostic with new features and enhanced capabilities when compared to the legacy system it replaces. Optical coupling to the plasma has been completely redesigned, making use of new minilens arrays for reduced optical aberration and providing the new feature of vertical zoom, whereby the vertical coverage is now remotely adjustable on a shot-by-shot basis from 20–35 cm. Other innovations, such as the implementation of stacked quasioptical planar notch filters, allow for the diagnostic to be operated without interruption or degradation in performance during electron cyclotron resonance heating. Successful commissioning of the new diagnostic and a demonstration of the improved capabilities are presented in this paper, along with a discussion of the new technologies employed.
Show PACS
79.70.+q Field emission, ionization, evaporation, and desorption
42.79.Gn Optical waveguides and couplers
29.20.dg Cyclotrons
Return to All Sections
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close