NDLI: Low- and high-power measurements on a remote steering upper port launcher mockup for ITER

Content Provider	IEEE Xplore Digital Library
Author	Bongers, W.A. Graswinckel, M.F. Fernandez, A. Bruschi, A. Elzendoorn, B.S.Q. Heidinger, R. Schwoerer, K. Kruyt, O.G. Lamers, B. Lammerts, R. Piosczyk, B. Ronden, D.M.S. Rugebregt, M.R. Verhoeven, A.G.A.
Copyright Year	2005
Description	Author affiliation: FOM Inst. for Plasma Phys. "Rijnhuizen", Assoc. EURATOM-FOM, Netherlands (Bongers, W.A.; Graswinckel, M.F.)
Abstract	The Euratom association FOM-Rijnhuizen is developing a plug-in 170 GHz ECW launcher system for use in the upper-ports of ITER, based on the remote steering (RS) principle, designed to stabilise the neoclassical tearing modes (NTM) at the q=3/2 and q=2/1 surfaces by inducing off-axis current drive. The launching system enables up to eight mm-wave beams per port plug to be directed from the feeding waveguides through corrugated square waveguides (/spl ap/ 44/spl times/44 mm/sup 2/) inside the port plug to the plasma. A mock-up system has been manufactured, capable of vacuum & high-power short-pulse operation. The transmission line consists of a taper, to launch an HE/sub 11/ mode in 63.5 mm circular corrugated waveguide. (The taper will be replaced by a gyrotron source in high power testing). The circular waveguide is used as input for the steering mechanism, housed in a vacuum vessel, which directs the beam under an angle between -12/spl deg/ and 12/spl deg/ through the CVD diamond window into the copper square corrugated waveguide. Antenna patterns from the exit aperture of the square waveguide are scanned using a 3-axis scanner. Low-power measurements (Takahashi et al., 2003) are a preparatory phase for high-power tests, currently prepared in FZK. In the low-power measurements, waveguide performance will be inferred from antenna pattern measurements. Of interest are slight differences in beam parameters (angle, waist etc.) relative to the input beam.
Starting Page	425
Ending Page	426
File Size	2162947
Page Count	2
File Format	PDF
ISBN	0780393481
DOI	10.1109/ICIMW.2005.1572594
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-09-19
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Antenna measurements Plugs Testing Corrugated surfaces Particle beams Plasma materials processing Plasma sources Plasma waves Manufacturing Vacuum systems
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in