Millimeter-wave reflectometry for electron density profile and fluctuation measurements on NSTX

被引：20

作者：

Kubota, S ^{[1
]}

Nguyen, XV

Peebles, WA

Zeng, L

Doyle, EJ

Roquemore, AL

机构：

[1] Univ Calif Los Angeles, Inst Plasma & Fus Res, Los Angeles, CA 90095 USA

[2] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2001年 / 72卷 / 01期

关键词：

D O I：

10.1063/1.1329657

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A millimeter-wave reflectometry system for electron density profile and fluctuation measurements is being developed and installed on the National Spherical Torus Experiment. The initial frequency coverage will be in the bands 12-18, 20-32, and 33-50 GHz, provided by frequency-tunable solid-state sources. These frequencies correspond to O-mode cutoff densities ranging from 1.8 x 10(12) to 3.1 x 10(13) cm(-3), which will span both the plasma core (rho = r/a < 0.8) and edge (rho >0.8) regions. Operated as a broadband swept-frequency (frequency-modulated continuous-wave) reflectometer, the diagnostic is expected to provide routine (shot-to-shot) time- (less than or equal to 50 mus) and spatially resolved (similar to1 cm) density profiles. The previous hardware can be easily reconfigured as a fixed-frequency reflectometer for density fluctuation measurements. The combination of measurements would be valuable for studying phenomena such as possible L- to H-mode transitions and edge-localized modes. (C) 2001 American Institute of Physics.

引用

页码：348 / 351

页数：4

共 16 条

[1] The Mega Amp Spherical Tokamak [J].

Cox, M .

FUSION ENGINEERING AND DESIGN, 1999, 46 (2-4) :397-404

[2] Core reflectometer density profile measurements on DIII-D [J].

Doyle, EJ ;

Rhodes, TL ;

Peebles, WA ;

Zeng, L .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1999, 70 (01) :1064-1067

[3]

DOYLE EJ, 1998, DIAGNOSTICS EXPT THE, V2, P119

[4]

DOYLE EJ, 1990, REV SCI INSTRUM, V61, P2986

[5] Development of a local internal magnetic field measurement via dual mode (O-X) correlation reflectometry [J].

Gilmore, M ;

Peebles, WA ;

Nguyen, XV .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1999, 70 (01) :1085-1088

[6] Achievement of record β in the START spherical tokamak [J].

Gryaznevich, M ;

Akers, R ;

Carolan, PG ;

Conway, NJ ;

Gates, D ;

Field, AR ;

Hender, TC ;

Jenkins, I ;

Martin, R ;

Nightingale, MPS ;

Ribeiro, C ;

Robinson, DC ;

Sykes, A ;

Tournianski, M ;

Valovic, M ;

Walsh, MJ .

PHYSICAL REVIEW LETTERS, 1998, 80 (18) :3972-3975

[7]

Heald M.A., 1964, PLASMA PHYS, V6, P617

[8] Multipulse Thomson scattering system for the National Spherical Torus Experiment [J].

Johnson, D ;

Bretz, N ;

LeBlanc, B ;

Palladino, R ;

Long, D ;

Parsells, R .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1999, 70 (01) :776-779

[9] Physics design of the National Spherical Torus Experiment [J].

Kaye, SM ;

Ono, M ;

Peng, YKM ;

Batchelor, DB ;

Carter, MD ;

Choe, WH ;

Goldston, R ;

Hwang, YS ;

Jaeger, EF ;

Jarboe, TR ;

Jardin, S ;

Johnson, D ;

Kaita, R ;

Kessel, C ;

Kugel, H ;

Maingi, R ;

Majeski, R ;

Manickam, J ;

Menard, J ;

Mikkelsen, DR ;

Orvis, DJ ;

Nelson, BA ;

Paoletti, F ;

Pomphrey, N ;

Rewoldt, G ;

Sabbagh, S ;

Strickler, DJ ;

Synakowski, E .

FUSION TECHNOLOGY, 1999, 36 (01) :16-37

[10] Development of a fast solid-state high-resolution density profile reflectometer system on the DIII-D tokamak [J].

Kim, KW ;

Doyle, EJ ;

Rhodes, TL ;

Peebles, WA ;

Rettig, CL ;

Luhmann, NC .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1997, 68 (01) :466-469

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