Collective microwave scattering diagnostic on the H-1 heliac

W. M. Solomon; M. G. Shats; D. Korneev; K. Nagasaki

doi:10.1063/1.1315635

Collective microwave scattering diagnostic on the H-1 heliac

W. M. Solomon^*, M. G. Shats, D. Korneev, K. Nagasaki

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

A multichannel microwave scattering diagnostic has been developed and installed on the H-1 heliac. The purpose of the new diagnostic is to study small-scale plasma fluctuations in H-1, which are believed to be responsible for the loss of particles and energy from the plasma. The diagnostic is a 132 GHz, four-channel superheterodyne system. The transmitter and receiver antennas (consisting of horns and focusing bispherical mirrors) are located inside the vacuum vessel of H-1. A radial resolution of Δr/a∼0.2 is achieved. The scattering volume is positioned in the density gradient region at r/a∼0.6. At present, the system is aligned to measure fluctuations in the poloidal wave number range from approximately 10 to 25 cm^-1. The use of the heterodyne detection system allows the fluctuation propagation direction to be determined. The low frequency bandwidth of the system is 1 MHz. The instrument sensitivity is about P_s/P_i∼10^-6.

Original language	English
Pages (from-to)	352-354
Number of pages	3
Journal	Review of Scientific Instruments
Volume	72
Issue number	1 II
DOIs	https://doi.org/10.1063/1.1315635
Publication status	Published - Jan 2001

Access to Document

10.1063/1.1315635

Cite this

@article{aa169ad9ffc34b5aa7a508a6b7718e99,

title = "Collective microwave scattering diagnostic on the H-1 heliac",

abstract = "A multichannel microwave scattering diagnostic has been developed and installed on the H-1 heliac. The purpose of the new diagnostic is to study small-scale plasma fluctuations in H-1, which are believed to be responsible for the loss of particles and energy from the plasma. The diagnostic is a 132 GHz, four-channel superheterodyne system. The transmitter and receiver antennas (consisting of horns and focusing bispherical mirrors) are located inside the vacuum vessel of H-1. A radial resolution of Δr/a∼0.2 is achieved. The scattering volume is positioned in the density gradient region at r/a∼0.6. At present, the system is aligned to measure fluctuations in the poloidal wave number range from approximately 10 to 25 cm-1. The use of the heterodyne detection system allows the fluctuation propagation direction to be determined. The low frequency bandwidth of the system is 1 MHz. The instrument sensitivity is about Ps/Pi∼10-6.",

author = "Solomon, {W. M.} and Shats, {M. G.} and D. Korneev and K. Nagasaki",

year = "2001",

month = jan,

doi = "10.1063/1.1315635",

language = "English",

volume = "72",

pages = "352--354",

journal = "Review of Scientific Instruments",

issn = "0034-6748",

publisher = "American Institute of Physics",

number = "1 II",

}

TY - JOUR

T1 - Collective microwave scattering diagnostic on the H-1 heliac

AU - Solomon, W. M.

AU - Shats, M. G.

AU - Korneev, D.

AU - Nagasaki, K.

PY - 2001/1

Y1 - 2001/1

N2 - A multichannel microwave scattering diagnostic has been developed and installed on the H-1 heliac. The purpose of the new diagnostic is to study small-scale plasma fluctuations in H-1, which are believed to be responsible for the loss of particles and energy from the plasma. The diagnostic is a 132 GHz, four-channel superheterodyne system. The transmitter and receiver antennas (consisting of horns and focusing bispherical mirrors) are located inside the vacuum vessel of H-1. A radial resolution of Δr/a∼0.2 is achieved. The scattering volume is positioned in the density gradient region at r/a∼0.6. At present, the system is aligned to measure fluctuations in the poloidal wave number range from approximately 10 to 25 cm-1. The use of the heterodyne detection system allows the fluctuation propagation direction to be determined. The low frequency bandwidth of the system is 1 MHz. The instrument sensitivity is about Ps/Pi∼10-6.

AB - A multichannel microwave scattering diagnostic has been developed and installed on the H-1 heliac. The purpose of the new diagnostic is to study small-scale plasma fluctuations in H-1, which are believed to be responsible for the loss of particles and energy from the plasma. The diagnostic is a 132 GHz, four-channel superheterodyne system. The transmitter and receiver antennas (consisting of horns and focusing bispherical mirrors) are located inside the vacuum vessel of H-1. A radial resolution of Δr/a∼0.2 is achieved. The scattering volume is positioned in the density gradient region at r/a∼0.6. At present, the system is aligned to measure fluctuations in the poloidal wave number range from approximately 10 to 25 cm-1. The use of the heterodyne detection system allows the fluctuation propagation direction to be determined. The low frequency bandwidth of the system is 1 MHz. The instrument sensitivity is about Ps/Pi∼10-6.

UR - http://www.scopus.com/inward/record.url?scp=5244238977&partnerID=8YFLogxK

U2 - 10.1063/1.1315635

DO - 10.1063/1.1315635

M3 - Article

SN - 0034-6748

VL - 72

SP - 352

EP - 354

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 1 II

ER -

Collective microwave scattering diagnostic on the H-1 heliac

Abstract

Access to Document

Other files and links

Fingerprint

Cite this