Far-infrared laser scattering in the ACT-I toroidal device | Zendy

J. Goree | Zendy; D. K. Mansfield | Zendy; M. Ono | Zendy; K. L. Wong | Zendy

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Far-infrared laser scattering in the ACT-I toroidal device

Author(s) -

J. Goree,

D. K. Mansfield,

M. Ono,

K. L. Wong

Publication year - 1985

Publication title -

journal of vacuum science and technology a vacuum surfaces and films

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.583

H-Index - 112

eISSN - 1520-8559

pISSN - 0734-2101

DOI - 10.1116/1.573120

Subject(s) - optics , laser , scattering , materials science , toroid , thomson scattering , infrared , beam splitter , detector , tokamak , optoelectronics , physics , plasma , nuclear physics

A far‐infrared laser scattering diagnostic has been built for the ACT‐I toroidal device. The optical system uses a passively stabilized 447‐μm CH3I laser. A polyethylene etalon is the beam splitter. The vacuum windows are plastic (TPX), which we found has the vacuum property Q 6.5×10−9 Torr l/s/cm2. Using paraboloidal and ellipsoidal mirrors for detection optics improves the signal strength and allows a better rf enclosure design for the detector. The diagnostic was tested by scattering from an ion Bernstein wave, a technique which can be used for ion temperature diagnostics.

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