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  • 1
    Electronic Resource
    Electronic Resource
    A heterodyne interferometric polarimeter with 28μm H2O laser for Faraday rotation measurement (1984)
    Springer
    International journal of infrared and millimeter waves 5 (1984), S. 1039-1052 
    Details
    ISSN: 1572-9559
    Keywords: H2O laser ; Faraday rotation ; polarimetry ; far-infrared ; plasma diagnostics ; compact toroid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A fast response frequency-modulated interferometric polarimeter was designed and constructed with a single 28 μm H2O laser for high density plasma diagnostics. This newly developed modulation system employs an electro-magnetically driven movable mirror to achieve the modulation frequency beyound 1 MHz for about 100 μs duration. The movable mirror performance is studied experimentally in detail. The determination of the Faraday rotation angle is based on the zero-crossing method for the observed beat signals produced by two kinds of rotating plane-polarized waves. The feasibility of the polarimeter constructed was verified in experiments of a field-reversed thetapinch plasma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01009592
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A CW 28 μm water vapor laser for plasma diagnostics (1981)
    Springer
    International journal of infrared and millimeter waves 2 (1981), S. 1199-1208 
    Details
    ISSN: 1572-9559
    Keywords: water vapor laser ; plasma diagnostics ; interferometer ; waveguide laser ; far-infrared
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A high-power CW 27.972 μm water vapor laser has been constructed in order to use as a light source of an interferometer for plasma diagnostics. The laser consists of 220 cm length and 2.0 cm small bore Pyrex glass discharge tube, semi-confocal resonator and Michelson coupler. From the measurement of cavity detuning curves, it is found that two waveguide modes, EH11 and EH21 oscillate. The increase of the output power is found to become more than seven times larger by adding He(50%)−H2(50%) mixed gas. Under the optimum condition, the maximum output power of 65 mW or the output power per unit cavity volume of 83 μW/cm3 is obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01007084
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    A 28 μm water-vapor laser interferometer for plasma diagnostics (1983)
    Springer
    International journal of infrared and millimeter waves 4 (1983), S. 549-559 
    Details
    ISSN: 1572-9559
    Keywords: interferometer ; polarimeter ; water-vapor laser ; far-infrared ; plasma diagnostics ; compact toroid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A high-power CW 27.972 μm water-vapor laser has been developed for interferometric and polarimetric measurements of plasmas. The maximum output power and the power density in the cavity of the laser with 2.0 cm bore and 220 cm length reach 85 mW and 109 μW/cm3, respectively. An interferometer using this laser is constructed and its performance is examined as a study on polarimetric method of magnetic field measurement. Preliminary interferometric experiments are also carried out on a compact toroidal plasma with field-reversal configuration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01009394
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    Paper (German National Licenses)
    Fulltext
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