Polarizer design for millimeter-wave plasma diagnostics

Frank Leipold; Mirko Salewski; Asger Schou Jacobsen; Martin Jessen; Søren Bang Korsholm; Poul Michelsen; Stefan Kragh Nielsen; Morten Stejner Pedersen

doi:10.1063/1.4816724

Polarizer design for millimeter-wave plasma diagnostics

Frank Leipold, Mirko Salewski, Asger Schou Jacobsen, Martin Jessen, Søren Bang Korsholm, Poul Michelsen, Stefan Kragh Nielsen, Morten Stejner Pedersen

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Abstract

Radiation from magnetized plasmas is in general elliptically polarized. In order to convert the elliptical polarization to linear polarization, mirrors with grooved surfaces are currently employed in our collective Thomson scattering diagnostic at ASDEX Upgrade. If these mirrors can be substituted by birefringent windows, the microwave receivers can be designed to be more compact at lower cost. Sapphire windows (a-cut) as well as grooved high density polyethylene windows can serve this purpose. The sapphire window can be designed such that the calculated transmission of the wave energy is better than 99%, and that of the high density polyethylene can be better than 97%.

Original language	English
Journal	Review of Scientific Instruments
Volume	84
Issue number	8
Pages (from-to)	084701
ISSN	0034-6748
DOIs	https://doi.org/10.1063/1.4816724
Publication status	Published - 2013

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title = "Polarizer design for millimeter-wave plasma diagnostics",

abstract = "Radiation from magnetized plasmas is in general elliptically polarized. In order to convert the elliptical polarization to linear polarization, mirrors with grooved surfaces are currently employed in our collective Thomson scattering diagnostic at ASDEX Upgrade. If these mirrors can be substituted by birefringent windows, the microwave receivers can be designed to be more compact at lower cost. Sapphire windows (a-cut) as well as grooved high density polyethylene windows can serve this purpose. The sapphire window can be designed such that the calculated transmission of the wave energy is better than 99%, and that of the high density polyethylene can be better than 97%.",

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AU - Leipold, Frank

AU - Salewski, Mirko

AU - Jacobsen, Asger Schou

AU - Jessen, Martin

AU - Korsholm, Søren Bang

AU - Michelsen, Poul

AU - Nielsen, Stefan Kragh

AU - Stejner Pedersen, Morten

PY - 2013

Y1 - 2013

N2 - Radiation from magnetized plasmas is in general elliptically polarized. In order to convert the elliptical polarization to linear polarization, mirrors with grooved surfaces are currently employed in our collective Thomson scattering diagnostic at ASDEX Upgrade. If these mirrors can be substituted by birefringent windows, the microwave receivers can be designed to be more compact at lower cost. Sapphire windows (a-cut) as well as grooved high density polyethylene windows can serve this purpose. The sapphire window can be designed such that the calculated transmission of the wave energy is better than 99%, and that of the high density polyethylene can be better than 97%.

AB - Radiation from magnetized plasmas is in general elliptically polarized. In order to convert the elliptical polarization to linear polarization, mirrors with grooved surfaces are currently employed in our collective Thomson scattering diagnostic at ASDEX Upgrade. If these mirrors can be substituted by birefringent windows, the microwave receivers can be designed to be more compact at lower cost. Sapphire windows (a-cut) as well as grooved high density polyethylene windows can serve this purpose. The sapphire window can be designed such that the calculated transmission of the wave energy is better than 99%, and that of the high density polyethylene can be better than 97%.

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DO - 10.1063/1.4816724

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SP - 084701

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 8

ER -

Polarizer design for millimeter-wave plasma diagnostics

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