Polarizer design for millimeter-wave plasma diagnostics

Journal Article · Thu Aug 15 00:00:00 EDT 2013 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4816724· OSTI ID:22220473

Leipold, F.; Salewski, M.; Jacobsen, A. S.; Jessen, M.; Korsholm, S. B.; Michelsen, P. K.; Nielsen, S. K.; Stejner, M. ^[1]

---

1. Department of Physics, Technical University of Denmark, DK-4000 Roskilde (Denmark)

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%.

• OSTI ID: 22220473
• Journal Information: Review of Scientific Instruments, Vol. 84, Issue 8; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ASDEX TOKAMAK
DESIGN
MICROWAVE RADIATION
MIRRORS
PLASMA DIAGNOSTICS
PLASMA WAVES
POLARIZATION
POLYETHYLENES
SAPPHIRE
THOMSON SCATTERING