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TY - CONF AU - Naselli, E. AU - Castro, G. AU - Celona, L. AU - Gammino, S. AU - Mascali, D. AU - Mazzaglia, M. AU - Sorbello, G. AU - Torrisi, G. ED - Schaa, Volker RW ED - Pisciotta, Pietro TI - The First Measurement of Plasma Density by Means of an Interfero-Polarimetric Setup in a Compact ECR-Plasma Trap J2 - Proc. of ECRIS2018, Catania, Italy, 10-14 September 2018 C1 - Catania, Italy T2 - International Workshop on ECR Ion Sources T3 - 23 LA - english AB - This paper presents the first measurement of plasma density by a K-band microwave polarimetric setup able to measure the magnetoplasma-induced Faraday rotation in a compact size plasma trap. The polarimeter, based on rotating waveguide OMTs (OrthoModeTransducers), has been proven to provide reliable measurements of the plasma density even in the unfavorable conditions 'p ' Lp ' Lc (being 'p, Lp and Lc the probing signal wavelength, the plasma dimension and the plasma chamber length respectively) that complicates the measurements due to multi-patterns caused by reflections of the probing wave on the metallic walls of the plasma chamber. An analysis method has been developed on purpose in order to discriminate the polarization plane rotation due to magnetoplasma Faraday rotation only, excluding the effects of the cavity resonator. The measured density is consistent with the previous plasma density interferometric estimations. The developed method is a powerful tool for probing plasmas in very compact magnetic traps such as Electron Cyclotron Resonance Ion Sources and for in-plasma '-radionuclides' decay studies. PB - JACoW Publishing CP - Geneva, Switzerland SP - 102 EP - 106 KW - plasma KW - polarization KW - cavity KW - electron KW - ECR DA - 2019/01 PY - 2019 SN - 978-3-95450-196-0 DO - 10.18429/JACoW-ECRIS2018-TUP11 UR - http://jacow.org/ecris2018/papers/tup11.pdf ER -