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Statements

Subject Item
n2:RIV%2F61389021%3A_____%2F13%3A00423275%21RIV14-AV0-61389021
rdf:type
skos:Concept n17:Vysledek
dcterms:description
The paper presents the results of upgrading and description a two wavelength 'unambiguous' microwave interferometer for line integrated electron density measurements at the 'COMPASS' tokamak.The probing signals in the frequency range of 131 and 133 GHz are generated by IMPATT diode oscillators.Double conversion heterodyne receivers are used for detection.Use of each oscillator is twofold:as a source for the probing signals and as a local oscillator for heterodyne detection.The plasma is probed with two separate waves of different wavelengths traveling along identical paths to meet each other.Each probing beam experiences a different phase shift φ1 and φ2 and the 'unambiguous' interferometer determines the difference φ1-φ2.The phase measurement is realized by using the 3 pieces of phase detectors based on pairs of phase/gain evaluation boards (AD8302). Application of the phase detectors provides information on the average plasma concentration in real time and restore the values of The paper presents the results of upgrading and description a two wavelength 'unambiguous' microwave interferometer for line integrated electron density measurements at the 'COMPASS' tokamak.The probing signals in the frequency range of 131 and 133 GHz are generated by IMPATT diode oscillators.Double conversion heterodyne receivers are used for detection.Use of each oscillator is twofold:as a source for the probing signals and as a local oscillator for heterodyne detection.The plasma is probed with two separate waves of different wavelengths traveling along identical paths to meet each other.Each probing beam experiences a different phase shift φ1 and φ2 and the 'unambiguous' interferometer determines the difference φ1-φ2.The phase measurement is realized by using the 3 pieces of phase detectors based on pairs of phase/gain evaluation boards (AD8302). Application of the phase detectors provides information on the average plasma concentration in real time and restore the values of
dcterms:title
Two-wavelength millimeter wave “unambiguous heterodyne interferometer Two-wavelength millimeter wave “unambiguous heterodyne interferometer
skos:prefLabel
Two-wavelength millimeter wave “unambiguous heterodyne interferometer Two-wavelength millimeter wave “unambiguous heterodyne interferometer
skos:notation
RIV/61389021:_____/13:00423275!RIV14-AV0-61389021
n17:predkladatel
n21:ico%3A61389021
n3:aktivita
n16:I
n3:aktivity
I
n3:dodaniDat
n4:2014
n3:domaciTvurceVysledku
Varavin, Mykyta n12:2083248 n12:5444225
n3:druhVysledku
n8:D
n3:duvernostUdaju
n18:S
n3:entitaPredkladatele
n13:predkladatel
n3:idSjednocenehoVysledku
112203
n3:idVysledku
RIV/61389021:_____/13:00423275
n3:jazykVysledku
n11:eng
n3:klicovaSlova
Detectors; Frequency measurement; Phase measurement; Plasma density; Plasma measurements; Tokamaks
n3:klicoveSlovo
n7:Plasma%20density n7:Plasma%20measurements n7:Frequency%20measurement n7:Tokamaks n7:Detectors n7:Phase%20measurement
n3:kontrolniKodProRIV
[3C3EC618CC27]
n3:mistoKonaniAkce
Kharkov
n3:mistoVydani
Kharkov
n3:nazevZdroje
Proceedings - 2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves, MSMW 2013
n3:obor
n6:BL
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
9
n3:rokUplatneniVysledku
n4:2013
n3:tvurceVysledku
Varavin, Mykyta Shevchenko, V. Fateev, A. S. Žáček, František Stumbra, M. Zajac, Jaromír Ermak, G. P. Varavin, A. V. Vasilev, A. S.
n3:typAkce
n15:WRD
n3:zahajeniAkce
2013-06-23+02:00
s:numberOfPages
3
n14:doi
10.1109/MSMW.2013.6622129
n9:hasPublisher
IEEE
n10:isbn
978-1-4799-1066-3