Plasma bolometry using a multislit shutter with piezoelectric actuator

Autor:	Andrew A. Outkine, P. G. Gabdullin, B.V. Kuteev, Artem Yu. Kostrioukov, V. G. Kapralov
Rok vydání:	2004
Předmět:	Materials science business.industry Amplifier Bolometer Piezoelectricity law.invention Optics law Modulation Shutter Plasma diagnostics business Actuator Instrumentation Frequency modulation
Zdroj:	Review of Scientific Instruments. 75:4287-4288
ISSN:	1089-7623 0034-6748
DOI:	10.1063/1.1789617
Popis:	We offer to apply a shutter with a piezoelectric bimorph actuator as a modulator of radiation and particle fluxes. Such shutters may be useful to provide measurements in steady state regimes of tokamaks and stellarators because they allow one to avoid amplifier drifts and to simplify diagnostics calibration. Signal modulation makes it possible to apply the lock-in amplification technique, increasing the sensitivity and reducing the neutron doze collected by sensors. Experiments with pyroelectric sensors (LiTaO3) at 350 Hz modulation frequency have demonstrated the detection limit at 30 Hz equal to 15 μW/cm2, which is comparable to metallic bolometers.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5b86a83401f0af1f52567340b0243099 https://doi.org/10.1063/1.1789617 Zobrazit plný text záznamu