Correlation between fluctuating electron temperature and fluctuating space-potential challenges the probe determination of turbulent electric field spectrum

Yuan, Chengxun (avtor), Zhou, Chen (avtor), Demidov, Mikhail V. (avtor), Gyergyek, Tomaž (avtor), Kovačič, Jernej (avtor), Koepke, Mark E. (avtor), Kurlyandskaya, Iya P. (avtor), Demidov, Vladimir I. (avtor), Costea, Stefan (avtor), Zhou, Zhongxiang (avtor)

The measurement of plasma potential and electric field by the traditional Langmuir probe method can contain a significant qualitative error due to a spurious effect from temperature fluctuations that appear in the temperature-potential cross phase. This error is separate from any systematic error in the floating potential amplitude due to cross-correlated temperature and potential fluctuations not averaging out. Conditions under which electron temperature fluctuations significantly and insignificantly affect the measurement of electric field fluctuations in plasma are considered for both effects. Actual measurements illustrate the obtained conclusions are presented. Correct direct measurement of plasma’s space potential fluctuations requires that the amplitude of electron temperature fluctuations (in eV) be at least ten times smaller than the space potential fluctuation amplitude (in volts).

• Jezik: Angleški jezik
• Ključne besede: electric probe, electron temperature oscillations, emissive probes, magnetized plasma, plasma potential oscillations
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo ; FE - Fakulteta za elektrotehniko
• Status publikacije: Objavljeno
• Različica publikacije: Recenzirani rokopis
• Datum objave: 04.12.2023
• Leto izida: 2024
• Št. strani: Str. 1162-1167
• Številčenje: Vol. 52, no. 4
• PID: 20.500.12556/RUL-165204
• UDK: 537.27
• ISSN pri članku: 0093-3813
• DOI: 10.1109/TPS.2023.3337008
• COBISS.SI-ID: 176472323
• Datum objave v RUL: 27.11.2024

Gradivo je del revije

• Naslov: IEEE transactions on plasma science
• Skrajšan naslov: IEEE trans. plasma sci.
• Založnik: Institute of Electrical and Electronics Engineers
• ISSN: 0093-3813
• COBISS.SI-ID: 8828933

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: električne sonde, oscilacije elektronske temperature, emisijske sonde, magnetizirana plazma, oscilacije plazemskega potenciala