Performance of a thermal nonequilibrium plasma jet control system

Hideya Nishiyama, Takehiko Sato, Daigo Kato

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


The correlations between characteristics of a plasma jet such as gas temperature, radiation intensity, electron temperature and electron density and operating conditions such as discharge current, applied magnetic flux density, gas flow rate and rate of gas mixing with secondary gas are experimentally clarified in details. There is a linear interrelation between radiation intensity and two operating parameters of discharge current and magnetic flux density. It is shown that the radiation intensity is selected as an adjustable controlled variable, and also the discharge current and magnetic flux density are selected as manipulated variables. Then, a proportional plus integral plus derivative (PID) feedback control system is constructed utilizing the obtained physical correlations, and further the control system performance is verified. The radiation intensity can be controlled over a wide range by the discharge current in this system, and it can be also controlled with rapid and precise response when applying a magnetic field.

Original languageEnglish
Pages (from-to)157-168
Number of pages12
JournalPlasma Devices and Operations
Issue number3
Publication statusPublished - 2002


  • Control systems
  • Fluctuation
  • Operation
  • Plasma jet
  • Plasma parameters
  • Thermofluid characteristics

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Condensed Matter Physics


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