Examination anxiety effect on some parameters of physiological and biochemical for student of Second class Department of Pathological Analysis AL-Dour technical Institute.

Abstract

Designed a home-made dc magnetron plasma discharge system Townsend electrical by cathode potential of 100-700 V and discharge gas pressure of (0.055-1.5) mbar has been investigated. In this paper studies voltage the breakdown of argon at different inter-electrode distance and longitudinal magnetic field in DC electrical discharge. The longitudinal magnetic field generated by pair of permanent magnets, which produces a high flux density (B = 640 Gauss) at the electrode surface and intre-electrode distance was (2, 4, 6, 8) cm. The results showed a decreases breakdown voltage when inter-electrode distance decreases and the breakdown voltage decreases by applying the magnetic field.