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Full-Text Articles in Physical Sciences and Mathematics
The Effects Of Neutral Gas Heating On H Mode Transition And Maintenance Currents In A 13.56 Mhz Planar Coil Inductively Coupled Plasma Reactor, Chin Oi Hoong
Chin Oi Hoong
The H mode transition and maintenance currents in a 13.56 MHz laboratory 6 turn planar coil inductively coupled plasma (ICP) reactor are simulated for low pressure argon discharge range of 0.02-0.3 mbar with neutral gas heating and at ambient temperature. An experimentally fitted 3D power evolution plot for 0.02 mbar argon pressure is also shown to visualize the effects of hysteresis in the system. Comparisons between simulation and experimental measurements show good agreement in the pressure range of 0.02-0.3 mbar for transition currents and 0.02-0.1 mbar for maintenance currents only when neutral gas heating is considered. This suggests that neutral …
A Simple Monochromatic Spark Discharge Light-Source, Chin Oi Hoong
A Simple Monochromatic Spark Discharge Light-Source, Chin Oi Hoong
Chin Oi Hoong
Spark light illumination has been used in high-speed photog-raphy since the beginning ofthe century and various designs ofthe spark discharge light source have since been reportedr with spark duration ranging from nanoseconds to millisec-onds. We report here a simple and easy to build spark dis-charge tube for operation as a monochromatic point light source. The design and construction ofthe spark discharge tube is shown in Fig. 1. The sharp-tip solid cone anode is made of stainless steel which is screwed onto a brass rod connected A compact spark discharge tube operated as a monochromatic light source at 587.5 nm is …
Measurements Of Electron Energy Distribution In An Argon Positive Column, Chin Oi Hoong
Measurements Of Electron Energy Distribution In An Argon Positive Column, Chin Oi Hoong
Chin Oi Hoong
The argon positive column plasma of a cold cathode glow discharge is studied using a pulsed single Langmuir Probe technique. It is observed thatthe energy distribution of the electrons in the posotive column is non-maxwellian at a gas pressure of 0.5 mbar. An increase in the gas pressure seems to make the distribution more Maxwellian.