A helicon discharge is an excitation of plasma by helicon waves induced through radio frequency heating the difference between a helicon plasma source and an inductively coupled plasma (icp) is the presence of a magnetic field directed along the axis of the antenna. The antenna immersed in plasma is excited with a sinusoidal/pulse stimulus and the output from the non-inverting conﬁguration is fed into the diﬀerence ampliﬁer. To prove that a plasma column has been characterized as an antenna the dimension of the antenna in this project is length of the plasma column l= 150mm, the radius of plasma column r = 52mm and the ground for this antenna using an aluminum the. An investigation on plasma antennas a thesis submitted to of middle east technical university by recep firat t i̇ğ rek in partial fulfillment of the requirements for the degree of master of science in electrical and electronics engineering august 2005. This paper presents a design and simulation of a reconfigurable array of plasma antenna the plasma column is used as radiating elements instead of metal to create an antenna the advantages of the plasma antenna over the conventional antenna are its possible to change the operating parameters, such.
Thesis title: modeling and measuring the characteristics of an inductively coupled plasma antenna for a micro-propulsion system date of final oral examination: 14 march 2012 the following individuals read and discussed the thesis submitted by student sonya mary. The plasma antenna is an emerging technology that partially or fully utilizes ionized gas as the conducting medium instead of metal to create an antenna. The code can be used to determine the effects of the plasma sheath on the near field characteristics of electric dipole antennas more detailed description of the aip code can be found in timothy chevalier's phd thesis ( chevalier , 2007 . This thesis proposes the design of a space based tethered antenna satellite system for elf/vlf communications with submarines in the far northern latitudes, and under the polar ice.
Plasma antenna can be streed electronically as soon as the heat source is shut off plasma can only exist while the gas is kept very hot but the signal emitted or received by the antenna disappears only when the plasma cools down when they are deenergized they revert to non conducting element and do not reflect radio probing signals the. Thesis  is written on the diagnostics and modelling of an inductively coupled rf discharge in hydrogen the presentation  explains a different type of ion sources and the capacitive and inductively coupled rf plasma. Master’s thesis proposal by cheong chan advisor: prof mitchell walker experimental investigation fast plasma production for the vaiper antenna.
Plasma antennas refer to a wide variety of antenna concepts that incorporate some use of an ionized medium this study summarizes the basic theory behind the operation of plasma antennas based on a survey of patents and. A helical antenna is an antenna consisting of one or more conducting wires (monofilar, bifilar, or quadrifilar with 1, 2, or 4 wires respectively) wound in the form of a helix in most cases, directional helical antennas are mounted over a ground plane, while omnidirectional designs may not be. Study and design of reconfigurable antennas using plasma medium mohd taufik jusoh tajudin to cite this version: mohd taufik jusoh tajudin study and design of reconfigurable antennas using plasma medium olivier pascal for accepting my thesis worknot to forget for the others juries,prof. Plasma antenna thesis an investigation on plasma antennas a thesisantenna systems with the advancing communication technology and increasing demand on wider frequency bands in this thesis the plasma antennas are reconfigurable microwave semiconductor plasma.
Chapter 5 helical and phased antennas plasma production using a helical antenna launching an mode was reported thus if a plasma on only one side of the antenna is sufﬁcientthe helical results presented earlier in this thesis using a single double saddle coil antenna and. Ms thesis defense by cheong chan (advisor: prof mitchell lr walker) “experimental investigation fast plasma production for the vaiper antenna” tuesday december 5, 2017 @ 9:30 amweber space science and technology building, room 200a. In this thesis, a model of a new plasma impedance probe (pip) architecture, which utilizes a custom-built adc along with other analog and digital components, is proposed the model can be fully integrated to produce a low-power, miniaturized impedance probe. Abstract in this paper, a broadband circularly polarized plasma curl antenna for portable rfid reader at 245 ghz is proposed the antenna consists of a glass tube filled with argon gas and of about 14 wavelengths curled into one turn. Etheseswhiteroseacuk.
Finally, a plasma-compatible rogowski current probe was developed and used to observe, for the first time, rf particle current in a tokamak plasma the diagnostic permitted investigation of the spatial form of the rf current driven in the edge plasma by the electric field antennas. Interaction of very low frequency (vlf) and extremely low frequency (elf) waves in the ionospheric plasma and parametric antenna concept electronic thesis or dissertation wright state university, 2017. Propulsion mechanisms in a helicon plasma thruster by nareg sinenian bs physics (2005) university of california, san diego submitted to the department of nuclear science and engineering.
In this thesis, a model of a new plasma impedance probe (pip) architecture, which utilizes [5,6] utilizes a transmission line that connects the dipole antenna to a crystal frequency oscillator the sweeping impedance probe (sip) [7,8] uses a phase detection scheme to measure the magnitude, phase, and impedance of a probe by sweeping. Antenna in a hot uniaxial plasma thesis by nagendra singh in partial fulfillment of the requirements for the degree of antenna in a hot uniaxial plasma are studied the uniaxial plasma is an approximation for large magnetic field b -o and small operating and.
Concerning plasma antenna efficiency on transmission and reception, the plasma antennas appear to work just as well as metal antennas as long as two criteria are met: (a) the plasma density is sufficiently high, ie, the plasma frequency should be considerably above the radio frequency being used and (b) the coupling to the plasma is. Chronological 1982 (1) jain, k k/ studies on interaction of a rotating relativistic electron beam with plasma 1984 (1) sekar, an/non-linear processes in plasma 1986 (1) krishnamurthi, usha/kinetic stability of the bennett equilibrium 1987 (1) kar, chitra/study of some nonlinear interactions of kinetic alfven waves: a thesis. This thesis focuses on the analysis and comparison of performance of two icrf antennas that are currently installed on the aug tokamak with the topica (torino polytechnic ion cyclotron antenna) program, for various operational scenarios. The radiation characteristic of plasma antenna is investigated by using the finite-difference time-domain (fdtd) approach in this paper through using fdtd method, we study the propagation of electromagnetic wave in free space in stretched coordinate.