Design and construction of a microwave plasma ion source

Download
2011
Çınar, Kamil
This thesis is about the designing and constructing a microwave ion source. The ions are generated in a thermal and dense hydrogen plasma by microwave induction. The plasma is generated by using a microwave source with a frequency of 2.45 GHz and a power of 700 W. The generated microwave is pulsing with a frequency of 50 Hz. The designed and constructed microwave system generates hydrogen plasma in a pyrex plasma chamber. Moreover, an ion extraction unit is designed and constructed in order to extract the ions from the generated hydrogen plasma. The ion beam extraction is achieved and ion currents are measured. Th e plasma parameters are determined by a double Langmuir probe and the ion current is measured by a Faraday cup. The designed ion extraction unit is simulated by using the dimensions of the designed and constructed ion extraction unit in order to trace out the trajectories of the extracted ions.

Suggestions

Applications of ions produced by low intensity repetitive laser pulses for implantation into semiconductor materials
Wolowski, J.; Badziak, J.; Czarnecka, A.; Parys, P.; Pisarek, M.; Rosinski, M.; Turan, Raşit; Yerci, Selçuk (2008-01-01)
This work reports experiment concerning specific applications of implantation of laser-produced ions for production of semiconductor nanocrystals. The investigation was carried out in the IPPLM within the EC STREP 'SEMINANO' project. A repetitive pulse laser system of parameters: energy up to 0.8 J in a 3.5 ns-pulse, wavelength of 1.06 mu m, repetition rate of up to 10 Hz, has been employed in these investigations. The characterisation of laser-produced ions was performed with the use of 'time-of-flight' io...
Multicomponent ion exchange on zeolite 4A
Kadaifci, Bijen; Yücel, Hayrettin; Department of Chemical Engineering (2011)
In this study binary and ternary ion exchange on Zeolite NaA using silver and cadmium ions were investigated. Ion exchange were conducted at constant temperature (25oC) and normality (0.1N) in a batch system for both binary and ternary experiments. Zeolite weights were varied between 0.1 and 1 g for binary experiments. Thermodynamic analysis of binary ion exchange between Cd2+-Na+ and Ag+-Na+ were examined and thermodynamic equilibrium constant and Gibbs free energy were calculated. Thermodynamic equilibriu...
On modelling of microwave heating of a ceramic material
KOZLOV, P. V.; Rafatov, İsmail; KULUMBAEV, E. B.; LELEVKIN, V. M. (2007-05-07)
A simple model is proposed and tested for simulations of ceramic processing by microwave heating. The model is based on a piecewise constant approximation of the material properties and makes it possible to separate and analyse different effects caused by the sample shape and the dependence of the material properties on temperature. Specifically, the simulation results demonstrate that microwave heating of an alumina sample can be very sensitive to a variation of its dielectric constant with temperature. Fo...
Design of a mixer for uniform heating of particulate solids in microwave ovens
Çevik, Mete; Esin, Ali; Department of Food Engineering (2011)
The aim of this study is to design a mixer with appropriate parts for uniform treatment of the material in household microwave ovens which can not be achieved with the turntable. The designed mixer’s performance was tested by the help of color and surface temperature values. In the design of the mixer primarily mixing in the vertical and radial directions were sought and for this purpose blades and wings for directing the material especially in these directions were present. The rotational motion of the mix...
An all 50 ohm divider/combiner structure
Turan, Emin; Demir, Şimşek (2002-01-01)
A novel microwave power divider/combiner structure is presented in this paper. The analysis of the structure is based on the exact matching conditions at input/output ports and a perfect isolation condition between the dividing/combining arms (ports). To analyze the structure, the necessary set of nonlinear equations is derived first, and then solved. For a special case an all-50 Ω structure is obtained (the characteristic impedances of the transmission line sections and the value of the isolation resistanc...
Citation Formats
K. Çınar, “Design and construction of a microwave plasma ion source,” M.S. - Master of Science, Middle East Technical University, 2011.