DESIGN OF A 60 GHz, 100 kW CW GYROTRON FOR PLASMA DIAGNOSTICS: GDS-V.01 SIMULATIONS

Jain, Ragini; Kartikeyan, M. V.

doi:10.2528/pierb10061508

Cited by 20 publications

(10 citation statements)

References 23 publications

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“…It shows that in ICPs, the role of electron temperature and electrons number density (n e ) is much important to understand the phenomena of electron impact ionization and excitation processes [9]. In order to fully characterize the ICPs, lot of work has been done in the past and many efforts are under way for the measurement of plasma parameters like kT e , n e , ion number density (n i ), electron saturation current (I eo ), ion saturation current (I io ), plasma potential (V s ) and electron energy distribution function (EEDF) in a very precise way [5].…”

Section: Introductionmentioning

confidence: 99%

Double and Triple Langmuir Probes Measurements in Inductively Coupled Nitrogen Plasma

Naz¹,

Ghaffar²,

Rehman³

et al. 2011

PIER

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Abstract-The double and triple Langmuir probe diagnostic systems with their necessary driving circuits are developed successfully for the characterization of laboratory built low pressure inductively coupled nitrogen plasma, generated by 13.56 MHz radio frequency (RF) power supply along with an automatic impedance matching network. Using the DC properties of these two probes, the discharge plasma parameters like ion saturation current (I io ), electron temperature (kT e ) and electron number density (n e ) are measured at the input RF power ranging from 250 to 400 W and filling gas pressures ranging from 0.3 to 0.6 mbar. An increasing trend is observed in kT e and n e with the increase of input RF power at a fixed filling gas pressure of 0.3 mbar, while a decreasing trend is observed in kT e and n e with the increase of filling gas pressure at a fixed input RF power of 250 W.

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Section: Introductionmentioning

confidence: 99%

Double and Triple Langmuir Probes Measurements in Inductively Coupled Nitrogen Plasma

Naz¹,

Ghaffar²,

Rehman³

et al. 2011

PIER

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“…Although various components have been developed for THz applications [5][6][7][8][9][10][11][12][13][14][15][16][17][18], high power, low cost, and compact THz sources are not readily available [19]. With the rapid advancement of multi-physics based codes, which provide the possibility of simulating the nonlinear beam-wave interaction dynamics [20][21][22][23][24], extending the operating frequency of the existing microwave tube designs [25][26][27][28][29] has become a promising approach for developing compact and powerful THz sources [30][31][32][33][34][35][36]. In accordance with this approach, design and numerical simulations of a 140 GHz spatial-harmonic magnetron (SHM) with a maximum pulse-output power of about 11 kW is presented in this paper.…”

Section: Introductionmentioning

confidence: 99%

DESIGN AND 3-D PARTICLE-IN-CELL SIMULATION OF A 140 GHz SPATIAL-HARMONIC MAGNETRON

Esfahani¹,

Tayarani²,

Schunemann³

2013

PIER

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Abstract-This paper discusses design procedure and 3-D numerical simulation of a 140 GHz spatial-harmonic magnetron (SHM). The well known scaling laws and an approximate approach based on single harmonic analysis are used to determine the interaction space dimensions and the optimum geometrical parameters of the side resonators. Numerical simulations of the SHM were performed using CST-Particle Studio. Since the simulations are not based on artificial RF priming or assuming restrictive assumptions on the mode of operation or on the number of harmonics to be considered, electromagnetic oscillations grow naturally from noise. The presented SHM shows stable operation in the π/2 − 1-mode at 140 GHz over a range of DC anode voltages extending from 11.3 kV to 11.5 kV and for an axial magnetic flux density equal to 0.79 T. Output power of the SHM varies from 2 kW to 11 kW over these voltages with a maximum efficiency of about 6.8%.

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“…It is very simple in its implementation and provides detailed information about plasma parameters such as electron temperature (kT e ), electron number density (n e ), electron energy distribution function (EEDF) [10], densities of excited species, ionization and dissociation of discharge plasma species [11]. During the chemical reactions and excitation processes associated with reactive species, the electron impact causes a small fraction of discharge plasma species to move into upper excited states.…”

Section: Introductionmentioning

confidence: 99%

OPTICAL CHARACTERIZATION OF 50 Hz ATMOSPHERIC PRESSURE SINGLE DIELECTRIC BARRIER DISCHARGE PLASMA

Naz¹,

Ghaffar²,

Rehman³

et al. 2012

PIER M

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Abstract-A low frequency (50 Hz) dielectric barrier discharge (DBD) system with a single dielectric cover on copper coil anode is designed to generate and sustain the micro-discharge plasma which is very practical for material processing applications. The DBD system is powered by a high tension ac source consisting of a conventional step up transformer and variac. The dielectric barriers (quartz and glass) between the conducting electrodes appreciably influences the discharge plasma characterized by optical emission spectroscopy technique. Using intensity ratio method, the electron temperature and electron number density are determined from recorded spectra as function of ac input voltage, type and thickness of dielectric barrier and inter-electrode gap. It is observed that both the electron temperature and electron number density increase with the increase in ac input voltage and ε r / d ratio, while a decreasing trend is observed with increase in inter-electrode gap.

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DESIGN OF A 60 GHz, 100 kW CW GYROTRON FOR PLASMA DIAGNOSTICS: GDS-V.01 SIMULATIONS

Cited by 20 publications

References 23 publications

Double and Triple Langmuir Probes Measurements in Inductively Coupled Nitrogen Plasma

Double and Triple Langmuir Probes Measurements in Inductively Coupled Nitrogen Plasma

DESIGN AND 3-D PARTICLE-IN-CELL SIMULATION OF A 140 GHz SPATIAL-HARMONIC MAGNETRON

OPTICAL CHARACTERIZATION OF 50 Hz ATMOSPHERIC PRESSURE SINGLE DIELECTRIC BARRIER DISCHARGE PLASMA

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