Theoretical and experimental studies of a planar inductive coupled rf plasma source as the driver in simulator facility (ISTAPHM) of interactions of waves with the edge plasma on tokamaks

Ghanei, V.; Nasrabadi, M.N.; Chin, O. H.; Jayapalan, Kanesh Kumar

doi:10.1088/1748-0221/12/11/p11024

Cited by 1 publication

(12 citation statements)

References 18 publications

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“…As a result of electron collisions, the energy will be transferred to the heavy particles in order to have Ohmic Heating (OH). Then using momentum equation, Maxwell's equations and boundary conditions and assuming a low excitation frequency of sinusoidal time-varying EM fields of RF generator, one can ignore the displacement current to achieve EM fields' components as following [1,[13][14][15][16]. Now, using the method of separation of variables, the analytical solutions for the electric and magnetic fields inside the inductively coupled RF plasma source can be summarized as following equations set: In which A n , B n , C n , λ n , k n , L and D were derived and introduced in our previous paper [1].…”

Section: Theoretical Approachmentioning

confidence: 99%

“…The increase in the average plasma potential is due to DC electric fields in the plasma sheath in front of the ICRF antenna. Therefore, studying the rectified electric field in front of the antenna due to the interaction of the ICRF antenna and Tokamak's plasma is of particular importance [1][2][3]. In our previous work, the idea of "Ion Sheath Test Arrangement with external Plasma source was designed to reach Helicon Mode (ISTAPHM)" (which can be an economical system for investigating these rectified DC electric fields in front of the ICRF antenna) was presented [1].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, studying the rectified electric field in front of the antenna due to the interaction of the ICRF antenna and Tokamak's plasma is of particular importance [1][2][3]. In our previous work, the idea of "Ion Sheath Test Arrangement with external Plasma source was designed to reach Helicon Mode (ISTAPHM)" (which can be an economical system for investigating these rectified DC electric fields in front of the ICRF antenna) was presented [1]. In this work, considering ISTAPHM simulator, the interactions between (ICRF) antenna and the plasma of the edge of tokamak are investigated.…”

Section: Introductionmentioning

confidence: 99%

“…ISTAPHM enables us to have a better accessibility to the diagnostics and other equipment near the ICRF antenna than tokamaks. The ICRF antenna in ISTAPHM simulator is located in a vacuum vessel at low pressure (6-10 mbar) and is equipped with two 8 kA coils which provide a Linear Static Magnetic Field (LSMF) up to 0.2 T near the ICRF antenna [1]. There is an external 2019 JINST 14 P03013 plasma source consists of an ICP Reactor with PA that is connected to a glass tube, four magnetic coils (operated at 1 kA) and a right-handed helical antenna [1].…”

Section: Introductionmentioning

confidence: 99%

“…The ICRF antenna in ISTAPHM simulator is located in a vacuum vessel at low pressure (6-10 mbar) and is equipped with two 8 kA coils which provide a Linear Static Magnetic Field (LSMF) up to 0.2 T near the ICRF antenna [1]. There is an external 2019 JINST 14 P03013 plasma source consists of an ICP Reactor with PA that is connected to a glass tube, four magnetic coils (operated at 1 kA) and a right-handed helical antenna [1]. The outputted plasma from the external plasma source is magnetized and is powered by a helical antenna up to 3 kW at 13.56 MHz.…”

Section: Introductionmentioning

confidence: 99%

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Design and optimization of an ICP reactor with planar antenna as a driver in ISTAPHM and validation of AMPICP model

Ghanei

Nasrabadi

2019

J. Inst.

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The present work is related to the method for designing a driver for low pressure plasma sources using the AMPICP model. Particularly, it is related to equipment for producing plasma, which can be used for driver of the simulator project (ISTAPHM) of the interactions between ICRF antenna and plasma on Tokamak Nuclear Fusion Reactors. Here, two important aspects of this modeling are discussed: firstly, optimization of geometrical parameters for driver of source plasma in ISTAPHM and secondly, Simulation and computation of the EM fields adjusted for a planar antenna (PA) of driver. The work is focused on the characterization of low pressure Inductively Coupled Plasma (ICP) source and the features of a helicon chamber. Numerical simulations of ICP with PA were presented to optimize the plasma characteristics. The results of the AMPICP model for designing of ICP reactor as the driver in ISTAPHM were also evaluated using the power balance model. This paper also presents a two dimensional simulation for the EM field inside the ICP reactor for homogeneous plasma and compares the optimized and laboratory results with each other. From the measurements of the magnetic field inside the reactor using a magnetic probe, the electron number density and effective collision frequency can be estimated. The form of magnetic field lines inside the vessel was investigated and theoretical field lines were presented in the paper. The results of analyses as a function of operating parameters were presented to be measured with fixed and movable Langmuir probes. Optical Emission Spectra were recorded for different gas flow rates and filling pressures at constant power level by spectrometer. The variation in the intensity ratio of the selected emission lines, electron temperature and density was studied as a function of gas flow rate and filling pressure. K: Plasma diagnostics -probes; Plasma generation (laser-produced, RF, x ray-produced)1Corresponding author.

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