China
Africa
Explore chapters and articles related to this topic
Electrical Discharge Machining
Published in V. K. Jain, Advanced Machining Science, 2023
Mahavir Singh, J. Ramkumar, V. K. Jain
where ε0 is the permittivity of free space, K is the Boltzmann's constant, and e is the charge of an electron. The Debye length for arc discharges is measured to be around 0.7 µm [34]. For classification of the plasma, a parameter generally termed the plasma parameter (˄) is determined. This parameter defines the number of particles in a sphere called the Debye sphere having a radius equal to the Debye length. It is given as follows [34]: ^=4πneλd3
Higher-order dust kinetic Alfvén wave solitons and quasi-periodic waves in a polarized dusty plasma
Published in Waves in Random and Complex Media, 2023
In Figure 2, the DKAWSs profile with the variation of nonthermal parameter is illustrated. It is seen that with the increasing value of nonthermal parameter of electrons , the amplitude and width of the DKAW solitons are increased. Figure 3 depicts the variation of DKAWSs profile with the change in plasma parameter . It is seen that with an increase in the value of , the amplitude remains the same but the width increases. It is numerically seen that plasma parameters such as , , and have an emphatic effect on the propagation characteristics of DKAWSs. The change in amplitude and width of DKAWSs occurs due to the variation in nonlinearity and dispersion effects in the given plasma system.
Investigation of an arbitrary solitary wave and head on collision between two solitary waves in a strongly coupled complex plasma
Published in Waves in Random and Complex Media, 2022
Bo Liu, Fang-Ping Wang, Lin Wei, Sheng Zhang, Heng Zhang, Wen-Shan Duan
Present paper has given the dependence of the phase shift on the dusty plasma parameters such as the ratio of the mean particle distance to the screening length, which has potential applications. For example, by measuring the relation between the phase shit and the plasma parameters for a head on collision between two same amplitude solitary waves, we can obtain the screening length from the relationship between phase shift and the dusty plasma parameter, and then we can obtain the electron number density from the neutrality condition. Then the mean charge of a dust particle is given by using the neutrality condition. This result has potential application to measure the dust charge of a dust particle for a dusty plasma. The dependence of the phase shift on the number density of the dust particles suggest that we can estimate the number density of the dust particles for a given dusty plasma by measuring the phase shift of a head on collision between two solitary waves. The relationship between the phase shift and the plasma parameters can also help us to estimate the ratio of the total dust charge to the total electron charge.
Development of Real-Time Software for Thomson Scattering Analysis at NSTX-U
Published in Fusion Science and Technology, 2019
Roman Rozenblat, Egemen Kolemen, Florian M. Laggner, Christopher Freeman, Greg Tchilinguirian, Paul Sichta, Gretchen Zimmer
The plasma parameter calculation function first determines if the peak can be used for calculation. For example, if the channel is saturated or the channel is inactive, the peak will be marked as bad. Each peak is then adjusted by subtracting the average baseline preshot voltage, and the adjusted peak values are passed to a function, which fits the Thomson spectrum. This function attempts an iterative Thomson spectrum fitting on the inputted peaks. If it does not converge after a preset amount of time, it will exit the function.