Plasma Source for a Miniature and Repetitive Plasma Opening Switch

Kumar, Rajesh; Novac, B.M.; Smith, I.R.; Greenwood, C.

doi:10.1109/ipmc.2008.4743612

Cited by 4 publications

(3 citation statements)

References 2 publications

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“…insulator has the hydrogen (H + ) and carbon (C + , C ++ ) ions (species) in the plasma as per the spectroscopic and charge collector studies in literature [23][24][25][26]. The plasma species is identified using the Faraday cup diagnostic and the plasma density is measured by placing the Faraday cup at 25mm from the plasma gun where the cathode of POS is placed.…”

Section: Resultsmentioning

confidence: 99%

“…The plasma density of H-plasma and C-plasma are (1.6 ± 0.5) × 10 19 m −3 and (2.8 ± 0.6) × 10 19 m −3 with velocities measured using plasma transit times at two locations axial to the plasma gun are (4.54 ± 0.25) cm/μs and (1.81 ± 0.18) cm/μs respectively. The first peak in the density waveform in figure 4 is the H-plasma cloud and the second peak is the C-plasma cloud because the hydrogen has a lower mass and higher velocity compared to the carbon ions [25] and as the hydrogen ion has a single proton, it rapidly recombines with the electrons compared to carbon ions [23,27,28]. These plasma parameter measurement experiments are carried out on a single plasma gun in the vacuum chamber by removing the cathode electrode.…”

Section: Resultsmentioning

confidence: 99%

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Simulation and experimental results of plasma opening switch operation with inductive and electron beam diode loads in different plasma regimes

Kanchi,

Shukla,

Sharma

2024

Phys. Scr.

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This paper reports the experimental results of a plasma opening switch (POS) that operates at hydrogen and carbon plasma regimes confirmed based on the conduction bipolar limit of the plasma species and the availability of plasma species during the conduction based on the density profiles. The generator is the compact capacitor bank developed using the synchronization of four field distortion spark gap switches. The plasma source is coaxial cable plasma guns characterized using the Faraday cup plasma diagnostic. The experimental results are compared with the time domain simulation code in which the POS is represented as the dynamic resistance governed by the physical equations of the bipolar model. The experiments and simulations are compared for inductive load and dynamic load of accelerating gap of 5 mm between the anode and cathode at the load end. From the results, POS can be operated based on the availability of plasma species with proper synchronized triggering between the plasma gun firing and generator firing that can operate at low and high values of currents.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Simulation and experimental results of plasma opening switch operation with inductive and electron beam diode loads in different plasma regimes

Kanchi,

Shukla,

Sharma

2024

Phys. Scr.

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“…Only these electrons have maximum chances to escape from an aperture that has energy . collector studies in references [29,30]. The parameters considered for calculation of density of hydrogen and carbon plasma respectively using TLP and FC are given in table 1.…”

Section: Simulations Of the Faraday Cupmentioning

confidence: 99%

Study of plasma parameters of coaxial plasma source using triple Langmuir probe and Faraday cup diagnostics

KANCHI,

SHUKLA,

SHARMA

2024

Plasma Sci. Technol.

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Coaxial plasma guns are a type of plasma source that produces plasma which propagates radially and axially controlled by the shape of the ground electrode, which has attracted much interest in several applications. In this work, a 120° opening angle of CPG nozzle is used as a plasma gun configuration that operates at the energy of 150 J. The ionization of polyethylene insulator between the electrodes of the gun produces a cloud of hydrogen and carbon plasma. The triple Langmuir probe and Faraday cup are used to measure plasma density and plasma temperature. These methods are used to measure the on-axis and off-axis plasma divergence of the coaxial plasma gun. The peak values of ion densities measured at a distance of 25 mm on-axis from the plasma gun are (1.6±0.5) × 1019 m-3 and (2.8±0.6) × 1019 m-3 for hydrogen and carbon plasma respectively and the peak temperature is (3.02±0.5) eV. The mean propagation velocity of plasma is calculated using the transit times of plasma at different distances from the plasma gun and is found to be (4.54±0.25) cm/μs and (1.81±0.18) cm/μs for hydrogen and carbon plasma respectively. The Debye radius is obtained from the measured experimental data that satisfies the thin sheath approximation. The shot-to-shot stability of plasma parameters facilitates the use of plasma guns in laboratory experiments. These types of plasma sources can be used in many applications like plasma opening switches, plasma devices, and as plasma sources.

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