A Thomson-type mass and energy spectrometer for characterizing ion energy distributions in a coaxial plasma gun operating in a gas-puff mode

Rieker, Gregory B.; Poehlmann, Flavio; Cappelli, Mark A.

doi:10.1063/1.4816028

Cited by 9 publications

(5 citation statements)

References 26 publications

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“…Multiple ion groups are also observed in other types of pulsed plasma devices with similar diagnostics above, as in gas-fed PPTs [18,53] and vacuum arc thrusters (VATs) [54,55]. In the former, the findings include the presence of highly ionized electrode material too.…”

Section: Introductionmentioning

confidence: 80%

Pulsed plasma thruster exhaust reconstruction

Barquero,

Navarro-Cavallé,

Merino

2024

Plasma Sources Sci. Technol.

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The transient exhaust of an ablative pulsed plasma thruster is characterized experimentally for three capacitances and threedischarge voltages, for discharge energies below 11 J. A novel analysis technique is introduced, which reconstructs the exhaustas a superposition of different Maxwellian-like ion groups. Each ion group is characterized by its own mean velocity, thermalspread, initial density, generation time and divergence rate. The time series of three probes working in the ion saturationregime are used to determine the value of the model parameters by least-squares fitting. This approach allows a higher levelof accuracy and insight than time-of-flight analysis based on direct feature correlation alone. A good fit of the main part ofthe discharge time series is achieved with just three ion groups, with mean velocities ranging in 50–70, 30–45 and 10–25 km/srespectively. Each ion group differs in the lateral divergence rate and axial thermal spread, and potentially corresponds with adifferent charge/mass ratio and/or creation time. Some trends with bank capacitance and discharge voltage are identified anddiscussed.

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Section: Introductionmentioning

confidence: 80%

Pulsed plasma thruster exhaust reconstruction

Barquero,

Navarro-Cavallé,

Merino

2024

Plasma Sources Sci. Technol.

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“…Another mode of operation, called plasma deflagration mode, may enable PB guns to provide a still higher fluence of particles with kinetic energies that are several orders of magnitude higher than the common snow-plow mode [14]. Studies are underway to find the detailed mechanism for production of ions in the plasma deflagration mode [15]. It may be reasonably expected that PB systems will in near future provide ion densities in excess of 10 17 /cm 3 and effective volumes several hundreds of cm 3 and quasi-continuous operation in terms of several tens of Hz pulse repetition rates.…”

Section: Ion and Plasma Beamsmentioning

confidence: 98%

Slow neutron reactions in inverse kinematics for isotope production: a primer

John

2014

J Radioanal Nucl Chem

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Slow neutron inverse-kinematic reactions offer unique advantages since their kinematical conditions can be tuned to utilize very high resonance cross-sections and to separate transmuted-isotopes online. New advances in plasma sciences and thermal neutron facilities can usher practical applications of this type of reactions in some special cases. Production and implantation of isotopicallypure short-lived and spin-polarized radiotracers has been identified as a probable first application. The production rates for 110m,g Ag radio-nuclides in 109 Ag(n, c) capture, that occur when a beam of 109 Ag ions traverses a thermal neutron column, have been calculated and the results are presented. To develop the idea of inverse reactions in physical grounds, further analyses and advances on the non-trivial technological issues related to the generation and control of high density and high volume particle beams, isotope separation methods, and high flux thermal neutron channels of matching parameters are required and a brief discussion on these aspects are also included.

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“…In this paper, the Stark broadening method is used to calculate the electron density [9,12,23,[25][26][27][28]. The fitted line as shown in figure 6(a) can be obtained by fitting the H β line in figure 5.…”

Section: Characteristics Of Plasmamentioning

confidence: 99%

Experimental study on plasma generated by a tapered coaxial accelerator and its damage effects on a tungsten target at different angles

Zhao¹,

Chen²,

Song³

et al. 2022

Plasma Phys. Control. Fusion

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Plasma wall interaction (PWI) will occur inevitably during the operation of Tokamak. The coxial gun device has low operation cost and parameters of plasma produced by the gun are close to those of type I ELM, therefore, the coaxial gun is suitable in simulation experiment as heat-flux sources of transient events such as type I ELM under the condition of H-mode in ITER. In this paper, the plasma generated by the discharge of a tapered coaxial accelerator thermal shock on a tungsten target to simulate the damage effect of the divertor. The plasma parameters are measured in the experiment. The velocity of the plasma is 41.7 km/s, and the kinetic energy of a single hydrogen ion is 9.2 eV. The energy density at the center of the plasma can reach 1.5 MJ/m2, and the density can reach about 2.78×1015 /cm3. The reflection of plasma in the process of exposure at different angles is observed. It is observed that droplets of millimeter size splash from the target. Traces of liquid flow are observed on the surface of the target, which shows that there is a melting process on the surface of target. The mass loss of the target is in the order of mg after 20 pules. The ablation and residual stress of the target surface both decrease with the decrease of the angle. This is because the accumulated energy per unit area of the target surface decreases with the decrease of the angle. These results help us to better understand the damage effect of tungsten target for further research.

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A Thomson-type mass and energy spectrometer for characterizing ion energy distributions in a coaxial plasma gun operating in a gas-puff mode

Cited by 9 publications

References 26 publications

Pulsed plasma thruster exhaust reconstruction

Pulsed plasma thruster exhaust reconstruction

Slow neutron reactions in inverse kinematics for isotope production: a primer

Experimental study on plasma generated by a tapered coaxial accelerator and its damage effects on a tungsten target at different angles

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