The research of photoneutralization of negative hydrogen and deuterium ion beams in non-resonance photon open trap

Atlukhanov, M. G.; Burdakov, A. V.; Ivanov, A. A.; Kasatov, A. A.; Kolmogorov, A.; Попов, Сергей Сергеевич; Ushkova, M. Yu.; Vakhrushev, R. V.

doi:10.1063/1.4964180

Cited by 6 publications

(3 citation statements)

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“…Such a trap is particularly attractive for photoneutralization of negative ion beams in fusion applications [3,21]. Recent sufficiently successful experiments on photon neutralization of negative ion beam have been carried out [22]. In this work, the adiabatic photon trap from the same mirrors and laser were used.…”

Section: Discussionmentioning

confidence: 99%

High efficiency radiation accumulator for powerful lasers with low beam quality

et al. 2018

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Experimental studies of the concept of an efficient radiation trap based on the adiabatic photon confinement between curved mirrors is presented in the paper. Such a trap is free from restrictions typical to the Fabry-Perot cells, relating to the confined radiation quality, accuracy and stabilization of optical elements. Experiments have demonstrated the high efficiency of confinement, which mainly depends on the reflectivity of mirrors and their surface defects.

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Section: Discussionmentioning

confidence: 99%

High efficiency radiation accumulator for powerful lasers with low beam quality

et al. 2018

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“…The non-resonance adiabatic trap was also experimentally studied in [7]. Long photon lifetime in the trap and high accumulation factor of photons allowed carrying out first experiments on photon neutralization of low current and small diameter beams of H − and D − ions [11,12]. Very high neutralization efficiency was demonstrated.…”

Section: Neutralization Of Negative Hydrogen and Deuterium Ion Beams ...mentioning

confidence: 99%

“…In the first set of experiments [11], the slit height was set to 2 mm, the maximal height allowed by the detector geometry. Therefore, it was possible to measure the negative ion beam current with a rather high time resolution of 0.5 μs or better.…”

Section: First Measurement Of Neutralization Efficiency With Photon Cellmentioning

confidence: 99%

Neutralization of negative hydrogen and deuterium ion beams using non-resonance adiabatic photon trap

et al. 2018

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Experimental results on neutralization of negative ion beams in a photon stripping target are presented. For the energy of beams used in these studies (6–10 keV), the maximum neutralization efficiency is 95%. In contrast with gas or plasma neutralizers, the generation of positive ions from the negative ion beam was negligible. A non-resonance photon trap with highly reflecting mirrors of special shape was used as a stripping target. Due to a special mirror shape, in the process of photons reflections and propagation inside the trap there are some adiabatically conserved invariants that limits the volume accessible for photon motion even if the mirror surface is not closed. This approach makes it possible to overcome limitations typical for the Fabry–Perot cells, which require high radiation quality, high quality of the optical elements, and very high mechanical stability of the cell. The trap was pumped by commercially available fiber laser (λ = 1070 nm, Δλ = 7 nm, P = 2.1 kW) through a small hole in the mirror. The experiments were carried out with H- and D-beams. The observed neutralization efficiency depended mainly on the reflectivity of the mirrors, on defects on their surface, and on the laser pumping power.

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Development of Conversion Targets for High-Energy Neutral Beam Injectors

Dudnikov

2023

Springer Series on Atomic, Optical, and Plasma Physics

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The research of photoneutralization of negative hydrogen and deuterium ion beams in non-resonance photon open trap

Cited by 6 publications

References 4 publications

High efficiency radiation accumulator for powerful lasers with low beam quality

High efficiency radiation accumulator for powerful lasers with low beam quality

Neutralization of negative hydrogen and deuterium ion beams using non-resonance adiabatic photon trap

Development of Conversion Targets for High-Energy Neutral Beam Injectors

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