2019
DOI: 10.1063/1.5109240
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Status of high current H2+ and H3+ ion sources

Abstract: This paper aims to summarize the developments of high current H2+ and H3+ ion sources in the past decades. The status of the H2+ and H3+ ion sources is discussed to show the attempts researchers made to improve the beam currents of H2+ and H3+. The results of the 2.45 GHz electron cyclotron resonance ion source named PMECR II at Peking University are presented, which may provide an alternative reference for the design and operation of high current H2+ and H3+ ion sources.

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Cited by 11 publications
(7 citation statements)
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“…H3+ ions are relatively easy to produce in Jupiter's ionosphere (Miller et al., 2020; Wu et al., 2019). Precipitating electrons ionize molecular hydrogen producing the H2+ ion, which under the atmospheric conditions of most auroral processes almost immediately reacts with H2 to form H3+ according to the reaction H2++H2H3++normalH. …”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…H3+ ions are relatively easy to produce in Jupiter's ionosphere (Miller et al., 2020; Wu et al., 2019). Precipitating electrons ionize molecular hydrogen producing the H2+ ion, which under the atmospheric conditions of most auroral processes almost immediately reacts with H2 to form H3+ according to the reaction H2++H2H3++normalH. …”
Section: Introductionmentioning
confidence: 99%
“… 3 H E ions are relatively easy to produce in Jupiter's ionosphere (Miller et al, 2020;Wu et al, 2019). Precipitating electrons ionize molecular hydrogen producing the…”
mentioning
confidence: 99%
“…ACCT current is almost constant from 0.4 to 6 ms for microwave power larger than 150 W. microwave power larger than 150 W. Moreover, rise and fall times are of the order of few hundreds of microseconds, much smaller than the pulse length. Several works show that plasma parameters reach steady state conditions in ∼0.6 ms after plasma switch on [30,31]. Therefore, for the purposes of this work, PS-ESS plasma can be assumed in steady state conditions during OES measurements.…”
Section: Fig 4 Ps-ess Beam Pulse Measured By the Acct For Valuesmentioning
confidence: 99%
“…JIRAM L‐band imager, whose observations will be the backbone throughout the present work, covers the 3.3–3.6 μm range, where the emission from H3+ ${\mathrm{H}}_{3}^{+}$ ions can be detected with a good contrast against the sunlit planetary disc. These ions are a byproduct of the electron precipitation (Miller et al., 2020; Wu et al., 2019): leftrightlefte+H2H2++2erightleftH2++H2H+H3++1.74eV \begin{align*}\hfill & {e}^{-}\quad +\quad {H}_{2}\quad \to \quad {H}_{2}^{+}\quad +\quad 2{e}^{-}\hfill \\ \hfill & {H}_{2}^{+}\quad +\quad {H}_{2}\quad \to \quad H\quad +\quad \left({H}_{3}^{+}\quad +\quad 1.74\quad eV\right)\hfill \end{align*} where the H3+ ${\mathrm{H}}_{3}^{+}$ retains 1.74 eV of internal energy that is subsequently radiated as IR emission (Oka, 1980). The emission is expected to occur above 500 km from the 1‐bar pressure level, as at lower altitude the H3+ ${\mathrm{H}}_{3}^{+}$ is rapidly destroyed by its reaction with methane (Gérard et al., 2018; Grodent et al., 2001).…”
Section: Introductionmentioning
confidence: 99%