Animated-beam measurement of the photodetachment cross section of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mi mathvariant="normal">H</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math>

Génévriez, Matthieu; Urbain, Xavier

doi:10.1103/physreva.91.033403

Cited by 24 publications

(24 citation statements)

References 27 publications

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“…Photodetachment cross-sections of the negatively charged ∞ H − ions determined in this study perfectly coincide with the photodetachment cross-sections determined in experiments [20] - [24]. Furthermore, the agreement between data from Table I in [24] and our cross-sections determined at the same energies (see Tables I and II) is close to absolute (or 1:1). In general, our photodetachment cross-sections computed in the 'velocity representation' are located between five experimental curves ploted in Fig.5 from [24].…”

Section: Discussionsupporting

confidence: 87%

“…In general, our results from Tables I and II agree very well with the results of the earlier and recent experimental studies [20] - [24]. Agreement between our photodetachment crosssection of the H − ion and results obtained in other theoretical/computational works (see, e.g., [25]) can be considered as very good for those cases when the final hydrogen atom is formed in its ground 1s−state.…”

Section: Bessel Functionssupporting

confidence: 91%

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New method for highly accurate calculations of the photodetachment cross-sections of the negatively charged hydrogen ions

Frolov

2015

Chemical Physics Letters

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New approach to highly accurate calculations of the photodetachment cross-sections of the negatively charged hydrogen ions is developed. This effective, fast and numerically stable method is based on the use of the Rayleigh's formula for the spherical Bessel functions. Photodetachment cross-sections of the negatively charged hydrogen ion(sand 3 H − (tritium T − ) are determined with the use of highly accurate, truly correlated, variational wave functions constructed for these ions. Our method allows one to investigate the problem of photodetachment of the negatively charged hydrogen ions completely, i.e. without any limitation by numerical values of the photo-electron momentum p

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Section: Discussionsupporting

confidence: 87%

Section: Bessel Functionssupporting

confidence: 91%

New method for highly accurate calculations of the photodetachment cross-sections of the negatively charged hydrogen ions

Frolov

2015

Chemical Physics Letters

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“…A minority of calculations also predicts a higher value. A more recent and second laser measurement of the photodetachment finds the cross-section closer to the mean theoretical values [50]. The resulting uncertainty of the photodetachment efficiency in the SiPhoRE concept is not that large, anyway.…”

Section: Photodetachment Physicsmentioning

confidence: 63%

R&D around a photoneutralizer-based NBI system (Siphore) in view of a DEMO Tokamak steady state fusion reactor

et al. 2015

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Since the signature of the ITER treaty in 2006, a new research programme targeting the emergence of a new generation of Neutral Beam (NB) system for the future fusion reactor (DEMO Tokamak) has been underway between several laboratories in Europe. The specifications required to operate a NB system on DEMO are very demanding: the system has to provide plasma heating, current drive and plasma control at a very high level of power (up to 150 MW) and energy (1 or 2 MeV), including high performances in term of wall-plug efficiency (η > 60%), high availability and reliability. To this aim, a novel NB concept based on the photodetachment of the energetic negative ion beam is under study. The keystone of this new concept is the achievement of a photoneutralizer where a high power photon flux (~3 MW) generated within a Fabry Perot cavity will overlap, cross and partially photodetach the intense negative ion beam accelerated at high energy (1 or 2 MeV). The aspect ratio of the beam-line (source, accelerator, etc.) is specifically designed to maximize the overlap of the photon beam with the ion beam. It is shown that such a photoneutralized based NB system would have the capability to provide several tens of MW of D 0 per beam line with a wall-plug efficiency higher than 60%. A feasibility study of the concept has been launched between different laboratories to address the different physics aspects, i.e., negative ion source, plasma modelling, ion accelerator simulation, photoneutralization and high voltage holding under vacuum. The paper describes the present status of the project and the main achievements of the developments in laboratories.

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“…Also, it was assumed in [5]) that the final hydrogen atom H is formed in its ground 1 2 s−state. By evaluating the photodetachment cross-sections of the H − ion we have noticed that the maximal deviation of our results presented in this work from the experimental results published in [13] is less than 1% -2% (exact deviation depends upon the momentum of photo-electron p e ). This is a good indication of the correctness of our method.…”

mentioning

confidence: 43%

Bound state properties and photodetachment of the negatively charged hydrogen ions

Frolov

2015

Eur. Phys. J. D

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Photodetachment cross-section σ ph (p e ) of the negatively charged hydrogen ion H − is determined with the use of highly accurate variational wave functions constructed for this ion. Photodetachment cross-sections of the H − ion are also studied for very small and very large values of the photo-electron momentum p e . Maximum of this cross-section and its location have been evaluated to high accuracy. In particular, we have found that [σ ph (p e )] max ≈ 3.8627035742 ·10 −17 cm 2 at p e ≈ 0.113206(1) a.u. Our method is based upon the Rayleigh's formula for spherical Bessel functions.

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Animated-beam measurement of the photodetachment cross section ofH−

Cited by 24 publications

References 27 publications

New method for highly accurate calculations of the photodetachment cross-sections of the negatively charged hydrogen ions

New method for highly accurate calculations of the photodetachment cross-sections of the negatively charged hydrogen ions

R&D around a photoneutralizer-based NBI system (Siphore) in view of a DEMO Tokamak steady state fusion reactor

Bound state properties and photodetachment of the negatively charged hydrogen ions

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