Results 31 to 40 of about 594,915 (259)
Sensitivity analysis of divergence of ion beam with respect to changes of shape of acceleration grid in kaufman type ion sources [PDF]
Computer Methods in Materials Science, 2009 This paper presents results of simulation for ion extraction from Kaufman type ion source by using CPO 2DS software. For electric potential and field determination the Boundary Element Method (BEM) implemented in CPO 2DS computer program is used ...
Jacek Rońda, Dominik Osiński
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He jishu, 2022 BackgroundThe high power ion source is the one of the key components of a neutral beam injection system. Long pulse operation of ion source is required for fusion sciences research, but challenges come from the easy break down when operated with long ...
XIE Yahong +8 more
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Synergistic perspectives—How single‐molecule biophysics complement biochemical understanding
FEBS Letters, EarlyView.In this review, we discuss how ensemble biochemistry and single‐molecule approaches are complementary, outline commonly used single‐molecule techniques, and illustrate their relevance through two representative case studies: chromatin organization by SMC complexes and pathway choice during DNA double‐strand break repair.
Sara De Bragança +2 more
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New Journal of Physics, 2017 Negative ion sources for fusion are high densities plasma sources in large discharge volumes. There are many challenges in the modeling of these sources, due to numerical constraints associated with the high plasma density, to the coupling between plasma
G Fubiani +4 more
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New Ion Source Filament for Prolonged Ion Source Operation on A Medical Cyclotron
Instruments, 2019 Cyclotrons are an important tool for accelerator sciences including the production of medical isotopes for imaging and therapy. For their successful and cost-efficient operation, the planned and unplanned down time of the cyclotron needs to be kept at a ...
Dave Prevost +4 more
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FEBS Letters, EarlyView.Encapsulins are protein nanocompartments that play an important role in iron storage. In the Myxococcus xanthus encapsulin system, two cargo proteins called EncB and EncC contribute to iron mineralization. Here, we show that EncB and EncC generate iron‐containing minerals with distinct chemical compositions, suggesting that the composition of stored ...
Harry B. McDowell +2 more
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Diagnostics tools and methods for negative ion source plasmas, a review
New Journal of Physics, 2017 Plasma parameter measurements for negative hydrogen (H ^− ) ion sources have been playing an important role in clarifying fundamental physics related to negative ion production and destruction processes. Measured data of beam properties, such as H ^− ion
Katsuyoshi Tsumori, Motoi Wada
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Rotational and nuclear-spin level dependent photodissociation dynamics of H2S
Nature Communications, 2021 The photodissociation dynamics of small molecules in the vacuum ultraviolet range can have key implications for astrochemical modelling, but revealing such dynamical details is a challenging task.
Yarui Zhao +14 more
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Structural and biochemical analysis of a B12 superbinder
FEBS Letters, EarlyView.BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices +3 more
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Effects of ion extraction on discharges in gridded ion source
AIP Advances, 2022 Effects of ion extraction on gridded ion source discharge or the coupling between ion extraction and gridded ion source discharge are investigated for the first time by correlating the ratio of the ion impingement current (Ia) to ion beam current (Ib ...
Y. R. Yang, S. H. Fu, Z. F. Ding
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