Zobrazeno 1 - 10 of 260 pro vyhledávání: '"R J Clarke"'
1
Akademický článek
Diagnosis of Weibel instability evolution in the rear surface density scale lengths of laser solid interactions via proton acceleration
Autor: G G Scott, C M Brenner, V Bagnoud, R J Clarke, B Gonzalez-Izquierdo, J S Green, R I Heathcote, H W Powell, D R Rusby, B Zielbauer, P McKenna, D Neely
Publikováno v: New Journal of Physics, Vol 19, Iss 4, p 043010 (2017)
It is shown for the first time that the spatial and temporal distribution of laser accelerated protons can be used as a diagnostic of Weibel instability presence and evolution in the rear surface scale lengths of a solid density target. Numerical mod
Externí odkaz: https://doaj.org/article/0710ec2c88c3473e85e4d202be824000
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3
Akademický článek
Proton acceleration enhanced by a plasma jet in expanding foils undergoing relativistic transparency
Autor: H W Powell, M King, R J Gray, D A MacLellan, B Gonzalez-Izquierdo, L C Stockhausen, G Hicks, N P Dover, D R Rusby, D C Carroll, H Padda, R Torres, S Kar, R J Clarke, I O Musgrave, Z Najmudin, M Borghesi, D Neely, P McKenna
Publikováno v: New Journal of Physics, Vol 17, Iss 10, p 103033 (2015)
Ion acceleration driven by the interaction of an ultraintense (2 × 10 ^20 W cm ^−2 ) laser pulse with an ultrathin ( $\leqslant 40$ nm) foil target is experimentally and numerically investigated. Protons accelerated by sheath fields and via laser
Externí odkaz: https://doaj.org/article/67cfc83891514720816cc5109f4b7b53
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4
Akademický článek
Optimization of plasma mirror reflectivity and optical quality using double laser pulses
Autor: G G Scott, V Bagnoud, C Brabetz, R J Clarke, J S Green, R I Heathcote, H W Powell, B Zielbauer, T D Arber, P McKenna, D Neely
Publikováno v: New Journal of Physics, Vol 17, Iss 3, p 033027 (2015)
We measure a record 96 ±2.5% specularly reflected energy fraction from an interaction with a plasma mirror (PM) surface preionized by a controlled prepulse and find that the optical quality is dependent on the inter pulse time delay. Simulations sho
Externí odkaz: https://doaj.org/article/8513f5b705244bf5bbd53058cc926507
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5
Akademický článek
Rem2 interacts with CaMKII at synapses and restricts long-term potentiation in hippocampus.
Autor: Rabia Anjum, Vernon R J Clarke, Yutaro Nagasawa, Hideji Murakoshi, Suzanne Paradis
Publikováno v: PLoS ONE, Vol 19, Iss 7, p e0301063 (2024)
Synaptic plasticity, the process whereby neuronal connections are either strengthened or weakened in response to stereotyped forms of stimulation, is widely believed to represent the molecular mechanism that underlies learning and memory. The holoenz
Externí odkaz: https://doaj.org/article/4b0e0b3f069b44d1ac049970e62c18c2
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6
Akademický článek
GABAergic regulation of striatal spiny projection neurons depends upon their activity state.
Autor: Michelle Day, Marziyeh Belal, William C Surmeier, Alexandria Melendez, David Wokosin, Tatiana Tkatch, Vernon R J Clarke, D James Surmeier
Publikováno v: PLoS Biology, Vol 22, Iss 1, p e3002483 (2024)
Synaptic transmission mediated by GABAA receptors (GABAARs) in adult, principal striatal spiny projection neurons (SPNs) can suppress ongoing spiking, but its effect on synaptic integration at subthreshold membrane potentials is less well characteriz
Externí odkaz: https://doaj.org/article/ef860bbfbe264102b49f9ce76eae0b2d
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7
Akademický článek
Influence of spatial-intensity contrast in ultraintense laser–plasma interactions
Autor: R. Wilson, M. King, N. M. H. Butler, D. C. Carroll, T. P. Frazer, M. J. Duff, A. Higginson, R. J. Dance, J. Jarrett, Z. E. Davidson, C. D. Armstrong, H. Liu, S. J. Hawkes, R. J. Clarke, D. Neely, R. J. Gray, P. McKenna
Publikováno v: Scientific Reports, Vol 12, Iss 1, Pp 1-10 (2022)
Abstract Increasing the intensity to which high power laser pulses are focused has opened up new research possibilities, including promising new approaches to particle acceleration and phenomena such as high field quantum electrodynamics. Whilst the
Externí odkaz: https://doaj.org/article/48653965fe2c4e219917033cec4ca86a
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8
Akademický článek
Near-100 MeV protons via a laser-driven transparency-enhanced hybrid acceleration scheme
Autor: A. Higginson, R. J. Gray, M. King, R. J. Dance, S. D. R. Williamson, N. M. H. Butler, R. Wilson, R. Capdessus, C. Armstrong, J. S. Green, S. J. Hawkes, P. Martin, W. Q. Wei, S. R. Mirfayzi, X. H. Yuan, S. Kar, M. Borghesi, R. J. Clarke, D. Neely, P. McKenna
Publikováno v: Nature Communications, Vol 9, Iss 1, Pp 1-9 (2018)
It is a challenge to scale up laser-ion acceleration to higher ion energies. Here the authors demonstrate a hybrid acceleration scheme based on the relativistic induced transparency mechanism using linearly polarised laser interaction with foil targe
Externí odkaz: https://doaj.org/article/c8346ad48c544cd1af72ae149959a8b6
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10
Akademický článek
Influences of transversely isotropic rheology and translational diffusion on the stability of active suspensions
Autor: C. R. Holloway, G. Cupples, D. J. Smith, J. E. F. Green, R. J. Clarke, R. J. Dyson
Publikováno v: Royal Society Open Science, Vol 5, Iss 8 (2018)
Suspensions of self-motile, elongated particles are a topic of significant current interest, exemplifying a form of ‘active matter’. Examples include self-propelling bacteria, algae and sperm, and artificial swimmers. Ericksen's model of a transv
Externí odkaz: https://doaj.org/article/756dbec897614b049862075ab3c51c2f
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