Search

Your search keyword '"Shanks, R. P."' showing total 204 results
Start Over Author "Shanks, R. P."
204 results on '"Shanks, R. P."'

1. Laser-driven plasma waves in capillary tubes

Author

Wojda, F., Cassou, K., Genoud, G., Burza, M., Glinec, Y., Lundh, O., Persson, A., Vieux, G., Brunetti, E., Shanks, R. P., Jaroszynski, D., Andreev, N. E., Wahlstrom, C. -G., and Cros, B.

Subjects
Physics - Accelerator Physics, Physics - Plasma Physics
Abstract

The excitation of plasma waves over a length of up to 8 centimeters is, for the first time, demon- strated using laser guiding of intense laser pulses through hydrogen filled glass capillary tubes. The plasma waves are diagnosed by spectral analysis of the transmitted laser radiation. The dependence of the spectral redshift, measured as a function of filling pressure, capillary tube length and incident laser energy, is in excellent agreement with simulation results. The longitudinal accelerating field inferred from the simulations is in the range 1 -10 GV/m.

Published
2009
Full Text
View/download PDF

2. International Colloquium 'Scattering and Scintillation in Radio Astronomy' was held on June 19-23, 2006 in Pushchino, Moscow region, Russia

Author

Shishov, V. I., Coles, W. A., Rickett, B. J., Bird, M. K., Efimov, A. I., Samoznaev, L. N., Rudash, V. K., Chashei, I. V., Plettemeier, D., Spangler, S. R., Tokarev, Yu., Belov, Yu., Boiko, G., Komrakov, G., Chau, J., Harmon, J., Sulzer, M., Kojima, M., Tokumaru, M., Fujiki, K., Janardhan, P., Jackson, B. V., Hick, P. P., Buffington, A., Olyak, M. R., Fallows, R. A., Nechaeva, M. B., Gavrilenko, V. G., Gorshenkov, Yu. N., Alimov, V. A., Molotov, I. E., Pushkarev, A. B., Shanks, R., Tuccari, G., Lotova, N. A., Vladimirski, K. V., Obridko, V. N., Gubenko, V. N., Andreev, V. E., Stinebring, D., Gwinn, C., Lovell, J. E. J., Jauncey, D. L., Senkbeil, C., Shabala, S., Bignall, H. E., Macquart, J. -P., Kedziora-Chudczer, L., Smirnova, T. V., Malofeev, V. M., Malov, O. I., Tyulbashev, S. A., Jessner, A., Sieber, W., and Wielebinski, R.

Subjects
Astrophysics
Abstract

Topics of the Colloquium: a) Interplanetary scintillation b) Interstellar scintillation c) Modeling and physical origin of the interplanetary and the interstellar plasma turbulence d) Scintillation as a tool for investigation of radio sources e) Seeing through interplanetary and interstellar turbulent media Ppt-presentations are available on the Web-site: http://www.prao.ru/conf/Colloquium/main.html, Comment: 20 pages, astrophysical conference

Published
2006

3. VLBI-experiments on research of solar wind plasma

Author

Nechaeva, M. B., Gavrilenko, V. G., Gorshenkov, Y. N., Lipatov, . B. N., Xiang, L., Molotov, I. E., Pushkarev, A. B., Shanks, R., and Tuccari, G.

Subjects
Astrophysics
Abstract

This work devotes to investigations of solar corona and solar wind plasma by the method of radio probing with using of very long baseline interferometry (VLBI). We performed the theoretical calculation of power spectrum of interferometric response to radio source emission, passed through the turbulent medium. Data of theoretical analysis are compared with results of international VLBI experiments on investigations of solar wind plasma. The observations were realized in 1998, 1999, 2000 with participation of radio telescopes, included at Low Frequency VLBI Network (LFVN): Bear Lakes (RT-64, Russia), Puschino (RT-22, Russia), Urumqi (RT-25, China), Noto (RT-32, Italy), Shanghai (RT-25, China) and others. Preprocessing was carried out with using of S2 correlator at Penticton (Canada). Post processing of experimental data was performed at RRI (Russia) and was aimed to obtain value of solar wind velocity and index of spatial spectrum of electron density fluctuations., Comment: 4 pages. 4 figures. Proceedings of the 7th European VLBI Network Symposium held in Toledo, Spain on October 12-15, 2004. Editors: R. Bachiller, F. Colomer, J.-F. Desmurs, P. de Vicente (Observatorio Astronomico Nacional), p. 333-336. Needs evn2004.cls

Published
2004

20. Carbonate and silicate intercomparison materials for cosmogenic 36Cl measurements

Author

Mechernich, S., Dunai, T. J., Binnie, S. A., Goral, T., Heinze, S., Dewald, A., Schimmelpfennig, I., Keddadouche, K., Aumaître, G., Bourlès, D., Marrero, S. M., Wilcken, K., Simon, K., Fink, D., Phillips, F. M., Caffee, M. W., Gregory, L. C., Phillips, R., Freeman, S. P. H. T., Shanks, R. P., Sarıkaya, M. A., Pavetich, S., Rugel, G., Merchel, S., Akçar, N., Yesiyurt, S., Ivy-Ochs, S., and Vockenhuber, C.

Subjects
Round Robin, Consensus values, Accelerator mass spectrometry, Terrestrial cosmogenic nuclides (TCN), Intercomparison material (ICM)
Abstract

Two natural mineral separates, labeled CoCal-N and CoFsp-N, have been prepared to serve as intercomparison material (ICM) for in situ-produced cosmogenic 36Cl and natural chlorine (Clnat) analysis. The sample CoCal-N is derived from calcite crystals in a Namibian lag deposit, while the sample CoFsp-N is derived from a single crystal of alkali-feldspar from a Namibian pegmatite. The sample preparation took place at the University of Cologne and a rotating splitter was used to obtain homogeneous splits of both ICMs. Forty-five measurements of CoCal-N (between 1 and 16 per facility) and forty-four measurements of CoFsp-N (between 2 and 20 per facility) have been undertaken by ten target preparation laboratories measured by seven different AMS facilities. The internal laboratory scatter of the 36Cl concentrations indicate no overdispersion for half of the laboratories and 3.9 to 7.3% (1σ) overdispersion for the others. We show that the CoCal-N and CoFsp-N splits are homogeneous regarding their 36Cl and Clnat concentrations. The grand average (average calculated from the average of each laboratory) yields initial consensus 36Cl concentrations of (3.74 ± 0.10) x 106 at 36Cl/g (CoCal-N) and (2.93 ± 0.07) x 106 at 36Cl/g (CoFsp-N) at 95% confidence intervals. The coefficient of variation is 5.1% and 4.2% for CoCal-N and CoFsp-N, respectively. The Clnat concentration corresponds to the lower and intermediate range of typical rock samples with 0.73 ± 0.18 μg/g in CoCal-N and 73.9 ± 6.8 μg/g in CoFsp-N. We discuss the most relevant points of the sample preparation and measurement and the chlorine concentration calculation to further approach intra-laboratory comparability. We propose to use continuous measurements of the ICMs to provide a valuable quality control for future determination of 36Cl and Clnat concentrations.

Published
2019

24. A tuneable ultra-compact high-power, ultra-short pulsed, bright gamma-ray source based on bremsstrahlung radiation from laser-plasma accelerated electrons.

Author

Cipiccia, S., Wiggins, S. M., Shanks, R. P., Islam, M. R., Vieux, G., Issac, R. C., Brunetti, E., Ersfeld, B., Welsh, G. H., Anania, M. P., Maneuski, D., Lemos, N. R. C., Bendoyro, R. A., Rajeev, P. P., Foster, P., Bourgeois, N., Ibbotson, T. P. A., Walker, P. A., Shea, V. O., and Dias, J. M.

Subjects
BREMSSTRAHLUNG, SYNCHROTRON radiation, GAMMA ray sources, LASER-plasma interactions, PHYSICS
Abstract

The laser driven plasma wakefield accelerator is a very compact source of high energy electrons. When the quasi-monoenergetic beam from these accelerators passes through dense material, high energy bremsstrahlung photons are emitted in a collimated beam with high flux. We show how a source based on this emission process can produce more than 109 photons per pulse with a mean energy of 10 MeV. We present experimental results that show the feasibility of this method of producing high energy photons and compare the experimental results with GEANT4 Montecarlo simulations, which also give the scaling required to evaluate its suitability as method to produce radioisotopes via photo-nuclear reactions or for imaging applications. [ABSTRACT FROM AUTHOR]

Published
2012
Full Text
View/download PDF

25. Orogen-scale uplift in the central Italian Apennines drives episodic behaviour of earthquake faults

Author

Cowie, P. A., Phillips, R. J., Roberts, G. P., McCaffrey, K., Zijerveld, L. J. J., Gregory, L. C., Walker, J. Faure, Wedmore, L. N. J., Dunai, T. J., Binnie, S. A., Freeman, S. P. H. T., Wilcken, K., Shanks, R. P., Huismans, R. S., Papanikolaou, I., Michetti, A. M., Wilkinson, M., Cowie, P. A., Phillips, R. J., Roberts, G. P., McCaffrey, K., Zijerveld, L. J. J., Gregory, L. C., Walker, J. Faure, Wedmore, L. N. J., Dunai, T. J., Binnie, S. A., Freeman, S. P. H. T., Wilcken, K., Shanks, R. P., Huismans, R. S., Papanikolaou, I., Michetti, A. M., and Wilkinson, M.

Abstract

Many areas of the Earth's crust deform by distributed extensional faulting and complex fault interactions are often observed. Geodetic data generally indicate a simpler picture of continuum deformation over decades but relating this behaviour to earthquake occurrence over centuries, given numerous potentially active faults, remains a global problem in hazard assessment. We address this challenge for an array of seismogenic faults in the central Italian Apennines, where crustal extension and devastating earthquakes occur in response to regional surface uplift. We constrain fault slip-rates since -18 ka using variations in cosmogenic Cl-36 measured on bedrock scarps, mapped using LiDAR and ground penetrating radar, and compare these rates to those inferred from geodesy. The Cl-36 data reveal that individual faults typically accumulate meters of displacement relatively rapidly over several thousand years, separated by similar length time intervals when slip-rates are much lower, and activity shifts between faults across strike. Our rates agree with continuum deformation rates when averaged over long spatial or temporal scales ( 10(4) yr; 10(2) km) but over shorter timescales most of the deformation may be accommodated by <30% of the across-strike fault array. We attribute the shifts in activity to temporal variations in the mechanical work of faulting.

Published
2017

26. Orogen-scale uplift in the central Italian Apennines drives episodic behaviour of earthquake faults

Author

Cowie, P. A., primary, Phillips, R. J., additional, Roberts, G. P., additional, McCaffrey, K., additional, Zijerveld, L. J. J., additional, Gregory, L. C., additional, Faure Walker, J., additional, Wedmore, L. N. J., additional, Dunai, T. J., additional, Binnie, S. A., additional, Freeman, S. P. H. T., additional, Wilcken, K., additional, Shanks, R. P., additional, Huismans, R. S., additional, Papanikolaou, I., additional, Michetti, A. M., additional, and Wilkinson, M., additional

Published
2017
Full Text
View/download PDF

27. Irish cardiac society: Annual general meeting at the Ulster Hospital, Dundonald on December 2nd/3rd, 1983.

Author

Walsh, M. J., Barbir, M., MacMahon, B., Kelly, P., Branagan, J. P., Russell, C., Wilson, C., McCloskey, B., Mathewson, Z., Evuns, A., Chivers, C., Salathia, K. S., Mcllmoyle, E. L., Evans, A., Nicholas, J., Cran, G., Barber, J. M., Shanks, R. G., Elwood, H., Boyle, D. McC, Kenny, J., Smyth, P., Timmis, A., Campbell, S., Monaghan, M., Jewitt, D. E., Evans, A. E., Nicholls, D. P., O’Keeffe, D. B., Morton, P., Murtagh, J. G., Scott, M. E., de Buitleir, M., Rowland, E., Krikler, D. M., Dunn, H. M., McComb, J. M., Campbell, N. P. S., Adgey, A. A. J., Brenan, P., Finn, P. J., Horgan, J. J. H., Quigley, P. J., O’Connor, M. K., Gearty, G., McGovern, E., Corcoran, D., Neligan, M. C., Hamilton, J. R. L., Wood, A. E., O’Kane, H. O. J., Cleland, J., Johnson, H., Awadhi, A. Ai, Conroy, R., Mulcahy, R., Duff, Desmond F., Rudd, Jacqueline, Crean, P. A., Ribeiro, P., Rathcliffe, D., Maseri, A., Gearty, G. F., Maurer, B. J., Scott, M., O’Keeffe, B., Murtagh, G., FitzGerald, G. R., Turner, M., Flanagan, M., Donovan, D., Carvill, P., Delaney, L., Laher, M. S., Darby, S., Finucane, J., Devlin, J. G., Ennis, J., Horgan, J., O’Malley, K., Geddes, J. S., Griffin, B., Blake, S., Neligan, M., Maurer, B., Daly, L., Warren-Smith, Kilcoyne B., and Graham, I.

Published
1984
Full Text
View/download PDF

32. Irish Cardiac Society: Proceedings of Annual General Meeting Scientific Section held on Saturday, 28th November, 1981 at the Royal Victoria Hospital, Belfast.

Author

Graham, I., Comerford, D., Cleary, G., Daly, L., Hickey, N., Mulcahy, R., Manon, B. Mac, Bakshi, M., Walsh, M. J., Mcllmoyle, L., Barber, J. M., McBoyle, D., Salathia, K., Evans, A., Cran, G., Elwood, H., Shanks, R., McComb, J. M., McMaster, E. A., Callaghan, T. S., Scott, M. E., Pringle, T. H., Webb, S. W., Adgey, A. A. J., O’Kane, H. O. J., Cleland, J., Murnaghan, Maurice F., O’Keeffe, D. B., Gedes, J. S., Quigley, Peter, Gearty, G. F., Shaw, K. M., Gumbrielle, T. P., Teo, K. K., Smith, P. P., Neylan, D., Devlin, J. G., Horgan, J. H., Doyle, V. M., O’Malley, K., Kelly, J. G., Kenny, J., Daly, K., Bergmari, G., Kerkez, S., Jackson, G., Jewitt, D. E., Fitzgerald, D. J., O’Callaghan, W. G., O’Brien, E. T., O’Malley, K., Horgan, J., Graham, I., O’Donoghue, S., Ronan, G., McFarlane, R., Hickey, N., Comerford, D., and Mulcahy, R.

Published
1982
Full Text
View/download PDF

40. Royal academy of medicine in Ireland section of biological sciences: Proceedings of summer meeting of the section of biological sciences held at the medical biology centre, the queen’s university of Belfast on 23rd & 24th June, 1983

Author

Iggulden, Lesley A., Allen, J. D., Bullock, Caroline G., Clarke, Hilary M., Kirkpatrick, C. T., White, Elizabeth, Donne, B., Andrews, J. F., Gebruers, E. M., Hall, W. J., Harrington, N. M. B., Browne, G. F., Walsh, A., O’regan, R. G., Bradford, A., Sidahmed, A. H., McElnay, J. C., D’arcy, P. F., Lowry, K. G., Dundee, J. W., McAllister, H. G., Armstrong, G. A., McClelland, R. J., Linggard, R., Climax, J., Lenehan, T. J., Lambe, R., Cannon, P., Darragh, A., Atkinson, R. J., Lowry, W. S., Strain, P., Arce, Miguel A. de, Law, Elizabeth, Tomkins, P. T., Carroll, C., Walsh, S., Houghton, J. A., Moore, R. E., Bolger, C., O’dowd, J. F., Orr, D. J., Seigne, J. D., Woods, J. D., Young, V., Morton, Alison J., Goldspink, D. F., Nelson, G. I. C., Silke, B., Verma, S. P., Hussain, M., Taylor, S. H., O’connor, P. C., Leahey, W. J., Kelly, J. G., Shanks, R. G., Loughran, P. G., O’boyle, Kathy M., Waddington, J. L., Molloy, A., Cooney, D., Keenan, A. K., Docherty, J. R., O’malley, K., Salem, S. A. M., McDevitt, D. G., Kisauzi, D. N., Leek, B. F., Lucas, K. St. J., Bruton, J. D., Anwyl, R., McLoughlin, J. V., Rowan, M., McCabe, J., Scholfield, C. N., Lewis, Sheena E. M., Elliott, P., Mirakhur, R. K., Lavery, T. D., Fox, J. S., Carson, Nina A. J., Lewis, M. H. R, Dinsmore, W. W., McMaster, D., Callender, M. E., Buchanan, K. D., Love, A. H. G., Chestnutt, W. N., Pandit, S. K., O’boyle, C., Harris, D., Maher, D., Colleran, Emer, Jamison, J. P., Murdock, M., Clarke, E. W., McGrath, M., and Clark, E. W.

Published
1984
Full Text
View/download PDF

46. Coherent radiation sources based on laser driven plasma waves

Author

Jaroszynski, D. A., primary, Ersfeld, B., additional, Islam, M. R., additional, Brunetti, E., additional, Shanks, R. P., additional, Grant, P. A., additional, Tooley, M. P., additional, Grant, D. W., additional, Gil, D. Reboredo, additional, Lepipas, P., additional, McKendrick, G., additional, Cipiccia, S., additional, Wiggins, S. M., additional, Welsh, G. H., additional, Vieux, G., additional, Chen, S., additional, Aniculaesei, C., additional, Manahan, G. G., additional, Anania, M-P, additional, Noble, A., additional, Yoffe, S. R., additional, Raj, G., additional, Subiel, A., additional, Yang, X., additional, Sheng, Z. M., additional, Hidding, B., additional, Issac, R. C., additional, Cho, M-H., additional, and Hur, M. S., additional

Published
2015
Full Text
View/download PDF

47. Gamma-ray production from resonant betatron oscillations of accelerated electrons in a plasma wakes

Author

Cipiccia, S., additional, Islam, M. R., additional, Ersfeld, B., additional, Welsh, G. H., additional, Brunetti, E., additional, Vieux, G., additional, Yang, X., additional, Wiggins, S. M., additional, Grant, P., additional, Reboredo Gil, D., additional, Grant, D. W., additional, Shanks, R. P., additional, Issac, R. C., additional, Anania, M. P., additional, Maneuski, D., additional, Montgomery, R., additional, Smith, G., additional, Hoek, M., additional, Hamilton, D., additional, Symes, D., additional, Rajeev, P. P., additional, O'Shea, Val, additional, Dias, J. M., additional, Lemos, N. R., additional, and Jaroszynski, D. A., additional

Published
2015
Full Text
View/download PDF

48. Characterization of laser-driven single and double electron bunches with a permanent magnet quadrupole triplet and pepper-pot mask

Author

Manahan, G G, primary, Brunetti, E, additional, Aniculaesei, C, additional, Anania, M P, additional, Cipiccia, S, additional, Islam, M R, additional, Grant, D W, additional, Subiel, A, additional, Shanks, R P, additional, Issac, R C, additional, Welsh, G H, additional, Wiggins, S M, additional, and Jaroszynski, D A, additional

Published
2014
Full Text
View/download PDF

49. An ultrashort pulse ultra-violet radiation undulator source driven by a laser plasma wakefield accelerator

Author

Anania, M. P., primary, Brunetti, E., additional, Wiggins, S. M., additional, Grant, D. W., additional, Welsh, G. H., additional, Issac, R. C., additional, Cipiccia, S., additional, Shanks, R. P., additional, Manahan, G. G., additional, Aniculaesei, C., additional, van der Geer, S. B., additional, de Loos, M. J., additional, Poole, M. W., additional, Shepherd, B. J. A., additional, Clarke, J. A., additional, Gillespie, W. A., additional, MacLeod, A. M., additional, and Jaroszynski, D. A., additional

Published
2014
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results