Zobrazeno 1 - 10
of 171
pro vyhledávání: '"Schumaker W"'
Autor:
Wood, J. C., Chapman, D. J., Poder, K., Lopes, N. C., Rutherford, M. E., White, T. G., Albert, F., Behm, K. T., Booth, N., Bryant, J. S. J., Foster, P. S., Glenzer, S., Hill, E., Krushelnick, K., Najmudin, Z., Pollock, B. B., Rose, S., Schumaker, W., Scott, R. H. H., Sherlock, M., Thomas, A. G. R., Zhao, Z., Eakins, D., Mangles, S. P. D.
Betatron radiation from laser wakefield accelerators is an ultrashort pulsed source of hard, synchrotron-like x-ray radiation. It emanates from a centimetre scale plasma accelerator producing GeV level electron beams. In recent years betatron radiati
Externí odkaz:
http://arxiv.org/abs/1802.02119
Autor:
Warwick, J. R., Alejo, A., Dzelzainis, T., Schumaker, W., Doria, D., Romagnani, L., Poder, K., Cole, J. M., Yeung, M., Krushelnick, K., Mangles, S. P. D., Najmudin, Z., Samarin, G. M., Symes, D., Thomas, A. G. R., Borghesi, M ., Sarri, G.
The experimental study of the dynamics of neutral electron-positron beams is an emerging area of research, enabled by the recent results on the generation of this exotic state of matter in the laboratory. Electron-positron beams and plasmas are belie
Externí odkaz:
http://arxiv.org/abs/1802.01394
Autor:
Göde, S., Rödel, C., Zeil, K., Mishra, R., Gauthier, M., Brack, F., Kluge, T., MacDonald, M. J., Metzkes, J., Obst, L., Rehwald, M., Ruyer, C., Schlenvoigt, H. -P., Schumaker, W., Sommer, P., Cowan, T. E., Schramm, U., Glenzer, S., Fiuza, F.
Publikováno v:
Phys. Rev. Lett. 118, 194801 (2017)
We report experimental evidence that multi-MeV protons accelerated in relativistic laser-plasma interactions are modulated by strong filamentary electromagnetic fields. Modulations are observed when a preplasma is developed on the rear side of a $\mu
Externí odkaz:
http://arxiv.org/abs/1704.04311
Autor:
Corvan, D. J., Schumaker, W., Cole, J., Ahmed, H., Krushelnick, K., Mangles, S. P. D., Najmudin, Z., Symes, D., Thomas, A. G. R., Yeung, M., Zepf, M., Zhao, Z., Sarri, G.
Synchronising ultra-short (~fs) and focussed laser pulses is a particularly difficult task, as this timescale lies orders of magnitude below the typical range of fast electronic devices. Here we present an optical technique that allows for femtosecon
Externí odkaz:
http://arxiv.org/abs/1409.4243
Autor:
Garland, R. J., Poder, K., Cole, J., Schumaker, W., Doria, D., Gizzi, L. A., Grittani, G., Krushelnick, K., Kuschel, S., Mangles, S. P. D., Najmudin, Z., Symes, D., Thomas, A. G. R., Vargas, M., Zepf, M., Sarri, G.
Laser-wakefield acceleration is a promising technique for the next generation of ultra-compact, high-energy particle accelerators. However, for a meaningful use of laser-driven particle beams it is necessary that they present a high degree of pointin
Externí odkaz:
http://arxiv.org/abs/1407.6979
Autor:
Sarri, G., Corvan, D. J., Schumaker, W., Cole, J., Di Piazza, A., Ahmed, H., Harvey, C., Keitel, C. H., Krushelnick, K., Mangles, S. P. D., Najmudin, Z., Symes, D., Thomas, A. G. R., Yeung, M., Zhao, Z., Zepf, M.
We report on the generation of a narrow divergence ($\theta\approx 2.5$ mrad), multi-MeV ($E_\text{MAX} = 18$ MeV) and ultra-high brilliance ($\approx 2\times10^{19}$ photons s$^{-1}$ mm$^{-2}$ mrad $^{-2}$ 0.1\% BW) $\gamma$-ray beam from the scatte
Externí odkaz:
http://arxiv.org/abs/1407.6980
Autor:
Sarri, G., Poder, K., Cole, J., Schumaker, W., Di Piazza, A., Reville, B., Doria, D., Dromey, B., Gizzi, L., Green, A., Grittani, G., Kar, S., Keitel, C. H., Krushelnick, K., Kushel, S., Mangles, S., Najmudin, Z., Thomas, A. G. R., Vargas, M., Zepf, M.
We report on the laser-driven generation of purely neutral, relativistic electron-positron pair plasmas. The overall charge neutrality, high average Lorentz factor ($\gamma_{e/p} \approx 15$), small divergence ($\theta_{e/p} \approx 10 - 20$ mrad), a
Externí odkaz:
http://arxiv.org/abs/1312.0211
Autor:
Sarri, G., Schumaker, W., Di Piazza, A., Vargas, M., Dromey, B., Dieckmann, M. E., Chvykov, V., Maksimchuk, A., Yanovsky, V., He, Z. H., Hou, B. X., Nees, J. A., Thomas, A. G. R., Keit, C. H., Zepf, M., Krushelnick, K.
The generation of ultra-relativistic positron beams with short duration ($\tau_{e^+} \leq 30$ fs), small divergence ($\theta_{e^+} \simeq 3$ mrad), and high density ($n_{e^+} \simeq 10^{14} - 10^{15}$ cm$^{-3}$) from a fully optical setup is reported
Externí odkaz:
http://arxiv.org/abs/1304.5379
Autor:
Helfrich, J., Vorberger, J., Frydrych, S., Schaumann, G., Ravasio, A., Gauthier, M., Fletcher, L.B., Nagler, B., Barbrel, B., Bachmann, B., Gamboa, E.J., Göde, S., Granados, E., Lee, H.J., Neumayer, P., Schumaker, W., Döppner, T., Falcone, R.W., Glenzer, S.H., Roth, M., Kraus, D.
Publikováno v:
In High Energy Density Physics July 2019 32:56-62
Autor:
Kneip, S., McGuffey, C., Martins, J. L., Bloom, M. S., Chvykov, V., Dollar, F., Fonseca, R., Jolly, S., Kalintchenko, G., Krushelnick, K., Maksimchuk, A., Mangles, S. P. D., Najmudin, Z., Palmer, C. A. J., Phuoc, K. Ta, Schumaker, W., Silva, L. O., Vieira, J., Yanovsky, V., Thomas, A. G. R.
We propose and use a technique to measure the transverse emittance of a laser-wakefield accelerated beam of relativistic electrons. The technique is based on the simultaneous measurements of the electron beam divergence given by $v_{\perp}/v_{\parall
Externí odkaz:
http://arxiv.org/abs/1105.5559