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5 results on '"De Nicola S."'

1. EuPRAXIA – a compact, cost-efficient particle and radiation source

Author

Weikum, M. K., primary, Akhter, T., additional, Alesini, P. D., additional, Alexandrova, A. S., additional, Anania, M. P., additional, Andreev, N. E., additional, Andriyash, I., additional, Aschikhin, A., additional, Assmann, R. W., additional, Audet, T., additional, Bacci, A., additional, Barna, I. F., additional, Beaton, A., additional, Beck, A., additional, Beluze, A., additional, Bernhard, A., additional, Bielawski, S., additional, Bisesto, F. G., additional, Brandi, F., additional, Bringer, O., additional, Brinkmann, R., additional, Bründermann, E., additional, Büscher, M., additional, Bussmann, M., additional, Bussolino, G. C., additional, Chance, A., additional, Chanteloup, J. C., additional, Chen, M., additional, Chiadroni, E., additional, Cianchi, A., additional, Clarke, J., additional, Cole, J., additional, Couprie, M. E., additional, Croia, M., additional, Cros, B., additional, Crump, P., additional, Dattoli, G., additional, Delerue, N., additional, Delferriere, O., additional, Delinikolas, P., additional, De Nicola, S., additional, Dias, J., additional, Dorda, U., additional, Fedele, R., additional, Pousa, A. Ferran, additional, Ferrario, M., additional, Filippi, F., additional, Fils, J., additional, Fiore, G., additional, Fonseca, R. A., additional, Galimberti, M., additional, Gallo, A., additional, Garzella, D., additional, Gastinel, P., additional, Giove, D., additional, Giribono, A., additional, Gizzi, L. A., additional, Grüner, F. J., additional, Habib, A. F., additional, Heinemann, T., additional, Hidding, B., additional, Holzer, B. J., additional, Hooker, S. M., additional, Hosokai, T., additional, Hübner, M., additional, Irman, A., additional, Jafarinia, F., additional, Jaroszynski, D. A., additional, Jaster-Merz, S., additional, Joshi, C., additional, Kaluza, M. C., additional, Kando, M., additional, Karger, O. S., additional, Karsch, S., additional, Khazanov, E., additional, Khikhlukha, D., additional, Knetsch, A., additional, Kocon, D., additional, Koester, P., additional, Kononenko, O., additional, Korn, G., additional, Kostyukov, I., additional, Kruchinin, K., additional, Labate, L., additional, Lechner, C., additional, Leemans, W. P., additional, Lehrach, A., additional, Li, F. Y., additional, Li, X., additional, Libov, V., additional, Lifschitz, A., additional, Litvinenko, V., additional, Lu, W., additional, Lundh, O., additional, Maier, A. R., additional, Malka, V., additional, Manahan, G. G., additional, Mangles, S. P. D., additional, Marchetti, B., additional, Marocchino, A., additional, de la Ossa, A. Martinez, additional, Martins, J. L., additional, Mason, P., additional, Massimo, F., additional, Mathieu, F., additional, Maynard, G., additional, Mazzotta, Z., additional, Mehrling, T. J., additional, Molodozhentsev, A. Y., additional, Mostacci, A., additional, Müller, A. S., additional, Murphy, C. D., additional, Najmudin, Z., additional, Nghiem, P. A. P., additional, Nguyen, F., additional, Niknejadi, P., additional, Osterhoff, J., additional, Papadopoulos, D., additional, Patrizi, B., additional, Petrillo, V., additional, Pocsai, M. A., additional, Poder, K., additional, Pompili, R., additional, Pribyl, L., additional, Pugacheva, D., additional, Romeo, S., additional, Rajeev, P. P., additional, Conti, M. Rossetti, additional, Rossi, A. R., additional, Rossmanith, R., additional, Roussel, E., additional, Sahai, A. A., additional, Sarri, G., additional, Schaper, L., additional, Scherkl, P., additional, Schramm, U., additional, Schroeder, C. B., additional, Schwindling, J., additional, Scifo, J., additional, Serafini, L., additional, Sheng, Z. M., additional, Silva, L. O., additional, Silva, T., additional, Simon, C., additional, Sinha, U., additional, Specka, A., additional, Streeter, M. J. V., additional, Svystun, E. N., additional, Symes, D., additional, Szwaj, C., additional, Tauscher, G., additional, Terzani, D., additional, Thompson, N., additional, Toci, G., additional, Tomassini, P., additional, Torres, R., additional, Ullmann, D., additional, Vaccarezza, C., additional, Vannini, M., additional, Vieira, J. M., additional, Villa, F., additional, Wahlström, C. -G., additional, Walczak, R., additional, Walker, P. A., additional, Wang, K., additional, Welsch, C. P., additional, Wolfenden, J., additional, Xia, G., additional, Yabashi, M., additional, Yu, L., additional, Zhu, J., additional, and Zigler, A., additional

Published
2019
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3. Self consistent nonlinear transverse quantum dynamics of a cold relativistic electron beam in a magnetized plasma.

Author

Fedele, R., Tanjia, F., De Nicola, S., Jovanovic, D., and Shukla, P. K.

Subjects
SELF-consistent field theory, NONLINEAR theories, QUANTUM theory, ELECTRON beams, MAGNETIZATION, PLASMA gases, POSITRON beams
Abstract

A relativistic electron/positron beam travelling in a cold plasma in the overdense regime n0>nb is the driver of large amplitude plasma oscillations that are generated by the Plasma Wake Field excitation. The beam experiences the 3D effects of the wake field that it has produced by itself (self interaction). In the long beam limit, the transverse effects due to the self interaction (f.i., self focusing/defocusing) are dominant compared to the longitudinal ones. Here, ignoring the longitudinal beam dynamics, a theoretical investigation of the quantum transverse beam motion is carried out when a relativistic electron/positron beam is travelling along an external magnetic field. This is done by adopting a fluid model of a magnetized plasma describing the Plasma Wake Field excitation driven by the beam density and current. On the other hand, taking into account the quantum nature of the single particle of the beam, it is shown that the transverse electron/positron dynamics is governed by a 2D Schrödinger equation in the form of the Gross-Pitaevskii equation. The latter accounts for the collective effects due to both the plasma wake field and the external magnetic field. The above set of equations governing the beam-plasma system (i.e., fluid plus 2D Schrödinger equations), is then reduced to a pair of coupled equations that can be thought as a quantum Zakharov system, leading in general to a 2D nonlocal and nonlinear Schrödinger equation. In the weakly focussed regime, the analysis of this equation is carried out, both analytically and numerically. Remarkably, the existence of quantum beam vortices is shown and the conditions for the self focusing and collapse that include the quantum nature of the beam particles are discussed. [ABSTRACT FROM AUTHOR]

Published
2012
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4. Soliton solutions of the 3D Gross-Pitaevskii equation by a potential control method.

Author

Fedele, R., Eliasson, B., Haas, F., Shukla, P. K., Jovanovic, D., and De Nicola, S.

Subjects
SOLITONS, GROSS-Pitaevskii equations, CONTROL theory (Engineering), POTENTIAL theory (Physics), BOSE-Einstein condensation, ELECTRONIC excitation, DYNAMICS, MATHEMATICAL physics
Abstract

We present a class of three-dimensional solitary waves solutions of the Gross-Pitaevskii (GP) equation, which governs the dynamics of Bose-Einstein condensates (BECs). By imposing an external controlling potential, a desired time-dependent shape of the localized BEC excitation is obtained. The stability of some obtained localized solutions is checked by solving the time-dependent GP equation numerically with analytic solutions as initial conditions. The analytic solutions can be used to design external potentials to control the localized BECs in experiment. [ABSTRACT FROM AUTHOR]

Published
2010
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5. Modulational Instability of Cylindrical and Spherical NLS Equations. Statistical Approach.

Author

Grecu, A. T., De Nicola, S., Fedele, R., Grecu, D., and Visinescu, Anca

Subjects
*DISPERSION relations, *NUCLEAR physics, *FOURIER transforms, *FOURIER analysis, *LORENTZ force
Abstract

The modulational (Benjamin-Feir) instability for cylindrical and spherical NLS equations (c/s NLS equations) is studied using a statistical approach (SAMI). A kinetic equation for a two-point correlation function is written and analyzed using the Wigner-Moyal transform. The linear stability of the Fourier transform of the two-point correlation function is studied and an implicit integral form for the dispersion relation is found. This is solved for different expressions of the initial spectrum (δ-spectrum, Lorentzian, Gaussian), and in the case of a Lorentzian spectrum the total growth of the instability is calculated. The similarities and differences with the usual one-dimensional NLS equation are emphasized. [ABSTRACT FROM AUTHOR]

Published
2010
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