Hydrodynamic cumulation mechanism caused by quantum shell effects

Kuratov, S.E.; Menshov, I.S.; Igashov, S.Y.; Urvachev, E.M.; Blinnikov, S.I.; Shidlovski, D.S.; Glazyrin, S.I.

Авторы: Kuratov S.E., Menshov I.S., Igashov S.Yu, Urvachev E.M., Blinnikov S.I., Shidlovski D.S., Glazyrin S.I.
Журнал: Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Том: 108
Год издания: 2023
Издательство: American Physical Society
Местоположение издательства: United States
Первая страница: 045203
Последняя страница: 045203
DOI: 10.1103/PhysRevE.108.045203
Аннотация: The computational and theoretical analysis carried out in this article demonstrates the existence of a nontrivialmechanism for the compression of a submicron-sized gas bubble formed by a gas of classical ions and a gasof degenerate electrons. This mechanism fundamentally differs from conventional compression mechanisms.It is shown that taking into account the quantum effect of a large spatial scale in the distribution of electronsqualitatively changes the character of cumulative processes. Because of a large-scale electric field caused byquantum shell effects, the compression process is characterized by the formation of multiple shock waves. Thevalues of gas temperature and pressure achieved during compression occur higher by two orders of magnitudeas compared with the classical adiabatic regime. The analysis is carried out within the framework of thefollowing model: the dynamics of the electron subsystem is described by equations of a quantum electron fluid,while the hydrodynamic approximation is adopted for the ionic subsystem. The large-scale effect is taken intoaccount by means of effective external field acting on electrons. The theoretical analysis carried out within thisapproach clarifies the nature of the cumulative process in the system under consideration; some quantitativecharacteristics obtained with numerical simulation are presented. The possibility of experimental observationof this cumulative mechanism is analyzed. It is suggested that the manifestation of the effect can be observedduring laser compression of a system of submicron targets by measuring the neutron yield
Добавил в систему: Меньшов Игорь Станиславович

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