Nonstationary electron distribution functions in a laser field

Chichkov, Boris N.; Shumsky, Sergey; Uryupin, S. A.

doi:10.1103/physreva.45.7475

Cited by 52 publications

(28 citation statements)

References 4 publications

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“…The treatment given by Langdon [2] predicts a selfsimilar distribution function with the form in/-=-v [the connection of P to F is displayed below, Eq. (9)]. The e-e collisions do not inhuence the results if eE2Z »Pi(B) .…”

Section: Inverse Bremsstrahlung Heatingmentioning

confidence: 96%

“…(13), but are not yet able to make the shape of the distribution function Maxwellian. 9 Other parameters of Fig. 4 are Z =10, E =1.5X10 V/cm, t =10 sec, T, =55.2 eV, and B =0.406.…”

Section: Inclusion Of Electron-electronmentioning

confidence: 99%

“…Following Balescu [3], we introduce a new set of variables F(u, t)=W (r)P(c, r) . (9) In the new variables the kinetic equation (8) …”

Section: Inverse Bremsstrahlung Heatingmentioning

confidence: 99%

“…In particular, neglecting electronelectron collisions, a self-similar form of the distribution function is predicted, which is analogous to that first found by Langdon. Other very recent contributions to the subject have been given by Ovchinnikov, Silin, and Uryupin [8] and Chichkov, Shumsky, and Uryupin [9].…”

Section: Introductionmentioning

confidence: 99%

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Electron distribution functions in laser-embedded plasmas

1993

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A detailed study is reported concerning the evolution of the electron distribution function for a laserembedded fully ionized plasma, taking into account the inverse bremsstrahlung and the electron-electron (e-e) collisions. Whenever possible, an effort is made to provide an analytic treatment of the problem, which is corroborated by numerical analysis as well. An approximate, analytic self-similar distribution function has been found for the case when e-e collisions are not negligible, and the heating equation has been solved numerically. PACS number(s): 52.40. -w, 52.50.Jm

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Section: Inverse Bremsstrahlung Heatingmentioning

confidence: 96%

“…(13), but are not yet able to make the shape of the distribution function Maxwellian. 9 Other parameters of Fig. 4 are Z =10, E =1.5X10 V/cm, t =10 sec, T, =55.2 eV, and B =0.406.…”

Section: Inclusion Of Electron-electronmentioning

confidence: 99%

“…Following Balescu [3], we introduce a new set of variables F(u, t)=W (r)P(c, r) . (9) In the new variables the kinetic equation (8) …”

Section: Inverse Bremsstrahlung Heatingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electron distribution functions in laser-embedded plasmas

1993

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“…4). Finally, for very strong fields when V E ZV T (t) and the ion Z charge is not particularly large the electronion collisions are no more controlling the EDF shape, and the electron-electron collisions take over restoring the maxwellian shape, with, of course, a completely different temperature as compared with the initial one [15].…”

Section: Account Of the Plasma Influencementioning

confidence: 98%

Influence of a plasma medium on laser assisted radiative recombination

et al. 2004

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The problem of laser assisted radiation recombination, taking into account the influence of the plasma in which the elementary process takes place, is investigated theoretically. Among the reported results, remarkable broadening and enhancement of the X-ray photon emission spectrum is found, provided some conditions are met. First, a sufficiently intense laser field must assist the process. For enhancement, the intensity must be such that the amplitude of the quiver electron velocity be comparable or slightly larger than the electron thermal velocity. For broadening it is important that at the level of the elementary act of recombination several multiphoton channels be open. A judicious compromise between the plasma temperature and the field intensity is necessary to have many effective slow electrons able to absorb large numbers of photons from the assisting laser field to be converted into X-ray photons. Emitted power spectra per steradian and frequency unit of the emitted photon J(ω x ) in a.u. as a function ω x for a Maxwellian EDF, ion charge Z=3, ω L =0.057 a.u., laser intensity I L = 6×10 15 W/cm 2 , different values of plasma temperature: dotted line T =1a.u. and R=7.3; thick line T=1,5 a.u. and R=5.9; thin line T= 2 a.u. and R=5.1

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Laser even harmonics generation by a plasma embedded in a static electric field

2004

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Even order harmonics generation of the laser radiation due to electron-ion collisions in a plasma embedded in a constant electric field is investigated theoretically. Even harmonics are generated because the presence of a static electric field removes the invariance of the electron distribution function under the symmetry operation of velocity direction inversion. Efficiency generation dependencies are investigated vs different significant parameters as: harmonics number; the ratio of the electron quiver velocity to the thermal velocity; the orientation of the constant electric field with respect to the laser radiation electric field and its wavevector. It is shown that in the general case the polarization planes of different even harmonics are different and do not coincide with that of the generating laser radiation.

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Nonstationary electron distribution functions in a laser field

Cited by 52 publications

References 4 publications

Electron distribution functions in laser-embedded plasmas

Electron distribution functions in laser-embedded plasmas

Influence of a plasma medium on laser assisted radiative recombination

Laser even harmonics generation by a plasma embedded in a static electric field

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