Properties of an ultrarelativistic charged particle radiation in a constant homogeneous crossed electromagnetic field

Bogdanov, O.V.; Kazinski, P. O.; Lazarenko, G. Yu.

doi:10.1016/j.aop.2017.03.010

Cited by 4 publications

(7 citation statements)

References 29 publications

(60 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, at a large distance from the radiation point, it seems impossible to record the twisted photons created in this way by the detector with a short base. In accordance with (22), (55), the corresponding wave packets spread in the direction normal to the photon propagation direction with the velocity n ⊥ ∼ γ −1 .…”

Section: Helical Wigglersupporting

confidence: 53%

See 1 more Smart Citation

Probability of radiation of twisted photons by classical currents

2018

View full text Add to dashboard Cite

The general formula for the probability of radiation of a twisted photon by a classical current is derived. The general theory of generation of twisted photons by undulators is developed. It is proved that the probability to record a twisted photon produced by a classical current is equal to the average number of twisted photons in a given state. The general formula for the projection of the total angular momentum of twisted photons with given the energy, the longitudinal projection of momentum, and the helicity is obtained. The symmetry property of the average number of twisted photons produced by a charged particle moving along a planar trajectory is found. The explicit formulas for the average number of twisted photons generated by undulators both in the dipole and wiggler regimes are obtained. It is established that, for the forward radiation of an ideal right-handed helical undulator, the harmonic number n of the twisted photon coincides with its projection of the total angular momentum m. As for the ideal left-handed helical undulator, we obtain that m = −n. It is found that the forward radiation of twisted photons by a planar undulator obeys the selection rule that n + m is an even number. It turns out that the average number of twisted photons produced by the undulator and detected off the undulator axis is a periodic function of m in a certain spectral band of the quantum numbers m. *

show abstract

Section: Helical Wigglersupporting

confidence: 53%

“…These boundary contributions are responsible for the radiation created by a particle when it enters to and exits from the external field (see, e.g., [49][50][51][52][53][54][55]). It is useful to factor out the common multiple from the mode functions…”

Section: Probability Of Radiation Of Twisted Photonsmentioning

confidence: 99%

Probability of radiation of twisted photons by classical currents

2018

View full text Add to dashboard Cite

show abstract

“…Then we can employ the formulas from the preceding sections to describe this radiation. The strength tensor of the electromagnetic field reads as follows (we use the notation borrowed from [98,99,102])…”

Section: Radiation By Charged Particles In the Laser Wavementioning

confidence: 99%

“…It is useful to convert all the quantities to the dimensionless ones using the Compton wavelength as a unit length [(5), [102]]. Then, for example, the laser wave with intensity 10 22 W/cm 2 and photon energy 1.53 eV [103] corresponds to |a| ≈ 1.47 × 10 −4 , |Ω| ≈ 2.99 × 10 −6 .…”

Section: Radiation By Charged Particles In the Laser Wavementioning

confidence: 99%

“…where the principal branch of the square root is taken. The contribution of the boundaries is suppressed since, in the leading order in 1/N , the same contribution but with opposite sign comes from the edge radiation (see for details, e.g., [102,104]). As a result, the contributions of the internal stationary points are only relevant.…”

Section: Radiation By Charged Particles In the Laser Wavementioning

confidence: 99%

See 1 more Smart Citation

Semiclassical probability of radiation of twisted photons in the ultrarelativistic limit

2019

View full text Add to dashboard Cite

The semiclassical general formula for the probability of radiation of twisted photons by ultrarelativistic scalar and Dirac particles moving in the electromagnetic field of a general form is derived. This formula is the analog of the Baier-Katkov formula for the probability of radiation of one plane wave photon with the quantum recoil taken into account. The derived formula is used to describe the radiation of twisted photons by charged particles in undulators and laser waves. Thus, the general theory of undulator radiation of twisted photons and radiation of twisted photons in the nonlinear Compton process is developed with account for the quantum recoil. The explicit formulas for the probability to record a twisted photon are obtained in these cases. In particular, we found that the quantum recoil and spin degrees of freedom increase the radiation probability of twisted photons in comparison with the formula for scalar particles without recoil. In the range of applicability of the semiclassical formula, the selection rules for undulator radiation established in the purely classical framework are not violated. The manifestation of the blossoming out rose effect in the nonlinear Compton process in a strong laser wave with circular polarization and in the wiggler radiation is revealed. Several examples are studied: the radiation of MeV twisted photons by 180 GeV electrons in the wiggler; the radiation of twisted photons by 256 MeV electrons in strong electromagnetic waves produced by the CO 2 and Ti:Sa lasers; and the radiation of MeV twisted photons by 51.1 MeV electrons in the electromagnetic wave generated by the FEL with photon energy 1

show abstract

Radiation-dominated particle and plasma dynamics

Gonoskov

Marklund

2018

Physics of Plasmas

View full text Add to dashboard Cite

We consider the general problem of charged particle motion in a strong electromagnetic field of arbitrary configuration and find a universal behaviour: for sufficiently high field strengths, the radiation losses lead to a general tendency of the charge to move along the direction that locally yields zero lateral acceleration. The relativistic motion along such a direction results in no radiation losses, according to both classical and quantum descriptions of radiation reaction. We show that such a radiation-free direction (RFD) exists at each point of an arbitrary electromagnetic field, while the time-scale of approaching this direction decreases with the increase of field strength. Thus, in the case of a sufficiently strong electromagnetic field, at each point of space, the charges mainly move and form currents along local RFD, while the deviation of their motion from RFD can be calculated in order to account for their incoherent emission. This forms a general description of particle, and therefore plasma, dynamics in strong electromagnetic fields, the latter can be generated by state-of-the-art lasers or in astrophysical environments.The development of state-of-the-art high-intensity laser systems has spurred renewed interest in radiation reaction and its effect on particle dynamics in strong electromagnetic fields (see, e.g., Ref. 1 and references therein). The nature of radiation reaction has been a long-standing issue in the literature [2-4], and the developments over the last decade [5][6][7][8][9] have further clarified various aspects of this effect. Furthermore, particle and plasma dynamics in the presence of significant radiation losses appears as a difficult, but rapidly developing, field for theoretical studies [5,[10][11][12][13][14][15][16][17][18]. The interest to this field has been further increased by the discovery of several somewhat counter-intuitive phenomena, such as straggling [19,20], quenching [21], radiation reaction trapping in traveling waves [22], as well as normal [23] and anomalous [24] radiative trapping in standing waves. Despite continuous efforts on developing analytical approaches [13,15,25], the high degree of nonlinearity in many cases restricts the analysis to qualitative explanations, on the level of cause-andeffect relations, supported by numerical simulations. Therefore general theoretical approaches are needed for building up a more comprehensive picture, useful for developing experimental concepts at upcoming laser facilities [26][27][28][29], where these, and other phenomena due to radiation reaction, can be exploited for creating exotic sources of particles and radiation [30][31][32][33][34], as well as extreme states of matter [35,36].In this paper, we consider particle dynamics in a strong electromagnetic field. We show that for an arbitrary electromagnetic field, there always exists a direction that yields zero transverse acceleration and thus zero value for the dominant term of the relativistic radiation reaction force. We demonstrate that radiation reaction affec...

show abstract

Properties of an ultrarelativistic charged particle radiation in a constant homogeneous crossed electromagnetic field

Cited by 4 publications

References 29 publications

Probability of radiation of twisted photons by classical currents

Probability of radiation of twisted photons by classical currents

Semiclassical probability of radiation of twisted photons in the ultrarelativistic limit

Radiation-dominated particle and plasma dynamics

Contact Info

Product

Resources

About