Electromagnetic Processes at High Energies in Oriented Single Crystals

Abstract

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Light dark matter candidates in intense laser pulses I: paraphotons and fermionic minicharged particles

“…Explicit polarization operator approaches to the rate associated with the two-photon reaction may be found in separate papers (see refs. [79] and [82]). In the limit of ξ ǫ ≪ 1 it was obtained that R 1 ∝ ξ 2 ǫ .…”

Advanced Channeling Technologies in Plasma and Laser Fields

“…For more than 50 years of intense studies the basics of crystal channeling for charged beams have been in details defined and described in many scientific papers and books, discussed in a number of conferences and workshops (see, for instance in [3][4][5][6][7][8][9][10][11][12][13][14] ). Presently crystal channeling is known as useful technique for beam steering [15,16], while the related to crystal channeling phenomena are promising candidates for coherent radiation sources [17].…”

An electron-based crystalline undulator

“…Since for an ultra-relativistic particle L d ∝ ε [18][19][20], it seems natural that to increase N d one can consider higher energies. However, at higher energies another limitation appears [2,3,6].…”

“…The coherence of undulator radiation is only possible when the energy loss ∆ε of the particle during its passage through the undulator is small, ∆ε ≪ ε. This statement together with the fact, that for an ultra-relativistic projectile ∆ε is mainly due to radiation [18], leads to the conclusion that L must be much smaller than the radiation length L r , which defines the mean energy loss of an ultra-relativistic particle per unit length (see e.g. [18]).…”

“…This statement together with the fact, that for an ultra-relativistic projectile ∆ε is mainly due to radiation [18], leads to the conclusion that L must be much smaller than the radiation length L r , which defines the mean energy loss of an ultra-relativistic particle per unit length (see e.g. [18]). Therefore, we come to the forth and fifth limitations in (1).…”