• High Power Laser Science and Engineering
  • Vol. 8, Issue 4, 04000e38 (2020)
Obulkasim Olugh1、2, Zi-Liang Li3, and Bai-Song Xie1、4、*
Author Affiliations
  • 1Key Laboratory of Beam Technology of the Ministry of Education, and College of Nuclear Science and Technology, Beijing Normal University, Beijing100875, China
  • 2Xinjiang Police College, Urumqi830011, China
  • 3School of Science, China University of Mining and Technology, Beijing100083, China
  • 4Beijing Radiation Center, Beijing100875, China
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    Momentum spectra of produced pairs for linear polarization () at in the plane when the rising pulse length is fixed but the falling pulse length becomes shorter with . The chosen parameters are , and , where is the electron mass.
    Fig. 1. Momentum spectra of produced pairs for linear polarization () at in the plane when the rising pulse length is fixed but the falling pulse length becomes shorter with . The chosen parameters are , and , where is the electron mass.
    Same as Figure1 except that the falling pulse length becomes longer with .
    Fig. 2. Same as Figure1 except that the falling pulse length becomes longer with .
    Same as Figure1 except for elliptic polarization, .
    Fig. 3. Same as Figure1 except for elliptic polarization, .
    Same as Figure2 except for elliptic polarization, .
    Fig. 4. Same as Figure2 except for elliptic polarization, .
    Same as Figure1 except for circular polarization, .
    Fig. 5. Same as Figure1 except for circular polarization, .
    Same as Figure 2 except for circular polarization, .
    Fig. 6. Same as Figure 2 except for circular polarization, .
    The number density (in units of ) of pairs produced in differently polarized electric fields for the shorter falling length of the asymmetric pulse shape with . The field parameters are the same as in Figure 1. Here LP, EP and CP with squares, circles and triangles denote the linear , elliptical and circular cases, respectively.
    Fig. 7. The number density (in units of ) of pairs produced in differently polarized electric fields for the shorter falling length of the asymmetric pulse shape with . The field parameters are the same as in Figure 1. Here LP, EP and CP with squares, circles and triangles denote the linear , elliptical and circular cases, respectively.
    Same as Figure 7 except for the elongated falling case with .
    Fig. 8. Same as Figure 7 except for the elongated falling case with .
    ${f}_{\mathrm{max}}\left(\mathbf{q},\infty \right)$ at peak
    $k=1$ $k=0.1$ $k=10$
    $\delta =0$ $29.40\times {10}^{-6}$ $8.28\times {10}^{-4}$ $5.24\times {10}^{-5}$
    $\delta =0.5$ $9.65\times {10}^{-6}$ $7.50\times {10}^{-4}$ $6.36\times {10}^{-5}$
    $\delta =1$ $2.36\times {10}^{-6}$ $6.46\times {10}^{-4}$ $6.38\times {10}^{-5}$
    Table 1. The peak values of the particle distribution function for the typical polarization when the rising pulse length is fixed and the falling pulse length is short and/or elongated. Note that these peaks occur at different values of the momentum .