Advances in laser-based bremsstrahlung x-ray sources. II. Laser pulse propagation and guiding in nonuniform plasma media in the presence of self-focusing

An analytic Wentzel–Kramers–Brillouin model is presented of Gaussian laser pulse propagation through plasma with a quadratic transverse density profile and an arbitrarily varying, longitudinal density gradient under conditions of nonlinear self-focusing. From these solutions, it is shown that in the absence of nonlinear self-focusing and transverse nonuniformity, for exponential pre-plasma density profiles, the use of a low density coating of the laser target with electron density n0∼11 ncr (e.g., a CH foam of density 35 mg/cm3 for 1-micron laser light) maximizes laser intensity at best focus. Also, under laser and plasma conditions relevant to recent experiments on high-power laser systems, conditions are obtained for a Gaussian laser pulse to propagate stably through the pre-plasma medium. Such conditions would be expected to enhance the production of relativistic electrons from laser-target coupling, providing a possible explanation for the observed increase in MeV photon dose and enabling applications such as laser-based MeV X-ray radiography.

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References

52

[1]

Phys. Plasmas (2011) 10.1063/1.3551738

[2]

Phys. Plasmas. (2017) 10.1063/1.4983991

[3]

(2019)

[4]

Phys. Rev. Lett. (1996) 10.1103/physrevlett.77.75

[5]

IEEE J. Quantum Electron. (1997) 10.1109/3.641310

[6]

Rev. Sci. Instrum. (1999) 10.1063/1.1149442

[7]

Appl. Phys. Lett. (2002) 10.1063/1.1464221

[8]

J. Radiol. Prot. (2006) 10.1088/0952-4746/26/3/002

[9]

Radiat. Prot. Dosim. (2006) 10.1093/rpd/nci383

[10]

New J. Phys. (2007) 10.1088/1367-2630/9/2/023

[11]

Phys. Plasmas (2009) 10.1063/1.3067825

[12]

Phys. Plasmas (2013) 10.1063/1.4818505

[13]

J. Phys. D–Appl. Phys. (2014) 10.1088/0022-3727/47/32/325201

[14]

Radiat. Prot. Dosim. (2016) 10.1093/rpd/ncv505

[15]

Phys. Plasmas (2017) 10.1063/1.4978493

[16]

Laser Part. Beams (2018) 10.1017/s0263034618000551

[17]

Nat. Commun. (2022) 10.1038/s41467-021-27694-7

[18]

Phys. Plasmas (2024) 10.1063/5.0228834

[19]

"Optimizing MeV photon dose generation in laser-solid interactions via stable beam propagation"

[20]

"In situ target modification for enhanced micro focus laser driven MeV X-ray generation"

[21]

Wolf "Self focusing of laser beams in plasma and semiconductors" (1976)

[22]

Phys. Fluids B (1993) 10.1063/1.860828

[23]

Phys. Plasmas (2013) 10.1063/1.4817019

[24]

J. Geophys. Res. (1996)

[25]

(2011)

[26]

(1988)

[27]

[28]

Hamilton "Aerogels for high-energy-density physics targets" (2023) 10.1007/978-3-030-27322-4_52

[29]

Phys. Rev. Lett. (1974) 10.1103/physrevlett.33.209

[30]

Sov. Phys.-JETP (1956)

[31]

Phys. Rev. A (1990) 10.1103/physreva.41.4463

[32]

IEEE Trans. Plasma Sci. (1993) 10.1109/27.221109

[33]

(2005)

[34]

Phys. Plasmas (2009) 10.1063/1.3081098

[35]

Phys. Fluids (1970) 10.1063/1.1692942

[36]

Phys. Rev. Lett. (1975) 10.1103/physrevlett.35.1001

[37]

Phys. Rev. E (2000) 10.1103/physreve.62.1234

[38]

Phys. Rev. Lett. (2001) 10.1103/physrevlett.87.275002

[39]

Phys. Rev. E (2003) 10.1103/physreve.68.026408

[40]

Laser Part. Beams (2006) 10.1017/s0263034606060459

[41]

Monoenergetic and GeV ion acceleration from the laser breakout afterburner using ultrathin targets

L. Yin, B. J. Albright, B. M. Hegelich et al.

Physics of Plasmas 2007 10.1063/1.2436857

[42]

Phys. Rev. Lett. (2009) 10.1103/physrevlett.103.045002

[43]

Phys. Rev. E (2012) 10.1103/physreve.86.056404

[44]

Nat. Phys. (2012) 10.1038/nphys2390

[45]

Laser-driven ion acceleration from relativistically transparent nanotargets

B M Hegelich, I Pomerantz, L Yin et al.

New Journal of Physics 2013 10.1088/1367-2630/15/8/085015

[46]

Eur. Phys. J. A (2023) 10.1140/epja/s10050-023-01043-2

[47]

Phys. Rev. E (2007) 10.1103/physreve.76.066403

[48]

Phys. Rev. E (2015) 10.1103/physreve.91.051101

[49]

Phys. Plasmas (2008) 10.1063/1.2840133

[50]

(2008)

Showing 50 of 52 references

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Published: Dec 01, 2024
Vol/Issue: 31(12)
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Authors

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B. J. Albright