Stopping, straggling, and blooming of directed energetic electrons in hydrogenic and arbitrary-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Z</mml:mi></mml:math>plasmas

Li, C. K.; Petrasso, R. D.

doi:10.1103/physreve.73.016402

Cited by 23 publications

(18 citation statements)

References 17 publications

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“…8,9 To illustrate this, we consider a 1-MeV electron beam (beam radius r b =10 µm) in a compressed DT target (ρ=300 g/cm 3 and T e =5 keV). The maximum field B max = µ 0 I b /(2πr b ) occurs at the beam surface, where…”

Section: Corementioning

confidence: 99%

“…Thus a criterion for distinguishing the interaction regimes and for illustrating their relative importance 9 is approximately established based on above physics arguments as …”

Section: Corementioning

confidence: 99%

“…In the context of fast ignition, an analytic model 8,9 has recently been developed to address the energy deposition of energetic electrons in the dense core. Country to previous work, 14 this model rigorously treats the effects of the energy loss due to electron scattering and delineates the inextricable relationship of straggling and blooming with enhanced electron energy deposition.…”

Section: The Model Of Electron Energy Depositionmentioning

confidence: 99%

“…Return-current Ohmic heating also plays an important role due to the relatively low plasma temperature. 3 Subsequently, however, as these electrons enter the dense plasma region where n b /n e << 1 and plasma T e ~ keV, 8,9 classical Coulomb collisions will dominate electron transport and energy deposition (as will be discussed in the next section).…”

Section: Introductionmentioning

confidence: 99%

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Energy deposition of MeV electrons in compressed targets of fast-ignition inertial confinement fusion

Petrasso

2006

Physics of Plasmas

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Energy deposition of MeV electrons in dense plasmas, critical for fast ignition in inertial confinement fusion (ICF), is modeled analytically. It is shown that classical stopping and scattering dominate electron transport and energy deposition when the electrons reach the dense plasmas in the cores of compressed targets, while "anomalous" stopping associated with self-generated fields and micro instabilities (suggested by previous simulations) might initially play an important role in the lower-density plasmas outside the dense core. We calculate the energy deposition of MeV electrons in precompressed deuterium-tritium (DT) fast-ignition targets, rigorously treating electron energy loss from scattering, longitudinal straggling and transverse blooming. We demonstrate that, while the initial penetration of electrons in a compressed target results in approximately uniform energy deposition, the latter stages involve mutual couplings of energy loss, straggling, and blooming that lead to enhanced, non-uniform energy deposition. These results are critically important for quantitatively assessing ignition requirements for fast ignition.

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Section: Corementioning

confidence: 99%

“…Thus a criterion for distinguishing the interaction regimes and for illustrating their relative importance 9 is approximately established based on above physics arguments as …”

Section: Corementioning

confidence: 99%

Section: The Model Of Electron Energy Depositionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Energy deposition of MeV electrons in compressed targets of fast-ignition inertial confinement fusion

Petrasso

2006

Physics of Plasmas

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“…It has great potential advantages over conventional ICF, notably in relaxing the requirements of implosion symmetry and hydrodynamic instabilities, leading to higher gains with lower driver energy, which has drawn significant attention worldwide [2][3][4][5][6][7][8][9]. In FI scheme, fast electrons generated via ultraintense (∼10 20 W/cm 2 ) short-pulse (∼ 20 ps) laser interaction with plasmas will transport into the pre-compressed dense core to deposit energy locally, forming the hot spot.…”

Section: Introductionmentioning

confidence: 99%

Kinetic model for energy deposition in fast ignition

Zhang

Zhou

et al. 2013

EPJ Web of Conferences

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Abstract. A kinetic model describing the energy deposition of fast electrons is established by considering both binary collisions and contributions due to collective process. The collision term is exactly simplified by taking into account relativistic effects within the context of fast ignition, and the explicit formulation of relativistic kinetic equation in three-dimensional momentum space is obtained with the help of spherical harmonic expansion. The corresponding numerical code is developed and benchmarked physically. Typical case studies in fast ignition are also presented.

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