Astrophysics with Intense and Ultra-Intense Lasers “Laser Astrophysics”

Takabe, H.

doi:10.1143/ptps.143.202

Cited by 52 publications

(32 citation statements)

References 86 publications

(118 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…. Electron-positron plasmas are also interesting for astrophysical scenario [10]. Temperatures of about T ∼ 10 MeV, in a laser-generated plasma, would open, furthermore, channels for muon or pion production [11].…”

mentioning

confidence: 99%

“…Relativistic plasmas have some interesting specific features, such as collective plasmon or plasmino excitations [8] with accompanying van Hove singularities [9]. Electron-positron plasmas are also interesting for astrophysical scenario [10]. Temperatures of about T ∼ 10 MeV, in a laser-generated plasma, would open, furthermore, channels for muon or pion production [11].…”

mentioning

confidence: 99%

See 1 more Smart Citation

Gamma flashes from relativistic electron-positron plasma droplets

Mustafa

Kämpfer

2009

Phys. Rev. A

View full text Add to dashboard Cite

Ultra-intense lasers are expected to produce, in near future, relativistic electron-positron plasma droplets. Considering the local photon production rate in complete leading order in quantum electrodynamics (QED), we point out that these droplets are interesting sources of gamma ray flashes. . Electron-positron plasmas are also interesting for astrophysical scenario [10]. Temperatures of about T ∼ 10 MeV, in a laser-generated plasma, would open, furthermore, channels for muon or pion production [11]. While these channels are interesting for their own right (see [12] for another avenue for laser driven particle production), a hot e + e − γ plasma droplet, exploding after the creation process by the enormous thermodynamic pressure, is a source of γ radiation. Such short γ flashes may be of future use in ultra-fast spectroscopic investigations of various kind.In this note, we are going to present estimates of the photon spectrum emerging from a e + e − γ plasma droplet with temperatures in the 10 MeV range. In contrast to often employed particle-in-cell (PIC) simulations (see [3] for a study of the start-up phase of a similarly hot plasma), we base our considerations on results from QED thermo-field theory. The expansion dynamics is treated in a schematic way, as our emphasis is on the photon emission characteristics.The calculation of the local spontaneous photon emission rate from a QED (electron-positron) plasma has been outlined in [13] to complete leading order in elec- * Electronic address: musnhigolam.mustafa@saha.ac.in † Electronic address: b.kaempfer@fzd.de tromagnetic coupling α by including two-loop order. The result, at the heart of our note, may be presented aswhere n F (E γ ) = (exp(E γ /T ) + 1) −1 denotes the Fermi distribution, and the dynamically generated asymptotic mass squared of the electron is m 2 ∞ = 2m 2 th . The thermal mass squared is given by m 2 th = e 2 T 2 /8 with e 2 = 4πα (The considerations apply for T > m e ± which are different from the non-relativistic case where the relevant scales are given by the masses of plasma particles and the temperature [5].) E γ = u · k is a short hand notation for the Lorentz scalar product of the medium's four-velocity u(t, x) and the photon's four-momentum k. This rate includes 2 ↔ 2 processes from one loop [14], viz., Compton scattering and pair annihilation which generate the leading logarithmic contribution (first three terms in (1)). In addition, the rate also includes the inelastic processes [15] from two-loop like bremsstrahlung (fourth term) and offshell pair annihilation (fifth term) with the correct incorporation [13,16] of the Landau-Pomeranchuk-Migdal effect that limits the coherence length of the emitted radiation. A common feature of the latter two processes is that they have off-shell fermion next to the vertex where the photon is emitted, and the virtuality of the fermion becomes very small if the photon is emitted in forward direction. However, contrary to the one-loop diagrams, the singularity is linear instead of logarithmic, and ...

show abstract

mentioning

confidence: 99%

mentioning

confidence: 99%

Gamma flashes from relativistic electron-positron plasma droplets

Mustafa

Kämpfer

2009

Phys. Rev. A

View full text Add to dashboard Cite

show abstract

“…Since the focus of this article is primarily laboratory astrophysics, it is also worth noting that several review articles have been written over the past two decades addressing this subject area as it can be pursued using high-power lasers and Z-pinches. [27][28][29][30][31] In the sections below we review and update several of these areas, specifically in the context of NIF.…”

Section: Science Uses Of Nifmentioning

confidence: 99%

The National Ignition Facility: Ushering in a new age for high energy density science

Moses¹,

Boyd²,

Remington³

et al. 2009

Physics of Plasmas

419

221

View full text Add to dashboard Cite

The National Ignition Facility (NIF) [E. I. Moses, J. Phys.: Conf. Ser. 112, 012003 (2008); https://lasers.llnl.gov/], completed in March 2009, is the highest energy laser ever constructed. The high temperatures and densities achievable at NIF will enable a number of experiments in inertial confinement fusion and stockpile stewardship, as well as access to new regimes in a variety of experiments relevant to x-ray astronomy, laser-plasma interactions, hydrodynamic instabilities, nuclear astrophysics, and planetary science. The experiments will impact research on black holes and other accreting objects, the understanding of stellar evolution and explosions, nuclear reactions in dense plasmas relevant to stellar nucleosynthesis, properties of warm dense matter in planetary interiors, molecular cloud dynamics and star formation, and fusion energy generation.

show abstract

“…The laser astrophysics is not only attractive as a unique field of astrophysics, but also very important for laser fusion research to exchange the achievement in each field. 25) 4.5 Biological Application At post-genomics, studies of the structure and dynamics of protein are very important for understanding phenomena such as protein folding and protein functioning. Structure analysis of reaction intermediates and short-lived conformal states are also interesting themes.…”

Section: Laboratory Astrophysicsmentioning

confidence: 99%

Prospects of High Power Laser Applications

Yamanaka

Shimizu

2002

The Review of Laser Engineering

View full text Add to dashboard Cite

A vast new field of unique and exciting high power laser applications has now opened. The ability to generate high intensity of laser pulse radiation leads to the creation of extreme conditions. Typical performance of laser parameters are the peak power 100 TW, pulse duration 10 fs and pulse energy 1 joule. When the laser pulse concentrates on a target, the following extreme conditions can create never before achieved in the laboratory, the power intensity 10 20 W/cm 2 , electric field 10 11 V/cm, magnetic field 10 9 gauss, temperature 10 10 ˚K, pressure 10 9 bar and acceleration 10 26 cm/s. These advanced laser systems have been accomplished by a new technique chirped pulse amplification and the development of optronics materials. The tabletop lasers are implemented which can deliver the very high power comparable to the large fusion lasers such as NOVA and GEKKO XII. The relativistic regime has been provided by using a PW laser in the new era.

show abstract

Astrophysics with Intense and Ultra-Intense Lasers “Laser Astrophysics”

Cited by 52 publications

References 86 publications

Gamma flashes from relativistic electron-positron plasma droplets

Gamma flashes from relativistic electron-positron plasma droplets

The National Ignition Facility: Ushering in a new age for high energy density science

Prospects of High Power Laser Applications

Contact Info

Product

Resources

About