Hotter electron generation in doped clusters

Jha, J.; Krishnamurthy, M.

doi:10.1088/0953-4075/41/4/041002

Cited by 38 publications

(39 citation statements)

References 36 publications

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“…This is the main mechanism for the production of highly charged ions. In laser pulses with a duration of 100-200 fs, charge multiplicities of 12 to 18 were found, see, for example, [1]. Petrov and Davis [2] showed for Xe clusters with 6000 atoms that at the pulse duration of 125 fs, wavelength of 800 nm and laser intensity of 10 16 W/cm 2 , the mean charge multiplicity of atomic ions is Z = 14.…”

Section: Introductionmentioning

confidence: 99%

Electron–ion collision rates in atomic clusters irradiated by femtosecond laser pulses

Moll

Hilse

Schlanges

et al. 2010

J. Phys. B: At. Mol. Opt. Phys.

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To cite this version:M Moll, P Hilse, M Schlanges, Th Bornath, V P Krainov. Electronion collision rates in atomic clusters irradiated by femtosecond laser pulses. Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, 2010, 43 (13) Abstract. In atomic clusters irradiated by femtosecond laser pulses, plasmas with high density and high temperature are created. The heating is mainly caused by inverse Bremsstrahlung, i.e., determined by electron-ion collisions. In the description of the scattering of electrons on noble gas ions in such plasmas, it is important to account for the inner structure of the ions and the screening by the surrounding plasma medium which can be accomplished by using suited model potentials.In a wide parameter range met in experiments, the Born approximation is not applicable. Instead, the electron-ion collision frequency is calculated on the basis of classical momentum transport cross sections. Results are presented for xenon, krypton, and argon ions in different charge states. A comparison of these results to those for the scattering on Coulomb particles with the same charge shows an enhancement of the collision frequency. The Born approximation, however, leads to an overestimation.Electron-ion collision rates in atomic clusters irradiated by femtosecond laser pulses 2

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Section: Introductionmentioning

confidence: 99%

Electron–ion collision rates in atomic clusters irradiated by femtosecond laser pulses

Moll

Hilse

Schlanges

et al. 2010

J. Phys. B: At. Mol. Opt. Phys.

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show abstract

“…(mainly TIFR) [77][78][79][80] Gaseous clusters (nanometer scale aggregates of 10 2 -10 6 atoms) have been heavily investigated in the last decade not only due to their interesting properties but also because they are a phase where one can study locally solid, but globally gaseous kind of response. Interest in their behaviour in intense laser fields began with the pioneering work of Rhodes and coworkers and Ditmire and coworkers.…”

Section: Rare Gas Clusters In Intense Laser Fields and Their Engineeringmentioning

confidence: 99%

Intense, ultrashort light and dense, hot matter

Kumar

2009

Pramana - J Phys

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This article presents an overview of the physics and applications of the interaction of high intensity laser light with matter. It traces the crucial advances that have occurred over the past few decades in laser technology and nonlinear optics and then discusses physical phenomena that occur in intense laser fields and their modeling. After a description of the basic phenomena like multiphoton and tunneling ionization, the physics of plasma formed in dense matter is presented. Specific phenomena are chosen for illustration of the scientific and technological possibilities -simulation of astrophysical phenomena, relativistic nonlinear optics, laser wakefield acceleration, laser fusion, ultrafast real time X-ray diffraction, application of the particle beams produced from the plasma for medical therapies etc. A survey of the Indian activities in this research area appears at the end.

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“…In Ref. [74] the temperature for clusters of r = 5 nm irradiated by 1.3×10 15 W/cm 2 , 100 fs, 800 nm pulses is found to be 130 eV from time-of-flight measurements assuming a Maxwellian distribution. Our model gives a temperature of 61 eV.…”

Section: D Ionization/heating Modelmentioning

confidence: 99%

Characterization of cluster/monomer ratio in pulsed supersonic gas jets

Gao

Shim

Downer

2008

2008 Conference on Lasers and Electro-Optics

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Zhao, who shared happiness and helped me weather the stress and frustration during my PhD life.Finally, I owe much to my parents, Fangjun Gao and Yadi Gong, and my sister, Yangbo Gao, for their endless love and unconditional support throughout my life, especially in the past seven years when I was studying overseas. Xiaohui GaoThe University of Texas at Austin Cluster mass fraction is an elusive quantity to measure, calculate or estimate accurately for pulsed supersonic gas jets typical of intense laser experiments. The optimization of this parameter is critical for transient phasematched harmonic generation in an ionized cluster jet at high laser intensity. We present an in-depth study of a rapid, noninvasive, single-shot optical method of determining cluster mass fraction f c (r,t) at specified positions r within, and at time t after opening the valve of, a high-pressure pulsed supersonic gas jet. A ∼ 2 mJ fs pump pulse ionizes the monomers, causing an immediate drop in the jet's refractive index n jet proportional to monomer density, while simultaneously initiating hydrodynamic expansion of the clusters.The latter leads to a second drop in n jet that is proportional to cluster density and is delayed by ∼ 1 ps. A temporally stretched probe pulse measures the 2-step index evolution in a single shot by frequency domain holography, enabling recovery of f c . We present the theory behind recovery of f c in detail.vii We also present extensive measurements of spatio-temporal profiles f c (r, t) of cluster mass fraction in a high-pressure supersonic argon jet for various values of backing pressure P , and reservoir temperature T .viii

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Hotter electron generation in doped clusters

Cited by 38 publications

References 36 publications

Electron–ion collision rates in atomic clusters irradiated by femtosecond laser pulses

Electron–ion collision rates in atomic clusters irradiated by femtosecond laser pulses

Intense, ultrashort light and dense, hot matter

Characterization of cluster/monomer ratio in pulsed supersonic gas jets

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