Effects of a prepulse on γ-ray radiation produced by a femtosecond laser with only 5-mJ energy

Zhang, P.; He, Jijun; Chen, D. B.; Li, Z. H.; Zhang, Y.; Bian, Jiang; Wang, L.; Li, Z. L.; Feng, Bo; Zhang, X. L.; Zhang, D. X.; Tang, Xiaoping; Zhang, J.

doi:10.1103/physreve.57.r3746

Cited by 73 publications

(48 citation statements)

References 26 publications

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“…This was crucial for the measurement by Sauerbrey (1996) together with the second ingredient of using an extreme contrast ratio against prepulses to avoid relativistic self-focusing as clarified by Zhang et al (1998).…”

Section: Non-thermal Laser Energy Transfer To Targetsmentioning

confidence: 99%

Fusion energy using avalanche increased boron reactions for block-ignition by ultrahigh power picosecond laser pulses

et al. 2015

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Exceptionally high reaction gains of hydrogen protons measured with the boron isotope 11 are compared with other fusion reactions. This is leading to the conclusion that secondary avalanche reactions are happening and confirming the results of high-gain, neutron-free, clean, safe, low-cost, and long-term available energy. The essential basis is the unusual nonthermal block-ignition scheme with picosecond laser pulses of extremely high powers above the petawatt range.

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Section: Non-thermal Laser Energy Transfer To Targetsmentioning

confidence: 99%

Fusion energy using avalanche increased boron reactions for block-ignition by ultrahigh power picosecond laser pulses

et al. 2015

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“…Such plasmas are remarkably different from conventional laboratory plasmas as they are formed rapidly and hydrodynamic expansion is insignificant during the laser pulse. They are 'point' (micron size) sources for both soft and hard x-ray [2,3,4] and gamma ray pulses [5,6]. This aspect has attracted multifaceted research to explore various applications like x-ray lithography and time resolved x-ray diffraction [1].…”

mentioning

confidence: 99%

Role of surface roughness in hard-x-ray emission from femtosecond-laser-produced copper plasmas

et al. 2002

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The hard x-ray emission in the energy range of 30 − 300 keV from copper plasmas produced by 100 fs, 806 nm laser pulses at intensities in the range of 10 15 -10 16 W cm −2 is investigated. We demonstrate that surface roughness of the targets overrides the role of polarization state in the coupling of light to the plasma. We further show that surface roughness has a significant role in enhancing the x-ray emission in the above mentioned energy range.

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“…At laser intensities above I L ∼ 10 14 W/cm 2 various non-linear interactions with pre-formed plasma may significantly increase the charge states and kinetic energy of the ions produced [1]. The necessary preformed plasma can be generated either by a suitable independent pre-pulse, preceding the main laser pulse [2,3], or by the front part of a sufficiently long main pulse (> 100 ps), the rest of which interacts with the self-created plasma [4]. Depending on the laser pulse and plasma parameters, various forms of laser beam self-focusing, filamentation or channeling may occur.…”

Section: Introductionmentioning

confidence: 99%

Experimental studies of interaction of intense long laser pulse with a laser-created Ta plasma

et al. 2006

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Characteristics of ions, emitted from the laser produced plasma, were systematically investigated using high power iodine laser system PALS, operating at 3 ω. A Ta target was irradiated perpendicularly with laser pulse energy 150 J. Changing the laser focus position, not only the laser intensity, but also the length (duration) of laser beam interaction with pre-formed plasma is changing. Self-focusing of laser beam in self-created plasma was proved, moreover with longitudinal structure with a period of ∼ 200 µm.

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Effects of a prepulse on γ-ray radiation produced by a femtosecond laser with only 5-mJ energy

Cited by 73 publications

References 26 publications

Fusion energy using avalanche increased boron reactions for block-ignition by ultrahigh power picosecond laser pulses

Fusion energy using avalanche increased boron reactions for block-ignition by ultrahigh power picosecond laser pulses

Role of surface roughness in hard-x-ray emission from femtosecond-laser-produced copper plasmas

Experimental studies of interaction of intense long laser pulse with a laser-created Ta plasma

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