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Karen Zaven Hatsagortsyan - One of the best experts on this subject based on the ideXlab platform.

  • streaking at high energies with electrons and positrons
    LIGHT AT EXTREME INTENSITIES 2011, 2012
    Co-Authors: Andreas Ipp, Christoph H Keitel, Jorg Evers, Karen Zaven Hatsagortsyan
    Abstract:

    State-of-the-art attosecond metrology deals with the detection and characterization of photon pulses with typical energies up to the hundreds of eV and time resolution of several tens of attoseconds. Such short pulses are used for example to control the motion of electrons on the atomic scale or to measure inner-shell atomic dynamics. The next challenge of time-resolving the inner-nuclear dynamics, transient meson states and resonances requires photon pulses below attosecond duration and with energies exceeding the MeV scale. Here we discuss a detection scheme for time-resolving High-Energy gamma ray pulses down to the zeptosecond timescale. The scheme is based on the concept of attosecond streak imaging, but instead of conversion of photons into electrons in a nonlinear medium, the High-Energy Process of electron-positron pair creation is utilized. These pairs are produced in vacuum through the collision of a test pulse to be characterized with an intense laser pulse, and they acquire additional energy a...

  • streaking at high energies with electrons and positrons
    Physics Letters B, 2011
    Co-Authors: Andreas Ipp, Christoph H Keitel, Jorg Evers, Karen Zaven Hatsagortsyan
    Abstract:

    Abstract A detection scheme for characterizing High-Energy γ -ray pulses down to the zeptosecond timescale is proposed. In contrast to existing attosecond metrology techniques, our method is not limited by atomic shell physics and therefore capable of breaking the MeV photon energy and attosecond time-scale barriers. It is inspired by attosecond streak imaging, but builds upon the High-Energy Process of electron–positron pair production in vacuum through the collision of a test pulse with an intense laser pulse. We discuss necessary conditions to render the scheme feasible in the upcoming Extreme Light Infrastructure laser facility.

  • ultra strong laser pulses streak camera for gamma rays via pair production and quantum radiative reaction
    Proceedings of SPIE, 2011
    Co-Authors: Karen Zaven Hatsagortsyan, Jorg Evers, A Di Piazza, Christoph H Keitel
    Abstract:

    We show that a strong laser pulse combined with a strong x-ray pulse can be employed in a detection scheme for characterizing High-Energy γ-ray pulses down to the zeptosecond timescale. The scheme employs streak imaging technique built upon the High-Energy Process of electron-positron pair production in vacuum through the collision of a test pulse with intense laser pulses. The role of quantum radiation reaction in multiphoton Compton scattering Process and limitations imposed by it on the detection scheme are examined.

Andreas Ipp - One of the best experts on this subject based on the ideXlab platform.

  • streaking at high energies with electrons and positrons
    LIGHT AT EXTREME INTENSITIES 2011, 2012
    Co-Authors: Andreas Ipp, Christoph H Keitel, Jorg Evers, Karen Zaven Hatsagortsyan
    Abstract:

    State-of-the-art attosecond metrology deals with the detection and characterization of photon pulses with typical energies up to the hundreds of eV and time resolution of several tens of attoseconds. Such short pulses are used for example to control the motion of electrons on the atomic scale or to measure inner-shell atomic dynamics. The next challenge of time-resolving the inner-nuclear dynamics, transient meson states and resonances requires photon pulses below attosecond duration and with energies exceeding the MeV scale. Here we discuss a detection scheme for time-resolving High-Energy gamma ray pulses down to the zeptosecond timescale. The scheme is based on the concept of attosecond streak imaging, but instead of conversion of photons into electrons in a nonlinear medium, the High-Energy Process of electron-positron pair creation is utilized. These pairs are produced in vacuum through the collision of a test pulse to be characterized with an intense laser pulse, and they acquire additional energy a...

  • streaking at high energies with electrons and positrons
    Physics Letters B, 2011
    Co-Authors: Andreas Ipp, Christoph H Keitel, Jorg Evers, Karen Zaven Hatsagortsyan
    Abstract:

    Abstract A detection scheme for characterizing High-Energy γ -ray pulses down to the zeptosecond timescale is proposed. In contrast to existing attosecond metrology techniques, our method is not limited by atomic shell physics and therefore capable of breaking the MeV photon energy and attosecond time-scale barriers. It is inspired by attosecond streak imaging, but builds upon the High-Energy Process of electron–positron pair production in vacuum through the collision of a test pulse with an intense laser pulse. We discuss necessary conditions to render the scheme feasible in the upcoming Extreme Light Infrastructure laser facility.

Peter Langguth - One of the best experts on this subject based on the ideXlab platform.

  • Conditioning following powder micronization: influence on particle growth of salbutamol sulfate.
    Drug development and industrial pharmacy, 2003
    Co-Authors: Katharina Brodka-pfeiffer, Heribert Häusler, Peter Grass, Peter Langguth
    Abstract:

    Micronization is a High-Energy Process that induces changes in the crystallinity of materials. As a result, the crystalline structures on the particles' surface are being destroyed and amorphous areas are formed. After micronization of salbutamol sulfate to be used in dry powder inhalers, only small amounts of amorphous material are produced. Nevertheless, even these small amounts can have important effects on the physical stability of the powder. The amorphous state is thermodynamically unstable and tends to convert to the stable, crystalline state. The recrystallization Process of disordered regions on the particles' surface leads to particle growth of milled particles. In this case, bridges of solid material are being formed between the individual particles, which leads to particle growth. This is an undesirable Process, because particles for pulmonary administration are designed to range between 1 and 10 microm in diameter to exert respirative effect. In the present investigation, salbutamol sulfate is micronized by an air jet mill, and the generated products are exposed to different conditions. Thereafter, the best possible conditioning parameters and storage conditions for the micronized salbutamol sulfate are worked out and rated. The aim of this treatise is to demonstrate the importance of conditioning following micronization.

Jorg Evers - One of the best experts on this subject based on the ideXlab platform.

  • streaking at high energies with electrons and positrons
    LIGHT AT EXTREME INTENSITIES 2011, 2012
    Co-Authors: Andreas Ipp, Christoph H Keitel, Jorg Evers, Karen Zaven Hatsagortsyan
    Abstract:

    State-of-the-art attosecond metrology deals with the detection and characterization of photon pulses with typical energies up to the hundreds of eV and time resolution of several tens of attoseconds. Such short pulses are used for example to control the motion of electrons on the atomic scale or to measure inner-shell atomic dynamics. The next challenge of time-resolving the inner-nuclear dynamics, transient meson states and resonances requires photon pulses below attosecond duration and with energies exceeding the MeV scale. Here we discuss a detection scheme for time-resolving High-Energy gamma ray pulses down to the zeptosecond timescale. The scheme is based on the concept of attosecond streak imaging, but instead of conversion of photons into electrons in a nonlinear medium, the High-Energy Process of electron-positron pair creation is utilized. These pairs are produced in vacuum through the collision of a test pulse to be characterized with an intense laser pulse, and they acquire additional energy a...

  • streaking at high energies with electrons and positrons
    Physics Letters B, 2011
    Co-Authors: Andreas Ipp, Christoph H Keitel, Jorg Evers, Karen Zaven Hatsagortsyan
    Abstract:

    Abstract A detection scheme for characterizing High-Energy γ -ray pulses down to the zeptosecond timescale is proposed. In contrast to existing attosecond metrology techniques, our method is not limited by atomic shell physics and therefore capable of breaking the MeV photon energy and attosecond time-scale barriers. It is inspired by attosecond streak imaging, but builds upon the High-Energy Process of electron–positron pair production in vacuum through the collision of a test pulse with an intense laser pulse. We discuss necessary conditions to render the scheme feasible in the upcoming Extreme Light Infrastructure laser facility.

  • ultra strong laser pulses streak camera for gamma rays via pair production and quantum radiative reaction
    Proceedings of SPIE, 2011
    Co-Authors: Karen Zaven Hatsagortsyan, Jorg Evers, A Di Piazza, Christoph H Keitel
    Abstract:

    We show that a strong laser pulse combined with a strong x-ray pulse can be employed in a detection scheme for characterizing High-Energy γ-ray pulses down to the zeptosecond timescale. The scheme employs streak imaging technique built upon the High-Energy Process of electron-positron pair production in vacuum through the collision of a test pulse with intense laser pulses. The role of quantum radiation reaction in multiphoton Compton scattering Process and limitations imposed by it on the detection scheme are examined.

Christoph H Keitel - One of the best experts on this subject based on the ideXlab platform.

  • streaking at high energies with electrons and positrons
    LIGHT AT EXTREME INTENSITIES 2011, 2012
    Co-Authors: Andreas Ipp, Christoph H Keitel, Jorg Evers, Karen Zaven Hatsagortsyan
    Abstract:

    State-of-the-art attosecond metrology deals with the detection and characterization of photon pulses with typical energies up to the hundreds of eV and time resolution of several tens of attoseconds. Such short pulses are used for example to control the motion of electrons on the atomic scale or to measure inner-shell atomic dynamics. The next challenge of time-resolving the inner-nuclear dynamics, transient meson states and resonances requires photon pulses below attosecond duration and with energies exceeding the MeV scale. Here we discuss a detection scheme for time-resolving High-Energy gamma ray pulses down to the zeptosecond timescale. The scheme is based on the concept of attosecond streak imaging, but instead of conversion of photons into electrons in a nonlinear medium, the High-Energy Process of electron-positron pair creation is utilized. These pairs are produced in vacuum through the collision of a test pulse to be characterized with an intense laser pulse, and they acquire additional energy a...

  • streaking at high energies with electrons and positrons
    Physics Letters B, 2011
    Co-Authors: Andreas Ipp, Christoph H Keitel, Jorg Evers, Karen Zaven Hatsagortsyan
    Abstract:

    Abstract A detection scheme for characterizing High-Energy γ -ray pulses down to the zeptosecond timescale is proposed. In contrast to existing attosecond metrology techniques, our method is not limited by atomic shell physics and therefore capable of breaking the MeV photon energy and attosecond time-scale barriers. It is inspired by attosecond streak imaging, but builds upon the High-Energy Process of electron–positron pair production in vacuum through the collision of a test pulse with an intense laser pulse. We discuss necessary conditions to render the scheme feasible in the upcoming Extreme Light Infrastructure laser facility.

  • ultra strong laser pulses streak camera for gamma rays via pair production and quantum radiative reaction
    Proceedings of SPIE, 2011
    Co-Authors: Karen Zaven Hatsagortsyan, Jorg Evers, A Di Piazza, Christoph H Keitel
    Abstract:

    We show that a strong laser pulse combined with a strong x-ray pulse can be employed in a detection scheme for characterizing High-Energy γ-ray pulses down to the zeptosecond timescale. The scheme employs streak imaging technique built upon the High-Energy Process of electron-positron pair production in vacuum through the collision of a test pulse with intense laser pulses. The role of quantum radiation reaction in multiphoton Compton scattering Process and limitations imposed by it on the detection scheme are examined.