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Pressure optimization of high harmonic generation in a differentially pumped Ar or H2 gas jet.
Sayrac, M; Kolomenskii, A A; Anumula, S; Boran, Y; Hart, N A; Kaya, N; Strohaber, J; Schuessler, H A.
Afiliación
  • Sayrac M; Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843-4242, USA.
  • Kolomenskii AA; Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843-4242, USA.
  • Anumula S; Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843-4242, USA.
  • Boran Y; Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843-4242, USA.
  • Hart NA; Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843-4242, USA.
  • Kaya N; Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843-4242, USA.
  • Strohaber J; Department of Physics, Florida A&M University, Tallahassee, Florida 32307, USA.
  • Schuessler HA; Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843-4242, USA.
Rev Sci Instrum ; 86(4): 043108, 2015 Apr.
Article en En | MEDLINE | ID: mdl-25933842
We experimentally studied the dependence of high harmonic generation in argon and molecular hydrogen on pressure changes in a gas jet that cause variations of the phase matching conditions and absorption. The study was performed at a peak laser intensity of ∼1.5 × 10(14) W/cm(2). To enable measurements over a wide range of pressures, we employed differential pumping with an additional cell (∼20 cm(3) volume) enclosing the gas jet. By increasing the pressure in the gas jet up to a maximum of 1.5 bars with argon or 0.5 bars with hydrogen, we observed an increase in the high harmonic (HH) yield until an optimum pressure of 0.2 bars was reached for Ar, beyond which the output began decreasing. For H2, we observed an increase of the HH output up to the maximum pressure of 0.5 bars. This pressure-dependence study allowed us to achieve a tenfold enhancement in the high harmonic yield at the optimum pressure.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Rev Sci Instrum Año: 2015 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Rev Sci Instrum Año: 2015 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos