Meny

Javascript is not activated in your browser. This website needs javascript activated to work properly.
Du är här

Effects of laser prepulse on proton generation

Författare:
Publiceringsår: 2010
Språk: Engelska
Sidor: 76-82
Publikation/Tidskrift/Serie: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volym: 620
Nummer: 1
Dokumenttyp: Konferensbidrag
Förlag: Elsevier

Sammanfattning

Low-intensity laser prepulse ( < 10(13) W/cm(2), ns duration) are a major issue in experiments on laser-generation of protons, often limiting the performances of proton sources produced by high-intensity lasers (approximate to 10(19) W/cm(2), ps or fs duration) Several effects are associated to the prepulse and are discussed in this contribution: i) Destruction of thin foil targets by the shock generated by the laser prepulse ii) Creation of preplasma on target front side affecting laser absorption iii) Deformation of target rear side iv) Whole displacement of thin foil targets affecting focusing condition In particular, we show that under oblique high-intensity irradiation and for low prepulse intensities, the proton beam is directed away from the target normal. Deviation is towards the laser forward direction, with an angle that increases with the level and duration of the ASE pedestal. Also, for a given laser pulse, beam deviation increases with proton energy. The observations are discussed in terms of Target Normal Sheath Acceleration, in combination with a laser-controllable shock wave locally deforming the target surface. (C) 2010 Elsevier B.V. All rights reserved.

Disputation

Nyckelord

  • Physics and Astronomy
  • High-pressure
  • Prepulse
  • Laser absorption
  • Proton generation
  • Shock
  • phase diagram

Övriga

COULOMB Workshop on Ions Acceleration with High Power Lasers
2014-06-16
Senigallia, ITALY
Published
Yes
  • ISSN: 0168-9002

Box 117, 221 00 LUND
Telefon 046-222 00 00 (växel)
Telefax 046-222 47 20
lu [at] lu [dot] se

Fakturaadress: Box 188, 221 00 LUND
Organisationsnummer: 202100-3211
Om webbplatsen