Details

Autor(en) / Beteiligte

• Higginson, D. P.
• McNaney, J. M.
• Swift, D. C.
• Petrov, G. M.
• Davis, J.
• Frenje, J. A.
• Jarrott, L. C.
• Kodama, R.
• Lancaster, K. L.
• Mackinnon, A. J.
• Nakamura, H.
• Patel, P. K.
• Tynan, G.
• Beg, F. N.

Titel

Production of neutrons up to 18 MeV in high-intensity, short-pulse laser matter interactions

Ist Teil von

• Physics of plasmas, 2011-10, Vol.18 (10), p.100703-100703-4

Ort / Verlag

United States: American Institute of Physics

Erscheinungsjahr

2011

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The generation of high-energy neutrons using laser-accelerated ions is demonstrated experimentally using the Titan laser with 360 J of laser energy in a 9 ps pulse. In this technique, a short-pulse, high-energy laser accelerates deuterons from a CD 2 foil. These are incident on a LiF foil and subsequently create high energy neutrons through the 7 Li(d,xn) nuclear reaction ( Q =15 MeV). Radiochromic film and a Thomson parabola ion-spectrometer were used to diagnose the laser accelerated deuterons and protons. Conversion efficiency into protons was 0.5%, an order of magnitude greater than into deuterons. Maximum neutron energy was shown to be angularly dependent with up to 18 MeV neutrons observed in the forward direction using neutron time-of-flight spectrometry. Absolutely calibrated CR-39 detected spectrally integrated neutron fluence of up to 8×10 8 n sr −1 in the forward direction.