AI Article Synopsis
- A deuterated polystyrene shell target is rapidly heated by a Petawatt laser during the stagnation phase, with optimal timing around 80 +/- 20 picoseconds for increased thermal neutron production.
- The laser illumination enhances neutron output by up to five times while using less than 10% of the energy from the implosion laser.
- The focused PW laser generates high-energy electrons at a narrow angle, effectively heating the core without relying on a cone guide.
Article Abstract
A uniformly imploded deuterated polystyrene (CD) shell target is fast-heated by a Petawatt (PW) laser without cone guide. The best illumination timing is found to be in a narrow region around 80+/-20 picoseconds from the onset of the stagnation phase, where thermal neutrons are enhanced four to five times by the PW laser of energy less than 10% of the implosion laser. The timing agrees with the timings of enhancement of the x-ray emission from the core and reduction of the bremsstrahlung radiation from scattered hot electrons. The PW laser, focused to the critical density point, generates the energetic electrons within as narrow an angle as 30 degrees , which then heats the imploded CD shell to enhance thermal neutrons. These results first demonstrate that the PW laser directly heats the imploded core without any conelike laser guide.
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| http://dx.doi.org/10.1103/PhysRevE.71.016403 | DOI Listing |
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Petawatt-laser direct heating of uniformly imploded deuterated-polystyrene shell target.
Phys Rev E Stat Nonlin Soft Matter Phys
January 2005
Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan.
Article Synopsis
- A deuterated polystyrene shell target is rapidly heated by a Petawatt laser during the stagnation phase, with optimal timing around 80 +/- 20 picoseconds for increased thermal neutron production.
- The laser illumination enhances neutron output by up to five times while using less than 10% of the energy from the implosion laser.
- The focused PW laser generates high-energy electrons at a narrow angle, effectively heating the core without relying on a cone guide.
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