Nuclear radiation effects on mirrors

1993 ◽  
Author(s):  
Terrence F. Deaton
2009 ◽  
Vol 27 (3) ◽  
pp. 491-496 ◽  
Author(s):  
H. Hora ◽  
G.H. Miley ◽  
N. Azizi ◽  
B. Malekynia ◽  
M. Ghoranneviss ◽  
...  

AbstractEnergy production by laser driven fusion energy is highly matured by spherical compression and ignition of deuterium-tritium (DT) fuel. An alternative scheme is the fast ignition where petawatt (PW)-picosecond (ps) laser pulses are used. A significant anomaly was measured and theoretically analyzed with very clean PW-ps laser pulses for avoiding relativistic self focusing. This permits a come-back of the side-on ignition scheme of uncompressed solid DT, which is in essential contrast to the spherical compression scheme. The conditions of side-on ignition thresholds needed exorbitantly high energy flux densities E*. These conditions are now in reach by using PW-ps laser pulses to verify side-on ignition for DT. Generalizing this to side-on igniting solid state density proton-Boron-11 (HB11) arrives at the surprising result that this is one order of magnitude more difficult than the DT fusion. This is in contrast to the well known impossibility of igniting HB11 by spherical laser compression and may offer fusion energy production with exclusion of neutron generation and nuclear radiation effects with a minimum of heat pollution in power stations and application for long mission space propulsion.


The results of a study to determine the relative resistance of a number of explosives to effeets of low-energy γ -rays will be presented. The data obtained from irradiating the materials at several temperatures by the 0.41 MeV γ -quantum emitted by 198 Au demonstrate that no obvious correlation exists between the radiation resistance of explosives and their thermal stability, mechanical sensitivity or ignition temperature. In view of their well-known explosive behaviour, the resistance of explosives to irradiation decomposition is surprising. In some cases chemical instability during irradiation is detectable with difficulty even at doses of 10 6 r. It is evident from the data as well, that the chemical structures in question exhibit a varied resistance to radiation effects and suggest that resonance properties of certain molecules contribute markedly to radiation resistance.


1963 ◽  
Vol 10 (5) ◽  
pp. 110-117 ◽  
Author(s):  
W. D. Bristow ◽  
B. T. Lowrey ◽  
C. A. Robson ◽  
G. D. Wyers

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