Enhanced deposition of intense electron beam energy into low Z targets

The interaction between intense electron beam and low Z target has been investigated. Enhanced deposition of the beam energy to the solid target of low Z material is observed from measurments of neutrons and protons produced by the D-D reaction. The yield dependence of neutrons on the beam incident power and the energy of protons indicate anomalous interaction between pinched beam and blow-off plasma. In addition, the measurement of a-particles produced by the P-¹¹B reaction clarifies the influence of the effect of nuclear reaction by accelerated particles. The extent of accelerated beam reaction to thermonuclear reaction is estimated to be less than 6% in D-D case.