Pulsed electron beam emission in space.

Pulsed Electron-Beam Heating

A pulsed, 20 kv electron beam is focussed upon a vapor-deposited thermocouple, and the resulting temperature vs. time response is studied. The experimental data show much scatter, but are consistent with the theoretical prediction that the characteristic thermal response time T is proportional to d , where d is the beam diameter at the thermocouple. From these data, for the soft-glass substrate...

Pulsed electron beam propagation in argon and nitrogen gas mixture

Pulsed Electron Beam Annealing of Arsenic-implantation Damage in Silicon

A SPIRE-300 pulsed electron beam processor has been used t o recrystallize (100) and (111) 15 Si wafers implanted with As (140 keV 10 cm-2). The machine parameters have been selected t o obtain an electron energy deposition profik convenient for melting of the silicon surface 2 down t o 1 J/cm . The best regrawth layer quality and As incorporation wereobtained with electron energy densities in ...

Free-Space Ultrashort Pulsed Beam Propagation Beyond the Paraxial Approximation

Applying the temporal and spatial Fourier transform method, we obtain a nonparaxial pulsed beam solution, which is based on the paraxial pulsed beam solution, where the nonparaxiality is evaluated by using a series of expansions. Specifically, the general lowest-order correction field is given in an integral form. Some special examples, such as the lowest-order correction to the paraxial approx...

Space-charge effects in high brightness electron beam emittance measurements

The measurement of emittance in space-charge dominated, high brightness beam systems is investigated from conceptual, computational, and experimental viewpoints. As the self-field-induced collective motion in the low energy, high brightness beams emitted from photoinjector rf guns are more important in determining the macroscopic beam evolution than thermal spreads in transverse velocity; tradi...