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In intense, pulsed active detection, a single, intense pulse of radiation is used to induce photofission in fissionable material, increasing its detectability. The Mercury pulsed-power generator was converted to positive polarity (+3.7 MV, 325 kA, 50-ns FWHM) to drive an intense, pulsed radiation source based on the FIGARO active detection concept. The probing radiation source consisted of an ion-beam...
The charged-particle dynamics in self-magnetically pinched diodes are examined with the particle-in-cell code LSP. It is shown that the self-electric and magnetic fields determine the electron angles of incidence on the target which, in turn, determine the angular distribution of the emitted X-rays. At low voltages and currents, the self-magnetic field is negligible and the electron flow is space-charge...
Light-ion ICF requires the development of diodes which can efficiently produce high-brightness ion beams, and which can aim the ions in a narrow cone towards a cm-diameter fusion target or transport-channel. Since candidate ion species span protons to carbon ions, diode behavior must be studied in a range of acceleration voltages (2–8 MV) and impendences (1–10 Ω). NRL has developed a broad experimental...
Protons and deuterons produced in a pinch reflex diode are magnetically focused by the self-magnetic field of the ion current in the diode vacuum region and then focused ballistically in a gas filled drift region. With a flat diode geometry, peak ion powers approaching 1 TW (700 kA at 1.3 MV) have been produced corresponding to a 2/3 conversion efficiency of peak diode current to ion current. Ion...
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