The schematic of the diode chamber, infrared imaging diagnostic (a) and the photo of spiral diode (b): potential electrode (1), grounded electrode (2).
Waveforms of the accelerating voltage, total current in the spiral diode.
Infrared image (a) and the beam energy density distribution in the horizontal section (b).
Cross section of the magnetic induction in the A-K gap of the spiral diode.
Distribution of the magnetic induction along the gap (a) and across the gap (b): with (1) and without (2) taking into account distortion of the magnetic field by the material of the potential electrode. Curve 3 is the calculation by the Biot-Savart ratio.
Waveforms of accelerating voltage (1), the magnetic induction in the A-K gap (2), and the critical magnetic induction (3).
Waveforms of the accelerating voltage (1), transit time of electrons (2), C + ions (3), and protons (4) in the A-K gap for the spiral diode.
The schematic of the measurement of the electron current.
Waveforms of the accelerating voltage and electron current density on the first pulse, measured by three charge collectors.
The dependence of the total beam energy on the total charge carried by the beam (the integral of the total diode current): 1—experimental data for diodes with non-closed electron drift (strip and annular diodes), 2—experimental data for the spiral diode where closed electron drift is possible.
Efficiency of ion beam production for diodes with self-magnetic insulation.
Characteristics of different self-magnetically insulated diodes (CL—ratio of calculated ion to electron current densities; K—efficiency of the diode compared with CL efficiency for certain type of ions).
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