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beam current
The influence of proton irradiation (energy, 18 MeV; beam current, 300 nA) with doses of 5 × 1014, 1015, and 5 × 1015 cm-2 on samples of SiO2-BaO-based glass coatings is investigated.
      
It was shown that significant steady-state currents (1 to 10% of the electron beam current) were observed only if the thickness of blocking (unirradiated) layer did not exceed 5 μm.
      
It was found that depending on deposition conditions, the resistivity ρ of applied lines varied from 4 × 10-2 to 103 Ω cm, decreasing rapidly with an increase in the electron beam current.
      
The Simulation of a Beam-Plasma Discharge with the Beam Current Exceeding the Limiting Vacuum Current
      
Results are given of simulation of the space-time dynamics of a beam-plasma discharge with the beam current exceeding the limiting vacuum current.
      
A decreased angular divergence or increased ultimate ion-beam current density is achieved by a change in the potential drop in the space charge sheath between the plasma and the ion optics.
      
The source generates broad (50 cm2) slightly diverging (ω/2~3°-5°) ion beams with energies of 300-1000 eV at a beam current density of ~0.5 mA/cm2.
      
The use of a low-impedance vacuum diode at an amplitude of the arriving pulse of 300-400 kV made it possible to significantly increase the beam current (up to ~15 kA) and the corresponding X-radiation intensity.
      
The electron-accelerating voltage, beam current, vacuum-diode impedance, and other parameters are determined after the recovery procedure.
      
The restrictions on the mean cluster-beam current due to cluster-cluster collisions during acceleration in a linear accelerator are considered.
      
A compact nanosecond electron accelerator with an output energy of up to 4000 keV, a pulsed power of 100-180 MW, a beam current of 0.25-1.1 kA, and a pulse energy of 5-7 J is described.
      
A 1.2-MeV Two-Section Continuous Wave Linear Electron Accelerator with 50-mA Average Beam Current
      
A 1.2-MeV compact two-section continuous wave linear electron accelerator with an average beam current of 50 mA and beam power of 60 kW is described.
      
A Continuous-Wave Linear Accelerator with an Output Electron Energy of 600 keV (Average Beam Current of 50 mA)
      
We describe a compact continuous-wave linear accelerator for industrial applications with an output electron energy of 600 keV, average beam current of 50 mA, and average beam power of 30 kW.
      
It is determined that the minimum value of the beam current at which it is still possible to measure its profile is 3 nA.
      
The maximum electron-beam current is 1 A, and the energy is 2-6 keV.
      
The system incorporates commercial multichannel devices for the analog input/output and special-purpose modules of pulsed monitors of the electron-beam current.
      
Its design makes it possible to simultaneously measure the radiation energy and monitor the beam current.
      
The source ensures an argon ion beam current of up to 80 mA at a discharge current and voltage of 1 A and 115 V, respectively, and a pressure of 1.5 × 10-2 Pa in the chamber.
      
 

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