beam current

beam current

[′bēm ‚kər·ənt]
(electronics)
The electric current determined by the number and velocity of electrons in an electron beam.
References in periodicals archive ?
In the existing ion implanter, the distance between ion generationer and wafer is long and beam current is lost during beam transport with low acceleration, and it takes 10 minutes to process 2E15ions/cm2 for one wafer with 20keV.
5 mA proton beam current to the energy of 2000 MeV.
Line scanning is a special mode of pencil beam scanning (PBS), where the beam is delivered continuously with a constant beam current in each energy layer and the intensity modulation is achieved by varying the scan speed within the energy layer.
Although the effect of the modified space charge is often the dominant factor in determining particle trajectories, in high intensity beams the self-magnetic field generated by the beam current can also be important, and can optionally be included in the simulation.
The beam current should be high enough to enhance the efficiency of beam-wave interaction, but low current density is expected, because a space margin between the beam fringe and the tunnel wall is required.
There are mainly three methods to increase the output power of helix TWT when the design voltage and beam current remain constant.
The beam current density can be written in the form of a sum over moving charge particles as
5) This is partly because of the fact that the 3 km long circumference of the TRISTAN ring would require a powerful LINAC to fill the positron ring with high beam current.
Through the in-lens field emission gun, the SEM delivers [greater than or equal to]200 nA of beam current to the sample.
Applications for PocketPico Picoammeter include: photodiode current and dark current measurement, ion beam monitoring and measurement, SEM and TEM beam current measurement, optical fiber alignment, component, sensor, and device I-V characterization, materials resistance testing, leakage current testing, analog and mixed-signal circuit testing & analysis, teaching labs, product demonstrations, etc.
The amount of electron beam energy required for aseptic levels of sterilization is well understood and can be precisely controlled with digital monitoring of electron beam current and voltage.
The first stage will include the investigations on solid converters, with the beam current of 100 (A, the second stage the investigations with liquid-jet targets with the beam currents of approximately 1 mA.