title: Collimated electron beam accelerated at 12 kV from a Penning discharge.
abstract: A pulsed electron beam accelerated at 12 kV with a duration of 40 μs per pulse is obtained from a Penning discharge with a hollow anode and two cathodes. The electrons are extracted through a hole in one of the cathodes and focused by a pair of coils. The electron beam has a diameter of a few mm in the cross section, while the beam current reaches peak values of 400 mA, depending on the magnetic field inside the focussing coils. This relatively inexpensive and compact device is suitable for the irradiation of small material samples placed in high vacuum.
authors: Department of Physics, University of Bucharest, 077125 Bucharest, Romania.
authors: D
authors: D
authors: Toader
authors: National Institute for Laser, Plasma and Radiation Physics, 077125 Bucharest, Romania.
authors: M
authors: M
authors: Oane
authors: National Institute for Laser, Plasma and Radiation Physics, 077125 Bucharest, Romania.
authors: C M
authors: CM
authors: Ticoş