Measurement of current distribution based on Faraday cup array

A kind of small Faraday cup array used for measuring the intense current distribution was designed. The diameter of the Faraday cup array is 22 mm, and it consists of 5 small Faraday cups. The maximum current density which the array can measure is 38 A/mm2.The precise current density distribution on the anode target was obtained by the array. The result shows that the density on the middle of the target was higher than that on any other part of the target. A weak pinch existed during the diode working time. The uniformity of the electron beam on the target was partial. The current density distribution on the target was radially symmetrical. The experiment result is consistent with theoretical expectation and simulation result.