On-line measurement of proton beam current in pA range

Vaida Auzelyte, F Andersson, Mikael Elfman, Per Kristiansson, Jan Pallon, Marie Wegdén, Charlotta Nilsson, Natalia Arteaga

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskriftPeer review


A MeV proton beam with a current in the range of fA-nA is usually measured using a secondary beam signal that is dependent on a sample or requires noise-free accurate charge integration in a Faraday cup. We propose a simple on-line beam current measurement setup that can be used to directly measure beam current during ion beam analysis. A fast beam blanker is used to modulate the beam position after the last set of collimator slits in and out of a mini Faraday cup connected to fA-sensitive electrometer. Less than 100 fA current can be measured during an undisturbed irradiation with kHz sampling frequency. The fast, simple and easily controlled current measurement set-up is going to be routinely used for ion beam analysis and modification at the new Lund sub-micron beam line. (c) 2006 Elsevier B.V. All rights reserved.

Bibliografisk information

The information about affiliations in this record was updated in December 2015.
The record was previously connected to the following departments: Nuclear Physics (Faculty of Technology) (011013007)

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  • Subatomär fysik


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