Abstract
We have devised an experimental method and apparatus for the simultaneous nondestructive determination of the absolute ion number, ion kinetic energy, and length of bunches of charged particles. We have built and operated a corresponding electronic detector that is based on induced charges and their subsequent low-noise amplification at cryogenic temperatures. We have performed measurements with bunches of low-energy highly charged ions from an electron-beam ion source that show the capability of the methods and their implementation. We discuss requirements for, and applications of, such detectors with a particular view on the obtainable information and their sensitivity.
Highlights
There is substantial interest in particle beam diagnostics that does not destruct or change the properties of the beam in question
The induced ion signal is amplified by the presented two-stage amplifier and recorded by an oscilloscope
Following Eq (8), for the determination of the kinetic energy, the area Ω is calculated by numerical integration of the acquired signal Usignal(t) scitation.org/journal/rsi between times A and B, tB
Summary
There is substantial interest in particle beam diagnostics that does not destruct or change the properties of the beam in question This is true, in particular, for experiments with rare species, when duty cycles are low or when the properties of subsequent particle bunches need to be known individually. In storage-ring physics, Schottky-type electronic pick-ups have been brought forward that make use of the large number of spaced signals induced by a particle bunch which revolves at high rates in the ring. This allows sensitivities on the level of single particles and constitutes valuable diagnostics of beam contents and their mass-changing or charge-changing reactions.. We demonstrate the capability and applicability of these methods with low-energy bunches of highly charged ions of a single ion species and discuss the obtainable sensitivity of corresponding devices
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