High performance charge-state resolving ion energy analyzer optimized for intense laser studies on low-density cluster targets

We report on a versatile ionanalyzer which is capable to resolve ioncharge states and energies with a resolution of E/ ΔE = 100 at 75 keV/nucleon.Charge states are identified by their characteristic deflection in amagnetic field, whereas the ion energies are independently determined by atime-of-flight measurement. To monitor the signals a delay-linedetector is used which records ion impact positions and times in each laser shot. Compared to conventional Thomson parabola spectrometers our instrument provides a low background measurement, hence a superior dynamic range. Further features are an improved energy resolution and a significantly increased transmission. We demonstrate the performance by showingcharge-state resolved ion energy spectra from theCoulomb explosion of a low-density target, i.e.,silver clusters exposed to intense femtosecond laser pulses.

Source: Review of Scientific Instruments - October 18, 2016 Category: Physics Authors: D. Komar, K.-H. Meiwes-Broer and J. Tiggesb äumker Source Type: research