High performance charge-state resolving ion energy analyzer optimized for intense laser studies on low-density cluster targets.
We report on a versatile ion analyzer which is capable to resolve ion charge states and energies with a resolution of E/ΔE = 100 at 75 keV/nucleon. Charge states are identified by their characteristic deflection in a magnetic field, whereas the ion energies are independently determined by a time-of-flight measurement. To monitor the signals a delay-line detector 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 showing charge-state resolved ion energy spectra from the Coulomb explosion of a low-density target, i.e., silver clusters exposed to intense femtosecond laser pulses.
Institut für Physik, Universität Rostock, 18059 Rostock, Germany.
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D
Komar
Institut für Physik, Universität Rostock, 18059 Rostock, Germany.
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KH
Meiwes-Broer
Institut für Physik, Universität Rostock, 18059 Rostock, Germany.
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J
Tiggesbäumker