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Updated: May 20, 2026

Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses
Published on: July 2, 2012
A very sensitive ion collection device for plasma-laser characterization
S Cavallaro1, L Torrisi, M Cutroneo
1Università degli Studi di Catania, Dipartimento di Fisica e Astronomia, Via S. Sofia, 64, 95123 Catania, Italy.
Abstract:
In this paper a very sensitive ion collection device, for diagnostic of laser ablated-target plasma, is described. It allows for reducing down to few microvolts the signal threshold at digital scope input. A standard ion collector is coupled to a transimpedance amplifier, specially designed, which increases data acquisition sensitivity by a gain ≈1100 and does not introduce any significant distortion of input signal. By time integration of current intensity, an amount of charge as small as 2.7 × 10(-2) pC can be detected for photopeak events.
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