Laser Atomic Emission Spectrometer with Achromatic Optical System

E S Voropay,A E Radko,M P Samtsov,K F Ermalitskaia,I M Gulis,D S Tarasau,A A Kirsanov,K A Shevchenko,A P Zajogin

doi:10.1007/s10812-021-01215-2

E S Voropay, A E Radko + Show 7 more

Open Access

https://doi.org/10.1007/s10812-021-01215-2

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Abstract

A laser atomic emission multichannel spectrometer (LAEMS) with an achromatic optical configuration is developed for research and educational purposes. The new spectrometer fits all the requirements for equipment for laser atomic emission spectroscopy, and has a number of advantages owing to the features of the design and technical characteristics of its components. The excitation source for the spectrometer includes two Nd:YAG lasers pumped by semiconductor laser diode arrays with a controllable energy (from 0 to 100 mJ) and interval between between pulses (from 1 to 100 μs), and an average pulse duration of ≈15 ns. The LAEMS provides for studies in both a single pulse and a double pulse laser ablation regime and excitation of emission spectra. Double pulse laser ablation on the LAEMS provides a substantial (up to a factor of 10) increase in the analytic signal with a negligible (1.5–2 times) increase in surface damage.

Highlights

Over the last two decades, laser atomic emission spectroscopy has been one of the most rapidly developing and widely used methods for qualitative and quantitative elemental analysis of objects [1,2,3]
A number of scientific studies have been devoted to the use of doubled laser pulses (DLP), separated by microsecond intervals between pulses, as the source for laser ablation of matter and spectral excitation
It has been shown that the transition from single- to double-pulse laser ablation for a fixed total energy and power of the radiation yields a manifold increase in the analytic signal, which can reduce the error in quantitative analysis [4, 7, 11]