2016
Investigating the Influence of Combination of Magnetic Field and Various Atmosphere Conditions on LIBS Signal Enhancement
PROCHAZKA, David, Katarína SKOČOVSKÁ, Pavel POŘÍZKA, Jan NOVOTNÝ, Jakub KLUS et. al.Základní údaje
Originální název
Investigating the Influence of Combination of Magnetic Field and Various Atmosphere Conditions on LIBS Signal Enhancement
Autoři
PROCHAZKA, David (203 Česká republika), Katarína SKOČOVSKÁ (203 Česká republika), Pavel POŘÍZKA (203 Česká republika), Jan NOVOTNÝ (203 Česká republika), Jakub KLUS (203 Česká republika), Jozef KAISER (203 Česká republika), Aleš HRDLIČKA (203 Česká republika, domácí) a Karel NOVOTNÝ (203 Česká republika, garant, domácí)
Vydání
2016 Winter Conference on Plasma Spectrochemistry, 2016
Další údaje
Jazyk
angličtina
Typ výsledku
Konferenční abstrakt
Obor
10406 Analytical chemistry
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Kód RIV
RIV/00216224:14740/16:00089399
Organizační jednotka
Středoevropský technologický institut
Klíčová slova anglicky
LIBS; Signal enhancement; magnetic field
Změněno: 15. 2. 2016 15:49, doc. Mgr. Karel Novotný, Ph.D.
Anotace
V originále
Laser-induced breakdown spectroscopy (LIBS) is a method with great potential in numerous applications and with the capability to detect broad spectrum of elements. Despite the improvement in instrumentation, it still lacks the appropriate sensitivity for some elements, such as detection of halogens. One of the possibilities how to improve the limits of detection is using reduced ambient pressure atmosphere. Consequently, allowing the species to be easily excited and then to emit characteristic radiation. However, using low-pressure ambient atmosphere leads to fast expansion of plasma contributing to lower plasma temperature and electron density. In this work we propose the utilization of magnetic field in order to confine the plasma plume and thus to increase the plasma temperature, electron density resulting to the detected signal. One of the studied parameters was a plasma size for different combinations of ambient pressures and magnetic fields. Concurrently the influence of pressure and magnetic field on signal and background of selected spectral lines was investigated. Optimization of laser intensity and gate delay was performed for each combination of ambient pressure and magnetic field. Moreover for the optimal conditions was monitored plasma temperature using Saha-Boltzmann plots.
Návaznosti
ED1.1.00/02.0068, projekt VaV |
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