Abstract
The design of a Grand-2000 atomic emission spectrometer is considered. The optical efficiency and spectral resolution of a Grand-2000 spectrometer are compared with the corresponding characteristics of a Grand spectrometer with multi-element emission spectrum analyzers based on BLPP-2000 and BLPP-4000 photodetector arrays. The optical efficiencies are compared using the ratio of spectral line intensities recorded on the two spectrometers using the same types of photodetectors. The resolution of the spectrometers (FWHM of the spectral line) is measured using different types of photodetectors. It is shown that, when using BLPP-4000 photodetectors, the resolution of a Grand-2000 spectrometer is twice as large (4 pm), compared to a Grand spectrometer. The optical efficiency of a Grand-2000 spectrometer is 3 – 8 times lower, depending on the wavelength. It is also shown that a Grand-2000 spectrometer with BLPP-2000 photodetector arrays has better optical efficiency in the short-wavelength region compared to a Grand spectrometer with BLPP-4000 photodetector arrays at the same values of the spectral resolution.
Highlights
Äëÿ ñíèæåíèÿ âåðîÿòíîñòè ñïåêòðàëüíûõ íàëîæåíèé ïðè ïðÿìîì àíàëèçå ïîðîøêîâ ãåîëîãè÷åñêèõ ïðîá ìåòîäîì äóãîâîé àòîìíî-ýìèññèîííîé ñïåêòðîìåòðèè ñîçäàí ñïåêòðîìåòð «Ãðàíä-2000» ñ ðàáî÷èì äèàïàçîíîì 190 – 780 íì ñ äâóìÿ ïàðàëëåëüíî ðàáîòàþùèìè ïîëèõðîìàòîðàìè íà îñíîâå ñõåìû Ïàøåíà-Ðóíãå è àíàëèçàòîðàìè ÌÀÝÑ
Öåëü ðàáîòû — ýêñïåðèìåíòàëüíîå îïðåäåëåíèå ñâåòîñèëû è ñïåêòðàëüíîãî ðàçðåøåíèÿ ñïåêòðîìåòðà «Ãðàíä-2000» ñ àíàëèçàòîðàìè ÌÀÝÑ íà îñíîâå ëèíååê ôîòîäåòåêòîðîâ ÁËÏÏ-2000 è ÁËÏÏ-4000
The optical efficiency and spectral resolution of a Grand-2000 spectrometer are compared with the corresponding characteristics of a Grand spectrometer with multi-element emission spectrum analyzers based on BLPP-2000 and BLPP-4000 photodetector arrays
Summary
Äëÿ ñíèæåíèÿ âåðîÿòíîñòè ñïåêòðàëüíûõ íàëîæåíèé ïðè ïðÿìîì àíàëèçå ïîðîøêîâ ãåîëîãè÷åñêèõ ïðîá ìåòîäîì äóãîâîé àòîìíî-ýìèññèîííîé ñïåêòðîìåòðèè ñîçäàí ñïåêòðîìåòð «Ãðàíä-2000» ñ ðàáî÷èì äèàïàçîíîì 190 – 780 íì ñ äâóìÿ ïàðàëëåëüíî ðàáîòàþùèìè ïîëèõðîìàòîðàìè íà îñíîâå ñõåìû Ïàøåíà-Ðóíãå è àíàëèçàòîðàìè ÌÀÝÑ. Öåëü ðàáîòû — ýêñïåðèìåíòàëüíîå îïðåäåëåíèå ñâåòîñèëû è ñïåêòðàëüíîãî ðàçðåøåíèÿ ñïåêòðîìåòðà «Ãðàíä-2000» ñ àíàëèçàòîðàìè ÌÀÝÑ íà îñíîâå ëèíååê ôîòîäåòåêòîðîâ ÁËÏÏ-2000 è ÁËÏÏ-4000. Ïîêàçàíî, ÷òî ñïåêòðîìåòð «Ãðàíä-2000» ñ ëèíåéêàìè ÁËÏÏ-2000 èìååò ïÿòèêðàòíîå ïðåèìóùåñòâî â îòíîøåíèè ñèãíàë-øóì â êîðîòêîâîëíîâîé îáëàñòè ñïåêòðà ïî ñðàâíåíèþ ñî ñïåêòðîìåòðîì «Ãðàíä» ñ ÁËÏÏ-4000, ïðè ýòîì èõ ñïåêòðàëüíûå ðàçðåøåíèÿ ðàâíû.
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