Institute of Metals and Technology, Ljubljana (IMTLJ)
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Kalibracija kvadrupolnega masnega spektrometra za meritve pretoka plinov s plinskimi sunki = Calibration of quadrupole mass spectrometer (QMS) for gas flow measurements by pressure impulsesŠetina, Janez ; Erjavec, BojanKadrupolni masni spektrometri (QMS) so ionizacijski vakuumski merilniki, ki imajo dodan masni filter za določanje sestave plinske mešanice v vakuumskem sistemu. Kot pri vseh ionizacijskih merilnikih ... se tudi pri QMS koeficienti občutljivosti razlikujejo za različne pline, zato moramo za kvantitativne meritve instrument kalibrirati za posamezne pline. Običajno pri kalibraciji QMS določimo kalibracijske faktorje K[spodaj]p za izračun parcialnih tlakov iz izmerjenih ionskih tokov. V našem primeru pa smo potrebovali kalibracijske faktorje za pretok plina. Pri meritvah plinskih pretokov v vakuumskem sistemu je poleg kalibracijskega faktorja za posamezen plin pomembna tudi črpalna hitrost, s katero posamezen plin izčrpavamo iz posode. Za kalibracijo QMS na vakuumskem sistemu za merjenje permeacije plinov in razplinjevanje materialov smo raziskali metodo s plinskimi sunki. S to metodo lahko določimo kalibracijske faktorje KQ za neposreden izračun pretoka plina iz merjenega ionskega toka v QMS. V KQ sta zajeti koeficient občutljivosti spektrometra in efektivna črpalna hitrost. V prispevku bomo opisali metodo in podali rezultate kalibracije, ki smo jo izvršili za pline H2, He, N2, Ar in CO2.Source: Program in knjiga povzetkov = Program and book of abstracts (Str. 127)Type of material - conference contributionPublish date - 2007Language - slovenian, englishCOBISS.SI-ID - 655786
Author
Šetina, Janez |
Erjavec, Bojan
Topics
masni spektrometer |
meritve |
pretok plinov |
mass spectrometer |
calibration |
gas flow
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Database name | Field | Year |
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Šetina, Janez | 04254 |
Erjavec, Bojan | 05673 |
Source: Personal bibliographies
and: SICRIS
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