About: Dynamic extension - A new principle for a vacuum primary standard for UHV-range (10^(-6)-10^(-10) Pa) calibration of hot cathode ionisation gauges

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About: Dynamic extension - A new principle for a vacuum primary standard for UHV-range (10^(-6)-10^(-10) Pa) calibration of hot cathode ionisation gauges Goto Sponge NotDistinct Permalink

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Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://dx.doi.org/10.1016/j.vacuum.2011.03.019
Description	The main obstacle in the construction of primary vacuum standards for very low pressures - ultra-high vacuum (UHV) - is outgassing from the walls of the apparatus. Thus, principles utilising a higher pumping rate in the calibration chamber, e.g., the pressure ratio technique, seem to be more useful for this range. However, a serious problem is inherent in this method, namely, that the gas in the calibration chamber is not in equilibrium and thus cannot be characterised by a single scalar pressure value, although such a value is then used to evaluate the measurement. This discrepancy can be overcome by using a hot cathode ionisation gauge as a transfer standard calibrated by the dynamic extension method. The dynamic extension method is explained and compared with the pressure ratio technique. The basic conditions for achieving acceptable uncertainty values are considered. The main obstacle in the construction of primary vacuum standards for very low pressures - ultra-high vacuum (UHV) - is outgassing from the walls of the apparatus. Thus, principles utilising a higher pumping rate in the calibration chamber, e.g., the pressure ratio technique, seem to be more useful for this range. However, a serious problem is inherent in this method, namely, that the gas in the calibration chamber is not in equilibrium and thus cannot be characterised by a single scalar pressure value, although such a value is then used to evaluate the measurement. This discrepancy can be overcome by using a hot cathode ionisation gauge as a transfer standard calibrated by the dynamic extension method. The dynamic extension method is explained and compared with the pressure ratio technique. The basic conditions for achieving acceptable uncertainty values are considered. (en)
Title	Dynamic extension - A new principle for a vacuum primary standard for UHV-range (10^(-6)-10^(-10) Pa) calibration of hot cathode ionisation gauges Dynamic extension - A new principle for a vacuum primary standard for UHV-range (10^(-6)-10^(-10) Pa) calibration of hot cathode ionisation gauges (en)
skos:prefLabel	Dynamic extension - A new principle for a vacuum primary standard for UHV-range (10^(-6)-10^(-10) Pa) calibration of hot cathode ionisation gauges Dynamic extension - A new principle for a vacuum primary standard for UHV-range (10^(-6)-10^(-10) Pa) calibration of hot cathode ionisation gauges (en)
skos:notation	RIV/00216208:11320/11:10108233!RIV12-GA0-11320___
http://linked.open...avai/riv/aktivita	P R
http://linked.open...avai/riv/aktivity	P(GA202/09/0893), R
http://linked.open...iv/cisloPeriodika	11
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Řepa, Petr Gronych, Tomáš Vičar, Martin Jeřáb, Martin Peksa, Ladislav
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Karlova v Praze / Matematicko-fyzikální fakulta
http://linked.open...dnocenehoVysledku	195740
http://linked.open...ai/riv/idVysledku	RIV/00216208:11320/11:10108233
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	UHV calibration; Pressure ratio technique; Primary vacuum standard (en)
http://linked.open.../riv/klicoveSlovo	Pressure ratio technique Primary vacuum standard UHV calibration
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[293C7A5C5556]
http://linked.open...i/riv/nazevZdroje	Vacuum
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	5 (xsd:int)
http://linked.open...cetTvurcuVysledku	9 (xsd:int)
http://linked.open...vavai/riv/projekt	Study of the ionization methods for ultrahigh vacuum and extremely high vacuum pressure measurement
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	85
http://linked.open...iv/tvurceVysledku	Gronych, Tomáš Jeřáb, Martin Krajíček, Z. Peksa, Ladislav Prazak, D. Stanek, F. Tesar, J. Vičar, Martin Řepa, Petr
http://linked.open...ain/vavai/riv/wos	000291335900014
issn	0042-207X
number of pages	5 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.vacuum.2011.03.019
http://localhost/t...ganizacniJednotka	11320

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