Zobrazeno 1 - 10
of 65
pro vyhledávání: '"T. Gronych"'
Publikováno v:
Metrologia. 52:R11-R21
Albeit the utilization of halogenated hydrocarbons in new devices is suppressed gradually, due to the protection of environment, large amounts of them still remain in existing equipment. It is important for metrology to carry out proper leak measurem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a9231eb04b0547140936ce9181c9c648
https://doi.org/10.1088/0026-1394/52/4/r11
https://doi.org/10.1088/0026-1394/52/4/r11
Publikováno v:
Vacuum. 101:377-381
A multi-opening orifice is a device for the primary measurement of gas flows and related vacuum quantities. This device maintains a constant molecular flow regime and thus the possibility to very accurately calculate the conductance from the geometri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a471d6e1bce70e4105d1295484d4477a
https://doi.org/10.1016/j.vacuum.2013.10.014
https://doi.org/10.1016/j.vacuum.2013.10.014
Publikováno v:
Vacuum. 86:1759-1763
Gas flow through an orifice can be determined with high accuracy based only on the geometrical dimensions of the orifice and the upstream and downstream pressures when the flow is purely molecular. An orifice with a number of smaller openings in para
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::489e168dfea95204ccc64fdec5bbf31f
https://doi.org/10.1016/j.vacuum.2012.02.008
https://doi.org/10.1016/j.vacuum.2012.02.008
Autor:
T. Gronych, P. Řepa, L. Peksa, Martin Vičar, F. Staněk, Dominik Pražák, J. Tesař, Z. Krajíček, M. Jeřáb
Publikováno v:
Measurement. 44:1143-1152
Construction of constant-pressure gas flowmeters utilizing directly driven bellows and diaphragm bellows as volume displacers were described in recent decades. They have important advantages: accuracy, reliability, easy operation and maintenance. Dif
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::86b1eda9d0ee6d35d0a29edcc7c4b368
https://doi.org/10.1016/j.measurement.2011.03.008
https://doi.org/10.1016/j.measurement.2011.03.008
Autor:
J. Tesař, Dominik Pražák, P. Řepa, Martin Vičar, Z. Krajíček, F. Staněk, M. Jeřáb, T. Gronych, L. Peksa
Publikováno v:
Vacuum. 85:1047-1051
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.,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9d8d6f5fc1f8f20b6fe0d3d2a403c365
https://doi.org/10.1016/j.vacuum.2011.03.019
https://doi.org/10.1016/j.vacuum.2011.03.019
Publikováno v:
Measurement Science and Technology. 29:095011
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f078973cb9e557f5aa4a6234660d4954
https://doi.org/10.1088/1361-6501/aad1e2
https://doi.org/10.1088/1361-6501/aad1e2
Publikováno v:
ResearcherID
Accurate calibrations of gauges to ever lower pressures (higher vacuum) are increasingly becoming necessary. The calibrations over the entire ultra high vacuum (UHV) range i.e. up to 10−10 Pa are already sometimes demanded by the users of vacuum me
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::35f297eda136ed70ca24307f429afcf4
https://doi.org/10.1007/s12647-009-0010-1
https://doi.org/10.1007/s12647-009-0010-1
Publikováno v:
Metrologia. 45:368-375
The pumping speed of a pump in an orifice flow standard was measured to enable calculation of the effective pumping speed in the calibration chamber. The main problems are as follows. (1) The pumping speed of a pump connected to a chamber of finite s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::75c4c32ccf3becbbd7a25e199dbf302d
https://doi.org/10.1088/0026-1394/45/3/015
https://doi.org/10.1088/0026-1394/45/3/015
Publikováno v:
Metrologia. 45:46-52
A constant pressure gas flowmeter using a directly driven diaphragm bellows as a volume displacer was studied. This flowmeter is perfectly vacuum-sealed, does not contain elastomers and liquids that would prevent outgassing at elevated temperatures a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::409e8827bbeeb0e951608aef227ad32b
https://doi.org/10.1088/0026-1394/45/1/007
https://doi.org/10.1088/0026-1394/45/1/007
Publikováno v:
Vacuum. 82:298-302
Continuous oscillations of the pressure of hydrogen and some other gases were observed in an ultra high vacuum (UHV) apparatus. The oscillations arose progressively during experiments with hydrogen permeation through stainless-steel ion-implanted sam
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8733997c77badd2116b4fd5ae9fcf752
https://doi.org/10.1016/j.vacuum.2007.07.031
https://doi.org/10.1016/j.vacuum.2007.07.031