Patent No. DE 102014200907 A1, from 23. 07. 2015 describes and protects construction of outgassing reference samples which are built from permeation element based on elastomeric material and suitable hermetically sealed reservoir. When reservoir is filled with a selected gas or liquid, this penetrates into the elastomeric material and disolves in it. When such sample is placed in the vacuum system the dissolved gas starts to evolve into vacuum with a known value of gas flow rate which simulates outgassing rate of selected gas. Reference sample can be measured by the primary outgassing measurement system, yielding a certified reference value of the outgasing rate. After that the sample can be sent to a user in industry or another laboratory for the measurement in their system. By comparing their results with the certified reference value the industrial outgassing rate measurement facilities can be calibrated or validated. Certified reference samples can be also used in a round robin test for the proficiency testing of systems in different laboratories.
F.32 International patent
COBISS.SI-ID: 1194410The Czech Metrology Institute (CMI) took part and failed to prove equivalence in the Key Comparison CCM.P-K12 of helium leak artefacts (leak rates) into vacuum. After identifying and eliminating the cause of the failure, the Institute of Metals and Technology (IMT) of Slovenia, a successful participant in CCM.P-K12, volunteered to serve as pilot and link in a following bilateral comparison of IMT and CMI that obtained designation CCM.P-K12.1 in June 2012. It was decided to perform the comparison with a glass permeation helium leak artefact at nominally 3 10-11 mol/s (7.4 10-7 mbar L s-1) at 23 °C. Both the laboratory standards took part in CCM.P-K12 and were considered as primary. The comparison measurements were performed in October 2012. CMI proved equivalence both with IMT and with the reference value of the key comparison CCM.P-K12
D.06 Final report on a foreign/international project
COBISS.SI-ID: 1195690Goal of this study was to make samples with well known outgassing rate which can be used as a reference for calibration and validation of different outgassing measurement facilities. Main criteria for selection of suitable material were (i) sufficient solubility of different gases in the material (ii) diffusion constant for different gasses in the range from 1e-8 cm2/s to 1e-6 cm2/s, and (iii) material shall be "clean" and compatible with high vacuum, which means it shall not release volatile organic compounds. Only materials which have sufficient repeatability and reversibility of gas absorption could be used as reference samples. Materials with desired properties can be found among polymers and we selected Viton (FPM-fluoropolymer) as a good candidate for outgassing reference samples. Use of Viton in high vacuum systems down to 1e-7 Pa is well established. Distinctive feature of newly developed reference samples based on Viton material is that they can be reloaded many times and with many gases, and also with mixtures of gases at arbitrary concentration ratios. Gases which do not react chemically with Viton are expected to produce reproducible outgassing rates. This was confirmed in our tests with gases H2, He, Ar, Kr, CH4, N2, O2 and CO.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 1195434Materials and Technologies MiT is a scientific serial publication that publishes original, review scientific papers and technical news in theoretical and applied natural sciences and technologies from the fields of metallic and inorganic materials, polymers, vacuum technology and lately also nanomaterials. MiT has JCR Impact Factor 0.548 (2014) As a member of the editorial board is Janez Šetina responsible for the field of vacuum materials and vacuum technologies.
C.06 Editorial board membership
The workshop was aimed to bring together the principle researchers currently working on the development, characterization and practical applications of various surface coatings and treatment for UHV/XHV applications such as non-evaporable getter (NEG) coatings, low secondary electron yield (SEY) coatings, low outgassing coating and treatments, etc. The event provided an opportunity for the exchange of knowledge and experience of experts from various institutions and industries. The Workshop was organized from 28. Sept. to 1. Oct. 2015. by Accelerator Science and Technology Centre ( STFC Daresbury Laboratory, UK) with support from the Institute of Physics (IoP) and commercial sponsors, and endorsed by the International Union for Vacuum Science, Technique and Applications (IUVSTA). Janez Šetina was member of international organizing committee of this workshop.
B.01 Organiser of a scientific meeting