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43 Newest Publications about the topic vacuum systems

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Präventivwartung und Wartungsintervalle von Vakuumpumpen

08-Jun-2017 | Heinz Barfuss, Vakuum in Forschung und Praxis, 2017

Zusammenfassung Im Privatleben gehören gewisse Wartungsarbeiten z. B. am PKW oder Motorrad aufgrund der erforderlichen Mobilität und Flexibilität in der Arbeitswelt zu den alltäglichen Dingen. Präventivwartung und Einhaltung der vorgeschlagenen Wartungs‐ und Revisionsintervalle der ...

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Hydrogen Addition for Centimeter-Sized Monolayer Tungsten Disulfide Continuous Films by Ambient Pressure Chemical Vapor Deposition

15-May-2017 | Yuewen Sheng; Haijie Tan; Xiaochen Wang; Jamie H. Warner, Chemistry of Materials, 2017

Monolayer tungsten disulfide (WS2) offers great prospects for use in optoelectronic devices due to its direct bandgap and high photoluminescence intensity. Here, we show how the controlled addition of hydrogen into the chemical vapor deposition growth of WS2 can lead to the formation of ...

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Deposition of Copper Oxide Coatings With an Atmospheric Pressure Plasma Source: I − Characterization of the Plasma

21-Jul-2016 | Johannes Gruenwald, Katja Fricke, Maik Fröhlich, Martin Polak, Plasma Processes and Polymers, 2016

Metal oxide coatings have a variety of applications in industrial processes. As some of them have bio‐sensitive properties there is growing interest for their use in medical applications as well. Thus, the development of suitable deposition techniques is of major importance for these purposes. ...

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Vakuumsysteme für die mobile Analytik

01-Jun-2016 | Heinz Barfuss, Vakuum in Forschung und Praxis, 2016

Abstract Steigende Umweltbelastungen und verschärfte Umweltauflagen, zunehmende weltweite Verschlechterung der Sicherheitslage durch Sprengstoffanschläge, Drogentransport und ‐missbrauch, genauere Vorhersage von möglichen Naturkatastrophen wie z. B. Vulkanausbrüchen, Bewertung von ...

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Entwicklung eines Ionisationsmanometers mit Feldemitterkathode

06-Aug-2015 | Marcel Lotz, Stefan Wilfert, Oliver Kester, Vakuum in Forschung und Praxis, 2015

Abstract Die Messung von UHV‐ oder gar XHV‐Drücken in Tieftemperatur‐Vakuumsystemen stellt seit jeher ein messtechnisches Problem dar. Prinzipiell lassen sich zwar konventionelle Ionisationsmanometer vom Glühkathodentyp in kryogenen Vakuumumgebungen einsetzen, allerdings handelt man sich ...

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DLSR design and plans: an international overview

03-Sep-2014 | Robert Hettel, Journal of Synchrotron Radiation, 2014

It has been known for decades that the emittance of multi‐GeV storage rings can be reduced to very small values using multi‐bend achromat (MBA) lattices. However, a practical design of a ring having emittance approaching the diffraction limit for multi‐keV photons, i.e. a diffraction‐limited ...

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Conductance of slot channels formed by cylindrical walls

06-Aug-2013 | Sergey Salikeev, Aleksey Burmistrov, Mikhail Bronshtein, Marina Fomina, Vakuum in Forschung und Praxis, 2013

Abstract Gas flow through channels formed by cylindrical walls in molecular gas flow regime is considered in this work. Ex‐ perimentally obtained conductance of three types of channels in a wide pressure range is presented. Conductance in molecular flow regime is specified. Test particle Monte ...

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Simultaneous Analysis of Noble Gases, Sulfur Hexafluoride, and Other Dissolved Gases in Water

18-Jul-2013 | Matthias S. Brennwald; Markus Hofer; Rolf Kipfer, Environmental Science & Technology, 2013

We developed an analytical method for the simultaneous measurement of dissolved He, Ne, Ar, Kr, Xe, SF6, N2, and O2 concentrations in a single water sample. The gases are extracted from the water using a head space technique and are transferred into a vacuum system for purification and separation ...

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Modification of disposable screen‐printed carbon electrode surfaces with conductive electrospun nanofibers for biosensor applications

02-Jul-2013 | Pongpol Ekabutr, Orawan Chailapakul, Pitt Supaphol, Journal of Applied Polymer Science, 2013

ABSTRACT In this work, we describe an alternative approach to the surface modification of screen‐printed carbon electrodes (SPCEs) to fabricate a polypyrrole/polyacrylonitrile multiwall carbon nanotube‐modified screen‐printed carbon electrode (PPy/PAN‐MWCNT/SPCE) using a two‐step process. ...

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Gaseous mixtures in vacuum systems and microfluidics

06-Jun-2013 | Felix Sharipov, Journal of Vacuum Science & Technology B, 2013

In vacuum technology, one deals with gaseous mixtures more frequently than with a single gas, but the information about transport phenomena in mixtures published in the open literature is very poor. Moreover, methods to model mixture flows are more complicated than those for single gas. The aim ...

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