Number of found documents: 588
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Realizace tenkých vrstev na optických komponentech
Budasz, Jiří
2018 - Czech
Zpráva se zabývá realizací tenkých vrstev na optických elementech určených pro funkční vzorky a prototypy. Popisuje rovněž zátěžové testování soustav vrstev na vzorcích. The report describes the realisation of the thin films coatings at the optical elements used for prototyping. It involves the testing of the coatings at sample substrates as well. Keywords: High reflective coatings; testing; laser Available at various institutes of the ASCR
Realizace tenkých vrstev na optických komponentech

Zpráva se zabývá realizací tenkých vrstev na optických elementech určených pro funkční vzorky a prototypy. Popisuje rovněž zátěžové testování soustav vrstev na vzorcích....

Budasz, Jiří
Ústav fyziky plazmatu, 2018

Stabilita optického monitoru při depozici 42-vrstvého interferenčního „bandpass“ filtru 520-590 nm
Žídek, Karel
2018 - Czech
V této zprávě popisujeme stabilitu depozice komplikovaných soustav tenkých vrstev, které byly navrženy jako interferenční filtr s pásmovou propustností. Jde o 42 vrstev TiO2 a SiO2, které jsou monitorovány jednak tzv. krystalovým a optickým monitorem tloušťky. Diskutujeme případ, kdy je návrh IF průběžně upravován podle reálné tloušťky deponovaných vrstev. We report on stability of a deposition process of a complex system of thin layers. The layers were designed as a 42-layer bandpass interference filter. The layers of TiO2 and SiO2 were monitored both by the means of a crystal and an optical thickness monitor. We discuss the case when the design of the interference filter is continuously adapted according to the real thickness of the already deposited layers. Keywords: thin layer deposition; thickness monitor; interference filter; deposition stability Available at various institutes of the ASCR
Stabilita optického monitoru při depozici 42-vrstvého interferenčního „bandpass“ filtru 520-590 nm

V této zprávě popisujeme stabilitu depozice komplikovaných soustav tenkých vrstev, které byly navrženy jako interferenční filtr s pásmovou propustností. Jde o 42 vrstev TiO2 a SiO2, které jsou ...

Žídek, Karel
Ústav fyziky plazmatu, 2018

Electric probe measurements in the anode area of a DC arc plasma torch at low pressure
Ondáč, Peter; Mašláni, Alan; Hrabovský, Milan
2018 - English
We measured radial profiles of the electric field, plasma electrical potential and electron temperature in the hot anode area of a hybrid water-argon DC arc plasma torch with an external anode. The measurements were made under different values of the ambient pressure, during the restrike mode with a constricted anode arc attachment or during a supersonic mode with a diffuse anode arc attachment. The results provide first experimental data on plasma electrical potential in that anode area. Keywords: plasma; arc; anode; low pressure; electric probes Available at various institutes of the ASCR
Electric probe measurements in the anode area of a DC arc plasma torch at low pressure

We measured radial profiles of the electric field, plasma electrical potential and electron temperature in the hot anode area of a hybrid water-argon DC arc plasma torch with an external anode. The ...

Ondáč, Peter; Mašláni, Alan; Hrabovský, Milan
Ústav fyziky plazmatu, 2018

The effect of spark plasma sintering on the porosity and mechanical properties of Ti-15Mo alloy
Terynková, A.; Kozlík, J.; Bartha, K.; Chráska, Tomáš; Dlabáček, Zdeněk; Stráský, J.
2018 - English
Metastable β-titanium alloys are receiving much interest for various applications such as aircraft industry and medicine thanks to their excellent mechanical properties and biocompatibility. The common way of preparing the titanium alloys is hindered by its production costs. Powder metallurgy (PM) approach is a promising route for cost-effective fabrication of titanium alloys due to possibility of near net shaping. In this study, binary biomedical Ti-15Mo alloy was prepared by PM. Gas atomized powder was sintered by spark plasma sintering (SPS) above the β-transus temperature of the studied alloy. The compaction of the powders was accomplished by short-time sintering. The effect of the time of sintering on the porosity and the microhardness in centre part as well as in periphery part of the sample was investigated. The samples revealed significant inhomogeneity the porosity increases with the distance from the centre of the specimen. With increasing sintering times the porosity decreases and simultaneously the microhardness increases. Keywords: Metastable β-titanium alloys; Porosity; Powder metallurgy; Spark plasma sintering Available at various institutes of the ASCR
The effect of spark plasma sintering on the porosity and mechanical properties of Ti-15Mo alloy

Metastable β-titanium alloys are receiving much interest for various applications such as aircraft industry and medicine thanks to their excellent mechanical properties and biocompatibility. The ...

Terynková, A.; Kozlík, J.; Bartha, K.; Chráska, Tomáš; Dlabáček, Zdeněk; Stráský, J.
Ústav fyziky plazmatu, 2018

OLGA – efficient full wave code for the coupling of LH grills
Preinhaelter, Josef; Hillairet, J.; Urban, Jakub
2018 - English
The full wave code OLGA, for determining the coupling of a single row lower hybrid launcher (waveguide grills) to the plasma, is extended to handle multirow multijunction active passive structures (like the C3 and C4 launchers on TORE SUPRA) by implementing the scattering matrix formalism. The extended code is still computationally fast because of the use of (i) 2D splines of the plasma surface admittance in the accessibility region of the k-space, (ii) high order Gaussian quadrature rules for the integration of the coupling elements and (iii) utilizing the symmetries of the coupling elements in the multiperiodic structures. The extended OLGA code is benchmarked against the ALOHA-1D, ALOHA-2D and TOPLHA codes for the coupling of the C3 and C4 TORE SUPRA launchers for several plasma configurations derived from reflectometry and interferometery. Unlike nearly all codes (except the ALOHA-1D code), OLGA does not require large computational resources and can be used for everyday usage in planning experimental runs. In particular, it is shown that the OLGA code correctly handles the coupling of the C3 and C4 launchers over a very wide range of plasma densities in front of the grill. Keywords: lower hybrid waves; coupling; large multirow multijunction grills; tokamak; full-wave Fulltext is available at external website.
OLGA – efficient full wave code for the coupling of LH grills

The full wave code OLGA, for determining the coupling of a single row lower hybrid launcher (waveguide grills) to the plasma, is extended to handle multirow multijunction active passive structures ...

Preinhaelter, Josef; Hillairet, J.; Urban, Jakub
Ústav fyziky plazmatu, 2018

Collimator - test readiness review
Budasz, Jiří; Kaván, František; Kredba, Jan; Lédl, Vít; Mach, Marek; Pleštil, Jan; Psota, Pavel; Steiger, Lukáš; Tomka, David; Václavík, Jan; Veselý, Martin
2018 - English
This document describes the test procedure applicable to the overall functional test of the NEOSTED collimator.\nThe test to be performed according to this procedure are to demonstrate the compliance of the above item to the requirements specified in the applicable document as part of the overall verification program. The test results shall be collected in a Test Report. Keywords: collimator; PLC system; telescope; interferometry Available at various institutes of the ASCR
Collimator - test readiness review

This document describes the test procedure applicable to the overall functional test of the NEOSTED collimator.\nThe test to be performed according to this procedure are to demonstrate the compliance ...

Budasz, Jiří; Kaván, František; Kredba, Jan; Lédl, Vít; Mach, Marek; Pleštil, Jan; Psota, Pavel; Steiger, Lukáš; Tomka, David; Václavík, Jan; Veselý, Martin
Ústav fyziky plazmatu, 2018

Technical manual - neosted SOT test bench
Steiger, Lukáš
2018 - English
The purpose of this document is to provide basic set of rules and instructions that allows using and maintaining of the NEOSTED SOT test bench (BB).\nFurther detailed informations and proper references about individual parts of the BB system can be found in [AD-2, AD-3]. Keywords: test bench; optical testing; collimator; neosted Available at various institutes of the ASCR
Technical manual - neosted SOT test bench

The purpose of this document is to provide basic set of rules and instructions that allows using and maintaining of the NEOSTED SOT test bench (BB).\nFurther detailed informations and proper ...

Steiger, Lukáš
Ústav fyziky plazmatu, 2018

Vývoj procesu mytí a příprava povrchu před depozicí
Budasz, Jiří
2018 - Czech
Zpráva popisuje vývoj mycího postupu substrátů pro výrobu superodrazných zrcadel. Zahrnuje také vývoj procesu ošetření povrchu ve vakuu. The report deals with a development of cleaning precedure of substrates used for producing high reflective mirrors. It involves pre-deposition treatment of the surface in vacuum chamber. Keywords: High reflective coatings; cleaning; pre-deposition treatment Available at various institutes of the ASCR
Vývoj procesu mytí a příprava povrchu před depozicí

Zpráva popisuje vývoj mycího postupu substrátů pro výrobu superodrazných zrcadel. Zahrnuje také vývoj procesu ošetření povrchu ve vakuu....

Budasz, Jiří
Ústav fyziky plazmatu, 2018

Dalekohledy typu Dall-Kirkham
Rail, Zdeněk; Ulrichová, Iva; Kuryshev, V.; Vápenka, David
2018 - Czech
Referát se zabývá optickými vadami dvojzrcadlových dalekohledů s elipsoidálními primárními a sférickými sekundárními zrcadly. Systém byl objeven na konci dvacátých let minulého století Horacem Dallem a Alanem Kirkhamem. Jeho optické prvky jsou snadno vyrobitelné a měřitelné. Tyto dalekohledy lze vybavit korektory a vytvořit z nich víceúčelové přístroje jak pro planetární pozorování, tak pro fotografování širokých zorných polí. Několik takových přístrojů bylo vyrobeno i v dílně Centra Toptec v Turnově. The paper deals with the optical aberrations of the two-mirror telescopes composed of the ellipsoidal primary and the spherical secondary mirrors. The system was discovered by Horace Dall and Alan Kirkham at the end of the Twenties of the 20th Century. Its optical elements are easy to manufacture and measure. These telescopes can be equipped by lens correctors and turned into multipurpose devices both for planetary observation and wide field photography. Several telescopes were manufactured in workshop of the Toptec Center in Turnov. Keywords: Two-mirror telescope; field corrector; optical aberrations; spherochromatic aberration; koma; astigmatism Available at various institutes of the ASCR
Dalekohledy typu Dall-Kirkham

Referát se zabývá optickými vadami dvojzrcadlových dalekohledů s elipsoidálními primárními a sférickými sekundárními zrcadly. Systém byl objeven na konci dvacátých let minulého století Horacem Dallem ...

Rail, Zdeněk; Ulrichová, Iva; Kuryshev, V.; Vápenka, David
Ústav fyziky plazmatu, 2018

Optický prvek 2G20 6x8x mm
Pintr, Pavel
2018 - Czech
Optický prvek 2G20 6x8 mm je určen pro proměnné dopravní značení (PDZ) v dopravě . Zajišťuje promíchání RGB diod na bílé světlo a jeho usměrnění do směru dle normy ČSN EN 12966 třídy B6. \n Optical element 2G20 6x8 mm is designed for a variable traffic marking. It assures the mixing of RGB diodes in white light and its direction in accordance with the specification ČSN EN 12966 class B6. Keywords: optical element; 2G20 6x8 mm; PDZ Available at various institutes of the ASCR
Optický prvek 2G20 6x8x mm

Optický prvek 2G20 6x8 mm je určen pro proměnné dopravní značení (PDZ) v dopravě . Zajišťuje promíchání RGB diod na bílé světlo a jeho usměrnění do směru dle normy ČSN EN 12966 třídy B6. ...

Pintr, Pavel
Ústav fyziky plazmatu, 2018

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