Number of found documents: 516
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METIS mirror M2 FS
Lédl, Vít; Melich, Radek; Vít, Tomáš
2016 - English
Scope of the document is to provide required test results with respect to the structure and optical performance of individual optical surfaces of M2 mirror FS version. The mirror has a unique numbering M2-C21-24. Keywords: METIS mirror M2 FS Available at various institutes of the ASCR
METIS mirror M2 FS

Scope of the document is to provide required test results with respect to the structure and optical performance of individual optical surfaces of M2 mirror FS version. The mirror has a unique ...

Lédl, Vít; Melich, Radek; Vít, Tomáš
Ústav fyziky plazmatu, 2016

Deposition of Titania from Solution by Hybrid Water-Stabilized Plasma Torch
Mušálek, Radek; Medřický, Jan; Tesař, Tomáš; Kotlan, Jiří; Lukáč, František
2016 - English
Thermal spraying with liquid feedstock presents a novel route for deposition of functional coatings. In this study, possibility of preparation of titania coatings from solution by hybrid water stabilized plasma torch is presented. Coatings were prepared from solution of titanium isopropoxide Ti[OCH(CH3)2]4 in anhydrous ethanol. Fragmentation of feedstock stream in the plasma jet was monitored by shadowgraphy. Deposition was carried out on steel samples mounted to the cooled rotating carousel. Cross-sectional images from SEM microscope showed successful formation of the deposit with dual morphology consisting of fine feather-like features combined with bigger droplets. X-ray diffraction revealed formation of nanometric rutile crystallites. Keywords: Thermal spraying; plasma spraying; titania; solution; liquid feedstock Available at various institutes of the ASCR
Deposition of Titania from Solution by Hybrid Water-Stabilized Plasma Torch

Thermal spraying with liquid feedstock presents a novel route for deposition of functional coatings. In this study, possibility of preparation of titania coatings from solution by hybrid water ...

Mušálek, Radek; Medřický, Jan; Tesař, Tomáš; Kotlan, Jiří; Lukáč, František
Ústav fyziky plazmatu, 2016

Optimalizace a testování ITO vrstev
Hlubuček, Jiří
2016 - Czech
Všechny depozice ITO probíhaly za pokojové teploty na BK7 substrát tloušťky 80 mm. Během, někdy i po depozici, se teplota v komoře mírně zvyšovala především při použití asistenčního děla, nikdy však nepřesáhla 40 °C. Rychlost odprašování je relativně vysoká, proto byly použity relativně nízké výkony primárního iontového děla (KDC). Optimalizovala se příprava bez i s použitím asistenčního iontového děla (IBAD) s kyslíkovým nebo kyslíkovo-argonovým výbojem. Rychlost depozice určena podle krystalového monitoru (CRY), reálná se mírně liší podle typu depozice. Tloušťky vrstev určeny na základě měření elipsometru. Odpor měřen přiložením kontaktů na okraje vzorku v prostředku podél homogenní tloušťky vrstvy. This report deals with ITO (indium tin oxide) deposition by ion-beam sputtering, and was custom-made for Crytur. All the depositions were performed at room temperature (i.e. without heating). Optimalization of ITO thin films was made without as well as with the assistant ion beam using oxygen or argon-oxygen discharge. Deposition rate was tracked in-situ by quartz crystal monitor. More precise determination of the film thickness was made after deposition by spectroscopic ellipsometry. Electrical resistance was also evaluated.\n Keywords: ITO; IBS; IBAD; sputtering process development Available at various institutes of the ASCR
Optimalizace a testování ITO vrstev

Všechny depozice ITO probíhaly za pokojové teploty na BK7 substrát tloušťky 80 mm. Během, někdy i po depozici, se teplota v komoře mírně zvyšovala především při použití asistenčního děla, nikdy však ...

Hlubuček, Jiří
Ústav fyziky plazmatu, 2016

Arc–Anode Attachment Area in DC Arc Plasma Torch at Low Pressure
Ondáč, Peter; Mašláni, Alan; Hrabovský, Milan
2016 - English
Studying the processes in the anode attachment area of a DC arc plasma torch helps to extend the lifetime of the anode, stabilize the plasma flow for plasma spraying and better understand the movement of the anode attachment. In this work, such processes were studied at low pressure, by a non-disturbing method, using a high-speed camera and a high voltage probe. We also found pressure ranges, in which the following transitions were observed: the constricted/diffuse anode attachment, and subsonic/supersonic plasma jet\n Keywords: Arc Plasma Torch; Arc–Anode Attachment; Low Pressure Available at various institutes of the ASCR
Arc–Anode Attachment Area in DC Arc Plasma Torch at Low Pressure

Studying the processes in the anode attachment area of a DC arc plasma torch helps to extend the lifetime of the anode, stabilize the plasma flow for plasma spraying and better understand the movement ...

Ondáč, Peter; Mašláni, Alan; Hrabovský, Milan
Ústav fyziky plazmatu, 2016

Selection process of an observation objective with respect to minimal glare level
Melich, Radek; Václavík, Jan; Žídek, Karel
2016 - English
An observation objective (OO) that will image the projection screen on the camera detector is necessary to choose in a such a way that its glare performance is traced. This objective feature is not documented by an objective supplier, therefore we design a procedure that enable us to relatively compare the objective between each other. Keywords: objective glare Available at various institutes of the ASCR
Selection process of an observation objective with respect to minimal glare level

An observation objective (OO) that will image the projection screen on the camera detector is necessary to choose in a such a way that its glare performance is traced. This objective feature is not ...

Melich, Radek; Václavík, Jan; Žídek, Karel
Ústav fyziky plazmatu, 2016

Measurement attest of M0 - STM1
Lédl, Vít; Melich, Radek; Vít, Tomáš
2016 - English
Scope of the document is to provide required test results as demanded in order No 23/14 Attachment – paragraph 6 – bullet 7. Keywords: METIS mirror Mé - STM Available at various institutes of the ASCR
Measurement attest of M0 - STM1

Scope of the document is to provide required test results as demanded in order No 23/14 Attachment – paragraph 6 – bullet 7.

Lédl, Vít; Melich, Radek; Vít, Tomáš
Ústav fyziky plazmatu, 2016

Sférochromatické vada Clarkova objektivu z observatoře v Ondřejově
Rail, Zdeněk; Šrajer, Bohdan; Jareš, Daniel; Vápenka, David; Pintr, Pavel
2016 - Czech
V naší práci jsou předloženy výsledky matematické simulace zbytkových vad Clarkova objektivu o průměru 8 palců (203.2 mm). Tento achromatický dublet je používán na observatoři v Ondřejově více než 100 let k pozorování Slunce. In our paper the results of mathematical simulations of the residual aberrations of Clark‘s 8 inch (diameter 203.2 mm) objective lens are presented. This achromatic dublet has been used at the Ondřejov Observatory for more than 100 years mostly for solar observation. Keywords: Alvan Clark doublet; Achromatic objective; Spherochromatic aberration; Longitudal chromatic aberration; Dispersion curve; Non aplanatic dublet; Spotdiagrams; Solar photosphere photography; Ondrejov observatory Available at various institutes of the ASCR
Sférochromatické vada Clarkova objektivu z observatoře v Ondřejově

V naší práci jsou předloženy výsledky matematické simulace zbytkových vad Clarkova objektivu o průměru 8 palců (203.2 mm). Tento achromatický dublet je používán na observatoři v Ondřejově více než 100 ...

Rail, Zdeněk; Šrajer, Bohdan; Jareš, Daniel; Vápenka, David; Pintr, Pavel
Ústav fyziky plazmatu, 2016

NEOSTEL Collimator Realization Detailed Optical Design.
Melich, Radek; Steiger, Lukáš; Václavík, Jan; Vít, T.
2016 - English
The aim of this document is to describe the optical design of the Alignment Collimator for the NEOSTEL telescope. The document describes proposed optical and mechanical design. It consists of several parts:\n• Optical design and its tolerance analysis\n• Ghost image analysis\n• Stray light analysis\n• Mechanical design and FEM analysis Keywords: Alignment Collimator; NEOSTEL; Optical design Available at various institutes of the ASCR
NEOSTEL Collimator Realization Detailed Optical Design.

The aim of this document is to describe the optical design of the Alignment Collimator for the NEOSTEL telescope. The document describes proposed optical and mechanical design. It consists of several ...

Melich, Radek; Steiger, Lukáš; Václavík, Jan; Vít, T.
Ústav fyziky plazmatu, 2016

METIS mirror M0 FM
Lédl, Vít; Melich, Radek; Vít, Tomáš
2016 - English
Scope of the document is to provide required test results with respect to the structure of M0 mirror, FM version. The mirror has a unique numbering M0-C19-22. Keywords: METSI M0 FM mirror Available at various institutes of the ASCR
METIS mirror M0 FM

Scope of the document is to provide required test results with respect to the structure of M0 mirror, FM version. The mirror has a unique numbering M0-C19-22.

Lédl, Vít; Melich, Radek; Vít, Tomáš
Ústav fyziky plazmatu, 2016

Infrared measurements in medium and long wavelength on COMPASS
Vondráček, Petr; Horáček, Jan; Pánek, Radomír; Gauthier, E.
2016 - English
The experimental study of radial profiles of parallel heat flux in the scrape-off layer (SOL) of the COMPASS tokamak shows a systematic discrepancy between medium (MWIR) and long (LWIR) wavelength infrared (IR) thermographic measurements. Significant temperature and heat flux overestimation is observed in the MWIR range, whilst the LWIR range is almost not affected. It is assumed to be caused by a presence of dust particles creating sub-pixel sized micro hot-spots. Significant inhomogeneity of the surface conditions across the limiter is observed, resulting in local disturbance of the derived heat flux profiles (decay length variation up to ~ few tens of percent). Influence of the inhomogeneously distributed micro hot-spots is suppressed using correction factors (the heat transmission coefficient α) for each pixel separately in the heat flux calculation. Procedure of the α coefficient estimation is described. Keywords: IR; MWIR; LWIR; Dust; COMPASS; SOL Available at various institutes of the ASCR
Infrared measurements in medium and long wavelength on COMPASS

The experimental study of radial profiles of parallel heat flux in the scrape-off layer (SOL) of the COMPASS tokamak shows a systematic discrepancy between medium (MWIR) and long (LWIR) wavelength ...

Vondráček, Petr; Horáček, Jan; Pánek, Radomír; Gauthier, E.
Ústav fyziky plazmatu, 2016

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