Searched for: subject%3A%22Cryogenics%22
(1 - 20 of 27)

Pages

List view
Grid view
document
Schnetler, H. (author), van de Vorst, L.T.G. (author), Snell, R. (author), Atkins, C. (author), Miller, C. (author), Morris, K. (author), Farkas, S. (author), MezA, G. (author), Roulet, M. (author), Hugot, E. (author), Vega-Moreno, A. (author), Tenegi Sanginés, F. (author), Dufils, J. (author)
Additive manufacturing (AM) methods and post processing techniques are promising methodologies considering that it is now possible to print in a wide variety of materials using processes much refined from those originally available twenty years ago. To date the uptake of AM in Astronomy is relatively low compared to other application areas,...
conference paper 2020
document
Bahceli, G. (author), Atli-Veltin, B. (author), Wilbers, D. (author), Cebeci, H. (author)
Energy transition towards cleaner fuels and renewable energy brings the attention to liquefied natural gas (LNG) and liquid hydrogen (LH2) applications. Cryogenic storage temperatures make the suitable material selection for the construction of such applications difficult. Ultra-high molecular weight polyethylene (UHMWPE) thermoplastics are...
conference paper 2019
document
Atli-Veltin, B. (author)
conference paper 2018
document
Atli-Veltin, B. (author)
The main objective of the experimental study detailed in this paper is to investigate the performance of fully recyclable, lightweight, low-cost, thermoplastic Polypropylene (PP) composite tapes at low temperatures. Coupons made of [±45] and [0/90] laminates are subjected to tensile and 3-point bending tests at room temperature as well as at ...
article 2018
document
Atli-Veltin, B. (author)
In the small scale LNG infrastructure, composite materials are scarcely employed. Potentially, cost effective solutions for LNG applications could be developed thanks to the advantages of composite materials over metals such as weight savings, design flexibility and recyclability. The research presented in this paper focuses on the mechanical...
conference paper 2017
document
van den Dool, T.C. (author), Gielesen, W. (author), Kamphues, F. (author), Loix, N. (author), Kooijman, P.P. (author), de Vries, C. (author), van Weers, H. (author), Fleury, K. (author), Stockman, Y. (author), Velsink, G. (author), Benoit, J. (author), Poupinet, A. (author), Sève, F. (author), TNO Industrie en Techniek (author)
TNO, in cooperation with Micromega-Dynamics, SRON, Dutch Space and CSL, has designed a compact breadboard cryogenic delay line (figure 1) for use in future space interferometry missions. The work is performed under ESA contract 17.747/03 in preparation for the DARWIN mission. The breadboard (BB) delay line is representative of a flight mechanism...
conference paper 2017
document
Camp, W.V.D. (author), Dhallé, M.M.J. (author), Wessel, W.A.J. (author), Warnet, L. (author), Atli-Veltin, B. (author), Putten, S.V.D. (author), Dam, J.A.M. (author), Ter Brake, H.J.M. (author)
This paper reports on the cryogenic fatigue life of Al 2024 / Stycast 2850 FT composite sandwiches loaded under cyclic strain, as well as on the strength of their constituent materials at 77 K. These Fibre Metal Laminate (FML) specimen serve as a model for an alternative class of cryogenic structural materials that might be used e.g. in...
conference paper 2015
document
Voormeeren, L.O. (author), Atli-Veltin, B. (author), Vredeveldt, A.W. (author)
The increasing use of liquefied natural gas (LNG) as bunker fuel in ships, calls for an elaborate study regarding the risks involved. One particular issue is the vulnerability of cryogenic LNG storage tanks with respect to impact loadings, such as ship collisions and dropped objects. This requires an understanding of the impact resistance of the...
conference paper 2014
document
Navarro, R. (author), Elswijk, E. (author), te Voert, M.J.A. (author), Venema, L. (author)
NOVA-ASTRON has delivered a suite of cryogenic astronomical instruments for large ground based telescopes as well as space missions. The instruments include polarimeters, spectrometers, cameras and interferometers, mostly operating at infrared. Several methods have been developed to verify or measure, under cryogenic conditions, the performance...
conference paper 2014
document
Atli-Veltin, B. (author), Vredeveldt, A.W. (author)
Shipping is gradually embracing natural gas as bunker fuel. The most viable way to store natural gas on board is in its liquid form. Gas needs to be cooled to cryogenic temperatures and in practice moderately pressurized. On board ships, solely double walled pressure tanks are used for this purpose. Loss of containment due to a collision, is one...
conference paper 2014
document
Gielesen, W.L.M. (author), de Bruijn, D. (author), van den Dool, T.C. (author), Kamphues, F.G. (author), Mekking, J. (author), Calvel, B. (author), Laborie, A. (author), Coatantiec, C. (author), Touzeau, S. (author), Erdmann, M. (author), Gare, P. (author), Monteiro, D. (author)
The Gaia mission will create an extraordinarily precise three-dimensional map of more than one billion stars in our Galaxy. The Gaia spacecraft2, built by EADS Astrium, is part of ESA's Cosmic Vision programme and scheduled for launch in 2013. Gaia measures the position, distance and motion of stars with an accuracy of 24 micro-arcsec using two...
conference paper 2013
document
van den Dool, T.C. (author), Kruizinga, B. (author), Braam, B.C. (author), Hamelinck, R.F.M.M. (author), Loix, N. (author), van Loon, D. (author), Dams, J. (author)
TNO, together with its partners, have designed a cryogenic scanning mechanism for use in the SAFARI Fourier Transform Spectrometer (FTS) on board of the SPICA mission. SPICA is one of the M-class missions competing to be launched in ESA's Cosmic Vision Programme in 2022. JAXA leads the development of the SPICA satellite and SRON is the prime...
conference paper 2012
document
Gielesen, W.L.M. (author), de Bruijn, D. (author), van den Dool, T.C. (author), Kamphues, F.G. (author), Meijer, E.A. (author), Calvel, B. (author), Laborie, A. (author), Monteiro, D. (author), Coatantiec, C. (author), Touzeau, S. (author), Erdmann, M. (author), Gare, P. (author)
The Gaia mission1 will create an extraordinarily precise three-dimensional map of more than one billion stars in our Galaxy. The Gaia spacecraft2, built by EADS Astrium, is part of ESA's Cosmic Vision programme and scheduled for launch in 2013. Gaia measures the position, distance and motion of stars with an accuracy of 24 micro-arcsec using two...
conference paper 2012
document
Pijnenburg, J.A.C.M. (author), te Voert, M.J.A. (author), de Vreugd, J. (author), Vosteen, L.L.A. (author), van Werkhoven, W.P. (author), Mekking, J. (author), Nijland, B.A.H. (author)
Through the years many stable optical mounts have been designed, analyzed and tested at TNO. This paper gives an overview of the design principles used. Various examples are presented together with verification test results. The use of adhesives in combination with an iso-static mount design allows mounting of optical components in a limited...
conference paper 2012
document
Pijnenburg, J.A.C.M. (author), te Voert, M.J.A. (author), de Vreugd, J. (author), Vosteen, L.L.A. (author), van Werkhoven, W.P. (author), Mekking, J. (author), Nijland, B.A.H. (author)
Through the years many stable optical mounts have been designed, analyzed and tested at TNO. This paper gives an overview of the design principles used. Various examples are presented together with verification test results. The use of adhesives in combination with an iso-static mount design allows mounting of optical components in a limited...
public lecture 2012
document
Weltevreden, E.R. (author), van der Heide, E. (author)
When dealing with high-tech equipment, accurate positioning is of the utmost importance to ensure durability and a productive lifetime. Unexpected high friction or wear of positioning mechanisms can lead to unnecessary down-time or products that are not up to specification. To ensure a sufficient lifetime, it is necessary to know beforehand how...
conference paper 2011
document
TNO Industrie en Techniek (author), van den Dool, T.C. (author), Hamelinck, R.F.M.M. (author), Kruizinga, B. (author), Gielesen, W.L.M. (author), Braam, B.C. (author), Nijenhuis, J.R. (author), Loix, N. (author), Luyckx, S. (author), van Loon, D. (author), Kooijman, P.P. (author), Swinyard, B.M. (author)
TNO, together with its partners Micromega and SRON, have designed a cryogenic scanning mechanism for use in the SAFARI Fourier Transform Spectrometer (FTS) on board of the SPICA mission. The optics of the FTS scanning mechanism (FTSM) consists of two back-to-back cat's-eyes. The optics are mounted on a central "back-bone" tube which houses all...
conference paper 2010
document
TNO Industrie en Techniek (author), Vosteen, L.L.A. (author), Draaisma, F. (author), Werkhoven, W.P. (author), Riel, L.J.M. (author), Mol, M.H. (author), Den, O.G. (author)
TNO developed a Wave Front Sensor (WFS) instrument for the GAIA mission. This Wave Front Sensor will be used to monitor the wave front errors of the two main telescopes mounted on the GAIA satellite, which may be corrected by a 5- degree of freedom (DOF) mechanism during operation. The GAIA-WFS will operate over a broad wavelength (450 to 900 nm...
conference paper 2009
document
TNO Industrie en Techniek (author), van den Dool, T.C. (author), Kamphues, F.G. (author), Gielesen, W.L.M. (author), Braam, B.C. (author), Loix, N. (author), Kooijman, P.P. (author), Velsink, G. (author), Stockman, Y. (author), Benoit, J. (author), Sève, F. (author)
TNO has developed a compact BreadBoard (BB) cryogenic Optical Delay Line (ODL) for use in future space interferometry missions such as ESA's Darwin and NASA's TPF-I. The breadboard delay line is representative of a flight mechanism. The optical design is a two-mirror cat's-eye. A linear guiding system based on magnetic bearings provides...
conference paper 2007
document
Atad-Ettedgui, E. (author), Peacocke, T. (author), Montgomery, D. (author), Gostick, D. (author), McGregor, H. (author), Cliff, M. (author), Saunders, I. (author), Ploeg, L. (author), Dorrepaal, M. (author), van Venrooij, B. (author), TNO Industrie en Techniek (author)
This paper describes the opto-mechanical design of a large instrument for sub-nun, SCUBA-2, to be commissioned at JCMT. The scientific requirements, specially the large fov and the constraints of the telescope mechanical structure, lead to a complex optical design using freeform aluminium minors. The mechanical design is also challenging with...
conference paper 2006
Searched for: subject%3A%22Cryogenics%22
(1 - 20 of 27)

Pages

List view
Grid view