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Verlaan, A.L. (author), Giesen, P.T.M. (author), van Grol, P. (author), Limpens, M. (author), Heijmans, J.A.C. (author), Visser, H. (author), Vink, H.J.P. (author), Maniscalco, M.P. (author), Verhoeff, P. (author), O'Neill, R. (author), Smith, M. (author), Stratton, B. (author), Gattuso, A. (author), Smiley, M. (author), Lasnier, C.J. (author), Feder, R. (author), Vasquez, J. (author), LeSher, M. (author)The Upper port Wide Angle Viewing System (UWAVS) is diagnostic system that provides visible light and InfraRed images of the divertor area in the ITER tokamak. The main functions of the UWAVS are to provide divertor wall and plasma luminance and temperature distributions at high spatial resolution (3–5 mm) and frame rates (500–1000 Hz) for...article 2018
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Heijmans, J.A.C. (author)On 15 September 2016, ESA released the data of the first 1,000 days of measurements from the Gaia mission. The large data package included 1.1 billion star positions, motions, brightness values and more, as well as surprises such as supernova detections. Thanks in part to the accurate space interferometer BAM developed by TNO.article 2016
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Heijmans, J.A.C. (author), Nijenhuis, J.R. (author), Bos, A. (author)The E-ELT is the European Extremely Large Telescope with a primary mirror of 39 meters that is being developed by ESO for the European astronomical community and ESO members. For the realisation of the E-ELT, TNO Space and Scientific Instrumentation proposes several technical contributions. These are, among others, the mirror support structure,...article 2016
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Lasnier, C.J. (author), McLean, A.G. (author), Gattuso, A. (author), O'Neill, R. (author), Smiley, M. (author), Vasquez, J. (author), Feder, R. (author), Smith, M. (author), Stratton, B. (author), Johnson, D. (author), Verlaan, A.L. (author), Heijmans, J.A.C. (author)The Upper Wide Angle Viewing System (UWAVS) will be installed on five upper ports of ITER. This paper shows major requirements, gives an overview of the preliminary design with reasons for some design choices, examines self-emitted IR light from UWAVS optics and its effect on accuracy, and shows calculations of signal-to-noise ratios for the two...conference paper 2016
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Nijenhuis, J.R. (author), Heijmans, J.A.C. (author), de Breeje, R. (author), Hazelebach, R.L.M. (author), de Vreugd, J. (author), Crowcombe, W.E. (author), Naron, D.J. (author), Fritz, E.C. (author), Borghi, G. (author), Navarro, R. (author), Sillari, L. (author), Sambenedetto, E. (author), Eder, J. (author), Kamphues, F.G. (author)Described is the M1 segment support, as designed by TNO in the period 2015- 2016. The design has significantly changed and improved compared to the earlier designs. During the period 2009-2010 prototypes for the primary mirror support of the E-ELT have been developed. These have been extensively tested by ESO. Design improvement were found to be...conference paper 2016
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Sheinis, A. (author), Barden, S. (author), Birchall, M. (author), Carollo, D. (author), Bland-Hawthorn, J. (author), Brzeski, J. (author), Case, S. (author), Cannon, R. (author), Churilov, V. (author), Couch, W. (author), Dean, R. (author), De Silva, G. (author), D'Orazi, V. (author), Farrell, T. (author), Fiegert, K. (author), Freeman, K. (author), Frost, G. (author), Gers, L. (author), Goodwin, M. (author), Gray, D. (author), Heald, R. (author), Heijmans, J.A.C. (author), Jones, D. (author), Keller, S. (author), Klauser, U. (author), Kondrat, Y. (author), Lawrence, J. (author), Lee, S. (author), Mali, S. (author), Martell, S. (author), Mathews, D. (author), Mayfield, D. (author), Miziarski, S. (author), Muller, R. (author), Pai, N. (author), Patterson, R. (author), Penny, E. (author), Orr, D. (author), Shortridge, K. (author), Simpson, J. (author), Smedley, S. (author), Smith, G. (author), Stafford, D. (author), Staszak, N. (author), Vuong, M. (author), Waller, L. (author), Wylie de Boer, E. (author), Xavier, P. (author), Zheng, J. (author), Zhelem, R. (author), Zucker, D. (author)The High Efficiency and Resolution Multi Element Spectrograph, HERMES is an facility-class optical spectrograph for the AAT. It is designed primarily for Galactic Archeology [21], the first major attempt to create a detailed understanding of galaxy formation and evolution by studying the history of our own galaxy, the Milky Way. The goal of the...conference paper 2014
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Heijmans, J.A.C. (author), Cheng, L.K. (author), Wieringa, F.P. (author)The advantages of optical fibers as medical sensors are recognized world wide nowadays. Insensitivity to electromagnetic disturbances and relative small dimensions are the most well known properties. The advantages of fiber optic sensors are especially valuable within environments with high temperatures, aggressive or explosive chemicals, strong...conference paper 2008
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Heijmans, J.A.C. (author), Vleugels, M.P.H. (author), Tabak, E. (author), van den Dool, T.C. (author), Oderwald, M.P. (author), TNO Industrie en Techniek (author)Electrosurgery enables cutting and coagulation (desiccation) of tissue for Minimally Invasive Surgery. Measurements performed by TNO with an infrared camera showed that the forceps of an endoscopic instrument can be over 300°C in temperature. During electro-surgery the surgeon relies on the power control and endoscopic images to perform the...conference paper 2008