Zobrazeno 1 - 10
of 12
pro vyhledávání: '"N. C. J. van der Valk"'
Autor:
Gert Witvoet, R. den Breeje, Rudolf Saathof, C.W. Korevaar, W.E. Crowcombe, N. van der Heiden, M. Dresscher, Erik Fritz, H. de Man, Stefan Kuiper, N. C. J. van der Valk, Niek Doelman, Jet Human, C. M. Duque, T.J. de Lange
Publikováno v:
IEEE International Conference on Space Optical Systems and Applications, ICSOS 2019, 14-16 October 2019, Portland, OR, USA
The anticipated capacity benefit of optical satellite communications has triggered a cascade of technology developments. In this paper, we present three such technologies, namely; i). A cube satellite laser terminal (CubeCAT), ii). A lower Earth orbi
Autor:
G. Siegl, T. Huijser, S. Huygen, Helmut Faugel, R. D'Inca, M. Vervier, A. Onyshchenko, D. Hangan, Pierre Dumortier, A. Messiaen, N. C. J. van der Valk
Publikováno v:
Fusion Engineering and Design, 6-8, 86, 831-834
RF arc detection is a key operational and safety issue for ICRF systems. Dedicated measurements on a RF test-stand were made in order to characterize the optical signature of RF arcs (time and spectrum) to assess the potential of optical arc detectio
Publikováno v:
Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences. 362:315-321
We have detected sub-wavelength spot sizes in the near-field of a metal tip, which is illuminated with terahertz (THz) pulses. The THz near-field is detected by using electro-optic detection in a (100) oriented GaP crystal. Contrary to conventional e
Publikováno v:
Physics in Medicine and Biology. 47:3699-3704
We have built a relatively simple, highly efficient, terahertz (THz) emission and detection system centred around a 15 fs Ti:sapphire laser. In the system, 200 mW of laser power is focused on a 120 microm diameter spot between two silverpaint electro
Design and performance of a THz emission and detection setup based on a semi-insulating GaAs emitter
Publikováno v:
Review of Scientific Instruments, 73(4), 1715-1719. American Institute of Physics
We have built a relatively simple, highly efficient, THz emission and detection system centered around a 15 fs Ti:sapphire laser. In the system, 200 mW of laser power is focused to a 120 µm diam spot between two silverpaint electrodes on the surface
Autor:
N C J, van der Valk, P C M, Planken
Publikováno v:
Journal of biological physics. 29(2-3)
We report on a method to obtain asub-wavelength resolution in terahertz time-domain imaging. In our method,a sharp copper tip is used to locallydistort and concentrate the THz electricfield. The distorted electric field, presentmainly in the near fie
Publikováno v:
Applied Physics Letters, 81 (9), 2002
We report on a method to obtain a subwavelength resolution in terahertz time-domain imaging. In our method, a sharp copper tip is used to locally distort and concentrate the THz electric field. The distorted electric field, present mainly in the near
Publikováno v:
Ultrafast Phenomena XIII ISBN: 9783642639333
There is currently a strong interest to improve the spatial resolution in THz time-domain imaging for THz microscopy of single cells. To date, work on improving the resolution was based on the use of an aperture[1] or a dynamic aperture[2], to limit
Autor:
Rje Roger Jaspers, Andrey Litnovsky, P. Bourauel, A. Hogenbirk, G. Kiss, N. C. Hawkes, D. Dunai, J.F. Koning, Vladislav Kotov, K. Patel, Wolfgang Biel, Gergö Pokol, Yury Krasikov, V. Szabó, N. C. J. van der Valk, Anatoly Panin, M. Durkut, Olaf Neubauer, F. Klinkhamer, Gábor Erdei, R. Voinchet, G. Offermanns, T. Baross, Michael Schrader, O. Lischtschenko, S. Zoletnik, B. Snijders, O. Marchuk, J. Wolters, A. Krimmer, M. v.Hellermann
Publikováno v:
Fusion Engineering and Design, 6-8, 86, 548-551
Fusion Engineering and Design, 86(6-8), 548-1/4. Elsevier
Fusion Engineering and Design, 86, 548-551
Fusion Engineering and Design, 86(6-8), 548-1/4. Elsevier
Fusion Engineering and Design, 86, 548-551
The ITER core charge exchange recombination spectroscopy (core CXRS) diagnostic system is designed to provide experimental access to various measurement quantities in the ITER core plasma such as ion densities, temperatures and velocities. The implem
Publikováno v:
Review of Scientific Instruments. 76:073104
In electro-optic detection of terahertz transients, the photodiodes of a differential detector are often illuminated with optical powers on the order of several milliwatts. We present measurements that show that the response of the photodiodes at the