document

PMT gain calibration and monitoring based on highly compressed hit information in KM3NeT

Jung, B. (author), de Jong, M. (author), Fermani, P. (author), on behalf of the KM3NeT Collaboration, (author)

The cubic-kilometre neutrino telescope, consisting of large-scale 3D-arrays of photomultiplier tubes (PMTs) currently under construction on the Mediterranean seabed, relies on accurate calibration procedures in order to answer its science goals. These proceedings present an overview of a novel gain calibration method based on highly compressed...

conference paper 2021

document

Characterisation of the Hamamatsu photomultipliers for the KM3NeT Neutrino Telescope

Aiello, S. (author), van der Knaap, F.G.P. (author)

The Hamamatsu R12199-02 3-inch photomultiplier tube is the photodetector chosen for the first phase of the KM3NeT neutrino telescope. About 7000 photomultipliers have been characterised for dark count rate, timing spread and spurious pulses. The quantum efficiency, the gain and the peak-to-valley ratio have also been measured for a sub-sample in...

article 2018

document

Radiometric calibration of the gome-2 instrument

Otter, G.C.J. (author), Dijkhuizen, N. (author), Vosteen, L.L.A. (author), Brinkers, S. (author), Gür, B. (author), Kenter, P. (author)

The Global Ozone Monitoring Experiment-2(GOME-2) represents one of the European instruments carried on board the MetOp satellite within the ESA’s “Living Planet Program”. Consisting of three flight models (FM’s) it is intended to provide long-term monitoring of atmospheric ozone and other trace gases over a time frame of 15–20 years, thus...

conference paper 2017

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A method to stabilise the performance of negatively fed KM3NeT photomultipliers

Adrián-Martínez, S. (author), Ageron, M. (author), Aiello, S. (author), Albert, A. (author), Ameli, F. (author), Anassontzis, E.G. (author), Andre, M. (author), Androulakis, G. (author), Anghinolfi, M. (author), Anton, G. (author), Ardid, M. (author), Avgitas, T. (author), Barbarino, G. (author), Barbarito, E. (author), Baret, B. (author), Barrios-Martí, J. (author), Belias, A. (author), Berbee, E. (author), van den Berg, A. (author), Bertin, V. (author), Beurthey, S. (author), van Beveren, V. (author), Beverini, N. (author), Biagi, S. (author), Biagioni, A. (author), Billault, M. (author), Bondì, M. (author), Bormuth, R. (author), Bouhadef, B. (author), Bourlis, G. (author), Bourret, S. (author), Boutonnet, C. (author), Bouwhuis, M. (author), Bozza, C. (author), Bruijn, R. (author), Brunner, J. (author), Buis, E.J. (author), Buompane, R. (author), Busto, J. (author), Cacopardo, G. (author), Caillat, L. (author), Calamai, M. (author), Calvo, D. (author), Capone, A. (author), Caramete, L. (author), Cecchini, S. (author), Celli, S. (author), Champion, C. (author), Cherubini, S. (author), Chiarella, V. (author), Chiarelli, L. (author), Chiarusi, T. (author), Circella, M. (author), Classen, L. (author), Cobas, D. (author), Cocimano, R. (author), Coelho, J.A.B. (author), Coleiro, A. (author), Colonges, S. (author), Coniglione, R. (author), Cordelli, M. (author), Cosquer, A. (author), Coyle, P. (author), Creusot, A. (author), Cuttone, G. (author), D'Amato, C. (author), D'Amico, A. (author), D'Onofrio, A. (author), De Bonis, G. (author), De Sio, C. (author), Di Capua, F. (author), Di Palma, I. (author), Distefano, C. (author), Donzaud, C. (author), Dornic, D. (author), Dorosti-Hasankiadeh, Q. (author), Drakopoulou, E. (author), Drouhin, D. (author), Durocher, M. (author), Eberl, T. (author), Eichie, S. (author), van Eijk, D. (author), El Bojaddaini, I. (author), Elsaesser, D. (author), Enzenhöfer, A. (author), Favaro, M. (author), Fermani, P. (author), Ferrara, G. (author), Frascadore, G. (author), Furini, M. (author), Fusco, L.A. (author), Gal, T. (author), Galatà, S. (author), Garufi, F. (author), Gay, P. (author), Gebyehu, M. (author), Giacomini, F. (author), Gialanella, L. (author), Giordano, V. (author), Gizani, N. (author), Gracia, R. (author), Graf, K. (author), Grégoire, T. (author), Grella, G. (author), Grmek, A. (author), Guerzoni, M. (author), Habel, R. (author), Hallmann, S. (author), van Haren, H. (author), Harissopulos, S. (author), Heid, T. (author), Heijboer, A. (author), Heine, E. (author), Henry, S. (author), Hernández-Rey, J.J. (author), Hevinga, M. (author), Hofestädt, J. (author), Hugon, C.M.F. (author), Illuminati, G. (author), James, C.W. (author), Jansweijer, P. (author), Jongen, M. (author), de Jong, M. (author), Kadler, M. (author), Kalekin, O. (author), Kappes, A. (author), Katz, U.F. (author), Keller, P. (author), Kieft, G. (author), Kießling, D. (author), Koffeman, E.N. (author), Kooijman, P. (author), Kouchner, A. (author), Kreter, M. (author), Kulikovskiy, V. (author), Lahmann, R. (author), Lamare, P. (author), Leisos, A. (author), Leonora, E. (author), Clark, M.L. (author), Liolios, A. (author), Alvarez, C.D.L. (author), Lo Presti, D. (author), Löhner, H. (author), Lonardo, A. (author), Lotze, M. (author), Loucatos, S. (author), Maccioni, E. (author), Mannheim, K. (author), Manzali, M. (author), Margiotta, A. (author), Margotti, A. (author), Marinelli, A. (author), Mariš, O. (author), Markou, C. (author), Martínez-Mora, J.A. (author), Martini, A. (author), Marzaioli, F. (author), Mele, R. (author), Melis, K.W. (author), Michael, T. (author), Migliozzi, P. (author), Migneco, E. (author), Mijakowski, P. (author), Miraglia, A. (author), Mollo, C.M. (author), Mongelli, M. (author), Morganti, M. (author), Moussa, A. (author), Musico, P. (author), Musumeci, M. (author), Nicolau, C.A. (author), Olcina, I. (author), Olivetto, C. (author), Orlando, A. (author), Orzelli, A. (author), Pancaldi, G. (author), Paolucci, A. (author), Papaikonomou, A. (author), Papaleo, R. (author), Pǎvǎlaš, G.E. (author), Peek, H. (author), Pellegrini, G. (author), Pellegrino, C. (author), Perrina, C. (author), Pfutzner, M. (author), Piattelli, P. (author), Pikounis, K. (author), Poma, G.E. (author), Popa, V. (author), Pradier, T. (author), Pratolongo, F. (author), Pühlhofer, G. (author), Pulvirenti, S. (author), Quinn, L. (author), Racca, C. (author), Raffaelli, F. (author), Randazzo, N. (author), Real, D. (author), Resvanis, L. (author), Reubelt, J. (author), Riccobene, G. (author), Rossi, C. (author), Rovelli, A. (author), Saldaña, M. (author), Salvadori, I. (author), Samtleben, D.F.E. (author), Sánchez García, A. (author), Sánchez Losa, A. (author), Sanguineti, M. (author), Santangelo, A. (author), Santonocito, D. (author), Sapienza, P. (author), Schimmel, F. (author), Schmelling, J. (author), Schnabel, J. (author), Sciacca, V. (author), Sedita, M. (author), Seitz, T. (author), Sgura, I. (author), Simeone, F. (author), Sipala, V. (author), Spisso, B. (author), Spurio, M. (author), Stavropoulos, G. (author), Steijger, J. (author), Stellacci, S.M. (author), Stransky, D. (author), Taiuti, M. (author), Tayalati, Y. (author), Terrasi, F. (author), Tézier, D. (author), Theraube, S. (author), Timmer, P. (author), Tönnis, C. (author), Trasatti, L. (author), Travaglini, R. (author), Trovato, A. (author), Tsirigotis, A. (author), Tzamarias, S. (author), Tzamariudaki, E. (author), Vallage, B. (author), van Elewyck, V. (author), Vermeulen, J. (author), Versari, F. (author), Vicini, P. (author), Viola, S. (author), Vivolo, D. (author), Volkert, M. (author), Wiggers, L. (author), Wilms, J. (author), de Wolf, E. (author), Zachariadou, K. (author), Zani, S. (author), Zornoza, J.D. (author), Zúñiga, J. (author)

The KM3NeT research infrastructure, currently under construction in the Mediterranean Sea, will host neutrino telescopes for the identification of neutrino sources in the Universe and for studies of the neutrino mass hierarchy. These telescopes will house hundreds of thousands of photomultiplier tubes that will have to be operated in a stable...

article 2016

document

Optical coupling structure made by imprinting between single-mode polymer waveguide and embedded VCSEL

Karppinen, M. (author), Salminen, N. (author), Korhonen, T. (author), Alajoki, T. (author), Petäjä, J. (author), Bosman, E. (author), van Steenberge, G. (author), Justice, J. (author), Khan, U. (author), Corbett, B. (author), Boersma, A. (author)

Polymer-based integrated optics is attractive for inter-chip optical interconnection applications, for instance, for coupling photonic devices to fibers in high density packaging. In such a hybrid integration scheme, a key challenge is to achieve efficient optical coupling between the photonic chips and waveguides. With the single-mode polymer...

conference paper 2015

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Eco-efficient hybrid coatings for durable textile applications by UV curing - hybritex

Goethals, F. (author), Eufinger, K. (author), de Vrieze, S. (author), Vanneste, M. (author), Schumann, A. (author), Wypkema, A. (author)

article 2014

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Toward large-area roll-to-roll printed nanophotonic sensors

Karioja, P. (author), Hiltunen, J. (author), Aikio, S.M. (author), Alajoki, T. (author), Tuominen, J. (author), Hiltunen, M. (author), Siitonen, S. (author), Kontturi, V. (author), Böhlen, K. (author), Hauser, R. (author), Charlton, M. (author), Boersma, A. (author), Lieberzeit, P. (author), Felder, T. (author), Eustace, D. (author), Haskal, E. (author)

Polymers have become an important material group in fabricating discrete photonic components and integrated optical devices. This is due to their good properties: high optical transmittance, versatile processability at relative low temperatures and potential for low-cost production. Recently, nanoimprinting or nanoimprint lithography (NIL) has...

conference paper 2014

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Characterization of Spirooxazine and Spiropyran Hosted in Poly(Methyl Methacrylate) for Germicidal UV Source Indicator Application

Bonefacino, J. (author), Tse, M.L.V. (author), Pun, C.F.J. (author), Cheng, X. (author), Chan, W.K.E. (author), Boersma, A. (author), Tam, H.Y. (author)

A characterization of photophysical properties of 1,3-dihydro-1,3,3-trimethylspiro[2H-indole-2,3’-[3H]naphtha[2,1-b] [1,4]oxazine] (spirooxazine) and 1’,3’-dihydro-1’,3’,3’-trimethyl-6-nitrospiro[2H-1-benzopyran-2,2’-(2H)-indole] (spi- ropyran) compounds hosted in poly(methyl methacrylate) (PMMA) was carried out. The parameters which influenced...

article 2013

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Degradation mechanism of silicone glues under UV irradiation and options for designing materials with increased stability

Fischer, H.R. (author), Semprimoschnig, C. (author), Mooney, C. (author), Rohr, T. (author), van Eck, E.R.H. (author), Verkuijlen, M.H.W. (author)

The degradation of silicone glues used, for example, in the assembly of solar modules for use in space, has been investigated and possible mechanisms which lead to colouration and possible embrittlement are analysed. Both effects are connected to the generation of radicals upon exposure to UV irradiation. As a follow up-reaction in vacuum, cross...

article 2013

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The TROPOMI instrument: first H/W results

Voors, R. (author), de Vries, J. (author), van der Valk, N.C.J. (author), Bhatti, I. (author), Woods, D.M. (author), Aben, I. (author), Hoogeveen, R. (author), Veefkind, J.P. (author), Kleipool, Q. (author)

The Tropospheric Monitoring Instrument, TROPOMI, is a passive UV-VIS-NIR-SWIR spectrograph, which uses sun backscattered radiation to study the Earth's atmosphere and to monitor air quality, on both global and local scale. It follows in the line of SCIAMACHY (2002) and OMI (2004), both of which have been very successful. OMI is still operational...

conference paper 2013

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Formation and removal of genotoxic activity during UV/H₂O₂-GAC treatment of drinking water

Heringa, M.B. (author), Harmsen, D.J.H. (author), Beerendonk, E.F. (author), Reus, A.A. (author), Krul, C.A.M. (author), Metz, D.H. (author), Ijpelaar, G.F. (author), TNO Kwaliteit van Leven (author)

The objective of this study was to determine the genotoxic activity of water after UV/H₂O₂ oxidation and GAC filtration. Pre-treated surface water from three locations was treated with UV/H₂O₂ with medium pressure (MP) lamps and passed through granulated activated carbon (GAC). Samples taken before and...

article 2011

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Een miljoen keer schoner dan schoon

Duisterwinkel, A.E. (author), Werij, H.G.C. (author)

article 2011

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PDR status for TROPOMI, the sentinel 5 Precursor instrument for air quality and climate observations

de Vries, J. (author), Voors, R. (author), Otter, G. (author), van der Valk, N.J.C. (author), Aben, I. (author), Hoogeveen, R. (author), Snel, R. (author), Kleipool, Q. (author), Veefkind, J.P. (author)

The Tropospheric Monitoring Instrument (TROPOMI) is being developed for launch in 2014 on GMES Sentinel 5 Precursor satellite. Global Monitoring for Environment and Security (GMES) is a joint initiative of the European Community (EC) and of the European Space Agency (ESA). TROPOMI is a passive sun backscatter spectrograph using the ultraviolet...

conference paper 2011

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Manufacturing and testing flexible microfluidic devices with optical and electrical detection mechanisms

TNO Industrie en Techniek (author), Ivan, M.G. (author), Vivet, F. (author), Meinders, E.R. (author)

Flexible microfluidic devices made of poly(dimethylsiloxane) (PDMS) were manufactured by soft lithography, and tested in detection of ionic species using optical absorption spectroscopy and electrical measurements. PDMS was chosen due to its flexibility and ease of surface modification by exposure to plasma and UV treatment, its transparency in...

conference paper 2010

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Ultra short pulse laser generated surface textures for anti-ice applications in aviation

Römer, G.W. (author), Del Cerro, D.A. (author), Sipkema, R.C.J. (author), Groenendijk, M.N.W. (author), Huis in 't Veld, A.J. (author), TNO Industrie en Techniek (author)

By laser ablation with ultra short laser pulses in the pico- and femto-second range, well controlled dual scaled micro- and nano-scaled surface textures can be obtained. The micro-scale of the texture is mainly determined by the dimensions of the laser spot, whereas the superimposed nano-structure is the result of so-called laser induced "self...

conference paper 2009

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TROPOMI, the solar backscatter satellite instrument for air quality and climate, heads towards detailed design

TNO Industrie en Techniek (author), de Vries, J. (author), Voors, R. (author), Mika, A. (author), Otter, G. (author), van der Valk, N.J.C. (author), Aben, I. (author), Hoogeveen, R. (author), Gloudemans, A. (author), Dobber, M.R. (author), Veefkind, J.P. (author), Levelt, P. (author)

The Tropospheric Monitoring Instrument (TROPOMI) is currently planned for launch on ESA's Sentinel 5 precursor satellite in the time frame of 2014. TROPOMI is an ultraviolet-to-SWIR wavelengths imaging spectrograph that uses two-dimensional detectors to register both the spectrum and the swath perpendicular to the flight direction. The swath is...

conference paper 2009

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TROPOMI: Solar backscatter satellite instrument for air quality and climate

TNO Industrie en Techniek (author), Vries, J.de (author), Laan, E.C. (author), Hoogeveen, R.W.M. (author), Jongma, R.T. (author), Aben, U. (author), Visser, H. (author), Boslooper, E.C. (author), Saari, H. (author), Dobber, M.R. (author), Veefkind, J.P. (author), Kleipool, Q. (author), Levelt, P.F. (author)

TROPOMI is a nadir-viewing grating-based imaging spectrograph in the line of OMI and SCIAMACHY. TROPOMI is part of the ESA Candidate Core Explorer Mission proposal TRAQ and also of the CAMEO satellite proposed for the US NRC decadal study. A TROPOMI-like instrument is part of the ESA/EU Sentinel 4&5 pre-phase A studies. TROPOMI covers the OMI...

conference paper 2007

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Study of wettability and improvement of adhesion of UV curable powder coatings on polypropylene substrates

TNO Industrie en Techniek (author), Castell, P. (author), Wouters, M.E.L. (author), Fischer, H. (author), de With, G. (author)

Different benzophenone type photoinitiators were photografted onto polypropylene. The polymer surfaces were analysed by means of contact angle measurements, UV spectroscopy, and FTIR-ATR. The modified samples showed a better wettability and higher surface energies increasing from 26 mN/m for pure polypropylene up to 36 mN/m for the modified...

article 2007

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The ozone monitoring instrument

Levelt, P.F. (author), van den Oord, G.H.J. (author), Dobber, M.R. (author), Mälkki, A. (author), Visser, H. (author), de Vries, J. (author), Stammes, P. (author), Lundell, J.O.V. (author), Saari, H. (author), TNO Industrie en Techniek (author)

The Ozone Monitoring Instrument (OMI) flies on the National Aeronautics and Space Adminsitration's Earth Observing System Aura satellite launched in July 2004. OMI is a ultraviolet/visible (UV/VIS) nadir solar backscatter spectrometer, which provides nearly global coverage in one day with a spatial resolution of 13 km × 24 km. Trace gases...

article 2006

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Large area liquid crystal monodomain field-effect transistors

TNO Industrie en Techniek (author), van Breemen, A.J.J.M. (author), Herwig, P.T. (author), Chlon, C.H.T. (author), Sweelssen, J. (author), Schoo, H.F.M. (author), Setayesh, S. (author), Hardeman, W.M. (author), Martin, C.A. (author), de Leeuw, D.M. (author), Valeton, J.J.P. (author), Bastiaansen, C.W.M. (author), Broer, D.J. (author), Popa-Merticaru, A.R. (author), Meskers, S.C.J. (author)

Butyl, hexyl, and decyl derivatives of the liquid-crystalline organic semiconductor 5,5″-bis(5-alkyl-2-thienylethynyl)-2,2′:5′, 2″-terthiophene were synthesized and studied with respect to their structural, optical, and electrical properties. By means of an optimized thermal annealing scheme the hexyl and decyl compounds could be processed into...

article 2006