Ing. D.J. Thoen

Ing. D.J. Thoen

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Expertise

Cleanroom processing: development and fabrication; (Reactive) sputter deposition of superconductive materials; Electron beam patterning; Scanning electron microscopy); Cryogenic measurements; vacuum technology; packaging, logistics and (international) shipments.

Biography

Ing. David Thoen (1978) is a cleanroom engineer at the Terahertz Sensing group. In 2008 he received his BSc. Applied Physics with honors at Fontys University of Applied Sciences, Eindhoven.

He has been working as a microwave engineer at FOM Institute Rijnhuizen (now DIFFER) since 2007.

Since 2010 he is working at TUD on the microfabrication and development of far-infrared detectors for astronomy. Under supervision of professor Dr.Ir. Teun Klapwijk (e.m.) he worked on superconductor-insulator-superconductor (SIS) detectors for Atacama-desert based telescopes ALMA and APEX. Since 2012 he has been working with professor dr. ir. Jochem Baselmans and dr. Akira Endo on microwave-kinetic-inductance detectors (MKID) based instruments like DESHIMA and AMKID. In 2015 he joined the Terahertz Sensing group, which is led by professor Andrea Neto, professor Nuria Llombard and professor dr. ir. Jochem Baselmans.

He has extensive experience in cleanroom process development and fabrication, vacuum and cryogenic technology, signal processing, microwave technology. In 2017 he was responsible for customs arrangements, logistics and shipment of the DESHIMA instrument from TU Delft campus to the ASTE telescope and assisted in integration and installation of the instrument in the telescope. David was responsible for PR of the campaign, delivering two short documentaries.

He (co-)authored over 30 peer-reviewed papers and manuscripts.

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Academic background

David received his B.S. degree in applied physics (with honors) in 2008 at the Fontys University of Technology in Eindhoven for the development of a real-time Fast-Fourier-transform based mm-wave spectrometer. From 2007 till 2010 he worked as a microwave engineer at the Dutch Institute for Fundamental Energy Research Nieuwegein, working on microwave diagnostics for real-time control of electron-cyclotron resonance heating of nuclear fusion plasmas in tokamaks. From 2010 he worked at the Delft University of Technology at the Cosmo Nanoscience group, working on the development and fabrication of terahertz superconducting Niobium-based mixers for ALMA Band 9 and APEX Champ+. Since 2015 he is working in the Terahertz Sensing group (TUD), focusing on reactive sputtering of Niobium-Titanium-Nitride and quality control of thin films and is responsible for fabrication and process development MKID. He authored or co-authored over 30 peer-reviewed papers. His professional experience: reactive magnetron sputtering,wet and dry etching techniques, optical and electron beam lithography, scanning electron microscopy, metrology of thin layers, cryogenic measurements. He was member of the 2017-team who succesfully installed the DESHIMA spectrometer on the ASTE telescope (5000m altitude) in the Atacama desert. First light of this novell and groundbreaking spectrometer was on October 16 2017.

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