A new gravitation wave observatory is being built in Japan. This facility is a big Michelson interferometer where the mirrors and sensors will be made cryogenic down to 4 K. The problem is that: the heat cannot be transported out of the mirror by its surroundings because the whole system is in an ultra-high …

Within the semiconductor industry the demand for ever decreasing chip and resistor sizes has forced the use of extreme ultraviolet (EUV) waves in lithography machines. The older generation lithography machines used lenses to focus the waves. These lenses aren't transparent for EUV waves with a wavelength …

A laboratory test setup is built to transfer and actively stabilize an ultrastable signal, obtained from a laser with sub-Hz linewidth, trough a 5 km long fiber link. The fiber noise is measured and compensated via a feedback loop acting on an AOM that can change the frequency (and therefore the phase) …

Resonance-enhanced laser-induced breakdown spectroscopy was used to increase the elemental sensitivity of laser-induced breakdown spectroscopy. In resonance-enhanced laser-induced breakdown spectroscopy, two lasers are used. The first laser creates a plasma, and the second laser re excites the most …

In dit verslag zal aandacht worden geschonken aan stijgtijden van geluidsgebeurtenissen in de industrie. Uit onderzoek is gebleken dat de stijgtijd van een geluidsgebeurtenis als kenmerkend beschouwd kan worden voor de daardoor optredende verstoring, boven de huidige methodiek van de beoordeling van …

De World Conference on Physics Education vond plaats in Istanbul van 1 – 6 juli met als thema The Role of Context, Culture,and Representations in Physics Teaching and Learning. Deze conferentie wordt eens in de vier jaar door de Europese, Aziatische, en Amerikaanse natuurkunde onderwijs organisaties …

A high resolution infrared spectrum of species formed in a nitrogen-hydrogen plasma expansion was recorded. A cavity ring down detection scheme was used to record a rotationally resolved spectrum in the region from 3300 cm-1 to 3380 cm-1. Using the relative intensities and line positions it was determined …

The Pierre Auger group is studying ultra-high energy cosmic rays. Cosmic rays are charged particles which permanently hit and penetrate the atmosphere of the Earth. They will at a certain moment collide with nuclei in the atmosphere, like nitrogen. The results of such an interaction are new particles, …

Voor de afstudeeropdracht bij Deltares is er onderzoek gedaan naar de stijgsnelheid van luchtbellen in hellende leidingen. Dit is gedaan om meer kennis te krijgen over slug stroming. Slug stroming is een meerfase-stromingspatroon waarbij vloeistof en gas samen door een transportleiding stromen, het gas …

Single Fiber Reflectance spectroscopy (SFR) can be used to determine tissue optical properties such as scattering and absorption. The SFR technique employs a semi-empirical modal, which contains a parameter that is dependent on the fiber numerical aperture, NA . However, the NA is a wavelength dependent …