Accès ouvert
2025
article
OpenAlex
Verena G. Leopold, Sebastian Karl, Jean‐Pierre Rivet, J. von Zanthier
Intensity interferometry is a reemerging astronomical technique for performing high angular resolution studies at visible wavelengths, benefiting immensely from the recent improvements in (single) photon detection instrumentation. Contrary to direct imaging or amplitude interferometry, intensity interferometry correlates light intensities rather than light …
de, fr
(code pays fourni par la source)
Accès ouvert
2025
article
OpenAlex
Yuriy Chushkin, Jonathan Correa, Alexandr Ignatenko, David Pennicard et autres
The fastest pixel array X-ray detectors can record images with nanosecond resolution. This is accomplished by storing only a few images in in-pixel memory cells. In this study, we demonstrate nanosecond resolution over a large number of images by operating a prototype …
fr, de
(code pays fourni par la source)
2025
conference-paper
OpenAlex
Sebastian Karl, Verena G. Leopold, Stefan Richter, Yury Prokazov et autres
In this proceeding we present a high throughput single photon counting system able to detect at high photon count rates with the potential to enhance the effectiveness of stellar intensity interferometry (SII) measurements. The system consists of a photon detection module, PhotonPix™, …
de
(code pays fourni par la source)
Accès ouvert
2024
preprint
OpenAlex
Verena G. Leopold, Sebastian Karl, Jean‐Pierre Rivet, J. von Zanthier
Intensity interferometry is a reemerging astronomical technique for performing high angular resolution studies at visible wavelengths, benefiting immensely from the recent improvements in (single) photon detection instrumentation. We developed an ultra-fast, single photon counting and highly stable intensity interferometry instrument for 1 …
fr
(code pays fourni par la source)
Accès ouvert
2024
article
OpenAlex
Jonathan Correa, Alexandr Ignatenko, David Pennicard, Sabine Lange et autres
TEMPUS is a new detector system being developed for photon science. It is based on the Timepix4 chip and, thus, it can be operated in two distinct modes: a photon-counting mode, which allows for conventional full-frame readout at rates up to 40 …
de, fr
(code pays fourni par la source)
Accès ouvert
2024
article
OpenAlex
Manuel Bojer, Juergen Eckert, Sebastian Karl, Steffen Richter et autres
Abstract To obtain spatial information about an arbitrary atomic distribution in x-ray structure analysis, e.g. in molecules or proteins, the standard method is to measure the intensity in the far field, i.e. the first-order photon correlation function of the coherently scattered x-ray …
de
(code pays fourni par la source)
Accès ouvert
2024
article
OpenAlex
Sebastian Karl, Stefan Richter, J. von Zanthier
Abstract Intensity interferometry is a re-emerging interferometry tool that alleviates some of the challenges of amplitude interferometry at the cost of reduced sensitivity. We demonstrate the feasibility of intensity interferometry with fast single-photon counting detectors at small telescopes by utilizing a telescope …
de, us
(code pays fourni par la source)
Accès ouvert
2024
preprint
OpenAlex
Jonathan Correa, Alexandr Ignatenko, David Pennicard, Sabine Lange et autres
A readout system based on the Timepix4 ASIC, is being developed for photon science. The TEMPUS detector can be operated in two distinct modes: a photon counting mode, which allows for conventional full-frame readout at rates up to 40 kfps; and an …
de, fr
(code pays fourni par la source)
Accès ouvert
2023
article
OpenAlex
F. Trost, Kartik Ayyer, Mauro Prasciolu, Holger Fleckenstein et autres
We demonstrate that x-ray fluorescence emission, which cannot maintain a stationary interference pattern, can be used to obtain images of structures by recording photon-photon correlations in the manner of the stellar intensity interferometry of Hanbury Brown and Twiss. This is achieved utilizing …
de, se
(code pays fourni par la source)
Accès ouvert
2022
article
OpenAlex
Manuel Bojer, Zixin Huang, Sebastian Karl, Stefan Richter et autres
Abstract Astronomical imaging can be broadly classified into two types. The first type is amplitude interferometry, which includes conventional optical telescopes and very large baseline interferometry (VLBI). The second type is intensity interferometry, which relies on Hanbury Brown and Twiss-type measurements. At …
de, au, gb
(code pays fourni par la source)
Accès ouvert
2022
article
OpenAlex
Sebastian Karl, Andreas Zmija, Stefan Richter, Naomi Vogel et autres
ABSTRACT Stellar intensity interferometers correlate photons within their coherence time and could overcome the baseline limitations of existing amplitude interferometers. Intensity interferometers do not rely on phase coherence of the optical elements and thus function without high-grade optics and light combining delay …
de
(code pays fourni par la source)