Explanipedia

Simulation and Measurement of Out-of-Band Resonances for the FDM Readout of a TES Bolometer Open

A. Aminaei, Hiroki Akamatsu, A. C. T. Nieuwenhuizen, D. Vaccaro, Qian Wang , et al. · 2023

With applications in cosmology, infrared astronomy and CMB survey, frequency-division multiplexing (FDM) proved to be a viable readout for transition-edge sensors (TES). We investigate the occurrence of out-of-band resonances (OBR) which c…

Cornelis de Jager: In Memoriam Open

Robert J. Rutten, O. Engvold, A. C. T. Nieuwenhuizen · 2022

Demonstration of MHz frequency domain multiplexing readout of 37 transition edge sensors for high-resolution x-ray imaging spectrometers Open

Hiroki Akamatsu, D. Vaccaro, L. Gottardi, J. van der Kuur, C. P. de Vries , et al. · 2021

We report on the development and demonstration of MHz frequency domain multiplexing (FDM) technology to readout arrays of cryogenic transition edge sensor (TES) x-ray microcalorimeters. In our FDM scheme, TESs are AC biased at different re…

Frequency shift algorithm: Design of a baseband phase locked loop for frequency-domain multiplexing readout of x-ray transition-edge sensor microcalorimeters Open

Paul van der Hulst, J. van der Kuur, A. C. T. Nieuwenhuizen, D. Vaccaro, Hiroki Akamatsu , et al. · 2021

The Transition-Edge Sensor (TES) is an extremely sensitive device, which is used to measure the energy of individual x-ray photons. For astronomical spectrometry applications, SRON develops a frequency domain multiplexing readout system fo…

A Sixteen-years Delay in Sun-related Terrestrial Warming Open

A. C. T. Nieuwenhuizen, C. de Jager, H. Nieuwenhuijzen · 2020

In an earlier paper De Jager et al. (2018) studied the relation between the intensity variations of the variable equatorial and polar solar magnetic energy sources and that of the average terrestrial northern hemisphere ground temperature.…

Active Tuning of the Resonance Frequencies of LC Bandpass Filters for Frequency Domain Multiplexed Readout of TES Detector Arrays Open

J. van der Kuur, L. Gottardi, Hiroki Akamatsu, A. C. T. Nieuwenhuizen, R. den Hartog , et al. · 2018

Efficient use of the available frequency space for frequency domain multiplexing is essential for space-based TES detector applications such as the X-IFU instrument on the Athena X-ray telescope. For cross talk reasons, there exists a lowe…

The relation between the average northern hemisphere ground temperature and solar equatorial and polar magnetic activity Open

C. de Jager, A. C. T. Nieuwenhuizen, S. Duhau · 2018

Dynamics of the verge and foliot clock escapement Open

P. Hoyng, A. C. T. Nieuwenhuizen · 2016

The verge and foliot escapement has received relatively little attention in horology, despite the fact that it has been used in clocks for ages. We analyse the operation of a verge and foliot escapement in stationary swing. It is driven by…

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