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de Wit, Martin (author), Gottardi, L (author), Nagayoshi, K. (author), Akamatsu, H. (author), de Bruijn, M.P. (author), Ridder, M.L. (author), Taralli, E. (author), Vaccaro, D. (author), Gao, J.R. (author)
In the early 2030s, ESAs new X-ray observatory, Athena, is scheduled to be launched. It will carry two main<br/>instruments, one of which is the X-ray Integral Field Unit (X-IFU), an X-ray imaging spectrometer, which will consist of an array of several thousand transition-edge sensors (TESs) with a proposed energy resolution of 2.5 eV for photon...
conference paper 2022
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Vaccaro, Davide (author), Akamatsu, Hiroki (author), Bruijn, Marcel (author), Gottardi, Luciano (author), Den Hartog, Roland (author), Van Der Kuur, Jan (author), Ridder, Marcel (author), De Wit, Martin (author), Gao, J.R. (author)
We have measured and characterized the thermal crosstalk in two different arrays of transition-edge sensor (TES) X-ray microcalorimeters with frequency-domain multiplexing (FDM) readout. The TES arrays are fabricated at SRON and are a 8 × 8 and a 32 × 32 'kilo-pixel' uniform array. The amount of crosstalk is evaluated as the ratio between the...
journal article 2022
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Taralli, E. (author), de Wit, M. (author), Gottardi, L. (author), Nagayoshi, K. (author), Visser, S. (author), Ridder, M.L. (author), Akamatsu, H. (author), Vaccaro, D. (author), Gao, J.R. (author)
Large arrays of transition edge sensors (TESs) are the baseline for a number of future space observatories. For instance, the X-ray integral field unit (X-IFU) instrument on board the ATHENA space telescope will consist of ∼ 3000 TESs with high energy resolution (2eV at X-ray energies up to 7 keV). In this contribution we report on the...
journal article 2022
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Nagayoshi, K. (author), de Wit, M. (author), Taralli, E. (author), Visser, S. (author), Ridder, M. L. (author), Gottardi, L. (author), Akamatsu, H. (author), Vaccaro, D. (author), Gao, J.R. (author)
We report measured T<sub>c</sub> of superconducting Ti/Au bilayer strips with a width W varying from 5 to 50 µm. The strips were fabricated based on a Ti/Au bilayer that consists of a 41-nm-thick Ti layer to which a 280-nm-thick Au layer was added. We find that the T<sub>c</sub> drops as W decreases and the declining trend almost perfectly...
journal article 2022
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de Wit, M. (author), Gottardi, L (author), Ridder, Marcel L. (author), Nagayoshi, K. (author), Taralli, E. (author), Akamatsu, H. (author), Vaccaro, D. (author), den Herder, J. W.A. (author), de Bruijn, M.P. (author), Gao, J.R. (author)
Transition-edge-sensor (TES) microcalorimeters and bolometers are used for a variety of applications.The sensors are based on the steep temperature-dependent resistance of the normal-to-superconducting transition, and are thus intrinsically sensitive to magnetic fields. Conventionally the detectors are shielded from stray magnetic fields using...
journal article 2022
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Holub, M. (author), Birnie, A.T.F. (author), Japaridze, A. (author), van der Torre, J. (author), Ridder, Maxime den (author), de Ram, C. (author), Pabst, Martin (author), Dekker, C. (author)
Chromosome structure and function is studied using various cell-based methods as well as with a range of in vitro single-molecule techniques on short DNA substrates. Here, we present a method to obtain megabase-pair-length deproteinated DNA for in vitro studies. We isolated chromosomes from bacterial cells and enzymatically digested the...
journal article 2022
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Wapenaar, C.P.A. (author), Snieder, Roel (author), Ridder, Sjoerd de (author), Slob, E.C. (author)
Marchenko redatuming, imaging, monitoring and multiple elimination methods are based on Green’s function representations, with the underlying assumption that the wave field in the subsurface can be decomposed into downgoing and upgoing waves and that evanescent waves can be neglected. In this paper we show that up/down decomposition in the...
book chapter 2021
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D'andrea, Matteo (author), Taralli, Emanuele (author), Akamatsu, Hiroki (author), Gottardi, Luciano (author), Nagayoshi, Kenichiro (author), Ravensberg, Kevin (author), Ridder, Marcel L. (author), Vaccaro, Davide (author), De Vries, Cor P. (author), De Wit, Martin (author), Hoogeveen, Ruud W.M. (author), Gao, J.R. (author)
We are developing a kilo-pixels Ti/Au TES array as a backup option for Athena X-IFU. Here we report on single-pixel performance of a 32 × 32 array operated in a Frequency Division Multiplexing (FDM) readout system, with bias frequencies in the range 1-5 MHz. We have tested the pixels response at several photon energies, by means of a 55Fe...
journal article 2021
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Wang, Q. (author), Khosropanah, P. (author), Van Der Kuur, J. (author), de Lange, G. (author), Audley, M. D. (author), Aminaei, A. (author), Ridder, M.L. (author), Van Der Linden, A. J. (author), Bruijn, M. P. (author), Gao, J.R. (author)
We demonstrate multiplexing readout of 60 transition edge sensor (TES) bolometers operating at 90 mK using a frequency division multiplexing readout chain with bias frequencies ranging from 1 to 3.5 MHz and with a typical frequency spacing of 32 kHz. The readout chain starts with a two-stage SQUID amplifier and has a noise level of 9.5 pA/ Hz...
journal article 2021
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de Wit, M. (author), Gottardi, L. (author), Taralli, E. (author), Nagayoshi, K. (author), Ridder, M.L. (author), Akamatsu, H. (author), Bruijn, M. P. (author), Hoogeveen, R. W.M. (author), Gao, J.R. (author)
Transition-edge sensors (TESs) are the selected technology for future spaceborne x-ray observatories, such as Athena, Lynx, and HUBS. These missions demand thousands of pixels to be operated simultaneously with high energy-resolving power. To reach these demanding requirements, every aspect of the TES design has to be optimized. Here we...
journal article 2021
document
Wapenaar, C.P.A. (author), Ridder, Sjoerd de (author)
The propagator matrix “propagates” a full wave field from one depth level to another, accounting for all propagation angles and evanescent waves. The Marchenko focusing function forms the nucleus of data-driven Marchenko redatuming and imaging schemes, accounting for internal multiples. These seemingly different concepts appear to be closely...
journal article 2021
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Taralli, E. (author), Pobes, C. (author), Khosropanah, P. (author), Fabrega, L. (author), Camón, A. (author), Gottardi, L. (author), Nagayoshi, K. (author), Ridder, M.L. (author), Bruijn, M. P. (author), Gao, J.R. (author)
Transition-edge sensors (TESs) are used as very sensitive thermometers in microcalorimeters aimed at detection of different wavelengths. In particular, for soft X-ray astrophysics, science goals require very high-resolution microcalorimeters which can be achieved with TESs coupled to suitable absorbers. For many applications, there is also...
journal article 2020
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Ridder, M. L. (author), Nagayoshi, K. (author), Bruijn, M. P. (author), Gottardi, L. (author), Taralli, E. (author), Khosropanah, P. (author), Akamatsu, H. (author), van der Kuur, J. (author), Ravensberg, K. (author), Visser, S. (author), Nieuwenhuizen, A. C.T. (author), Gao, J.R. (author), den Herder, J. W. (author)
Superconducting transition-edge sensors (TESs) are highly sensitive detectors. Based on the outstanding performance on spectral resolution, the X-ray integral field unit (X-IFU) instrument on-board athena will be equipped with a large array of TES-based microcalorimeters. For optimal performance in terms of the energy resolution, it is...
journal article 2020
document
Gan, Y. (author), Mirzaei, B. (author), van der Poel, S. (author), Silva, Jose R.G. (author), Finkel, M. (author), Eggens, Martin (author), Ridder, M.L. (author), Khalatpour, Ali (author), Gao, J.R. (author)
We present a terahertz spatial filter consisting of two back-to-back (B2B) mounted elliptical silicon lenses and an opening aperture defined on a thin gold layer between the lenses. The beam filtering efficiency of the B2B lens system is investigated by simulation and experiment. Using a unidirectional antenna coupled 3rd-order distributed...
journal article 2020
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Lago, Jesus (author), Sogancioglu, Ecem (author), Suryanarayana, Gowri (author), Ridder, Fjo De (author), De Schutter, B.H.K. (author)
Due to the increasing integration of renewable sources in the electrical grid, electricity generation is expected to become more uncertain. In this context, seasonal thermal energy storage systems (STESSs) are key to shift the delivery of renewable energy sources and tackle their uncertainty problems. In this paper, we propose an optimal...
journal article 2019
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Nagayoshi, K. (author), Ridder, M. L. (author), Bruijn, M. P. (author), Gottardi, L. (author), Taralli, E. (author), Khosropanah, P. (author), Akamatsu, H. (author), Visser, S. (author), Gao, J.R. (author)
We are developing a transition edge sensor (TES) microcalorimeter array based on a Ti/Au superconducting bilayer, as a backup option for the X-IFU instrument on the Athena X-ray observatory. The array is read out by a frequency-division multiplexing readout system using a 1–5 MHz frequency band. Extensive research collaborations between NASA...
journal article 2019
document
Taralli, E. (author), Khosropanah, P. (author), Gottardi, L. (author), Nagayoshi, K. (author), Ridder, M. L. (author), Bruijn, M. P. (author), Gao, J.R. (author)
The next generation of Far-infrared and X-ray space observatories will require detector arrays with thousands of transition edge sensor (TES) pixel. It is extremely important to have a tool that is able to characterize all the pixels and that can give a clear picture of the performance of the devices. In particular, we refer to those aspects...
journal article 2019
document
Gottardi, L. (author), Smith, S.J. (author), Kozorezov, A. (author), Akamatsu, H. (author), Bruijn, M. P. (author), Chervenak, J. A. (author), Gao, J.R. (author), Jackson, B. D. (author), Ridder, M. (author)
Frequency-division multiplexing is the baseline read-out system for large arrays of superconducting transition-edge sensors (TES’s) under development for the X-ray and infrared instruments like X-IFU (Athena) and SAFARI, respectively. In this multiplexing scheme, the sensors are ac-biased at different frequencies from 1 to 5 MHz and operate...
journal article 2018
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Audley, Michael D. (author), De Lange, Gert (author), Gao, J.R. (author), Khosropanah, Pourya (author), Hijmering, Richard (author), Ridder, Marcel (author), Mauskopf, Philip D. (author), Morozov, Dmitry (author), Trappe, Neil A. (author), Doherty, Stephen (author)
The next generation of far infrared space observatories will require extremely sensitive detectors that can be realized only by combining extremely low intrinsic noise with high optical efficiency. We have measured the broad-band optical response of ultra-sensitive transtion edge sensor (TES) bolometers (NEP ≈ 2 aW / Hz) in the 30-60-μm band...
journal article 2016
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Hijmering, R. A. (author), den Hartog, R (author), Ridder, M. (author), Van Der Linden, A. J. (author), Van Der Kuur, J. (author), Gao, J.R. (author), Jackson, B. (author)
In this paper we present the results of our 176-pixel prototype of the FDM readout system for SAFARI, a TES-based focal-plane instrument for the far-IR SPICA mission. We have implemented the knowledge obtained from the detailed study on electrical crosstalk reported previously. The effect of carrier leakage is reduced by a factor two, mutual...
conference paper 2016
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