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4 results on '"MICROCHANNEL plates"'

1. Photon‐counting MCP/Timepix detectors for soft X‐ray imaging and spectroscopic applications

Author

Tremsin, Anton S, Vallerga, John V, Siegmund, Oswald HW, Woods, Justin, De Long, Lance E, Hastings, Jeffrey T, Koch, Roland J, Morley, Sophie A, Chuang, Yi-De, and Roy, Sujoy

Subjects
Bioengineering, soft X-ray detectors, photon counting, microchannel plates, X-ray photon correlation spectroscopy, Timepix, Condensed Matter Physics, Optical Physics, Physical Chemistry (incl. Structural), Biophysics
Abstract

Detectors with microchannel plates (MCPs) provide unique capabilities to detect single photons with high spatial (

Published
2021

2. The Large Observatory for x-ray timing

Author

Feroci, M, Herder, JW den, Bozzo, E, Barret, D, Brandt, S, Hernanz, M, van der Klis, M, Pohl, M, Santangelo, A, Stella, L, Watts, A, Wilms, J, Zane, S, Ahangarianabhari, M, Albertus, C, Alford, M, Alpar, A, Altamirano, D, Alvarez, L, Amati, L, Amoros, C, Andersson, N, Antonelli, A, Argan, A, Artigue, R, Artigues, B, Atteia, J-L, Azzarello, P, Bakala, P, Baldazzi, G, Balman, S, Barbera, M, van Baren, C, Bhattacharyya, S, Baykal, A, Belloni, T, Bernardini, F, Bertuccio, G, Bianchi, S, Bianchini, A, Binko, P, Blay, P, Bocchino, F, Bodin, P, Bombaci, I, Bidaud, J-M Bonnet, Boutloukos, S, Bradley, L, Braga, J, Brown, E, Bucciantini, N, Burderi, L, Burgay, M, Bursa, M, Budtz-Jørgensen, C, Cackett, E, Cadoux, FR, Caïs, P, Caliandro, GA, Campana, R, Campana, S, Capitanio, F, Casares, J, Casella, P, Castro-Tirado, AJ, Cavazzuti, E, Cerda-Duran, P, Chakrabarty, D, Château, F, Chenevez, J, Coker, J, Cole, R, Collura, A, Cornelisse, R, Courvoisier, T, Cros, A, Cumming, A, Cusumano, G, D'Ai, A, D'Elia, V, Del Monte, E, de Luca, A, de Martino, D, Dercksen, JPC, de Pasquale, M, De Rosa, A, Del Santo, M, Di Cosimo, S, Diebold, S, Di Salvo, T, Donnarumma, I, Drago, A, Durant, M, Emmanoulopoulos, D, Erkut, MH, Esposito, P, Evangelista, Y, Fabian, A, Falanga, M, and Favre, Y

Subjects
X-ray timing, X-ray spectroscopy, X-ray imaging, compact objects, X-ray detectors, microchannel plates, astro-ph.IM
Abstract

The Large Observatory For x-ray Timing (LOFT) was studied within ESA M3 Cosmic Vision framework and participated in the final downselection for a launch slot in 2022-2024. Thanks to the unprecedented combination of effective area and spectral resolution of its main instrument, LOFT will study the behaviour of matter under extreme conditions, such as the strong gravitational field in the innermost regions of accretion flows close to black holes and neutron stars, and the supranuclear densities in the interior of neutron stars. The science payload is based on a Large Area Detector (LAD, 10 m2 effective area, 2-30 keV, 240 eV spectral resolution, 1° collimated field of view) and a Wide Field Monitor (WFM, 2-50 keV, 4 steradian field of view, 1 arcmin source location accuracy, 300 eV spectral resolution). The WFM is equipped with an on-board system for bright events (e.g. GRB) localization. The trigger time and position of these events are broadcast to the ground within 30 s from discovery. In this paper we present the status of the mission at the end of its Phase A study.

Published
2014

3. The large observatory for x-ray timing

Author

Feroci, M, Den Herder, JW, Bozzo, E, Barret, D, Brandt, S, Hernanz, M, Van Der Klis, M, Pohl, M, Santangelo, A, Stella, L, Watts, A, Wilms, J, Zane, S, Ahangarianabhari, M, Albertus, C, Alford, M, Alpar, A, Altamirano, D, Alvarez, L, Amati, L, Amoros, C, Andersson, N, Antonelli, A, Argan, A, Artigue, R, Artigues, B, Atteia, JL, Azzarello, P, Bakala, P, Baldazzi, G, Balman, S, Barbera, M, Van Baren, C, Bhattacharyya, S, Baykal, A, Belloni, T, Bernardini, F, Bertuccio, G, Bianchi, S, Bianchini, A, Binko, P, Blay, P, Bocchino, F, Bodin, P, Bombaci, I, Bonnet Bidaud, JM, Boutloukos, S, Bradley, L, Braga, J, Brown, E, Bucciantini, N, Burderi, L, Burgay, M, Bursa, M, Budtz-Jørgensen, C, Cackett, E, Cadoux, FR, Caïs, P, Caliandro, GA, Campana, R, Campana, S, Capitanio, F, Casares, J, Casella, P, Castro-Tirado, AJ, Cavazzuti, E, Cerda-Duran, P, Chakrabarty, D, Château, F, Chenevez, J, Coker, J, Cole, R, Collura, A, Cornelisse, R, Courvoisier, T, Cros, A, Cumming, A, Cusumano, G, D'ai, A, D'elia, V, Del Monte, E, De Luca, A, De Martino, D, Dercksen, JPC, De Pasquale, M, De Rosa, A, Del Santo, M, Di Cosimo, S, Diebold, S, Di Salvo, T, Donnarumma, I, Drago, A, Durant, M, Emmanoulopoulos, D, Erkut, MH, Esposito, P, Evangelista, Y, Fabian, A, Falanga, M, and Favre, Y

Subjects
X-ray timing, X-ray spectroscopy, X-ray imaging, compact objects, X-ray detectors, microchannel plates, astro-ph.IM
Abstract

The Large Observatory For x-ray Timing (LOFT) was studied within ESA M3 Cosmic Vision framework and participated in the final downselection for a launch slot in 2022-2024. Thanks to the unprecedented combination of effective area and spectral resolution of its main instrument, LOFT will study the behaviour of matter under extreme conditions, such as the strong gravitational field in the innermost regions of accretion flows close to black holes and neutron stars, and the supranuclear densities in the interior of neutron stars. The science payload is based on a Large Area Detector (LAD, 10 m2 effective area, 2-30 keV, 240 eV spectral resolution, 1° collimated field of view) and a Wide Field Monitor (WFM, 2-50 keV, 4 steradian field of view, 1 arcmin source location accuracy, 300 eV spectral resolution). The WFM is equipped with an on-board system for bright events (e.g. GRB) localization. The trigger time and position of these events are broadcast to the ground within 30 s from discovery. In this paper we present the status of the mission at the end of its Phase A study.

Published
2014

4. Thermal dependence of electrical characteristics of micromachined silica microchannel plates

Author

Tremsin, A S, Vallerga, J V, Siegmund, OHW, Beetz, C P, and Boerstler, R W

Subjects
Microchannel plates, Thermal properties
Abstract

Micromachined silica microchannel plates (MCPs) under development have a number of advantages over standard glass MCPs and open completely new possibilities in detector technologies. In this article we present the results of our studies on the thermal properties of silica microchannel plates (sMCPs). Similar to standard glass microchanel plates the resistance of silica MCPs was measured to change exponentially with temperature with a negative thermal coefficient of -0.036 per degreesC, somewhat larger than that of standard glass MCPs. The resistance also decreases linearly with the applied voltage, with the voltage coefficient of -3.1x10(-4) V-1. With the knowledge of these two coefficients, our thermal model allows the calculation of the maximum voltage, which can be applied to a given MCP without inducing a thermal runaway. A typical 25 mm diam, 240 mum thick sMCP with 6 mum pores has to have the resistance larger than similar to30 MOmega to operate safely at voltages up to 800 V. With this model we can also calculate the time required for a given silica MCP to reach the point of thermal equilibrium after a voltage increase. We hope that the ongoing efforts on a proper modification of the sMCP semiconducting layer will lead to the production of new MCPs with a small negative or even a positive thermal coefficient, reducing the possibility of thermal runaways of low-resistance MCPs required for high count rate applications. (C) 2004 American Institute of Physics.

Published
2004

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