Dr. Matthew J. Clapp Profile

Dr. Matthew J. Clapp

Senior Electronic Engineer at STFC Rutherford Appleton Lab

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Publications (12)

Proceedings Article | 11 June 2021 Open Access

WSO-UV mission WUVS instrument FUV-UV CCD detectors qualification campaign main results

Andrey Shugarov, Mikhail Sachkov, Graham Bruce, Mark Robbins, Andrew Walker, Nick Waltham, Matthew Clapp, Mike Salter, Gayatri Patel, Sergey Kuzin, Eugene Vishnyakov, Alexey Kirichenko, Andrey Pertsov, Denis Ivlyushkin, Pavel Zavertkin, Anton Nikolenko

Proceedings Volume 11852, 118525D (2021) https://doi.org/10.1117/12.2599948

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Proceedings Article | 21 December 2020 Poster + Paper

Development of an imaging system for the THESEUS SXI instrument

Melissa McHugh, Ian Hutchinson, Hannah Natasha Lerman, Paul O'Brien, Richard Willingale, Charlotte Feldman, Andy Beardmore, Roisin Speight, Alex Lodge, Paul Drumm, Nick Waltham, Matthew Clapp

Proceedings Volume 11444, 114448Y (2020) https://doi.org/10.1117/12.2563060

KEYWORDS: Imaging systems, X-ray imaging, Imaging spectroscopy, Algorithm development, X-ray astronomy, X-rays, Sensors, Data acquisition, Spectroscopes, Gamma radiation

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Proceedings Article | 6 July 2018 Paper

A pair of custom ASICs for bias generation and clock buffering in space-based CCD camera systems

Q. Morrissey, S. Bell, L. Jones, M. Prydderch, M. Torbet, N. Waltham, M. Clapp

Proceedings Volume 10709, 107092T (2018) https://doi.org/10.1117/12.2312623

KEYWORDS: Clocks, Capacitance, Charge-coupled devices, Imaging systems, Power supplies, Transistors, Multiplexers, CCD cameras, Radiation, Space sensors

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A pair of radiation hardened high-voltage mixed signal Application Specific Integrated Circuits (ASICs) are described that provide the biasing and clocking functions required to drive large format CCDs used for space-borne cameras and focal planes. The use of these ASICs allows the CCD drive electronics to be realised in a compact and energy efficient manner saving volume, mass, and power when compared with traditional space-qualified discrete implementations. The STAR ASIC provides 24 independent voltage outputs with a 32.736V range at 10 bit resolution and with <100μV noise. Each voltage output provides a drive current of up to +/-20mA and is stable for capacitive loads of up to 10μF. An on-board telemetry system featuring a 12-bit ADC and programmable gain buffer allows internal monitoring of the output voltages plus up to 32 single ended and 4 differential external voltages, such as from PRT bridge circuits for temperature monitoring. A simple SPI serial interface provides control and telemetry read back, while all required voltages and currents are generated from internal bandgap circuits. The COMET ASIC provides 6 fully independent clock buffering channels each with individually programmable rising/falling current drive and high/low voltage levels. Output voltage levels are controlled with integrated fast response regulators that operate over a 16.368V range without the need for external decoupling capacitors. Clock drive currents can be adjusted for the load capacitance and output slew rate required over a 409.6mA range, with edge speeds <15ns achievable for small loads. Setup and control of the ASIC is also via an SPI interface with integrated safety features to ensure correct sequencing of channel operation and to prevent reverse biasing of the driver programmable voltage supplies. The COMET ASIC also features an under-voltage lock out circuit to safeguard the chip in the event of unexpected power loss. All necessary biases are generated internally and only supply decoupling, a single filtering capacitor, and a resistive divider are required to operate the device. Both devices have been designed in a commercial 0.35μm 50V tolerant HV CMOS technology using Triple Module Redundancy (TMR) and established layout techniques to harden against Total Ionising Dose (TID), Single Event Upset (SEU), and Single Event Latch-up (SEL) radiation effects. The latch-up detection circuits often needed for space electronics are therefore not required for either ASIC. Details of the architectures and circuit implementations of both ASICs will be presented. Test results from manufactured devices will be shown under representative load conditions.

Proceedings Article | 20 November 2017 Open Access

Systems approach to the design of the CCD sensors and camera electronics for the AIA and HMI instruments on solar dynamics observatory

N. Waltham, S. Beardsley, M. Clapp, J. Lang, P. Jerram, P. Pool, G. Auker, D. Morris, D. Duncan

Proceedings Volume 10565, 1056503 (2017) https://doi.org/10.1117/12.2309196

KEYWORDS: Charge-coupled devices, CCD cameras, Electronics, Cameras, Optical amplifiers, Imaging systems, Clocks, Video, Observatories, Amplifiers

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Proceedings Article | 25 September 2017 Open Access

The design and development of low- and high-voltage asics for space-borne CCD cameras

N. Waltham, Q. Morrissey, M. Clapp, S. Bell, L. Jones, M. Torbet

Proceedings Volume 10562, 105623C (2017) https://doi.org/10.1117/12.2296085

KEYWORDS: Clocks, Charge-coupled devices, CCD cameras, Electronics, Video processing, Video, Optical amplifiers, Cameras, Transistors, Electrodes

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Proceedings Article | 25 September 2017 Open Access

Development of digital correlated double sampling (DCDS) camera electronics for the space-based world space observatory ultra-violet spectrograph mission

M. Clapp, M. Salter, G. Patel, N. Waltham, C. Hayes-Thakore

Proceedings Volume 10562, 105625C (2017) https://doi.org/10.1117/12.2296146

KEYWORDS: Charge-coupled devices, Electronics, Video, CCD cameras, Cameras, Clocks, Ultraviolet radiation, Spectrographs, Astronomical imaging, Space operations

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Proceedings Article | 8 August 2016 Paper

Management of the camera electronics programme for the World Space Observatory ultraviolet WUVS instrument

Gayatri Patel, Matthew Clapp, Mike Salter, Nick Waltham, Sarah Beardsley

Proceedings Volume 9911, 99110Q (2016) https://doi.org/10.1117/12.2232575

KEYWORDS: Electronics, Ultraviolet radiation, Cameras, ITAR, Charge-coupled devices, Electronics, Fermium, Frequency modulation, Computer aided design, Manufacturing, Power supplies

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Proceedings Article | 29 July 2016 Paper

Development of low-noise CCD drive electronics for the World Space Observatory Ultraviolet Spectrograph subsystem

Mike Salter, Matthew Clapp, James King, Tom Morse, Ionut Mihalcea, Nick Waltham, Chris Hayes-Thakore

Proceedings Volume 9915, 99150Y (2016) https://doi.org/10.1117/12.2231289

KEYWORDS: Electronics, Charge-coupled devices, Ultraviolet radiation, Spectrographs, Video, Space observatories, CCD cameras, Clocks, CCD image sensors, Space operations

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World Space Observatory Ultraviolet (WSO-UV) is a major Russian-led international collaboration to develop a large space-borne 1.7 m Ritchey-Chrétien telescope and instrumentation to study the universe at ultraviolet wavelengths between 115 nm and 320 nm, exceeding the current capabilities of ground-based instruments. The WSO Ultraviolet Spectrograph subsystem (WUVS) is led by the Institute of Astronomy of the Russian Academy of Sciences and consists of two high resolution spectrographs covering the Far-UV range of 115-176 nm and the Near-UV range of 174-310 nm, and a long-slit spectrograph covering the wavelength range of 115-305 nm. The custom-designed CCD sensors and cryostat assemblies are being provided by e2v technologies (UK). STFC RAL Space is providing the Camera Electronics Boxes (CEBs) which house the CCD drive electronics for each of the three WUVS channels.

This paper presents the results of the detailed characterisation of the WUVS CCD drive electronics. The electronics include a novel high-performance video channel design that utilises Digital Correlated Double Sampling (DCDS) to enable low-noise readout of the CCD at a range of pixel frequencies, including a baseline requirement of less than 3 electrons rms readout noise for the combined CCD and electronics system at a readout rate of 50 kpixels/s. These results illustrate the performance of this new video architecture as part of a wider electronics sub-system that is designed for use in the space environment. In addition to the DCDS video channels, the CEB provides all the bias voltages and clocking waveforms required to operate the CCD and the system is fully programmable via a primary and redundant SpaceWire interface. The development of the CEB electronics design has undergone critical design review and the results presented were obtained using the engineering-grade electronics box. A variety of parameters and tests are included ranging from general system metrics, such as the power and mass, to more detailed analysis of the video performance including noise, linearity, crosstalk, gain stability and transient response.

Proceedings Article | 27 July 2016 Paper

DCDS weighted averaging theory and development for improved noise filtering in scientific CCD applications

Matthew Clapp, Ionut Mihalcea, Tom Morse, Mike Salter, Nick Waltham

Proceedings Volume 9915, 99151S (2016) https://doi.org/10.1117/12.2231619

KEYWORDS: Charge-coupled devices, Electronics, Digital filtering, Image filtering, Interference (communication), Image processing, Electronic filtering, Clocks, Video, Electrons

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Proceedings Article | 12 October 2015 Paper

Sensor system development for the WSO-UV (World Space Observatory–Ultraviolet) space-based astronomical telescope

Chris Hayes-Thakore, Stephen Spark, Peter Pool, Andrew Walker, Matthew Clapp, Nick Waltham, Andrey Shugarov

Proceedings Volume 9639, 96390U (2015) https://doi.org/10.1117/12.2199922

KEYWORDS: Charge-coupled devices, Ultraviolet radiation, Satellites, Sensors, Spectrometers, Spectrographs, Photons, Electronics, Astronomical telescopes, Quantum efficiency

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Proceedings Article | 25 September 2012 Paper

A gigapixel commercially manufactured cryogenic camera for the J-PAS 2.5m survey telescope

P. Jorden, M. Bastable, M. Clapp, S. Darby, M. Dryer, T. Eaton, G. Fenemore-Jones, P. Jerram, A. Marin-Franch, I. Palmer, R. Pittock, P. Pool, R. Rennshaw, K. Taylor, N. Waltham, P. Wheeler

Proceedings Volume 8453, 84530J (2012) https://doi.org/10.1117/12.926765

KEYWORDS: Cameras, Charge-coupled devices, Telescopes, Electronics, CCD cameras, Cryogenics, Sensors, Interfaces, Control systems, Data conversion

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Proceedings Article | 25 September 2012 Paper

Development of a test system for the characterisation of DCDS CCD readout techniques

M. Clapp

Proceedings Volume 8453, 84531D (2012) https://doi.org/10.1117/12.925393

KEYWORDS: Charge-coupled devices, Data modeling, Video, Signal processing, Interference (communication), Performance modeling, Electronics, Amplifiers, CCD cameras, Video processing

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Showing 5 of 12 publications

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