Dr Michael Aspinall

International Senior Lecturer (BJTU)

Research Interests

Dr Aspinall's research began during his degree in Mechatronic Engineering (2005) with contributions towards the design and implementation of an advanced neutron spectrometer funded by an EPSRC Instrumentation Development Award (GR/R38538/01). His PhD (2008) was sponsored by the Think Crime! EPSRC research project (EP/C008022/1) which formed the DISTINGUISH consortium. His work here specifically focused on real-time digital assay of mixed radiation fields with prominent developments in real-time, digital pulse-shape discrimination of neutrons and gamma rays. Further extensive work led to the embodiment of these findings into technology with a TRL 9 that has served several nuclear establishments supporting additional research in nuclear safeguards, non-proliferation, neutron imaging and fast-neutron multiplicity analysis. Most notably he oversaw the delivery of the bespoke processing hardware and software for the ADRIANA liquid scintillator array at Lancaster University as part of the National Nuclear User Facility (NNUF) (EP/L025671/1). Recently, as part of a consortium of members from Manchester University and Lancaster University, he has secured a £1.6M EPSRC grant (EP/P018505/1) for the development of instrumentation and characterisation of extreme nuclear environments.

Automated Response Matching for Organic Scintillation Detector Arrays
Aspinall, M., Joyce, M., Cave, F., Plenteda, R., Tomanin, A. 21/07/2017 In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 861, p. 46-54. 9 p.
Journal article

Real-time capabilities of a digital analyzer for mixed-field assay using scintillation detectors
Aspinall, M., Joyce, M.J., Lavietes, A., Plenteda, R., Cave, F.D., Parker, H.M., Jones, A.R., Astromskas, V. 03/2017 In: IEEE Transactions on Nuclear Science. 64, 3, p. 945-950. 6 p.
Journal article

Active fast neutron singles assay of 235U enrichment in small samples of triuranium octoxide
Parker, H.M., Aspinall, M., Couture, A., Cave, F.D., Orr, C., Swinson, D., Joyce, M.J. 11/2016 In: Progress in Nuclear Energy. 93, p. 59-66. 8 p.
Journal article

Fast neutron tomography with real-time pulse-shape discrimination in organic scintillation detectors
Joyce, M.J., Agar, S., Aspinall, M., Beaumont, J., Colley, E., Colling, M., Dykes, J.A., Kardasopoulos, P., Mitton, K. 21/10/2016 In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 834, p. 36-45. 10 p.
Journal article

Portable, fast-neutron tomography with an isotopic source and organic scintillation detectors
Joyce, M.J., Agar, S., Aspinall, M.D., Colley, E., Colling, M., Dykes, J., Kardasopoulos, P., Mitton, K. 3/10/2016 In: 2015 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2015. Institute of Electrical and Electronics Engineers Inc. 2 p. ISBN: 9781467398633. Electronic ISBN: 9781467398626.
Conference contribution

A 16-channel real-time digital processor for pulse-shape discrimination in multiplicity assay
Joyce, M., Aspinall, M., Cave, F., Lavietes, A. 08/2014 In: IEEE Transactions on Nuclear Science. 61, 4, p. 2222-2227. 6 p.
Journal article

Real-time, fast neutron coincidence assay of plutonium with a 4-channel multiplexed analyzer and organic scintillators
Joyce, M., Gamage, K., Aspinall, M., Cave, F., Lavietes, A. 06/2014 In: IEEE Transactions on Nuclear Science. 61, 3 , p. 1340-1348. 9 p.
Journal article

Real-time measurements of production uranium fuel assemblies using a liquid scintillator-based active interrogation neutron detection system
Lavietes, A., Joyce, M., Plentada, R., Mascarenhas, M., Cronholm, M., Aspinall, M., Cave, F., Tomanin, A., Peerani, P. 10/2013
Conference paper

A 16-channel real-time digital processor for pulse-shape discrimination in multiplicity assay
Joyce, M., Aspinall, M., Cave, F., Lavietes, A. 06/2013 In: Advancements in Nuclear Instrumentation Measurement Methods and their Applications (ANIMMA), 2013 3rd International Conference on. Piscataway, N.J. : IEEE p. 1-5. 5 p.
Paper

Development of a liquid scintillator–based active interrogation system for LEU fuel assemblies
Lavietes, A., Plentada, R., Mascarenhas, N., Cronholm, L.M., Aspinall, M., Joyce, M., Tomanin, A., Peerani, P. 2013 In: Advancements in Nuclear Instrumentation Measurement Methods and their Applications (ANIMMA), 2013 3rd International Conference on. Piscataway, N.J. : IEEE p. 1-4. 4 p.
Paper

Development of a Mixed Field Analyser for Real-Time Scintillator-Based Fast Neutron Measurements
Joyce, M., Aspinall, M., Cave, F. 12/2012 UK A01887 ed. Department for Energy and Climate Change. 30 p.
Commissioned report

A 4-channel Multiplex Analyzer for Real-time, Parallel Processing of Fast Scintillators
Joyce, M., Gamage, K., Aspinall, M., Cave, F.D., Lavietes, A. 10/2012
Conference paper

Liquid scintillator-based neutron detector development
Lavietes, A., Plenteda, R., Mascarenhas, N., Cronholm, L.M., Aspinall, M., Joyce, M., Tomanin, A., Peerani, P. 2012 In: 2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record, NSS/MIC 2012. IEEE p. 230-244. 15 p. ISBN: 9781467320283. Electronic ISBN: 9781467320306.
Conference contribution

Real-time digital pulse-shape discrimination in non-hazardous fast liquid scintillation detectors: prospects for safety and security
Joyce, M., Aspinall, M., Cave, F., Lavietes, A. 2012 In: IEEE Transactions on Nuclear Science. 59, 4, p. 1245-1251. 7 p.
Journal article

Liquid scintillator neutron detection for real-time nuclear material assay
Lavietes, A., Pickrell, M., Plentada, R., Mascarenhas, M., Liguori, C., Aspinall, M., Joyce, M. 2011
Conference paper

Real-time digital pulse-shape discrimination in non-hazardous fast liquid scintillation detectors: prospects for safety and security
Joyce, M., Aspinall, M. 2011
Conference paper

The Design, Build and Test of a Digital Analyzer for Mixed Radiation Fields.
Joyce, M.J., Aspinall, M., Cave, F.D., Georgopoulos, K., Jarrah, Z. 14/10/2010 In: IEEE Transactions on Nuclear Science. 57, 5, p. 2625-2630. 6 p.
Journal article

A Wavelet Packet Transform Inspired Method of Neutron-Gamma Discrimination.
Shippen, D.I., Joyce, M.J., Aspinall, M. 10/2010 In: IEEE Transactions on Nuclear Science. 57, 5, p. 2617-2624. 8 p.
Journal article

A digital method for the discrimination of neutrons and γ rays with organic scintillation detectors using frequency gradient analysis.
Liu, G., Joyce, M.J., Ma, X., Aspinall, M. 06/2010 In: IEEE Transactions on Nuclear Science. 57, 3, p. 1682 -1691.
Journal article

Apparatus and Method for Radiation Analysis
Aspinall, M., Joyce, M.J. 2010
Patent

An investigation of the digital discrimination of neutrons and γ rays with organic scintillation detectors using an artificial neural network.
Liu, G., Aspinall, M., Ma, X., Joyce, M.J. 21/08/2009 In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 607, 3, p. 620-628. 9 p.
Journal article

A Wavelet Packet Transform Inspired Method of Neutron-Gamma Discrimination.
Shippen, D.I., Joyce, M.J., Aspinall, M. 2009
Conference paper

Sample-interpolation timing: an optimized technique for the digital measurement of time of flight for γ rays and neutrons at relatively low sampling rates.
Aspinall, M., Joyce, M.J., Mackin, R.O., Jarrah, Z., Boston, A.J., Nolan, P.J., Peyton, A.J., Hawkes, N.P. 2009 In: Measurement Science and Technology. 20, 1
Journal article

The design, build and test of a digital analyzer for mixed radiation fields.
Joyce, M.J., Aspinall, M., Cave, F.D., Georgopoulos, K., Jarrah, Z., Merelli, D. 2009
Conference paper

Digital processing of signals arising from organic liquid scintillators for applications in the mixed-field assessment of nuclear threats.
Aspinall, M., Joyce, M.J., Mackin,, R.O., Jarrah, Z., Peyton, A.J. 2008 In: Proceedings of SPIE. 7119, 71190G
Journal article

Verification of the digital discrimination of neutrons and γ rays using pulse gradient analysis by digital measurement of time of flight.
Aspinall, M., D’Mellow, B., Mackin, R.O., Joyce, M.J., Hawkes, N.P., Thomas, D.J., Jarrah, Z., Peyton, A.J., Nolan, P.J., Boston, A.J. 21/12/2007 In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 583, 2-3, p. 432-438. 7 p.
Journal article

Digital discrimination of neutrons and ?-rays in liquid scintillators using pulse gradient analysis.
Joyce, M.J., Aspinall, M., D'Mellow, B., Mackin, R.O. 21/07/2007 In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 578, 1, p. 191-197. 7 p.
Journal article

The empirical characterization of organic liquid scintillation detectors by the normalized average of digitized pulse shapes.
Aspinall, M., D’Mellow, B., Mackin, R.O., Joyce, M.J., Jarrah, Z., Peyton, A.J. 21/07/2007 In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 578, 1, p. 261-266. 6 p.
Journal article

Detection of explosive substances by tomographic inspection using neutron and gamma-ray spectroscopy.
Farahmand, M., Boston, A.J., Grint, A.N., Nolan, P.J., Joyce, M.J., Mackin, R.O., D’Mellow, B., Aspinall, M., Peyton, A.J., Silfhout, R.v. 04/2007 In: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 261, 1-2, p. 396-400. 5 p.
Journal article

Digital Pulse Pile-up Management in Organic Liquid Scintillators.
Aspinall, M., D'Mellow, B., Mackin, R.O., Joyce, M.J., Peyton, A.J. 2007 In: Proceedings of 5th World Congress on Industrial Process Tomography : Bergen, Norway, 3rd to 6th September, 2007.. Virtual Centre for Industrial Process Tomography ISBN: 9780853162650 0853162654.
Chapter

Digital advances in pulsed fast neutron analysis for applications in counter terrorism.
Aspinall, M., D′Mellow, B., Mackin, R.O., Joyce, M.J., Peyton, A. 2007
Conference paper

Counter terrorism using commercial hardware - the 55,000,000 km/hour speed trap.
Aspinall, M., Joyce, M.J. 2006 In: Proceedings of the SET for Britain House of Commons science exhibition..
Chapter