Alan Phelps, DPhil, MA, CPhys, FInstP, MIEEE, FRSE

Prof

  • United Kingdom

1996 …2023
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Research Output 1996 2019

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Article
2019

Compact high power millimetre wave sources driven by pseudospark-sourced electron beams

He, W., Xie, J., Phelps, A., Cross, A., Yin, H., Shu, G., Yin, Y., Ronald, K., Zhao, J., Chen, X., Alfadhl, Y. & Zhang, L., 11 Sep 2019, In : IET Microwaves, Antennas & Propagation. 13, 11, p. 1794-1798 5 p.

Research output: Contribution to journalArticle

Open Access
File
pencil beams
Millimeter waves
millimeter waves
Electron beams
electron beams

Coupling structure for a high Q corrugated cavity as a microwave undulator

Zhang, L., He, W., Donaldson, C. R., Clarke, J., Ronald, K., Phelps, A. D. R. & Cross, A. W., 4 Aug 2019, (Accepted/In press) In : IEEE Transactions on Electron Devices. 6 p.

Research output: Contribution to journalArticle

Open Access
File
Wigglers
Waveguides
Microwaves
Permanent magnets
Geometry
Open Access
File
Millimeter waves
millimeter waves
gradients
Linear accelerators
test facilities

Maser radiation from collisionless shocks: application to astrophysical jets

Speirs, D. C., Ronald, K., Phelps, A. D. R., Koepke, M. E., Cairns, R. A., Rigby, A., Cruz, F., Trines, R., Bamford, R., Kellett, B. J., Albertazzi, B., Cross, J. E., Fraschetti, F., Graham, P., Kozlowski, P. M., Kuramitsu, Y., Miniati, F., Morita, T., Oliver, M., Reville, B. & 10 othersSakawa, Y., Sarkar, S., Spindloe, C., Koenig, M., Silva, L. O., Lamb, D. Q., Tzeferacos, P., Lebedev, S., Gregori, G. & Bingham, R., 14 Mar 2019, In : High Power Laser Science and Engineering. 7, 8 p., e17.

Research output: Contribution to journalArticle

Open Access
File
Masers
masers
astrophysics
shock
Radiation
Open Access
File
coupled modes
copper
tunable filters
backups
periodic variations
1 Citation (Scopus)

Resonant excitation of volume and surface fields on complex electrodynamic surfaces

MacLachlan, A. J., Robertson, C. W., Konoplev, I. V., Cross, A. W., Phelps, A. D. R. & Ronald, K., 14 Mar 2019, In : Physical Review Applied. 11, 3, 8 p., 034034.

Research output: Contribution to journalArticle

Open Access
File
Electrodynamics
electrodynamics
Excitation
excitation
Substrate

Study of a 0.35 THz extended interaction oscillator driven by a pseudospark-sourced sheet electron beam

Xie, J., Zhang, L., Yin, H., He, W., Ronald, K., Phelps, A. D. R., Chen, X., Zhang, J., Alfadhl, Y., Yuan, X., Meng, L. & Cross, A. W., 28 Nov 2019, (Accepted/In press) In : IEEE Transactions on Electron Devices. p. 1-7 7 p.

Research output: Contribution to journalArticle

Open Access
File
Beam plasma interactions
Electron beams
Microfabrication
Surface roughness
Networks (circuits)

Systematic study of a corrugated waveguide as a microwave undulator

Zhang, L., He, W., Clarke, J., Ronald, K., Phelps, A. D. R. & Cross, A., 31 Jan 2019, In : Journal of Synchrotron Radiation. 26, 1, p. 11-17 7 p.

Research output: Contribution to journalArticle

Open Access
File
corrugated waveguides
free electron lasers
microwaves
cavities
wavelengths
2018
1 Citation (Scopus)

Design of a Ka-band MW-level high efficiency gyroklystron for accelerators

Wang, L., Dong, K., He, W., Wang, J., Luo, Y., Cross, A. W., Ronald, K. & Phelps, A. D. R., 12 Sep 2018, In : IET Microwaves, Antennas and Propagation. 12, 11, p. 1752-1757 6 p.

Research output: Contribution to journalArticle

Open Access
File
Particle accelerators
MATLAB
Networks (circuits)
1 Citation (Scopus)

Microwave undulator using a helically corrugated waveguide

Zhang, L., He, W., Clarke, J., Ronald, K., Phelps, A. D. R. & Cross, A. W., 31 Dec 2018, In : IEEE Transactions on Electron Devices. 65, 12, p. 5499-5504 6 p.

Research output: Contribution to journalArticle

Open Access
File
Wigglers
Waveguides
Microwaves
Free electron lasers
Electromagnetic fields
2 Citations (Scopus)
Open Access
File
radiation sources
coupled modes
cavities
mesh
configurations
2017
18 Citations (Scopus)

Advanced post-acceleration methodology for pseudospark-sourced electron beam

Zhao, J., Yin, H., Zhang, L., Shu, G., He, W., Zhang, Q., Phelps, A. D. R. & Cross, A. W., 6 Feb 2017, In : Physics of Plasmas. 24, 2, 5 p., 023105.

Research output: Contribution to journalArticle

Open Access
File
electron beams
methodology
electric potential
electron sources
pulses
8 Citations (Scopus)

A tapered multi-gap multi-aperture pseudospark-sourced electron gun based X-band slow wave oscillator

Kumar, N., Lamba, R. P., Hossain, A. M., Pal, U. N., Phelps, A. D. R. & Prakash, R., 20 Nov 2017, In : Applied Physics Letters. 111, 21, 4 p., 213502.

Research output: Contribution to journalArticle

Open Access
File
electron guns
superhigh frequencies
apertures
oscillators
hollow cathodes
8 Citations (Scopus)
Open Access
File
Periodic structures
3D printers
printing
Printing
Electron beams
11 Citations (Scopus)

Experiments on W-band extended interaction oscillator with pseudospark sourced post-accelerated electron beam

Zhao, J., Yin, H., Zhang, L., He, W., Zhang, Q., Phelps, A. D. R. & Cross, A. W., 8 Jun 2017, In : Physics of Plasmas. 24, 4 p., 060703.

Research output: Contribution to journalArticle

Open Access
File
oscillators
electron beams
output
interactions
radiation sources
1 Citation (Scopus)

Laboratory experiments simulating electron cyclotron masers in space

Ronald, K., Speirs, D. C., King, M., Heelis, T., McConville, S. L., Gillespie, K. M., Bingham, R., Robertson, C. W., Cross, A. W. & Phelps, A. D. R., 4 Aug 2017, In : EPJ Web of Conferences. 149, 2 p., 03015.

Research output: Contribution to journalArticle

Open Access
File
masers
cyclotrons
electrons
1 Citation (Scopus)

Progress in microwave to sub-THz sources at Strathclyde

Phelps, A. D. R., 4 Aug 2017, In : EPJ Web of Conferences. 149, 2 p., 04023.

Research output: Contribution to journalArticle

Open Access
File

Pseudospark excited sub-THz frequency sources

Yin, H., Zhang, L., Yin, Y., Zhao, J., Shu, G., He, W., Cross, A. W. & Phelps, A. D. R., 4 Aug 2017, In : EPJ Web of Conferences. 149, 2 p., 05015.

Research output: Contribution to journalArticle

Open Access
File

Study of the beam profile and position instability of a post-accelerated pseudospark-sourced electron beam

Zhao, J., Yin, H., Zhang, L., Shu, G., He, W., Phelps, A. D. R., Cross, A. W., Pang, L. & Zhang, Q., 3 Mar 2017, (Accepted/In press) In : Physics of Plasmas. 24, 3, 5 p., 033118.

Research output: Contribution to journalArticle

Open Access
File
Electron beams
electron beams
profiles
Cathodes
hollow cathodes
2016
11 Citations (Scopus)

Coherent summation of emission from relativistic Cherenkov sources as a way of production of extremely high-intensity microwave pulses

Ginzburg, N. S., Cross, A. W., Golovanov, A. A., Phelps, A. D. R., Romanchenko, I. V., Rostov, V. V., Sharypov, K. A., Shpak, V. G., Shunailov, S. A., Ul'masculov, M. R., Yalandin, M. I. & Zotova, I. V., 29 Jan 2016, In : IEEE Transactions on Plasma Science. 44, 4, p. 377-385 9 p.

Research output: Contribution to journalArticle

Open Access
File
microwaves
pulses
radiant flux density
modulators
oscillations
23 Citations (Scopus)

Influence of the electrode gap separation on the pseudospark-sourced electron beam generation

Zhao, J., Yin, H., Zhang, L., Shu, G., He, W., Zhang, J., Zhang, Q., Phelps, A. D. R. & Cross, A. W., 25 Jul 2016, In : Physics of Plasmas. 23, 7, 6 p., 073116.

Research output: Contribution to journalArticle

Open Access
File
electron beams
electrodes
beam currents
electric potential
time lag
3 Citations (Scopus)

Microwave coupler for W-band micro re-entrant square cavities

Paoloni, C., Mineo, M., Yin, H., Zhang, L., He, W., Robertson, C. W., Ronald, K., Phelps, A. D. R. & Cross, A. W., 15 May 2016, In : IET Microwaves, Antennas & Propagation. 10, 7, p. 764-769 6 p.

Research output: Contribution to journalArticle

Open Access
File
Klystrons
Microwaves
Millimeter waves
Microfabrication
Amplification
20 Citations (Scopus)

Study of a 0.2 THz extended interaction oscillator driven by a pseudospark-sourced sheet electron beam

Shu, G., He, W., Zhang, L., Yin, H., Zhao, J., Cross, A. W. & Phelps, A. D. R., 31 Dec 2016, In : IEEE Transactions on Electron Devices. 63, 12, p. 4955-4960 6 p.

Research output: Contribution to journalArticle

Open Access
File
Beam plasma interactions
Electron beams
Current density
Magnetic fields
Radiation
2015
10 Citations (Scopus)

Design and measurement of a W-band Brewster window

Zhang, Y., Zhang, L., He, W., Donaldson, C. R., McElhinney, P., Phelps, A. D. R. & Cross, A. W., 1 Dec 2015, In : IEEE Microwave and Wireless Components Letters. 25, 12, p. 826-828 3 p.

Research output: Contribution to journalArticle

Open Access
File
corrugated waveguides
Waveguides
Electric network analyzers
traveling wave amplifiers
analyzers
15 Citations (Scopus)

Experimental study of microwave pulse compression using a five-fold helically corrugated waveguide

Zhang, L., Mishakin, S. V., He, W., Samsonov, S. V., McStravick, M., Denisov, G. G., Cross, A. W., Bratman, V. L., Whyte, C. G., Robertson, C. W., Young, A. R., Ronald, K. & Phelps, A. D. R., 30 Jan 2015, In : IEEE Transactions on Microwave Theory and Techniques . 63, 3, p. 1090-1096 7 p., 7027876.

Research output: Contribution to journalArticle

Open Access
File
corrugated waveguides
Pulse compression
pulse compression
Waveguides
Microwaves
45 Citations (Scopus)

Generation of broadband terahertz radiation using a backward wave oscillator and pseudospark-sourced electron beam

He, W., Zhang, L., Bowes, D., Yin, H., Ronald, K., Phelps, A. D. R. & Cross, A. W., 28 Sep 2015, In : Applied Physics Letters. 107, 13, 4 p., 133501.

Research output: Contribution to journalArticle

Open Access
File
backward waves
oscillators
wave interaction
electron beams
broadband
49 Citations (Scopus)

Generation of electromagnetic fields of extremely high intensity by coherent summation of Cherenkov superradiance pulses

Ginzburg, N. S., Cross, A. W., Golovanov, A. A., Mesyats, G. A., Pedos, M. S., Phelps, A. D. R., Romanchenko, I. V., Rostov, V. V., Rukin, S. N., Sharypov, K. A., Shpak, V. G., Shunailov, S. A., Ulmaskulov, M. R., Yalandin, M. I. & Zotova, I. V., 11 Sep 2015, In : Physical Review Letters. 115, 11, 12 p., 114802.

Research output: Contribution to journalArticle

Open Access
File
electromagnetic fields
pulses
radiation
spontaneous emission
division
2014

3D PiC code investigations of auroral kilometric radiation mechanisms

Gillespie, K. M., McConville, S. L., Speirs, D. C., Ronald, K., Phelps, A. D. R., Bingham, R., Cross, A. W., Robertson, C. W., Whyte, C. G., He, W., Vorgul, I., Cairns, R. A. & Kellett, B. J., 1 Jan 2014, In : Journal of Physics: Conference Series . 511, 1, 6 p., 012051.

Research output: Contribution to journalArticle

Open Access
File
radiation
cyclotrons
simulation
radio emission
magnetic dipoles
14 Citations (Scopus)

Backward wave cyclotron-maser emission in the auroral magnetosphere

Speirs, D. C., Bingham, R., Cairns, R. A., Vorgul, I., Kellett, B. J., Phelps, A. D. R. & Ronald, K., 7 Oct 2014, In : Physical Review Letters. 113, 15, 5 p., 155002.

Research output: Contribution to journalArticle

Open Access
File
backward waves
masers
magnetospheres
cyclotrons
radiation

Investigation of a klystron with a pseudospark-sourced electron beam

Bowes, D., Yin, H., Cross, A. W., He, W., Phelps, A. D. R., Ronald, K., Chen, X. & Li, D., 2014, In : Journal of Physics: Conference Series . 511, 1, 4 p., 012020.

Research output: Contribution to journalArticle

Open Access
File
self focusing
plasma jets
high current
seeds
brightness

Numerical simulation of unconstrained cyclotron resonant maser emission

Speirs, D. C., Gillespie, K. M., Ronald, K., McConville, S. L., Phelps, A. D. R., Cross, A. W., Bingham, R., Kellett, B. J., Cairns, R. A. & Vorgul, I., 1 Jan 2014, In : Journal of Physics: Conference Series . 511, 1, 5 p., 012052.

Research output: Contribution to journalArticle

Open Access
File
masers
cyclotrons
output
radiation
simulation
2 Citations (Scopus)

Progress towards numerical and experimental simulations of fusion relevant beam instabilities

King, M., Bryson, R., Ronald, K., Cairns, R. A., McConville, S. L., Speirs, D. C., Phelps, A. D. R., Bingham, R., Gillespie, K. M., Cross, A. W., Vorgul, I. & Trines, R., 2014, In : Journal of Physics: Conference Series . 511, 1, p. 1-5 5 p., 012047.

Research output: Contribution to journalArticle

Open Access
File
fusion
simulation
astrophysics
inertial confinement fusion
masers

Scaled experiment to investigate auroral kilometric radiation mechanisms in the presence of background electrons

McConville, S. L., Ronald, K., Speirs, D. C., Gillespie, K. M., Phelps, A. D. R., Cross, A. W., Bingham, R., Robertson, C. W., Whyte, C. G., He, W., King, M., Bryson, R., Vorgul, I., Cairns, R. A. & Kellett, B. J., 1 Jan 2014, In : Journal of Physics: Conference Series . 511, 1, 6 p., 012061.

Research output: Contribution to journalArticle

Open Access
File
magnetic compression
radiation
electrons
distribution functions
waveguides
11 Citations (Scopus)

Visualization of a pseudospark-sourced electron beam

Bowes, D., Yin, H., He, W., Ronald, K., Phelps, A., Chen, D., Zhang, P., Chen, X., Li, D. & Cross, A. W., 21 Oct 2014, In : IEEE Transactions on Plasma Science. 42, 10, p. 2826-2827 2 p.

Research output: Contribution to journalArticle

Open Access
File
Electron beams
Visualization
electron beams
Phosphors
X rays
12 Citations (Scopus)

X-ray emission as a diagnostic from pseudospark-sourced electron beams

Bowes, D., Yin, H., He, W., Zhang, L., Cross, A. W., Ronald, K., Phelps, A. D. R., Chen, D., Zhang, P., Chen, X. & Li, D., 15 Sep 2014, In : Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms . 335, p. 74-77 4 p.

Research output: Contribution to journalArticle

Open Access
File
Electron beams
electron beams
X rays
x rays
Photodetectors
2013
16 Citations (Scopus)

Generation, amplification, and nonlinear self-compression of powerful superradiance pulses

Ginzburg, N. S., Zotova, I. V., Cross, A. W., Phelps, A. D. R., Yalandin, M. I. & Rostov, V. V., Apr 2013, In : IEEE Transactions on Plasma Science. 41, 4, p. 646-660 15 p.

Research output: Contribution to journalArticle

Open Access
File
electromagnetic pulses
pulse generators
promotion
pulses
stimulated emission
28 Citations (Scopus)

Laboratory astrophysics: investigation of planetary and astrophysical maser emission

Bingham, R., Speirs, D. C., Kellett, B. J., Vorgul, I., McConville, S. L., Cairns, R. A., Cross, A. W., Phelps, A. D. R. & Ronald, K., Oct 2013, In : Space Science Reviews. 178, 2-4, p. 695-713 19 p.

Research output: Contribution to journalArticle

laboratory astrophysics
astrophysics
masers
cyclotron frequency
plasma
2 Citations (Scopus)

Numerical simulations of unbounded cyclotron-maser emissions

Speirs, D. C., McConville, S. L., Gillespie, K. M., Phelps, A. D. R. & Ronald, K., Dec 2013, In : Journal of Plasma Physics. 79, 6, p. 999-1001 3 p.

Research output: Contribution to journalArticle

Open Access
File
masers
radio emission
cyclotrons
simulation
astrophysics
15 Citations (Scopus)

Surface field excitation by an obliquely incident wave

Konoplev, I. V., Phipps, A. R., Phelps, A. D. R., Robertson, C., Ronald, K. & Cross, A. W., Apr 2013, In : Applied Physics Letters. 102, 14, 4 p., 141106.

Research output: Contribution to journalArticle

Open Access
File
excitation
amplifiers
2012
22 Citations (Scopus)

Cylindrical, periodic surface lattice — theory, dispersion analysis, and experiment

Konoplev, I. V., MacLachlan, A. J., Robertson, C. W., Cross, A. W. & Phelps, A. D. R., Sep 2012, In : Applied Physics Letters. 101, 12, 5 p., 121111.

Research output: Contribution to journalArticle

Open Access
File
electromagnetic properties
wave equations
topology
impedance
coatings
78 Citations (Scopus)
File
corrugated waveguides
coupled modes
Waveguides
Microwaves
microwaves
6 Citations (Scopus)

Numerical simulations of a co-harmonic gyrotron

Constable, D. A., Ronald, K., He, W., Phelps, A. D. R., Cross, A. W., Savilov, A. V., Bratman, V. L. & Bandurkin, I. V., 15 Feb 2012, In : Journal of Physics D: Applied Physics. 45, 6, 8 p., 065105.

Research output: Contribution to journalArticle

Cyclotrons
Harmonic generation
Waveguides
Cells
harmonics
2011
14 Citations (Scopus)

Auroral magnetospheric cyclotron emission processes: numerical and experimental simulations

Ronald, K., Speirs, D. C., McConville, S. L., Gillespie, K., Phelps, A. D. R., Bingham, R., Vorgul, I., Cairns, R. A., Cross, A. W., Robertson, C., Whyte, C. G., He, W. & Kellett, B. J., Jul 2011, In : Plasma Physics and Controlled Fusion. 53, 7, 11 p., 074015.

Research output: Contribution to journalArticle

Cyclotrons
Magnetosphere
cyclotrons
magnetospheres
Radiation
15 Citations (Scopus)

Cyclotron maser emission: stars, planets, and laboratory

Vorgul, I., Kellett, B. J., Cairns, R. A., Bingham, R., Ronald, K., Speirs, D. C., McConville, S. L., Gillespie, K. M. & Phelps, A. D. R., May 2011, In : Physics of Plasmas. 18, 5, p. - 7 p., 056501.

Research output: Contribution to journalArticle

masers
cyclotrons
planets
stars
cyclotron frequency
12 Citations (Scopus)

Cyclotron maser radiation from inhomogeneous plasmas

Cairns, R. A., Vorgul, I., Bingham, R., Ronald, K., Speirs, D. C., McConville, S. L., Gillespie, K. M., Bryson, R., Phelps, A. D. R., Kellett, B. J., Cross, A. W., Robertson, C., Whyte, C. G. & He, W., Feb 2011, In : Physics of Plasmas. 18, 2, p. 022902 5 p.

Research output: Contribution to journalArticle

masers
cyclotrons
radiation
plasma diffusion
space plasmas
45 Citations (Scopus)
Open Access
File
coherent radiation
cavities
waveguides
Q factors
cut-off
4 Citations (Scopus)
relativistic electron beams
electromagnetic fields
excitation
photonics
optics

W-band gyro-BWO with a four-stage depressed collector

Zhang, L., He, W., Donaldson, C. R., Cross, A. W., Phelps, A. D. R., McElhinney, P. & Ronald, K., Sep 2011, In : Terahertz Science & Technology. 4, 3, p. 76-84 9 p.

Research output: Contribution to journalArticle

Open Access
File
backward waves
accumulators
recovery
oscillators
secondary emission
Open Access
File
corrugated waveguides
cusps
electron beams
backward waves
wave interaction
2010
107 Citations (Scopus)

A cusp electron gun for millimeter wave gyrodevices

Donaldson, C. R., He, W., Cross, A. W., Li, F., Phelps, A. D. R., Zhang, L., Ronald, K., Robertson, C., Whyte, C. & Young, A., 5 Apr 2010, In : Applied Physics Letters. 96, 14, 3 p., 141501.

Research output: Contribution to journalArticle

Open Access
File
electron guns
cusps
millimeter waves
thermionics
submillimeter waves