2023

Chapman, Sandra C. (2023) Charting the solar cycle. Frontiers in Astronomy and Space Sciences . doi:10.3389/fspas.2022.1037096 (In Press)

2022

Reman, Bernard C. G., Dendy, Richard O., Igami, Hiroe, Akiyama, Tsuyoshi, Salewski, Mirko, Chapman, Sandra C., Cook, James W. S., Inagaki, Shigeru, Saito, Kenji, Seki, Ryosuke, Toida, Mieko, Kim, Minho, Thatipamula, Shekar G. and Yun, Gunsu S. (2022) First observation and interpretation of spontaneous collective radiation from fusion-born ions in a stellarator plasma. Plasma Physics and Controlled Fusion, 64 (8). 085008. doi:10.1088/1361-6587/ac7892

Bergin, Aisling, Chapman, Sandra C., Moloney, N. R. and Watkins, Nicholas W. (2022) Variation of geomagnetic index empirical distribution and burst statistics across successive solar cycles. Journal of Geophysical Research: Space Physics, 127 (1). e2021JA029986. doi:10.1029/2021ja029986

2021

Leamon, Robert J., McIntosh, Scott W., Chapman, Sandra C. and Watkins, Nicholas W. (2021) Response to “Limitations in the Hilbert transform approach to locating solar cycle terminators” by R. Booth. Solar Physics, 296 (10). 151. doi:10.1007/s11207-021-01897-z

Chapman, Sandra C., McIntosh, S. W., Leamon, R. J. and Watkins, Nicholas W. (2021) The Sun’s magnetic (Hale) cycle and 27 day recurrences in the aa geomagnetic index. Astrophysical Journal, 917 (2). 54. doi:10.3847/1538-4357/ac069e

Reman, B. C. G., Dendy, R. O., Akiyama, T. , Chapman, Sandra C., Cook, James William S., Igami, H., Inagaki, S., Saito, K., Seki, R., Kim, M.H., Thatipamula, S.G. and Yun, G.S. (2021) Density dependence of ion cyclotron emission from deuterium plasmas in the large helical device. Nuclear Fusion, 61 (6). 066023. doi:10.1088/1741-4326/abf661

Orr, L., Chapman, Sandra C., Gjerloev, J. W. and Guo, W. (2021) Network community structure of substorms using SuperMAG magnetometers. Nature Communications, 12 (1). 1842. doi:10.1038/s41467-021-22112-4

Calel, Raphael, Chapman, Sandra C., Stainforth, David A. and Watkins, Nicholas W. (2021) Data for Temperature variability implies greater economic damages from climate change. [Dataset]

2020

Calel, Raphael, Chapman, Sandra C., Stainforth, David A. and Watkins, Nicholas W. (2020) Temperature variability implies greater economic damages from climate change. Nature Communications, 11 (1). 5028. doi:10.1038/s41467-020-18797-8

Chapman, Sandra C., Murphy, E. J., Stainforth, David A. and Watkins, Nicholas W. (2020) Trends in winter warm spells in the central England temperature record. Journal of Applied Meteorology and Climatology, 59 (6). doi:10.1175/JAMC-D-19-0267.1

Bergin, Aisling, Chapman, Sandra C. and Gjerloev, J. W. (2020) AE, D ST and their SuperMAG Counterparts : the effect of improved spatial resolution in geomagnetic indices. Journal of Geophysical Research: Space Physics, 125 (5). e2020JA027828. doi:10.1029/2020ja027828

Leamon, Robert J., McIntosh, Scott W., Chapman, Sandra C. and Watkins, Nicholas W. (2020) Timing terminators : forecasting sunspot cycle 25 onset. Solar Physics, 295 (2). doi:10.1007/s11207-020-1595-3

Chapman, Sandra C., Horne, R. B. and Watkins, Nicholas W. (2020) Using the aa index over the last 14 solar cycles to characterize extreme geomagnetic activity. Geophysical Research Letters, 47 (3). e2019GL08652. doi:10.1029/2019GL086524

Chapman, Sandra C., McIntosh, S. W., Leamon, R. J. and Watkins, Nicholas W. (2020) Quantifying the solar cycle modulation of extreme space weather. Geophysical Research Letters, 47 (11). doi:10.1029/2020GL087795

2019

Chapman, Benjamin, Dendy, R. O., Chapman, Sandra C., McClements, K. G., Yun, G. S., Thatipamula, S. G. and Kim, M. H. (2019) Interpretation of suprathermal emission at deuteron cyclotron harmonics from deuterium plasmas heated by neutral beam injection in the KSTAR tokamak. Nuclear Fusion, 59 (10). 106021. doi:10.1088/1741-4326/ab35a7

Reman, Bernard Charles G, Dendy, Richard, Akiyama, T., Chapman, Sandra C., Cook, J. W. S., Igami, H., Inagaki, S., Saito, K. and Yun, G. S. (2019) Interpretating observations of ion cyclotron emission from Large Helical Device plasmas with beam-injected ion populations. Nuclear Fusion, 59 (9). 096013. doi:10.1088/1741-4326/ab2ca2

Orr, Lois, Chapman, Sandra C. and Gjerloev, J. W. (2019) Directed network of substorms using SuperMAG ground‐based magnetometer data. Geophysical Research Letters . doi:10.1029/2019gl082824

Chapman, Sandra C., Watkins, N. W. and Stainforth, D. A. (2019) Warming Trends in Summer Heatwaves. Geophysical Research Letters, 46 (3). pp. 1634-1640. doi:10.1029/2018GL081004

Ochoukov, R., Bilato, R., Bobkov, V., Chapman, B., Chapman, S.C., Dendy, R.O., Dunne, M., Faugel, H., García-Muñoz, M., Geiger, B., Kallenbach, A., Kappatou, A., McClements, K.G., Moseev, D., Nielsen, S., Rasmussen, J., Schneider, P., Weiland, M. and Noterdaeme, J.-M. (2019) Core plasma ion cyclotron emission driven by fusion-born ions. Nuclear Fusion, 59 (1). 014001. doi:10.1088/1741-4326/aaebb0

Chapman, Sandra C., Watkins, Nicholas W. and Stainforth, David A. (2019) Warming trends in summer heatwaves. Geophysical Research Letters, 46 . doi:10.1029/2018GL081004

2018

Chapman, Sandra C., Lang, Peter Thomas, Dendy, R. O., Watkins, Nicholas W., Dunne, Mike G and Giannone, Louis (2018) Intrinsic ELMing in ASDEX Upgrade and global control system-plasma self-entrainment. Nuclear Fusion, 58 (12). 126003. doi:10.1088/1741-4326/aadd1c

Tindale, Elizabeth, Chapman, Sandra C., Moloney, N. R. and Watkins, Nicholas W. (2018) The dependence of solar wind burst size on burst duration and its invariance across solar cycles 23 and 24. Journal of Geophysical Research: Space Physics, 123 (9). pp. 7196-7210. doi:10.1029/2018JA025740

Chapman, Sandra C., Watkins, Nicholas W. and Tindale, Elizabeth (2018) Reproducible aspects of the climate of space weather over the last five solar cycles. Space Weather, 16 (8). pp. 1128-1142. doi:10.1029/2018SW001884

Chapman, Benjamin, Dendy, R. O., Chapman, Sandra C., McClements, K. G., Yun, G., Thatipamula, S. G. and Kim, M. H. (2018) Nonlinear wave interactions generate high-harmonic cyclotron emission from fusion-born protons during a KSTAR ELM crash. Nuclear Fusion, 58 (9). 096027. doi:10.1088/1741-4326/aacf47

McClements, K. G., Brisset, A., Chapman, Benjamin, Chapman, Sandra C., Dendy, R. O., Jacquet, P., Kiptily, V. G., Mantsinen, M. and Reman, B. C. G. (2018) Observations and modelling of ion cyclotron emission observed in JET plasmas using a sub-harmonic arc detection system during ion cyclotron resonance heating. Nuclear Fusion, 58 (9). 096020. doi:10.1088/1741-4326/aace03

Chapman, Sandra C., Lang, P. T., Dendy, R. O., Giannone, L., Watkins, Nicholas W. and ASDEX Upgrade Team, (2018) Control system-plasma synchronization and naturally occurring edge localized modes in a tokamak. Physics of Plasmas, 25 (6). 062511. doi:10.1063/1.5025333

2017

McClements, K. G., Allen, J. O., Chapman, Sandra C., Dendy, R. O., Irvine, S. W. A., Marshall, O., Robb, D., Turnyankiy, M. and Vann, R. G. L. (2017) Particle acceleration during merging-compression plasma start-up in the Mega Amp Spherical Tokamak. Plasma Physics and Controlled Fusion, 60 (2). 025013. doi:10.1088/1361-6587/aa98fa

Chapman, Benjamin, Dendy, R. O., McClements, Kenneth G., Chapman, Sandra C., Yun, Gunsu S, Thatipamula, Shekar Goud and Kim, Minho (2017) Sub-microsecond temporal evolution of edge density during edge localized modes in KSTAR tokamak plasmas inferred from ion cyclotron emission. Nuclear Fusion, 57 (12). 124004. doi:10.1088/1741-4326/aa8e09

Tindale, Elizabeth and Chapman, Sandra C. (2017) Solar wind plasma parameter variability across solar cycles 23 and 24 : from turbulence to extremes. Journal of Geophysical Research : Space Physics . doi:10.1002/2017ja024412

Chapman, Sandra C. (2017) Overview of progress in European medium sized tokamaks towards an integrated plasma-edge/wall solution. Nuclear Fusion . doi:10.1088/1741-4326/aa6084

Pratt, J., Busse, A., Müller, W-C., Watkins, Nicholas W. and Chapman, Sandra C. (2017) Extreme-value statistics from Lagrangian convex hull analysis for homogeneous turbulent Boussinesq convection and MHD convection. New Journal of Physics, 19 (6). 065006. doi:10.1088/1367-2630/aa6fe8

Cook, James William S., Dendy, R. O. and Chapman, Sandra C. (2017) Stimulated emission of fast Alfvén waves within magnetically confined fusion plasmas. Physical Review Letters, 118 . 185001. doi:10.1103/PhysRevLett.118.185001

Carbajal, L., Dendy, R. O., Chapman, Sandra C. and Cook, James William S. (2017) Quantifying fusion born ion populations in magnetically confined plasmas using ion cyclotron emission. Physical Review Letters, 118 (10). 105001. doi:10.1103/PhysRevLett.118.105001

Dods, Joe, Chapman, Sandra C. and Gjerloev, J. W. (2017) Characterising the ionospheric current pattern response to southward and northward IMF turnings with dynamical SuperMAG correlation networks. Journal of Geophysical Research: Space Physics, 122 (2). pp. 1883-1902. doi:10.1002/2016JA023686

Chapman, Sandra C., Dendy, R. O., Lang, P. T., Watkins, Nicholas W., Calderon, F. A., Romanelli, M. and Todd, T. N. (2017) The global build-up to intrinsic ELM bursts and comparison with pellet triggered ELMs seen in JET. Nuclear Fusion, 57 (2). 022017. doi:10.1088/0029-5515/57/2/022017

2016

Tindale, Elizabeth and Chapman, Sandra C. (2016) Solar cycle variation of the statistical distribution of the solar wind ε parameter and its constituent variables. Geophysical Research Letters, 43 (11). pp. 5563-5570. doi:10.1002/2016GL068920

Watkins, Nicholas W., Pruessner, Gunnar, Chapman, Sandra C., Crosby, Norma B. and Jensen, Henrik Jeldtoft (2016) 25 Years of self-organized criticality : concepts and controversies. Space Science Reviews, 198 (1-4). pp. 3-44. doi:10.1007/s11214-015-0155-x

2015

Osman, K. T., Kiyani, K., Matthaeus, W. H., Hnat, Bogdan, Chapman, Sandra C. and Khotyaintsev, Yu. V. (2015) Multi-spacecraft measurement of turbulence within a magnetic reconnection jet. The Astrophysical Journal, 815 (2). L24. doi:10.1088/2041-8205/815/2/L24

Hush, Philip, Chapman, Sandra C., Dunlop, M. W. and Watkins, Nicholas W. (2015) Robust statistical properties of the size of large burst events in AE. Geophysical Research Letters, 42 (21). pp. 9197-9202. doi:10.1002/2015GL066277

Lai, W. N., Chapman, Sandra C. and Dendy, R. O. (2015) Velocity space evolution of a minority energetic electron population undergoing the anomalous Doppler instability. Physics of Plasmas, 22 (11). 112119. doi:10.1063/1.4936101

Dods, Joe, Chapman, Sandra C. and Gjerloev, Jesper W. (2015) Network analysis of geomagnetic substorms using the SuperMAG database of ground based magnetometer stations. Journal of Geophysical Research, 120 . pp. 7774-7784. doi:10.1002/2015JA021456

Chapman, Sandra C., Stainforth, David A. and Watkins, Nicholas W. (2015) Limits to the quantification of local climate change. Environmental Research Letters, 10 (9). 094018. doi:10.1088/1748-9326/10/9/094018

Chapman, Sandra C., Dendy, R. O., Todd, T. N., Watkins, Nicholas W., Calderon, F. A. and Morris, J. (2015) The global build-up to intrinsic edge localized mode bursts seen in divertor full flux loops in JET. Physics of plasmas, Volume 22 (Number 7). Article number 072506. doi:10.1063/1.4926592

Chapman, I. T., Chapman, Sandra C. and Dendy, R. O. (2015) Overview of MAST results. Nuclear Fusion, 55 (10). 104008. doi:10.1088/0029-5515/55/10/104008

Zhu, Hao, Dendy, R. O., Chapman, Sandra C. and Inagaki, S. (2015) A quantitative model for heat pulse propagation across Large Helical Device plasmas. Physics of plasmas, 22 (6). 062308 . doi:10.1063/1.4923307

Kiyani, K., Osman, K. T. and Chapman, Sandra C. (2015) Dissipation and heating in solar wind turbulence : from the macro to the micro and back again. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Volume 373 (Number 2041). Article number 20140155. doi:10.1098/rsta.2014.0155

Freethy, S., McClements, K. G., Chapman, Sandra C., Dendy, R. O., Lai, W. N., Pamela, S. J. P., Shevchenko, V. F. (Vladimir F.) and Vann, R. G. L. (2015) Electron kinetics inferred from observations of microwave bursts during edge localized modes in the mega-amp spherical tokamak. Physical Review Letters, Volume 114 (Number 12). Article number 125004. doi:10.1103/PhysRevLett.114.125004

McClements, K. G., D'Inca, R., Dendy, R. O., Carbajal, L., Chapman, Sandra C., Cook, James William S., Harvey, R. W., Heidbrink, W. (William) and Pinches, Simon David (2015) Fast particle-driven ion cyclotron emission (ICE) in tokamak plasmas and the case for an ICE diagnostic in ITER. Nuclear Fusion, Volume 55 (Number 4). pp. 1-6. Article number 043013. doi:10.1088/0029-5515/55/4/043013

Chapman, Sandra C., Dendy, R. O., Watkins, Nicholas W., Todd, T. N. and Calderon, F. A. (2015) ELM occurrence times in relation to the phase evolution of global measurements in JET. In: 42nd European Physical Society Conference on Plasma Physics, Lisbon, Portugal, 22-26 Jun 2015. Published in: Proceedings 42nd EPS Conference on Plasma Physics, 39E ISBN 2914771983.

2014

Stainforth, David A., Chapman, Sandra C. and Watkins, Nicholas W. (2014) Mapping climate change in European temperature distributions. Environmental Research Letters, Volume 8 (Number 3). Article number 034031. doi:10.1088/1748-9326/8/3/034031

Rekaa, V. L., Chapman, Sandra C. and Dendy, R. O. (2014) Ion pre-acceleration in fully self-consistent particle-in-cell simulations of supercritical perpendicular reforming shocks in multiple ion species plasmas. The Astrophysical Journal, Volume 791 (Number 1). pp. 26-34. doi:10.1088/0004-637X/791/1/26

Matthaeus, W. H., Oughton, S., Osman, K. T., Servidio, S., Wan, M., Gary, S. P., Shay, M. A., Valentini, F., Roytershteyn, V., Karimabadi, H. and Chapman, Sandra C. (2014) Nonlinear and linear timescales near kinetic scales in solar wind turbulence. The Astrophysical Journal, Volume 790 (Number 2). Article number 155. doi:10.1088/0004-637X/790/2/155

Zhu, Hao, Chapman, Sandra C., Dendy, R. O. and Itoh, Kimitaka (2014) Transitions to improved confinement regimes induced by changes in heating in zero-dimensional models for tokamak plasmas. Physics of Plasmas, Volume 21 (Number 6). Article number 062307. doi:10.1063/1.4884126

Webster, A. J., Dendy, R. O., Calderon, F. A., Chapman, Sandra C., Delabie, E., Dodt, D., Felton, R., Todd, T. N., Maviglia, F., Morris, J., Riccardo, V., Alper, B., Brezinsek, S., Coad, P., Likonen, J. and Rubel, M. (2014) Time-resonant tokamak plasma edge instabilities? Plasma Physics and Controlled Fusion, Volume 56 (Number 7). 075017. doi:10.1088/0741-3335/56/7/075017

Chapman, Sandra C., Dendy, R. O., Todd, T. N., Watkins, Nicholas W., Webster, A. J., Calderon, F. A. and Morris, J. (2014) Relationship of edge localized mode burst times with divertor flux loop signal phase in JET. Physics of Plasmas, 21 (6). Article number 062302. doi:10.1063/1.4881474

Osman, K. T., Matthaeus, W. H., Gosling, J. T., Greco, A., Servidio, S., Hnat, Bogdan, Chapman, Sandra C. and Phan, T. D. (2014) Magnetic reconnection and intermittent turbulence in the solar wind. Physical Review Letters, Volume 112 . Article number 215002. doi:10.1103/PhysRevLett.112.215002

Osman, K. T., Kiyani, K., Chapman, Sandra C. and Hnat, B. (2014) Anisotropic intermittency of magnetohydrodynamic turbulence. The Astrophysical Journal Letters, Volume 783 (Number 2). Article number L27. doi:10.1088/2041-8205/783/2/L27

Servidio, S., Osman, K. T., Valentini, F., Perrone, D., Califano, F., Chapman, Sandra C., Matthaeus, W. H. and Veltri, P. (2014) Proton kinetic effects in vlasov and solar wind turbulence. The Astrophysical Journal Letters, Volume 781 (Number 2). Article Number L27. doi:10.1088/2041-8205/781/2/L27

Carbajal, L., Dendy, R. O., Chapman, Sandra C. and Cook, James William S. (2014) Linear and nonlinear physics of the magnetoacoustic cyclotron instability of fusion-born ions in relation to ion cyclotron emission. Physics of Plasmas, 21 (1). 012106. doi:10.1063/1.4861866

Gingell, Peter W., Chapman, Sandra C. and Dendy, R. O. (2014) Plasma blob formation by ion kinetic Kelvin–Helmholtz and interchange instabilities. Plasma Physics and Controlled Fusion, Volume 56 (Number 3). Article number 035012. doi:10.1088/0741-3335/56/3/035012

Chapman, Sandra C., Dendy, R. O., Webster, A. J., Watkins, Nicholas W., Todd, T. N. and Morris, J. (2014) An apparent relation between ELM occurrence times and the prior phase evolution of divertor flux loop measurements in JET. In: 41st EPS Conference on Plasma Physics, Berlin, Germany, 23-27 Jun 2014. Published in: Proceedings, 41st EPS Conference on Plasma Physics, Volume 38F ISBN 2914771908.

2013

Lai, W. N., Chapman, Sandra C. and Dendy, R. O. (2013) Self-consistent nonlinear kinetic simulations of the anomalous Doppler instability of suprathermal electrons in plasmas. Physics of Plasmas, Volume 20 (Number 10). Article number 102122 . doi:10.1063/1.4827207

Osman, K. T., Matthaeus, W. H., Kiyani, K., Hnat, B. and Chapman, Sandra C. (2013) Proton kinetic effects and turbulent energy cascade rate in the solar wind. Physical Review Letters, 111 (20). 201101 . doi:10.1103/PhysRevLett.111.201101

Dendy, R. O., Chapman, Sandra C. and Inagaki, S. (2013) Modelling the measured local time evolution of strongly nonlinear heat pulses in the Large Helical Device. Plasma Physics and Controlled Fusion, Volume 55 (Number 11). Article number 115009. doi:10.1088/0741-3335/55/11/115009

Chapman, Sandra C., Stainforth, David Alan and Watkins, Nicholas W. (2013) On estimating local long-term climate trends. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Volume 371 (Number 1991). Article number 20120287. doi:10.1098/rsta.2012.0287

Cook, James William S., Dendy, R. O. and Chapman, Sandra C. (2013) Particle-in-cell simulations of the magnetoacoustic cyclotron instability of fusion-born alpha-particles in tokamak plasmas. Plasma Physics and Controlled Fusion, 55 (6). 065003. doi:10.1088/0741-3335/55/6/065003

Wu, P., Perri, S., Osman, K. T., Wan, M., Matthaeus, W. H., Shay, M. A., Goldstein, M. L., Karimabadi, H. and Chapman, Sandra C. (2013) Intermittent heating in solar wind and kinetic simulations. Astrophysical Journal, Volume 763 (Number 2). L30. doi:10.1088/2041-8205/763/2/L30

Kiyani, K., Chapman, Sandra C., Sahraoui, F., Hnat, B., Fauvarque, O. and Khotyaintsev, Yu. V. (2013) Enhanced magnetic compressibility and isotropic scale invariance at sub-ion lamor scales in solar wind turbulence. Astrophysical Journal, 763 (1). 10. doi:10.1088/0004-637X/763/1/10

Karimabadi, H., Roytershteyn, V., Wan, M., Matthaeus, W. H., Daughton, W., Wu, P., Shay, M., Loring, B., Borovsky, J., Leonardis, Ersilia , Chapman, Sandra C. and Nakamura, T. K. M. (2013) Coherent structures, intermittent turbulence, and dissipation in high-temperature plasmas. Physics of Plasmas, Volume 20 (Number 1). Article number 012303. doi:10.1063/1.4773205

Leonardis, Ersilia , Chapman, Sandra C., Daughton, W., Roytershteyn, V. and Karimabadi, H. (2013) Identification of intermittent multifractal turbulence in fully kinetic simulations of magnetic reconnection. Physical Review Letters, Volume 110 (Number 20). Article number 205002 . doi:10.1103/PhysRevLett.110.205002

JET EFDA Contributors (Including: Calderon, F. A., Dendy, R. O., Chapman, Sandra C., Webster, A. J., Alper, B. and Nicol, R. M.). (2013) Identifying low-dimensional dynamics in type-I edge-localised-mode processes in JET plasmas. Physics of Plasmas, Volume 20 (Number 4). Article number 042306. doi:10.1063/1.4802793

Gingell, Peter W., Chapman, Sandra C. and Dendy, R. O. (2013) Plasma heating by ion gyro-scale blobs in the kinetic and fluid regimes. Plasma Physics and Controlled Fusion, Volume 55 (Number 5). Article number 055010. doi:10.1088/0741-3335/55/5/055010

Zhu, Hao, Chapman, Sandra C. and Dendy, R. O. (2013) Robustness of predator-prey models for confinement regime transitions in fusion plasmas. Physics of Plasmas, Volume 20 (Number 4). Article number 042302. doi:10.1063/1.4800009

2012

Kiyani, K., Chapman, Sandra C., Sahraoui, F., Hnat, B., Fauvarque, O. and Khotyaintsev, Yu. V. (2012) Enhanced magnetic compressibility and isotropic scale invariance at sub-ion larmor scales in solar wind turbulence. The Astrophysical Journal, Volume 763 (Number 1). doi:10.1088/0004-637X/763/1/10

Nicol, R. M., Chapman, Sandra C., Vertes, P. E., Nathan, P. J., Smith, M. L., Shtyrov, Y. and Bullmore, E. T. (2012) Fast reconfiguration of high-frequency brain networks in response to surprising changes in auditory input. Journal of Neurophysiology, Vol.107 (No.5). pp. 1421-1430. doi:10.1152/jn.00817.2011

Turner, A. J. (Andrew J.), Gogoberidze, Grigol and Chapman, Sandra C. (2012) Nonaxisymmetric anisotropy of solar wind turbulence as a direct test for models of magnetohydrodynamic turbulence. Physical Review Letters, Vol.108 (No.8). 085001. doi:10.1103/PhysRevLett.108.085001

Leonardis, E., Chapman, Sandra C. and Foullon, C. (Claire) (2012) Turbulent characteristics in the intensity fluctuations of a solar quiescent prominence observed by the Hinode Solar Optical Telescope. Astrophysical Journal, Vol.745 (No.2). p. 185. doi:10.1088/0004-637X/745/2/185

Watkins, Nicholas W., Hnat, B. and Chapman, Sandra C. (2012) On self-similar and multifractal models for the scaling of extreme bursty fluctuations in space plasmas. In: Sharma, A. and Bunde, A. and Dimri, V. P. and Baker, D. N., (eds.) Extreme Events and Natural Hazards : The Complexity Perspective. Geophysical Monograph Series, Volume 196 . American Geophysical Union, pp. 299-313. ISBN 9780875904863

Gogoberidze, Grigol, Chapman, Sandra C. and Hnat, B. (2012) Generation of residual energy in the turbulent solar wind. Physics of Plasmas, Vol.19 (No.10). Article no. 102310. doi:10.1063/1.4764469

Gogoberidze, Grigol, Chapman, Sandra C., Hnat, B. and Dunlop, M. W. (2012) Impact of measurement uncertainties on universal scaling of MHD turbulence. Monthly Notices of the Royal Astronomical Society, Vol. 426 (No. 2). pp. 951-955. doi:10.1111/j.1365-2966.2012.21775.x

Wan, M., Matthaeus, W. H., Karimabadi, H., Roytershteyn, V., Shay, M., Wu, P., Daughton, W., Loring, B. and Chapman, Sandra C. (2012) Intermittent dissipation at kinetic scales in collisionless plasma turbulence. Physical Review Letters, Volume 109 (Number 19). Article no. 195001. doi:10.1103/PhysRevLett.109.195001

Osman, K. T., Matthaeus, W. H., Hnat, B. and Chapman, Sandra C. (2012) Kinetic signatures and intermittent turbulence in the solar wind plasma. Physical Review Letters, Vol.108 (No.26). Article no. 261103. doi:10.1103/PhysRevLett.108.261103

Gingell, Peter W., Chapman, Sandra C., Dendy, R. O. and Brady, Christopher S. (2012) Transport and evolution of ion gyro-scale plasma blobs in perpendicular magnetic fields. Plasma Physics and Controlled Fusion, Volume 54 (Number 6). Article number 065005. doi:10.1088/0741-3335/54/6/065005

2011

Hnat, B., Chapman, Sandra C., Gogoberidze, G. and Wicks, R. T. (2011) Scale-free texture of the fast solar wind. Physical Review E, Volume 84 (Number 6). Article number 065401. doi:10.1103/PhysRevE.84.065401

Vértes, Petra E., Nicol, Ruth M., Chapman, Sandra C., Watkins, Nicholas W., Robertson, Duncan A. and Bullmore, Edward T. (2011) Topological isomorphisms of human brain and financial market networks. Frontiers in Systems Neuroscience, Volume 5 . doi:10.3389/fnsys.2011.00075

Turner, A. J. (Andrew J.), Gogoberidze, Grigol, Chapman, Sandra C., Hnat, B. and Müller, W.-C. (2011) Nonaxisymmetric anisotropy of solar wind turbulence. Physical Review Letters, Vol.107 (No.9). Article no. 095002 . doi:10.1103/PhysRevLett.107.095002

Cook, James William S., Dendy, R. O. and Chapman, Sandra C. (2011) Gyrobunching and wave–particle resonance in the lower hybrid drift instability. Plasma Physics and Controlled Fusion, Vol.53 (No.7). 074019. doi:10.1088/0741-3335/53/7/074019

Cook, James William S., Chapman, Sandra C., Dendy, R. O. and Brady, Christopher S. (2011) Self-consistent kinetic simulations of lower hybrid drift instability resulting in electron current driven by fusion products in tokamak plasmas. Plasma Physics and Controlled Fusion, Vol.53 (No.6). article no. 065006. doi:10.1088/0741-3335/53/6/065006

Dunlop, M. W., Bingham, R., Chapman, Sandra C., Escoubet, P., Zhang, Q.-H., Shen, C., Shi, J.-K., Trines, R., Wicks, Robert T., Pu, Z.-Y., De Keyser, J. (Johan), Schwartz, S. (Steve) and Liu, Z.-X. (2011) Use of multi-point analysis and modelling to address cross-scale coupling in space plasmas : lessons from cluster. Planetary and Space Science, Vol.59 (No.7). pp. 630-638. doi:10.1016/j.pss.2010.06.014

Gingell, Peter W., Chapman, Sandra C., Dendy, R. O. and Brady, Christopher S. (2011) Hybrid code investigation of the physics of multi-species plasma blobs in magnetic fields. In: 38th EPS Conference on Plasma Physics 2011, EPS 2011, Strasbourg, France, 27 June - 1 July 2011. Published in: 38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts, Volume 35 (Number 1). pp. 1-4. ISBN 978-161839593-1. ISSN 0378-2271.

2010

Hnat, B., Chapman, Sandra C., Kiyani, K. and Rowlands, G. (George) (2010) Self-similarity of magnetic energy density fluctuations in the solar wind: evidence for coronal signature? In: Turbulence and Multifractals in Geophysics and Space , Brussels, Belgium, 09-11 June 2010

Henwood, R., Chapman, Sandra C. and Willis, David M. (2010) Increasing lifetime of recurrent sunspot groups within the Greenwich photoheliographic results. Solar Physics, Vol.262 (No.2). pp. 299-313. doi:10.1007/s11207-009-9419-5

Cook, James William S., Chapman, Sandra C. and Dendy, R. O. (2010) Electron current drive by fusion-product-excited lower hybrid drift instability. Physical Review Letters, Vol.105 (No.25). article no. 255003 . doi:10.1103/PhysRevLett.105.255003

Chapman, Sandra C., Eliasson, Bengt and Shukla, P. K. (2010) Finite size effects and scaling in solar wind fluctuations. In: New Frontiers In Advanced Plasma Physics, Trieste, Italy, 5–16 Jul 2010. Published in: AIP Conference Proceedings, Vol.1306 pp. 35-49. ISSN 0094-243X. doi:10.1063/1.3533192

Kiyani, K., Chapman, Sandra C., Khotyaintsev, Y., Dunlop, M. and Sahraoui, F. (2010) Fractal dissipation of small-scale magnetic fluctuations in solar wind turbulence as seen by CLUSTER. In: 12th International Solar Wind Conference, St Milo, France, June 21-26, 2009. Published in: AIP Conference Proceedings, Vol.1216 pp. 136-139. ISBN 978-0-7354-0759-6. ISSN 0094-243X. doi:10.1063/1.3395819

Cook, James William S., Chapman, Sandra C. and Dendy, R. O. (2010) Growth rates of fusion product driven lower hybrid drift instability. In: 37th EPS Conference on Plasma Physics, Dublin, Ireland, 21-25 June 2010. Published in: Europhysics conference abstracts, Vol.34A P5.146.

Nicol, R. M., Chapman, Sandra C. and Dendy, R. O. (2010) The crossover to the "1/f" region of solar wind fluctuations. In: 12th International Solar Wind Conference, St Milo, France, June 21-26, 2009. Published in: AIP Conference Proceedings, Vol.1216 pp. 643-647. ISBN 978-0-7354-0759-6. ISSN 0094-243X. doi:10.1063/1.3395948

2009

Chapman, Sandra C. and Nicol, R. M. (2009) Generalized similarity in finite range solar wind magnetohydrodynamic turbulence. Physical Review Letters, Vol.103 (No.24). Article no. 241101 . doi:10.1103/PhysRevLett.103.241101

Chapman, Sandra C. and Watkins, Nicholas W. (2009) Avalanching systems under intermediate driving rate. Plasma Physics and Controlled Fusion, Vol.51 (No.12). article no. 124006 . doi:10.1088/0741-3335/51/12/124006

Nicol, R. M., Chapman, Sandra C. and Dendy, R. O. (2009) Quantifying the anisotropy and solar cycle dependence of "1/f" solar wind fluctuations observed by advanced composition explorer. Astrophysical Journal, Vol.703 (No.2). pp. 2138-2151. doi:10.1088/0004-637X/703/2/2138

Kiyani, K., Chapman, Sandra C., Khotyaintsev, Yu. V., Dunlop, M. W. and Sahraoui, F. (2009) Global scale-invariant dissipation in collisionless plasma turbulence. Physical Review Letters, Vol.103 (No.7). Article no. 075006 . doi:10.1103/PhysRevLett.103.075006

Watkins, Nicholas W., Chapman, Sandra C. and Rosenberg, S. J. (2009) Comment on "Coexistence of self-organized criticality and intermittent turbulence in the solar corona". Physical Review Letters, Vol.103 (No.3). article no. 039501. doi:10.1103/PhysRevLett.103.039501

Chapman, Sandra C., Nicol, R. M., Leonardis, E., Kiyani, K. and Carbone, V. (2009) Observation of universality in the generalized similarity of evolving solar wind turbulence as seen by ULYSSES. Astrophysical Journal Letters, Vol.695 (No.2). L185-L188. doi:10.1088/0004-637X/695/2/L185

Watkins, Nicholas W., Credgington, D., Sanchez, R., Rosenberg, S. J. and Chapman, Sandra C. (2009) Kinetic equation of linear fractional stable motion and applications to modeling the scaling of intermittent bursts. Physical Review E (Statistical, Nonlinear, and Soft Matter Physics), Vol.79 (No.4 Part 1). article no. 041124 . doi:10.1103/PhysRevE.79.041124

Kiyani, K., Chapman, Sandra C. and Watkins, Nicholas W. (2009) Pseudo-nonstationarity in the scaling exponents of finite-interval time series. Physical Review E (Statistical, Nonlinear, and Soft Matter Physics), Vol.79 (No.3). doi:10.1103/PhysRevE.79.036109

Chapman, Sandra C., Rowlands, G. (George) and Watkins, Nicholas W. (2009) Macroscopic control parameter for avalanche models for bursty transport. Physics of Plasmas, Vol.16 (No.1). doi:10.1063/1.3057392

Wicks, Robert T., Chapman, Sandra C. and Dendy, R. O. (2009) Spatial correlation of solar wind fluctuations and solar cycle dependence. Astrophysical Journal, Vol.690 (No.1). pp. 734-742. doi:10.1088/0004-637X/690/1/734

Cook, James William S., Chapman, Sandra C. and Dendy, R. O. (2009) Particle-in-cell simulations of the emission mechanism for fusion product-driven ion cyclotron emission from Tokamak plasmas. In: 36th EPS Conference on Plasma Physics, Sofia, Bulgaria, 29 Jun - 3 Jul 2009. Published in: Europhysics conference abstracts, Vol.33E P-4.13.

2008

European Fusion Development Agreement, JET Project (Including: Poli, F. M. (Francesca), Sharapov, S. E. (Sergei E.) and Chapman, Sandra C.). (2008) Study of the spectral properties of ELM precursors by means of wavelets. Plasma Physics and Controlled Fusion, Vol.50 (No.9). p. 5009. doi:10.1088/0741-3335/50/9/095009

Nicol, R. M., Chapman, Sandra C. and Dendy, R. O. (2008) The signature of evolving turbulence in quiet solar wind as seen by Ulysses. Astrophysical Journal, Vol.679 (No.1). pp. 862-870. doi:10.1086/586732

Chapman, Sandra C., Hnat, B. and Kiyani, K. (2008) Solar cycle dependence of scaling in solar wind fluctuations. Nonlinear Processes in Geophysics, Vol.15 (No.3). pp. 445-455. doi:10.5194/npg-15-445-2008

2007

Simon, B., Rowlands, G. (George), Nakariakov, V. M. (Valery M.) and Chapman, Sandra C. (2007) Potential methods for nonlinear slow magnetoacoustic waves in pressure anisotropic high-beta plasmas. Plasma Physics and Controlled Fusion, Vol.49 (No.12). pp. 2005-2017. doi:10.1088/0741-3335/49/12/004

Kiyani, K., Chapman, Sandra C., Hnat, B. and Nicol, Ruth Mary (2007) Self-similar signature of the active solar corona within the inertial range of solar-wind turbulence. Physical Review Letters, Vol.98 . doi:10.1103/PhysRevLett.98.211101

Dendy, R. O., Chapman, Sandra C. and Paczuski, M. (2007) Fusion, space and solar plasmas as complex systems. In: 13th International Congress on Plasma Physics, Kiev, Ukraine, May 22-26, 2006. Published in: Plasma Physics and Controlled Fusion, Vol.49 (No.5A). A95-A108. ISSN 0741-3335. doi:10.1088/0741-3335/49/5A/S08

Wicks, Robert T., Chapman, Sandra C. and Dendy, R. O. (2007) Mutual information as a tool for identifying phase transitions in dynamical complex systems with limited data. Physical Review E, Vol.75 (No.5). Article: 051125. doi:10.1103/PhysRevE.75.051125

Bruno, Roberto, Carbone, Vincenzo, Chapman, Sandra C., Hnat, B., Noullez, Alain and Sorriso-Valvo, Luca (2007) Intermittent character of interplanetary magnetic field fluctuations. Physics of Plasmas, Vol.14 (No.3). Article: 032901. doi:10.1063/1.2711429

Merrifield, J. A., Chapman, Sandra C. and Dendy, R. O. (2007) Intermittency, dissipation, and scaling in two-dimensional magnetohydrodynamic turbulence. Physics of Plasmas, Volume 14 (Number 1). doi:10.1063/1.2409528

Hnat, B., Chapman, Sandra C., Kiyani, K., Rowlands, G. (George) and Watkins, Nicholas W. (2007) On the fractal nature of the magnetic field energy density in the solar wind. Geophysical Research Letters, Vol.34 . doi:10.1029/2007GL029531

Chapman, Sandra C. and Hnat, B. (2007) Quantifying scaling in the velocity field of the anisotropic turbulent solar wind. Geophysical Research Letters, Vol.34 . doi:10.1029/2007GL030518

2006

Dendy, R. O. and Chapman, Sandra C. (2006) Characterization and interpretation of strongly nonlinear phenomena in fusion, space and astrophysical plasmas. In: 33rd European-Physical-Society Conference on Plasma Physics, Angelicum Univ, Rome, ITALY, JUN 19-23, 2006. Published in: PLASMA PHYSICS AND CONTROLLED FUSION, 48 (12B Sp. Iss. SI). B313-B328. ISSN 0741-3335. doi:10.1088/0741-3335/48/12B/S30

Kiyani, K., Chapman, Sandra C. and Hnat, B. (2006) Extracting the scaling exponents of a self-affine, non-Gaussian process from a finite-length time series. PHYSICAL REVIEW E, 74 (5 Part 1). doi:10.1103/PhysRevE.74.051122

2005

Watkins, Nicholas W., Credgington, Daniel, Hnat, B., Chapman, Sandra C., Freeman, Mervyn P. and Greenhough, John (2005) Towards synthesis of solar wind and geomagnetic scaling exponents: A fractional Levy motion model. SPACE SCIENCE REVIEWS, 121 (1-4). pp. 271-284. doi:10.1007/s11214-006-4578-2

Chapman, Sandra C., Hnat, B., Rowlands, G. (George) and Watkins, Nicholas W. (2005) Scaling collapse and structure functions: identifying self-affinity in finite length time series. Nonlinear Processes in Geophysics, Vol.12 . pp. 767-774.

McClements, K. G., Dendy, R. O., Dieckmann, M. E., Ynnerman, A. and Chapman, Sandra C. (2005) Surfatron and stochastic acceleration of electrons in astrophysical plasmas. Journal of Plasma Physics, Vol.71 (No.2). pp. 127-141. doi:10.1017/S0022377804003514

March, T. K., Chapman, Sandra C. and Dendy, R. O. (2005) Mutual information between geomagnetic indices and the solar wind as seen by WIND : implications for propagation time estimates. Geophysical Research Letters, Vol.32 . doi:10.1029/2004GL021677

Hnat, B., Chapman, Sandra C. and Rowlands, G. (George) (2005) Scaling and a Fokker-Planck model for fluctuations in geomagnetic indices and comparison with solar wind as seen by Wind and ACE. Journal of Geophysical Research, Vol.110 . doi:10.1029/2004JA010824

2003

Greenhough, J., Chapman , Sandra C., Chaty, S., Dendy, R. O. and Rowlands , G. (George) (2003) Identification of a 12-17 day timescale in X-ray observations of GRS 1915+105. Monthly Notices of the Royal Astronomical Society, Vol.340 (No.3). pp. 851-855. doi:10.1046/j.1365-8711.2003.06340.x

Hnat, B., Chapman, Sandra C., Rowlands, G. (George), Watkins, Nicholas W. and Freeman, M. P. (Mervyn P.) (2003) Scaling in long term data sets of geomagnetic indices and solar wind ϵ as seen by WIND spacecraft. Geophysical Research Letters, Vol.30 (No.22). doi:10.1029/2003GL018209

2002

Greenhough, J., Birch, P.C., Chapman, Sandra C. and Rowlands, G. (George) (2002) Football goal distributions and extremal statistics. Physica A: Statistical Mechanics and its Applications, Vol.1 (No.4). pp. 615-624. doi:10.1016/S0378-4371(02)01030-0

Greenhough, J., Chapman, Sandra C., Chaty, S., Dendy, R. O. and Rowlands, G. (George) (2002) Characterising anomalous transport in accretion disks from X-ray observations. Astronomy & Astrophysics, Vol.385 (No.2). pp. 693-700. doi:10.1051/0004-6361:20020013

Chapman, Sandra C., Rowlands, G. (George) and Watkins, Nicholas W. (2002) Extremum statistics: a framework for data analysis. Nonlinear Processes in Geophysics, Vol.9 . pp. 409-418.

Hnat, B., Chapman, Sandra C., Rowlands, G. (George), Watkins, Nicholas W. and Farrell, W. M. (William M.) (2002) Finite size scaling in the solar wind magnetic field energy density as seen by WIND. Geophysical Research Letters, Vol.29 (No.10). doi:10.1029/2001GL014587

Hnat, B., Chapman, Sandra C., Rowlands, G. (George), Watkins, Nicholas W. and Freeman, M. P. (Mervyn P.) (2002) Scaling of solar wind e and the AU, AL and AE indices as seen by WIND. Geophysical Research Letters, Vol.29 (No.22). doi:10.1029/2002GL016054

2001

Chapman, Sandra C., Watkins, Nicholas W. and Rowlands, G. (George) (2001) Signatures of dual scaling regimes in a simple avalanche model for magnetospheric activity. Journal of Atmospheric and Solar - Terrestrial Physics, Volume 63 (Number 13). pp. 1361-1370. doi:10.1016/S1364-6826(00)00237-6

Tsalas, M., Chapman, Sandra C. and Rowlands, G. (George) (2001) The stability of charged-particle motion in sheared magnetic reversals. Journal of Plasma Physics, Vol.65 (No.4). pp. 331-352. doi:10.1017/S0022377801001039