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Malcolm McMahon

PROF

 https://orcid.org/0000-0003-4343-344X

Personal profile

Research Interests

Prof McMahon's research is in the behaviour of materials at extremes of pressure and temperature.

At extreme pressures, where atoms are pushed close together, it was long assumed that all materials would become metallic, with simple, close-packed crystal structures. By investigating the structures of materials under such conditions using synchrotron radiation, McMahon’s research has shown that this is untrue, and that even the simplest of elements adopt wholly unexpected structural complexity at high density. The array of complex and incommensurate structures that has been unveiled are unlike anything seen at ambient conditions. In addition to using synchrotron storage rings, McMahon also uses large laser platforms and x-ray lasers to investigate the behaviour of materials under dynamic compression on femtosecond timescales.

McMahon was awarded a DSc degree by the University of Edinburgh in 2006, and appointed to a Personal Chair in High Pressure Physics in 2007. He is a Fellow of the Institute of Physics, and holds a William Penney Fellowship with AWE. He was awarded the inaugural Louis Delbaere Prize of the Canadian Light Source in 2010, and awarded a Humboldt Research Award in 2013.

Teaching

I am Course Organiser for the 2nd year Practical Physics course, and class leader for both the Data Analysis and Laboratory components of this course.

I host both Senior Honours and MPhys projects.

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  • Phase transition kinetics of superionic H2O ice phases revealed by Megahertz X-ray free-electron laser-heating experiments

    Husband, R. J., Liermann, H. P., McHardy, J. D., McWilliams, R. S., Goncharov, A. F., Prakapenka, V. B., Edmund, E., Chariton, S., Konôpková, Z., Strohm, C., Sanchez-Valle, C., Frost, M., Andriambariarijaona, L., Appel, K., Baehtz, C., Ball, O. B., Briggs, R., Buchen, J., Cerantola, V., Choi, J., & 20 othersColeman, A. L., Cynn, H., Dwivedi, A., Graafsma, H., Hwang, H., Koemets, E., Laurus, T., Lee, Y., Li, X., Marquardt, H., Mondal, A., Nakatsutsumi, M., Ninet, S., Pace, E., Pepin, C., Prescher, C., Stern, S., Sztuk-Dambietz, J., Zastrau, U. & McMahon, M. I., 23 Sept 2024, In: Nature Communications. 15, 1, p. 1-13 13 p., 8256.

    Research output: Contribution to journal › Article › peer-review

    Open Access

  • Measurement bias in self-heating x-ray free electron laser experiments from diffraction studies of phase transformation in titanium

    Ball, OB., Husband, RJ., McHardy, JD., McMahon, MI., Strohm, C., Konôpková, Z., Appel, K., Cerantola, V., Coleman, AL., Cynn, H., Dwivedi, A., Goncharov, AF., Graafsma, H., Huston, LQ., Hwang, H., Kaa, J., Kim, JY., Koemets, E., Laurus, T., Li, X., & 18 othersMarquardt, H., Méndez, ASJ., Merkel, S., Mondal, A., Morard, G., Prakapenka, VB., Prescher, C., Preston, TR., Speziale, S., Stern, S., Sturtevant, BT., Sztuk-Dambietz, J., Velisavljevic, N., Yoo, CS., Zastrau, U., Jenei, Z., Liermann, HP. & McWilliams, RS., 21 Sept 2024, In: Journal of applied physics. 136, 11, p. 1-12 12 p., 115902.

    Research output: Contribution to journal › Article › peer-review

    Open Access

  • Crystal structures of lanthanum to 230 GPa

    Storm, C. V., Roy, C. R., Munro, K. A. & McMahon, M. I., 16 Jul 2024, In: Physical Review B. 110, 2, p. 1-9 9 p., 024107.

    Research output: Contribution to journal › Article › peer-review

    Open Access

  • Shock compression experiments using the DiPOLE 100-X laser on the high energy density instrument at the European x-ray free electron laser: Quantitative structural analysis of liquid Sn

    Gorman, MG., McGonegle, D., Smith, RF., Singh, S., Jenkins, T., McWilliams, RS., Albertazzi, B., Ali, SJ., Antonelli, L., Armstrong, MR., Baehtz, C., Ball, OB., Banerjee, S., Belonoshko, AB., Benuzzi-Mounaix, A., Bolme, CA., Bouffetier, V., Briggs, R., Buakor, K., Butcher, T., & 105 othersCafiso, SD., Cerantola, V., Chantel, J., Di Cicco, A., Clarke, S., Coleman, AL., Collier, J., Collins, GW., Comley, AJ., Coppari, F., Cowan, TE., Cristoforetti, G., Cynn, H., Descamps, A., Dorchies, F., Duff, MJ., Dwivedi, A., Edwards, C., Eggert, JH., Errandonea, D., Fiquet, G., Galtier, E., Garcia, AL., Ginestet, H., Gizzi, L., Gleason, A., Goede, S., Gonzalez, JM., Harmand, M., Hartley, NJ., Heighway, PG., Hernandez-Gomez, C., Higginbotham, A., Höppner, H., Husband, RJ., Hutchinson, TM., Hwang, H., Lazicki, AE., Keen, DA., Kim, J., Koester, P., Konopkova, Z., Kraus, D., Krygier, A., Labate, L., Lee, Y., Liermann, HP., Mason, P., Masruri, M., Massani, B., McBride, EE., MGguire, C., McHardy, JD., Merkel, S., Morard, G., Nagler, B., Nakatsutsumi, M., Nguyen-Cong, K., Norton, AM., Oleynik, II., Otzen, C., Ozaki, N., Pandolfi, S., Peake, DJ., Pelka, A., Pereira, KA., Phillips, JP., Prescher, C., Preston, TR., Randolph, L., Ranjan, D., Ravasio, A., Redmer, R., Rips, J., Santamaria-Perez, D., Savage, DJ., Schoelmerich, M., Schwinkendorf, JP., Smith, J., Sollier, A., Spear, J., Spindloe, C., Stevenson, M., Strohm, C., Suer, TA., Tang, M., Toncian, M., Toncian, T., Tracy, SJ., Trapananti, A., Tschentscher, T., Tyldesley, M., Vennari, CE., Vinci, T., Vogel, SC., Volz, TJ., Vorberger, J., Walsh, JPS., Wark, JS., Willman, JT., Wollenweber, L., Zastrau, U., Brambrink, E., Appel, K. & McMahon, MI., 28 Apr 2024, In: Journal of applied physics. 135, 16, p. 1-11 11 p., 165902.

    Research output: Contribution to journal › Article › peer-review

    Open Access

  • Thermal equation of state of rhodium to 191 GPa and 2700 K using double-sided flash laser heating in a diamond anvil cell

    McHardy, J. D., Storm, C. V., Duff, M. J., Lonsdale, C. M., Woolman, G. A., McMahon, M. I., Giordano, N. & MacLeod, S. G., 21 Mar 2024, In: Physical Review B - Condensed Matter and Materials Physics. 109, 9, p. 1-13 13 p., 094113.

    Research output: Contribution to journal › Article › peer-review

    Open Access
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