Zobrazeno 1 - 10
of 13 179
pro vyhledávání: '"Allan, S. A."'
Autor:
Damizia, Y., Elmore, S., Verhaegh, K., Ryan, P., Allan, S., Federici, F., Osborne, N., Bradley, J. W., Team, the MAST-U, Team, the EUROfusion Tokamak Exploitation
This study presents ion temperature (\(T_i\)) measurements in the MAST-U divertor, using a Retarding Field Energy Analyzer (RFEA). Steady state measurements were made during an L-Mode plasma with the strike point on the RFEA. ELM measurements were ma
Externí odkaz:
http://arxiv.org/abs/2411.07881
Autor:
Inguva, Pavan K., Mukherjee, Saikat, Walker, Pierre J., Kanso, Mona A., Wang, Jie, Wu, Yanchen, Tenberg, Vico, Santra, Srimanta, Singh, Shalini, Kim, Shin Hyuk, Trout, Bernhardt L., Bazant, Martin Z., Myerson, Allan S., Braatz, Richard D.
Nucleic acids such as mRNA have emerged as a promising therapeutic modality with the capability of addressing a wide range of diseases. Lipid nanoparticles (LNPs) as a delivery platform for nucleic acids were used in the COVID-19 vaccines and have re
Externí odkaz:
http://arxiv.org/abs/2408.08577
Autor:
Damizia, Y., Elmore, S., Ryan, P., Allan, S., Federici, F., Osborne, N., Bradley, J. W., Team, the MAST-U
This study presents the first ion temperature (\(T_i\)) measurements from the MAST-U divertor using a Retarding Field Energy Analyzer (RFEA). Embedded within the flat tile of the closed divertor chamber, the RFEA captures \(T_i\) profiles across vari
Externí odkaz:
http://arxiv.org/abs/2407.01246
Strong field terahertz pulses are increasingly used to excite and control quantum materials at the ultrafast timescale. They have found widespread application by enabling direct addressing of the superconducting gap or Josephson resonances and are es
Externí odkaz:
http://arxiv.org/abs/2403.04538
Autor:
Munoz, Gilberto A. de la Pena, Correa, Alfredo A., Yang, Shan, Delaire, Olivier, Huang, Yijing, Johnson, Allan S., Katayama, Tetsuo, Krapivin, Viktor, Pastor, Ernest, Reis, David A., Teitelbaum, Samuel, Vidas, Luciana, Wall, Simon, Trigo, Mariano
In the prevalent picture of ultrafast structural phase transitions, the atomic motion occurs in a slowly varying potential energy surface determined adiabatically by the fast electrons. However, this ignores non-conservative forces caused by electron
Externí odkaz:
http://arxiv.org/abs/2402.13133
Autor:
Sarkar, Arnab, Johnson, Allan S.
Condensed phase systems often exhibit a mixture of deterministic and stochastic dynamics at the nanoscale which are essential to understanding their function, but can be challenging to study directly using conventional imaging methods. Coherent X-ray
Externí odkaz:
http://arxiv.org/abs/2402.10585
Autor:
Brahms, Christian, Zhang, Lin, Shen, Xiao, Bhattacharya, Utso, Recasens, Maria, Osmond, Johann, Grass, Tobias, Chhajlany, Ravindra W., Hallman, Kent A., Haglund, Richard F., Pantelides, Sokrates T., Lewenstein, Maciej, Travers, John C., Johnson, Allan S.
The nature of the insulator-to-metal phase transition in vanadium dioxide (VO2) is one of the longest-standing problems in condensed-matter physics. Ultrafast spectroscopy has long promised to determine whether the transition is primarily driven by t
Externí odkaz:
http://arxiv.org/abs/2402.01266
Autor:
Zhang, Lin, Bhattacharya, Utso, Recasens, Maria, Grass, Tobias, Chhajlany, Ravindra W., Lewenstein, Maciej, Johnson, Allan S.
Nonequilibrium phase transitions driven by light pulses represent a rapidly developing field in condensed matter physics. As one of the archetypal strongly correlated materials, vanadium dioxide (VO2) undergoes a structural phase transition (SPT) fro
Externí odkaz:
http://arxiv.org/abs/2402.01247
Determination and correction of spectral phase from principal component analysis of coherent phonons
Publikováno v:
Optics Express 32, 3817 (2024)
Measuring the spectral phase of a pulse is key for performing wavelength resolved ultrafast measurements in the few femtosecond regime. However, accurate measurements in real experimental conditions can be challenging. We show that the reflectivity c
Externí odkaz:
http://arxiv.org/abs/2311.14853
Autor:
Marlon H. Cardoso, Lucas R. de Lima, Allan S. Pires, Mariana R. Maximiano, Peta J. Harvey, Camila G. Freitas, Rosiane A. Costa, Isabel C. M. Fensterseifer, Pietra O. Rigueiras, Ludovico Migliolo, William F. Porto, David J. Craik, Octávio L. Franco
Publikováno v:
ACS Omega, Vol 9, Iss 45, Pp 45297-45308 (2024)
Externí odkaz:
https://doaj.org/article/f7a5ef62dd434c6c9e3cb5631ebb4933
