Abstract
| Language | English |
|---|---|
| Article number | 02001 |
| Pages | 1-5 |
| Number of pages | 5 |
| Journal | EPJ Web of Conferences |
| Volume | 167 |
| DOIs | |
| Publication status | Published - 9 Jan 2018 |
| Event | Plasma Physics by Laser and Applications - University of Messina, Messina, Italy Duration: 5 Jul 2017 → 7 Jul 2017 |
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Keywords
- high-intensity laser
- electrons
- 2D particle-in-cell modelling
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Escaping electrons from intense laser-solid interactions as a function of laser spot size. / Rusby, Dean; Gray, Ross; Butler, Nicholas; Dance, Rachel; Scott, Graeme ; Bagnoud, Vincent; Zielbauer, Bernhard; McKenna, Paul; Neely, David.
In: EPJ Web of Conferences, Vol. 167, 02001, 09.01.2018, p. 1-5.Research output: Contribution to journal › Conference Contribution
TY - JOUR
T1 - Escaping electrons from intense laser-solid interactions as a function of laser spot size
AU - Rusby, Dean
AU - Gray, Ross
AU - Butler, Nicholas
AU - Dance, Rachel
AU - Scott, Graeme
AU - Bagnoud, Vincent
AU - Zielbauer, Bernhard
AU - McKenna, Paul
AU - Neely, David
PY - 2018/1/9
Y1 - 2018/1/9
N2 - The interaction of a high-intensity laser with a solid target produces an energetic distribution of electrons that pass into the target. These electrons reach the rear surface of the target creating strong electric potentials that act to restrict the further escape of additional electrons. The measurement of the angle, flux and spectra of the electrons that do escape gives insights to the initial interaction. Here, the escaping electrons have been measured using a differentially filtered image plate stack, from interactions with intensities from mid 1020-1017 W/cm2, where the intensity has been reduced by defocussing to increase the size of the focal spot. An increase in electron flux is initially observed as the intensity is reduced from 4x1020 to 6x1018 W/cm2. The temperature of the electron distribution is also measured and found to be relatively constant. 2D particle-in-cell modelling is used to demonstrate the importance of pre-plasma conditions in understanding these observations.
AB - The interaction of a high-intensity laser with a solid target produces an energetic distribution of electrons that pass into the target. These electrons reach the rear surface of the target creating strong electric potentials that act to restrict the further escape of additional electrons. The measurement of the angle, flux and spectra of the electrons that do escape gives insights to the initial interaction. Here, the escaping electrons have been measured using a differentially filtered image plate stack, from interactions with intensities from mid 1020-1017 W/cm2, where the intensity has been reduced by defocussing to increase the size of the focal spot. An increase in electron flux is initially observed as the intensity is reduced from 4x1020 to 6x1018 W/cm2. The temperature of the electron distribution is also measured and found to be relatively constant. 2D particle-in-cell modelling is used to demonstrate the importance of pre-plasma conditions in understanding these observations.
KW - high-intensity laser
KW - electrons
KW - 2D particle-in-cell modelling
UR - http://www.ppla2017.it/
U2 - 10.1051/epjconf/201816702001
DO - 10.1051/epjconf/201816702001
M3 - Conference Contribution
VL - 167
SP - 1
EP - 5
JO - EPJ Web of Conferences
T2 - EPJ Web of Conferences
JF - EPJ Web of Conferences
SN - 2100-014X
M1 - 02001
ER -