Abstract
| Original language | English |
|---|---|
| Article number | 023111 |
| Number of pages | 8 |
| Journal | Physics of Plasmas |
| Volume | 21 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 21 Feb 2014 |
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Keywords
- ion acceleration
- shocks
- laser accelerator
- acoustic double layers
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Ion shock acceleration by large amplitude slow ion acoustic double layers in laser-produced plasmas. / Eliasson, Bengt.
In: Physics of Plasmas, Vol. 21, No. 2, 023111, 21.02.2014.Research output: Contribution to journal › Article
TY - JOUR
T1 - Ion shock acceleration by large amplitude slow ion acoustic double layers in laser-produced plasmas
AU - Eliasson, Bengt
PY - 2014/2/21
Y1 - 2014/2/21
N2 - A kinetic model for the shock acceleration of ions in laser-produced plasmas is developed. A fraction of the warm ions are accelerated by the large amplitude monotonic potential of the shock created due the plasma compression and electron heating by the laser. The kinetic model for the monotonic shock is based on the slow ion acoustic double layer (SIADL). It is found that the amplitude of the large amplitude SIADL is almost uniquely defined by the electron temperature. Therefore, a balance between electron heating and plasma compression is needed for optimal ion acceleration by this scheme. Typical Mach numbers of the monotonic shocks are close to 1.5. The scheme could potentially produce monoenergetic ions with a relative energy spread of less than 1%. The model is compared with recent simulations and experiments, where efficient shocks acceleration and production of monoenergetic protons have been observed. Similarities and differences with other shock models are pointed out and discussed.
AB - A kinetic model for the shock acceleration of ions in laser-produced plasmas is developed. A fraction of the warm ions are accelerated by the large amplitude monotonic potential of the shock created due the plasma compression and electron heating by the laser. The kinetic model for the monotonic shock is based on the slow ion acoustic double layer (SIADL). It is found that the amplitude of the large amplitude SIADL is almost uniquely defined by the electron temperature. Therefore, a balance between electron heating and plasma compression is needed for optimal ion acceleration by this scheme. Typical Mach numbers of the monotonic shocks are close to 1.5. The scheme could potentially produce monoenergetic ions with a relative energy spread of less than 1%. The model is compared with recent simulations and experiments, where efficient shocks acceleration and production of monoenergetic protons have been observed. Similarities and differences with other shock models are pointed out and discussed.
KW - ion acceleration
KW - shocks
KW - laser accelerator
KW - acoustic double layers
UR - http://scitation.aip.org/content/aip/journal/pop/
UR - http://arxiv.org/abs/1401.1676
U2 - 10.1063/1.4866240
DO - 10.1063/1.4866240
M3 - Article
VL - 21
JO - Physics of Plasmas
JF - Physics of Plasmas
SN - 1070-664X
IS - 2
M1 - 023111
ER -