Proton acceleration by a relativistic laser frequency-chirp driven plasma snowplow
| Autor: | Sahai, Aakash A., Katsouleas, T. C., Bingham, R. A., Tsung, F. S., Tableman, A. R., Tzoufras, M., Mori, W. B. |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Proceedings of IPAC2012, pp.2654-2656, 07 Accelerator Technology and Main Systems, T25 Lasers, ISBN 978-3-95450-115-1 |
| Druh dokumentu: | Working Paper |
| Popis: | We analyze the use of a relativistic laser pulse with a controlled frequency chirp incident on a rising plasma density gradient to drive an acceleration structure for proton and light-ion acceleration. The Chirp Induced Transparency Acceleration (ChITA) scheme is described with an analytical model of the velocity of the snowplow at critical density on a pre-formed rising plasma density gradient that is driven by a positive-chirp in the frequency of a relativistic laser pulse. The velocity of the ChITA-snowplow is shown to depend upon rate of rise of the frequency of the relativistic laser pulse represented by $\frac{\epsilon_0}{\theta}$ where, $\epsilon_0 = \frac{\Delta\omega_0}{\omega_0}$ and chirping spatial scale-length, $\theta$, the normalized magnetic vector potential of the laser pulse $a_0$ and the plasma density gradient scale-length, $\alpha$. We observe using 1-D OSIRIS simulations the formation and forward propagation of ChITA-snowplow, being continuously pushed by the chirping laser at a velocity in accordance with the analytical results. The trace protons reflect off of this propagating snowplow structure and accelerate mono-energetically. The control over ChITA-snowplow velocity allows the tuning of accelerated proton energies. Comment: Proceedings of IPAC2012, New Orleans, Louisiana, USA, pp.2654-2656, 07 Accelerator Technology and Main Systems, T25 Lasers, ISBN 978-3-95450-115-1. http://accelconf.web.cern.ch/accelconf/ipac2012/papers/weppd059.pdf |
| Databáze: | arXiv |
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