High Power Laser Science and Engineering, Volume. 7, Issue 3, 03000e53(2019)
Single-shot electrons and protons time-resolved detection from high-intensity laser–solid matter interactions at SPARC_LAB
Fig. 1. Experimental setup. The FLAME laser is sent to a stainless steel target. The charged particles emitted during this interaction are revealed by two single-shot time-resolved measurements: an electro-optical sampling diagnostic, able to measure the electric field carried by relativistic fast electrons, and a time-of-flight diamond detector, used to measure the temporal distribution of protons arriving on it and retrieve their energy spectra.
Fig. 2. Time-of-flight detector geometry. Schematic representation of the device layer structure (left) and picture of the surface Al interdigitated electrodes (right). The metal fingers were processed to
Fig. 3. Typical 2D electric field carried by fast electrons as seen by our EOS diagnostic tool. The signal thickness is related to the temporal duration of the electric field. The typical shape is a direct consequence of our setup geometry[27].
Fig. 4. Line profile traced along the signal in Figure
Fig. 5. Typical signal provided by the TOF detector as seen by our 2 GHz Lecroy 620ZI oscilloscope. As one can see, it is possible to distinguish between two different signals arriving at different times: the first is associated with X-rays and low-energy electrons coming at the early stage of the interaction; the second is related to protons accelerated through the TNSA mechanism.
Fig. 6. Monte Carlo simulations by the SRIM code results for
Fig. 7. Proton energy spectra retrieved from the data in Figure
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F. Bisesto, M. Galletti, M. P. Anania, M. Ferrario, R. Pompili, M. Botton, A. Zigler, F. Consoli, M. Salvadori, P. Andreoli, C. Verona. Single-shot electrons and protons time-resolved detection from high-intensity laser–solid matter interactions at SPARC_LAB[J]. High Power Laser Science and Engineering, 2019, 7(3): 03000e53
Category: Research Articles
Received: Mar. 12, 2019
Accepted: Jul. 1, 2019
Published Online: Aug. 26, 2019
The Author Email: F. Bisesto (fabrizio.giuseppe.bisesto@lnf.infn.it)