2:45 PM - 3:00 PM
▲ [17p-A501-7] BISER experiments with the Astra and J-KAREN-P lasers
Keywords:Ultrabright coherent x-ray source, Relativistic laser plasma, Burst Intensification by Singularity Emitting Radiation (BISER)
BISER is an ultrabright temporally&spatially coherent x-ray source. We performed BISER experiments with the Astra and J-KAREN-P lasers.
As reported earlier, in the 7 TW Astra experiment we obtained unusually bright ~μJ pulses (17-34nm range, 0.3°×0.2° acceptance angle). Understanding bright coherent x-ray generation physics is an outstanding scientific problem. Here we report on our efforts to perform time-resolved diagnostics of relativistic plasma singularities.
Another outstanding task is to measure the total BISER pulse energy, for which we need to know its near-axis angular distribution. This requires placing x-ray diagnostics close to the interaction point. The challenge is to avoid x-ray filter damage and multi-TW laser focusing onto an x-ray CCD. In the J-KAREN-P experiment, we performed filter damage threshold studies, followed by the damage-free BISER angular distribution measurements in the ±2.5° cone. It showed that under optimum conditions BISER had ~100μJ pulses.
As reported earlier, in the 7 TW Astra experiment we obtained unusually bright ~μJ pulses (17-34nm range, 0.3°×0.2° acceptance angle). Understanding bright coherent x-ray generation physics is an outstanding scientific problem. Here we report on our efforts to perform time-resolved diagnostics of relativistic plasma singularities.
Another outstanding task is to measure the total BISER pulse energy, for which we need to know its near-axis angular distribution. This requires placing x-ray diagnostics close to the interaction point. The challenge is to avoid x-ray filter damage and multi-TW laser focusing onto an x-ray CCD. In the J-KAREN-P experiment, we performed filter damage threshold studies, followed by the damage-free BISER angular distribution measurements in the ±2.5° cone. It showed that under optimum conditions BISER had ~100μJ pulses.