Real-time evaluation of laser-driven byproducts is crucial for state-of-the-art facilities operating at high repetition rates.This work presents real-time measurements of hard X-rays(bremsstrahlung radiation) generate...Real-time evaluation of laser-driven byproducts is crucial for state-of-the-art facilities operating at high repetition rates.This work presents real-time measurements of hard X-rays(bremsstrahlung radiation) generated from the interaction of high-intensity laser pulses with solid targets in the target normal sheath acceleration regime using a scintillator stack detector. The detector offers insights into the effectiveness of laser–plasma interaction through measured fiuctuations in bremsstrahlung radiation temperature and scintillation light yield on a shot-to-shot basis. Moreover, a strong correlation of the bremsstrahlung measurements(i.e., temperature and yield) with the cutoff energy of laser-driven protons was observed. The scintillator stack detector serves not only as a diagnostic for online monitoring of the laser–plasma interaction but also as a promising tool for estimating proton energy fiuctuations in a non-disruptive manner, which is particularly important when direct proton source characterization is impractical, for example, during experiments aimed at irradiating user samples with the accelerated proton beam.展开更多
An optical probing of laser–plasma interactions can provide time-resolved measurements of plasma density;however,single-shot and multi-frame probing capabilities generally rely on complex setups with limited flexibil...An optical probing of laser–plasma interactions can provide time-resolved measurements of plasma density;however,single-shot and multi-frame probing capabilities generally rely on complex setups with limited flexibility.We have demonstrated a new method for temporal resolution of the rapid dynamics(∼170 fs)of plasma evolution within a single laser shot based on the generation of several consecutive probe pulses from a single beta barium borate-based optical parametric amplifier using a fraction of the driver pulse with the possibility to adjust the central wavelengths and delays of particular pulses by optical delay lines.The flexibility and scalability of the proposed experimental technique are presented and discussed.展开更多
基金the ELIMAIA experimental team and the L3-HAPLS laser team for the support provided during the experimentfunded by the Ministry of Education, Youth and Sports of the Czech Republic by the project ‘Advanced Research Using High Intensity Laser Produced Photons and Particles’ (CZ.02.1.01/0.0/0.0/16_019/0000789)supported by the European Structural and Investment Fund and the Czech Ministry of Education, Youth and Sports (Project International mobility MSCA-IF IV FZUCZ.02.2.69/0.0/0.0/20-079/0017754)。
文摘Real-time evaluation of laser-driven byproducts is crucial for state-of-the-art facilities operating at high repetition rates.This work presents real-time measurements of hard X-rays(bremsstrahlung radiation) generated from the interaction of high-intensity laser pulses with solid targets in the target normal sheath acceleration regime using a scintillator stack detector. The detector offers insights into the effectiveness of laser–plasma interaction through measured fiuctuations in bremsstrahlung radiation temperature and scintillation light yield on a shot-to-shot basis. Moreover, a strong correlation of the bremsstrahlung measurements(i.e., temperature and yield) with the cutoff energy of laser-driven protons was observed. The scintillator stack detector serves not only as a diagnostic for online monitoring of the laser–plasma interaction but also as a promising tool for estimating proton energy fiuctuations in a non-disruptive manner, which is particularly important when direct proton source characterization is impractical, for example, during experiments aimed at irradiating user samples with the accelerated proton beam.
基金the Ministry of Education,Youth and Sports of the Czech Republic by the project‘Advanced Research Using High Intensity Laser Produced Photons and Particles’(CZ.02.1.010.00.016_0190000789)the IMPULSE project by the European Union Framework Program for Research and Innovation Horizon 2020 under grant agreement No.871161F.Grepl also received funding from the Czech Technical University through the student grant‘SGS16/248/OHK4/3T/14 Výkum optických(nano)struktur a laserového plazmatu’led by Dr.Ing.Ivan Richter(FIS:161-1611617D000).
文摘An optical probing of laser–plasma interactions can provide time-resolved measurements of plasma density;however,single-shot and multi-frame probing capabilities generally rely on complex setups with limited flexibility.We have demonstrated a new method for temporal resolution of the rapid dynamics(∼170 fs)of plasma evolution within a single laser shot based on the generation of several consecutive probe pulses from a single beta barium borate-based optical parametric amplifier using a fraction of the driver pulse with the possibility to adjust the central wavelengths and delays of particular pulses by optical delay lines.The flexibility and scalability of the proposed experimental technique are presented and discussed.
