Apollon短焦区装置在1 PW功率水平调试后的特性表征与性能
Characterization and performance of the Apollon Short-Focal-Area facility following its commissioning at 1 PW level
AI总结：
本文报道Apollon装置SFA在1 PW下的首次调试，表征焦斑、脉冲和靶密度梯度等参数，并验证其耦合效率达到国际同类装置水平。
摘要：
我们介绍了Apollon激光装置（位于法国Saclay）“短焦距”区域（SFA）第一阶段调试的结果，该调试利用首个可用激光束（F2）进行，其标称功率缩放至1拍瓦。在所测试条件下，该光束在靶上交付平均能量10 J、持续时间24 fs的脉冲。研究部署了多项诊断以评估装置性能。靶上焦斑、其空间稳定性、主脉冲之前的时间强度剖面，以及固体靶受照侧形成的相应密度梯度，均得到全面表征，旨在帮助用户设计未来实验。研究记录了高能电子、离子和电磁辐射的发射，显示出良好的激光—靶耦合效率，且整体性能可与同类国际装置相比。随后将在2022年进行多拍瓦水平的进一步调试阶段。
英文摘要：
We present the results of the first commissioning phase of the ``short focal length'' area (SFA) of the Apollon laser facility (located in Saclay, France), which was performed with the first available laser beam (F2), scaled to a nominal power of one petawatt. Under the conditions that were tested, this beam delivered on target pulses of 10 J average energy and 24 fs duration. Several diagnostics were fielded to assess the performance of the facility. The on-target focal spot, its spatial stability, the temporal intensity profile prior to the main pulse, as well as the resulting density gradient formed at the irradiated side of solid targets, have been thoroughly characterized, with the goal of helping users design future experiments. Emissions of energetic electrons, ions, and electromagnetic radiation were recorded, showing good laser-to-target coupling efficiency and an overall performance comparable with that of similar international facilities. This will be followed in 2022 by a further commissioning stage at the multi-petawatt level.
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