Resorcinol/formaldehyde (RF) foam resin is an attractive material as a low-density target in high-power laser–plasma experiments because of its fine network structure, transparency in the visible region, and low-Z element (hydrogen, carbon, and oxygen) composition. In this study, we developed disk-shaped RF foam and deuterated RF foam targets with 40–200 μm thickness and approximately 100 mg/cm3 density having a network structure from 100 nm to a few micrometers cell size. By deuteration, the polymerization rate was drastically slowed down owing to kinetic isotope effects. These targets were used in high-power laser experiments where a megaelectronvolt proton beam was successfully generated.

中文翻译：

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用于激光等离子体实验的圆盘形氘代间苯二酚/甲醛泡沫靶的制造

间苯二酚/甲醛 (RF) 泡沫树脂由于其精细的网络结构、可见光区域的透明性和低Z元素（氢、碳和氧）组成。在这项研究中，我们开发了厚度为 40-200 μm 和约 100 mg/cm 的圆盘形 RF 泡沫和氘化 RF 泡沫靶3密度具有从 100 nm 到几微米单元尺寸的网络结构。通过氘化，由于动力学同位素效应，聚合速率显着减慢。这些目标被用于成功产生兆电子伏质子束的高功率激光实验。