High repetition-rate (∼10 kHz) ps-lasers are becoming available on the market with reasonable cost and may offer several advantages compared to ns-lasers by generating nearly continuous beams of singly charged ions appropriate for the "slow" injection mode into the Electron Beam Ion Source (EBIS). To evaluate these advantages, we will perform studies of a ps-laser generated plasma using a laser with a pulse duration of 8 ps and energy up to 5 mJ per pulse. A vacuum chamber equipped with a 3D target positioner, a focusing lens, and a Faraday Cup has been designed and built for this study. Lens-to-target distance variations have been measured using a laser tracker over the whole range of horizontal and vertical translation for all five targets we will use. The variations were found to be within ±150 µm. This degree of "target flatness" should be acceptable for our experimental conditions. Ion currents and ion pulse durations of various elements (from Al to Ta) will be measured for different target irradiation conditions (focal spot size and laser pulse energy). The results obtained will allow us to specify all parameters and geometry of a laser ion source based on a ps-laser to provide external ion injection into the relativistic heavy ion collider EBIS.

中文翻译：

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设计目标照射和诊断室，以研究 ps 激光产生的等离子体作为单电荷离子源，用于外部注入电子束离子源

高重复率 (∼10 kHz) ps 激光器正以合理的成本在市场上出售，与 ns 激光器相比，通过生成适用于“慢”注入模式的近乎连续的单电荷离子束，可以提供多种优势。电子束离子源 (EBIS)。为了评估这些优势，我们将使用脉冲持续时间为 8 ps 且能量高达每脉冲 5 mJ 的激光器对 ps 激光产生的等离子体进行研究。为这项研究设计并建造了配备 3D 目标定位器、聚焦透镜和法拉第杯的真空室。在我们将使用的所有五个目标的整个水平和垂直平移范围内，使用激光跟踪器测量了镜头到目标的距离变化。发现变化在±150 µm 内。这种程度的“