A linear cryogenic 16-pole wire ion trap has been developed and constructed for cryogenic ion spectroscopy at temperatures below 4 K. The trap is temperature-variable, can be operated with different buffer gases, and offers large optical access perpendicular to the ion beam direction. The housing geometry enables temperature measurement during radio frequency operation. The effective trapping potential of the wire-based radio frequency trap is described and compared to conventional multipole ion trap designs. Furthermore, time-of-flight mass spectra of multiple helium tagged protonated glycine ions that are extracted from the trap are presented, which prove very low ion temperatures and suitable conditions for sensitive spectroscopy.

中文翻译：

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亚 4 开尔文射频线性多极线陷波器

已经开发并构建了一种线性低温 16 极线离子阱，用于温度低于 4 K 的低温离子光谱。该阱是温度可变的，可以使用不同的缓冲气体操作，并提供垂直于离子束方向的大光学通路. 外壳几何形状可以在射频操作期间进行温度测量。描述了基于线的射频阱的有效捕获电位，并将其与传统的多极离子阱设计进行了比较。此外，还提供了从离子阱中提取的多个氦标记质子化甘氨酸离子的飞行时间质谱，这证明了非常低的离子温度和适合灵敏光谱的条件。