LP-Infinity：突破COS FUV通道的寿命位置数量限制
LP-Infinity: overcoming limits to the number of lifetime positions in the COS FUV channel
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中文总结 AI 辅助
针对HST的COS FUV通道因飞行软件限制寿命位置为8个的问题，开发LP-Infinity策略突破限制，实现近乎无限的寿命位置，保障其在2030年代持续获取高质量FUV光谱。
中文摘要 AI 辅助
自2009年宇宙起源光谱仪（COS）安装在哈勃空间望远镜（HST）上以来，远紫外（FUV）通道已收集了数千条光谱。由于交叉延迟线探测器固有的增益下降问题，需定期调整光谱位置，第7和第8个寿命位置（LPs）将于2025年10月对用户开放。近期对FUV通道模型的改进，包括更广泛的光学建模、更好的探测器增益下降预测与适配，使我们能识别探测器上此前未被使用的位置以供未来使用，因此需要定义额外的寿命位置（LPs）。由于机载飞行软件将寿命位置的数量限制为8个，我们开发了一种新方法来实现额外的LPs，以避免重新分配已使用LPs的复杂问题。这种被命名为LP-Infinity的新策略，可实现数量近乎无限的LPs，目前仅受探测器可用空间的限制，使COS能在2030年代持续获取高质量的FUV光谱。我们将讨论LP-Infinity的构思、开发与实现、其在第33周期的初始使用，以及从2027年开始的未来LPs计划。
英文摘要
Since the Cosmic Origins Spectrograph (COS) was installed on the Hubble Space Telescope (HST) in 2009, thousands of spectra have been collected with the Far Ultraviolet (FUV) channel. Due to the gain sag inherent in the cross delay line detector, regular adjustments to the positions of the spectra have been made, with the seventh and eighth becoming available to Guest Observers in October 2025. Recent improvements to models of the FUV channel, including more extensive optical modeling and better prediction and accommodation of detector gain sag, have allowed us to identify previously excluded locations on the detector for future use, thus requiring additional Lifetime Positions (LPs) to be defined. Since the onboard flight software limited the number of Lifetime Positions to eight, we developed a new method for implementing additional LPs to avoid dealing with the complications of reassigning previously used LPs. This novel strategy, dubbed LP-Infinity, allows an effectively unlimited number of LPs that is now constrained only by the available detector real estate, allowing COS to continue obtaining high-quality FUV spectra well into the 2030s. We discuss the conception, development and implementation of LP-Infinity, its initial use in Cycle 33, and the plans for future LPs starting in 2027.
