新视野号任务中的冥王星高能粒子谱仪科学考察（PEPSSI）
The Pluto Energetic Particle Spectrometer Science Investigation (PEPSSI) on the New Horizons Mission
摘要：
冥王星高能粒子光谱仪科学调查（PEPSSI）包括硬件和伴随的科学调查新视野号航天器，以测量冥王星放气大气层中的拾取离子。在某种程度上，冥王星保留了其类似于自1980年代初以来在恒星掩星中检测到的“重彗星”的特征，这些测量将描述冥王星中性大气的特征，同时提供对相遇时期大气逃逸率的一致性检查，并通过新视野号上的ALICE，REX和SWAP实验从较低高度的大气结构中推导出。此外，PEPSSI将描述任何扩展的电离层和太阳风相互作用的特征，同时还描述冥王星、冥卫一及其相关系统的高能粒子环境。最初于1993年9月提出为冥王星快车飞行任务研制的PEPSSI仪器经历了若干研制阶段，以满足冥王星飞行任务对这种仪器的要求，同时尽量减少所需的航天器资源。PEPSSI仪器可在1.5 kg和~2.5 W的六个扇区中以120度x 12度扇形束测量10 keV至~1 MeV的离子（含成分信息）和电子。
英文摘要：
The Pluto Energetic Particle Spectrometer Science Investigation (PEPSSI) comprises the hardware and accompanying science investigation on the New Horizons spacecraft to measure pick-up ions from Pluto's outgassing atmosphere. To the extent that Pluto retains its characteristics similar to those of a "heavy comet" as detected in stellar occultations since the early 1980s, these measurements will characterize the neutral atmosphere of Pluto while providing a consistency check on the atmospheric escape rate at the encounter epoch with that deduced from the atmospheric structure at lower altitudes by the ALICE, REX, and SWAP experiments on New Horizons. In addition, PEPSSI will characterize any extended ionosphere and solar wind interaction while also characterizing the energetic particle environment of Pluto, Charon, and their associated system. First proposed for development for the Pluto Express mission in September 1993, what became the PEPSSI instrument went through a number of development stages to meet the requirements of such an instrument for a mission to Pluto while minimizing the required spacecraft resources. The PEPSSI instrument provides for measurements of ions (with compositional information) and electrons from 10s of keV to ~1 MeV in a 120 deg x 12 deg fan-shaped beam in six sectors for 1.5 kg and ~2.5 W.
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