The Maunakea Spectroscopic Explorer (MSE) project will transform the CFHT 3.6m optical telescope to a 10m class dedicated multi-object spectroscopic facility, with an ability to measure thousands of objects with three spectral resolution modes respectively low resolution of R~3,000, moderate resolution of R~6,000 and high resolution of R~40,000. Two identical multi-object high resolution spectrographs are expected to simultaneously produce 1084 spectra with high resolution of 40,000 at Blue (401-416nm) and Green (472-489nm) channels, and 20,000 at Red (626-674nm) channel. At the Conceptual Design Phase (CoDP), different optical schemes were proposed to meet the challenging requirements, especially a unique design with a novel transmission image slicer array, and another conventional design with oversize Volume Phase Holographic (VPH) gratings. It became clear during the CoDP that both designs presented problems of complexity or feasibility of manufacture, especially high line density disperser (general name for all kinds of grating, grism, prism). At the present, a new design scheme is proposed for investigating the optimal way to reduce technical risk and get more reliable estimation of cost and timescale. It contains new dispersers, F/2 fast collimator and so on. Therein, the disperser takes advantage of a special grism and a prism to reduce line density on grating surface, keep wide opening angle of optical path, and get the similar spectrum layout in all three spectral channels. For the fast collimator, it carefully compares on-axis and off-axis designs in throughput, interface to fiber assembly and technical risks. The current progress is more competitive and credible than the previous design, but it also indicates more challenging work will be done to improve its accessibility in engineering.
Optimal scheduling and science delivery of spectra for millions of targets in thousands of fields: the operational concept of the Maunakea spectroscopic explorer (MSE)
Transforming the Canada France Hawaii Telescope (CFHT) into the Maunakea Spectroscopic Explorer (MSE): A Conceptual Observatory Building and Facilities Design
Maximising the sensitivity of next generation multi-object spectroscopy: system budget development and design optimizations for the Maunakea Spectroscopic Explorer
这是Maunakea Spectroscopic Explorer 2018图书。它旨在为国际天文学和工程界以及相关机构提供MSE科学和技术设计的所有方面的简明参考指南。当前版本是MSE科学目标及其实际实施的状态报告，继2018年1月举行的系统概念设计审查之后。MSE是一个计划中的10米级、宽视场、光学和近红外设施，旨在实现变革性科学，同时填补新兴的国际大型天文设施网络中的一个关键空白。MSE完全致力于数千至数百万天体样本的多目标光谱学。由于其独特的设计能力，它将在这一领域引领世界：它将拥有大口径（11.25米）和宽（1.52平方米）。度）视野;它将有能力以从R2500到R40,000的宽范围的光谱分辨率进行观测，具有大规模的多路复用（每次曝光4332个光谱，所有光谱分辨率在任何时候都可用），并且对目标观测效率超过80%。MSE将揭示微弱宇宙的组成和动力学，旨在精确研究微弱的天体物理现象。它还将为多波长成像调查提供关键的后续行动，例如大型综合巡天望远镜，盖亚，欧几里得，宽视场红外巡天望远镜，平方公里阵列和下一代甚大阵列。
