Mauna Kea Spectroscopic Explorer (MSE): a preliminary design of multi-object high resolution spectrograph

Zhang, Kai; Zhou, Yifei; Tang, Zhen; Saunders, Will; Venn, Kim A.; Shi, Jianrong; McConnachie, Alan W.; Szeto, Kei; Wang, Lei; Zhu, Yongtian; Hu, Zhongwen

doi:10.1117/12.2312685

Cited by 8 publications

(1 citation statement)

References 12 publications

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“…The current design for the MSE HR spectrograph is presented in detail by Zhang et al [8]. It consists of 3 arms with 300mm beam size and f/1.5 cameras with 91mm  91mm detectors.…”

Section: Introductionmentioning

confidence: 99%

Higher dispersion and efficiency Bragg gratings for optical spectroscopy

Saunders

Zhang

Flügel-Paul

2018

Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III

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Massively multiplexed spectroscopic stellar surveys such as MSE present enormous challenges in the spectrograph design. The combination of high multiplex, large telescope aperture, high resolution (R~40,000) and natural seeing implies that multiple spectrographs with large beam sizes, large grating angles, and fast camera speeds are required, with high cost and risk. An attractive option to reduce the beam size is to use Bragg-type gratings at much higher angles than hitherto considered. As well as reducing the spectrograph size and cost, this also allows the possibility of very high efficiency due to a close match of s and p-polarization Bragg efficiency peaks. The grating itself could be a VPH grating, but Surface Relief (SR) gratings offer an increasingly attractive alternative, with higher maximum line density and better bandwidth. In either case, the grating needs to be immersed within large prisms to get the light to and from the grating at the required angles. We present grating designs and nominal spectrograph designs showing the efficiency gains and size reductions such gratings might allow for the MSE high resolution spectrograph.

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“…The current design for the MSE HR spectrograph is presented in detail by Zhang et al [8]. It consists of 3 arms with 300mm beam size and f/1.5 cameras with 91mm  91mm detectors.…”

Section: Introductionmentioning

confidence: 99%

Higher dispersion and efficiency Bragg gratings for optical spectroscopy

Saunders

Zhang

Flügel-Paul

2018

Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III

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Transforming the Canada France Hawaii Telescope (CFHT) into the Maunakea Spectroscopic Explorer (MSE): a conceptual observatory building and facilities design

Bauman

Barrick

Benedict

et al. 2018

Observatory Operations: Strategies, Processes, and Systems VII

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The Canada France Hawaii Telescope Corporation (CFHT) plans to repurpose its observatory on the summit of Maunakea and operate a new wide field spectroscopic survey telescope, the Maunakea Spectroscopic Explorer (MSE). MSE will upgrade the observatory with a larger 11.25m aperture telescope and equip it with dedicated instrumentation to capitalize on the site, which has some of the best seeing in the northern hemisphere, and offer its user's community the ability to do transformative science. The knowledge and experience of the current CFHT staff will contribute greatly to the engineering of this new facility.MSE will reuse the same building and telescope pier as CFHT. However, it will be necessary to upgrade the support pier to accommodate a bigger telescope and replace the current dome since a wider slit opening of 12.5 meters in diameter is needed. Once the project is completed the new facility will be almost indistinguishable on the outside from the current CFHT observatory. MSE will build upon CFHT's pioneering work in remote operations, with no staff at the observatory during the night, and use modern technologies to reduce daytime maintenance work. This paper describes the design approach for redeveloping the CFHT facility for MSE including the infrastructure and equipment considerations required to support and facilitate nighttime observations. The building will be designed so existing equipment and infrastructure can be reused wherever possible while meeting new requirement demands. Past experience and lessons learned will be used to create a modern, optimized, and logical layout of the facility. The purpose of this paper is to provide information to readers involved in the MSE project or organizations involved with the redevelopment of an existing observatory facility for a new mission.

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Optimal scheduling and science delivery of spectra for millions of targets in thousands of fields: the operational concept of the Maunakea spectroscopic explorer (MSE)

Flagey

McConnachie

Szeto

et al. 2018

Observatory Operations: Strategies, Processes, and Systems VII

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The Maunakea Spectroscopic Explorer (MSE) will each year obtain millions of spectra in the optical to nearinfrared, at low (R 3000) to high (R 40000) spectral resolution by observing >3000 spectra per pointing via a highly multiplexed fiber-fed system. Key science programs for MSE include black hole reverberation mapping, stellar population analysis of faint galaxies at high redshift, and sub-km/s velocity accuracy for stellar astrophysics.The architecture of MSE is an assembly of subsystems designed to meet the science requirements and describes what MSE will look like. In this paper we focus on the operations concept of MSE, which describes how to operate a fiber fed, highly multiplexed, dedicated observatory given its architecture and the science requirements.The operations concept details the phases of operations, from selecting proposals within the science community to distributing back millions of spectra to this community. For each phase, the operations concept describes the tools required to support the science community in their analyses and the operations staff in their work. It also highlights the specific needs related to the complexity of MSE with millions of targets to observe, thousands of fibers to position, and different spectral resolution to use. Finally, the operations concept shows how the science requirements on calibration and observing efficiency can be met. is presented this year in Ref. 4 with a review of the instrumentation suite in Ref. 5. Other papers related to MSE are focusing on: the summit facility upgrade (Ref. 6, 7), the telescope optical design for MSE (Ref. 8), the telescope structure design (Ref. 9), the design for the high-resolution (Ref. 10, 11) and the low/moderateresolution spectrograph (Ref. 12), the top end assembly (Ref. 13, 14), the fiber bundle system (Ref. 15, 16), the Sphinx fiber positioner system (Ref. 17), the systems budgets architecture and development (Ref. 18, 19), the observatory software (Ref. 20), the spectral calibration (Ref. 21, 22), the throughput optimization (Ref. 23, 24), the injection efficiency (Ref. 25), and the observing efficiency (Ref. 26).MSE will be a facility dedicated to spectroscopic surveys. Multiple surveys will be executed in parallel to make the best use of the observatory capabilities, with both LMR and HR spectrographs simultaneously available at all time and sharing the telescope's field of view. While the surveys are envisioned to be multi-year large programs (LP), we expect that some observing time might be allocated to small programs (SP) that will likely be more focused, require smaller amounts of telescope time or number of fibers, and typically lead to more rapid publications. Even though MSE will be a significantly different facility than CFHT, the operations of MSE will benefit from CFHT's experience in queue service observations and from the transition that has already happened at CFHT with an increased importance of LPs and survey oriented operations.In this paper we focus on the operations concept of MSE: how MSE will ...

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Mauna Kea Spectroscopic Explorer (MSE): a preliminary design of multi-object high resolution spectrograph

Cited by 8 publications

References 12 publications

Higher dispersion and efficiency Bragg gratings for optical spectroscopy

Higher dispersion and efficiency Bragg gratings for optical spectroscopy

Transforming the Canada France Hawaii Telescope (CFHT) into the Maunakea Spectroscopic Explorer (MSE): a conceptual observatory building and facilities design

Optimal scheduling and science delivery of spectra for millions of targets in thousands of fields: the operational concept of the Maunakea spectroscopic explorer (MSE)

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