The MegaMapper: A Stage-5 Spectroscopic Instrument Concept for the Study of Inflation and Dark Energy
Abstract
In this white paper, we present the MegaMapper concept. The MegaMapper is a proposed ground-based experiment to measure Inflation parameters and Dark Energy from galaxy redshifts at $2<z<5$. In order to achieve path-breaking results with a mid-scale investment, the MegaMapper combines existing technologies for critical path elements and pushes innovative development in other design areas. To this aim, we envision a 6.5-m Magellan-like telescope, with a newly designed wide field, coupled with DESI spectrographs, and small-pitch robots to achieve multiplexing of at least 26,000. This will match the expected achievable target density in the redshift range of interest and provide a 10x capability over the existing state-of the art, without a 10x increase in project budget.
- Publication:
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arXiv e-prints
- Pub Date:
- September 2022
- DOI:
- 10.48550/arXiv.2209.04322
- arXiv:
- arXiv:2209.04322
- Bibcode:
- 2022arXiv220904322S
- Keywords:
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- Astrophysics - Instrumentation and Methods for Astrophysics;
- High Energy Physics - Experiment
- E-Print:
- Contributed White Paper to Snowmass 2021. arXiv admin note: substantial text overlap with arXiv:1907.11171. text overlap with arXiv:2209.03585
