Feger, TobiasSchwab, C.Kuo Tiong, B. C.Ireland, MichaelRains, AdamCoutts, David William2024-07-242024-07-24June 10-1497815106195790277-786Xhttps://hdl.handle.net/1885/733714168RHEA is a compact high-resolution single-mode spectrograph that can easily be produced in larger quantities as budgets allow. The instrument will be housed in a temperature-stabilized vacuum chamber which is surrounded by several layers of thermal shielding. The optical design employs cost-effective commercially available compo- nents, a cooled CMOS detector, and a double-fiber input which permits simultaneous wavelength calibration.This research was supported partially by the Australian Government through the Australian Research Council’s Discovery Project funding scheme DE160101585.application/pdfen-AU© 2018 SPIE201810.1117/12.23131702023-10-22