DEIMOS: Hatch, Lamps, Shutter Controls on Dashboard

Hatch

The DEIMOS hatch is controlled from The Dashboard GUI. It is air pressure driven and extended stationary periods can lead to pressure bleed. If a move fails, first try re-sending the move.

Lamps

DEIMOS has several lamps available for wavelength calibration. These include: Argon, Krypton, Xenon, Cadmium, Neon, Zinc, and Mercury. There is also a Quartz lamp for internal flat fielding. Please note that the Cd, Zn, and Hg lamps require 3 minutes minimum warm-up for wavelength stability. Most observers take their wavelength calibration frames and flat fields via the Slitmask Calibration Tool. By default, the exposure times in this tool are set for the 1200G grating at 7800Å central wavelength. For other setups, please check the Exposure Recipes page.

Shutter

The DEIMOS shutter is of the air pressure-driven, double-pass type. The shutter is susceptible to pressure bleeds after periods of inactivity that cause the shutter move to fail. Before your first night time exposures, we recommend you exercise the shutter a few times to ensure correct operation.
Last modified: 07/10/2020 05:20
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