Open Access
Fig. 2
ALMA Band 5 optical layout, not to scale. Optics includes two ellipsoidal mirrors, M1 and M2, and a circular corrugated horn (CH). The design provides frequency independent illumination of the secondary mirror with the edge-taper of about –11.5 dB (Whale et al. 2008).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.