FLASH+ is a dual-frequency MPIfR principal investigator (PI) receiver, operating simultaneously in the 345 GHz and the 460 GHz atmospheric windows. It was decommissioned in 2020 to be replaced by the next generation of heterodyne instruments.

For more detailed information, please consult the FLASH+ webpage at MPIfR Bonn. A few fact sheets is compiled by ESO in the FLASH+ dedicated page.
Additional information about the optical and electrical layout of the receiver is available on a previous version of the FLASH webpage.

Technical. paper about FLASH+

Klein T.; Ciechanowicz M.; Leinz C.; Heyminck S.; Güsten R.; Kasemann C.; Wunsch J.; Maier D.; Sekimoto Y. FLASH+ A dual-channel wide-band spectrometer for APEX, IEEE Transactions on THz Science and Technology, Vol 4, Issue 5, Sep 2014.

Observing time estimators