December 2019 GHOST Update

The northern hemisphere autumn saw multiple team members travel from Australia, Chile, and Hawai’i to converge on Victoria, British Columbia, at the NRC-H labs, to witness the completion of the spectrograph final assembly, and initiate acceptance testing. The Australian team bought along their science fiber optical cable and the slit viewer subassembly to be matched with the bench spectrograph for the testing. The mechanical alignment of the optical system went well, with the use of a FARO arm and laser tracker, achieving alignment within 100 µm.  The outer enclosure final assembly was completed, and tested for temperature stability independently of the spectrograph, showing excellent results.