STO2 I&T at APL
June 25: Test fit of solar arrays support structure
June 29: STO2 instrument delivered to APL
July 1: Installation of instrument on telescope Gondola with telescope removed Telescope on Flotron stand and instrument ready for integration
July 1: STO2 instrument installed on telescope 1) Move telescope above Cryostat 2) Lower telescope over Cryostat and connect with struts 3) Lift assembly and move it back onto Flotron
July 1: STO2 instrument installed on telescope 4) Reconnect telescope cradle to Flotron Telescope and Cryostat on Flotron UofA team installing second cryocooler on side of Cryostat
July 2-8: Electrical checkout Gondola and telescope/cryostat assembly side-by-side connected via electrical umbilical for power and data communications checkout
July 9: STO2 Installation of telescope/cryostat assembly on gondola 1) Gondola and telescope/cryostat assembly side-by-side and aligned in preparation of telescope installation on gondola 2) Installation of telescope/cryostat assembly on gondola upper structure
July 9: STO2 Installation of telescope/cryostat assembly on gondola 3) Transfer of gondola upper structure with telescope to gondola base plate 4) Full stack completely assembled
July 10-13: Continue I&T with full stack assembled Gondola-Instrument power connections tested and fully functional Gondola-Instrument communications tested and fully functional Cooling system fully connected and pressure tested Filled with cooling fluid (Galden perfluor polyether, equivalent to Fluorinert) Tested with cooling fluid So far run for ~10 hours. No leaks detected Both cryocoolers running on the cryostat Connected to cooling loop Virtually NO residual vibrations detected 135 GHz test tone injected through main telescope and detected by test receiver Used for rough alignment of Cryostat