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Classical accelerometers K Douch et al, Meas. Sci. Technol. 25 (2014) 105902 Electrostatic Sensor Known Readout Main potential problems: “Spring” aging/noise
Release mechanism
Low frequency noise (1/f ) Main benefits: Relatively simple
Cheap<br>
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Quantum accelerometers<br>
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Quantum accelerometers: How? DF Mach-Zehnder Interferometer<br>
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Quantum accelerometers: How? DF Mach-Zehnder Interferometer de Broglie de Broglie, Ann. Phys. 3, 32 (1925)
Electron diffraction by Davisson and Germer,
Phys. Rev. 30, 705 (1927)<br>
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Momentum Conservation Two level atom |g |e |g |e<br>
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0 T 2T Detection time Preparation space Atom Interferometer<br>
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Atom Interferometer space Beam Splitter Beam Splitter Mirror<br>
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Atom Interferometer 0 T 2T<br>
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Atom Interferometer 0 T 2T<br>
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Measurement Example A. Peters, et al. Phil. Trans. R. Soc. Lond. A 355, 2223 (1997).<br>
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A. Peters, et al. Phil. Trans. R. Soc. Lond. A 355, 2223 (1997). 1mGal=10-8 m/s2~10-9g Measurement Example<br>
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CAITDM Cold Atom Interferometric Thermosphere Drag Measurement Proposed mission Image © STFC RAL Space Siemes, C., Maddox, S., Carraz, O. et al. CEAS Space J 14, 637–653 (2022). https://doi.org/10.1007/s12567-021-00412-1 NOAA Space Weather Prediction Center https://www.swpc.noaa.gov/products/solar-cycle-progression<br>
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CAITDM Cold Atom Interferometric Thermosphere Drag Measurement Image © STFC RAL Space Aim:
Raise the TRL of critical subsystems towards an AI accelerometer instrument Means:
Build a representative breadboard of the instrument and perform env. tests of selected subsystems Siemes, C., Maddox, S., Carraz, O. et al. CEAS Space J 14, 637–653 (2022). https://doi.org/10.1007/s12567-021-00412-1 NOAA Space Weather Prediction Center https://www.swpc.noaa.gov/products/solar-cycle-progression Proposed mission<br>
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CAITDM Cold Atom Interferometric Thermosphere Drag Measurement Image © STFC RAL Space Siemes, C., Maddox, S., Carraz, O. et al. CEAS Space J 14, 637–653 (2022). https://doi.org/10.1007/s12567-021-00412-1 NOAA Space Weather Prediction Center https://www.swpc.noaa.gov/products/solar-cycle-progression e.g. Forbes, J. M., G. Lu, S. Bruinsma, S. Nerem, and X. Zhang (2005), J. Geophys. Res., 110, A12S27, https://doi.org/10.1029/2004JA010856 Proposed mission<br>
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CAITDM Cold Atom Interferometric Thermosphere Drag Measurement Image © STFC RAL Space Siemes, C., Maddox, S., Carraz, O. et al. CEAS Space J 14, 637–653 (2022). https://doi.org/10.1007/s12567-021-00412-1 NOAA Space Weather Prediction Center https://www.swpc.noaa.gov/products/solar-cycle-progression e.g. Forbes, J. M., G. Lu, S. Bruinsma, S. Nerem, and X. Zhang (2005), J. Geophys. Res., 110, A12S27, https://doi.org/10.1029/2004JA010856 Proposed mission<br>
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Overall Instrument Concept Magnetic Shield Coils Telescopes Vacuum Chamber Bus +Avionics Lasers + PL Electronics Physics Package Ferreras, J., Spencer, J., Salter, M., Valenzuela, T., et al. Cold Atom Space Payload Atmospheric Drag Mission (CASPA-ADM). 36th Annual Small Satellite Conference, SSC22-P2-18, https://digitalcommons.usu.edu/smallsat/2022/all2022/258/ 20cm x 20cm x 20cm 16 U CubeSat<br>
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Thank you @RAL_Space_STFC ralspace.stfc.ac.uk RAL Space RAL Space<br>
