Key Questions We Want to Answer:
Superconducting Microwave Oscillator (SUMO) experiment will
place in orbit a superconducting cavity-stabilized oscillator
(SCSO) system. This is a distinctive type of clock that
can be used for experiments in relativity. To date, only
atomic clocks have been used in space-based relativity missions,
however, it is known that SCSOs are extraordinarily stable
clocks with similar accuracy.
What We Already Know:
A SCSO clock is built out of a microwave cavity constructed
of a superconducting metal that operates at cryogenic temperatures.
Being based on a different timekeeping mechanism, from an
atomic clock, means that a comparison between the two can
give a fundamental understanding about changes in the universe.
Scientists have found that it is particularly useful to
compare the rates of different types of clocks as a function
of speed and gravitational pull. Placing this unique type
of clock in the microgravity of space, will provide a new
tool for probing the laws of physics at the highest possible
comparing the SUMO clock against a more standard atomic
clock, will help answer the question of whether presently
known physical laws really are indisputable, or whether
they vary for different places or velocities. This experiment
will also help to determine how gravity and other factors
have an affect on the speed of time.