Speaker
Description
We are developing a detector array for astronomical observation in
100-GHz band using Microwave Kinetic Inductance Detector (MKID)
and a readout system for the array with frequency sweeping scheme,
which uses a frequency sweeping probe signal instead of a
fixed-frequency probe signal. This scheme enables us to obtain
resonance spectra of MKIDs in an array simultaneously and to derive
the resonance frequencies related to the power of incoming radiation.
It has the advantage that the derived resonance frequencies are not
affected by changes of gain and delay in the transmission line. The
resonance profile measured, however, can be distorted by frequency
sweeping, and it is necessary to evaluate the effect of frequency
sweeping on resonance spectrum. We made measurements using the scheme
with several frequency-sweep velocities and checked dependence of the
resonance frequency and the Q-factor on it. A slow frequency sweep
causes only small difference of resonance spectrum from an ideal
profile, and is suitable for astronomical application.
| Student (Ph.D., M.Sc. or B.Sc.) | N |
|---|---|
| Less than 5 years of experience since completion of Ph.D | N |
