Resonance Spectra of MKIDs Obtained with Frequency Sweeping Scheme

25 Jul 2019, 17:45
1h 15m
Piazza Città di Lombardia (Milano)

Piazza Città di Lombardia

Milano

Piazza Città di Lombardia, 1, 20124 Milano MI
Poster Detector readout, signal processing, and related technologies Poster session

Speaker

Dr Makoto Nagai (National Astronomical Observatory of Japan)

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.

Less than 5 years of experience since completion of Ph.D N
Student (Ph.D., M.Sc. or B.Sc.) N

Primary authors

Dr Makoto Nagai (National Astronomical Observatory of Japan) Mr Yosuke Murayama Dr Tom Nitta (University of Tsukuba) Dr Hitoshi Kiuchi Dr Yutaro Sekimoto (Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency) Hiroshi Matsuo (National Astronomical Observatory of Japan) Prof. Wenlei Shan (National Astronomical Observatory of Japan) masato naruse (saitama university) Dr Takashi Noguchi

Presentation Materials