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Fig. 7. Basic diagram of a microwave radiation detector for axion-photon conversion
using the non-stationary Josephson effect (
а
), basic diagrams for observing the
conversion of axions into microwave radiation in a cavity (
b
) containig a photon
crystal with large diameter globules (
d
):
1
— screen;
2
— magnets;
3
— Josephson junction;
4
,
5
— current and voltage meters;
6
—
signal analyzer ;
7
— computer;
8
,
10
— niobium mirrors;
9
— magnets;
11
— teflon lens;
12
— microwave radiation detector
the thermal radiation. The diagram in Figure 7,
b
shows an unfilled cavity.
Using teflon lens
11
, the microwave radiation is directed to a highly
sensitive detector.
The cavity filling up with photon crystal or some suitable metamaterial
(Fig. 7,
c
), having a spectral position of the stop zone controlled by an
external magnetic field, with this stop-zone located in the microwave
spectral region, will make it possible to slow down the flow of microwave
photons arising in the cavity and, consequently, to raise the spectral
intensity of microwave radiation.
The energy density of the dark matter in the near-Earth space is
ρ
≈
10
−
10
J/сm
3
. Thus, the energy of the dark matter focused in the
volume
V
= 1
m
3
, is
10
−
4
J. If we proceed from the hypothesis that
the clouds of the dark matter in the near-Earth space consist mainly of
16
ISSN 1812-3368. Herald of the BMSTU. Series “Natural Sciences”. 2014. No. 6