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Fig. 1. Basic diagram of the experimental setup to observe the laser radiation
photon conversion into pseudo-scalar bosons
→
(axions) and the inverse process of
reconversion
→
0
using cavities:
1
— laser radiation source;
2
— semitransparent cavity
mirror;
3
— solenoids;
4
— non-transparent wall;
5
— secondary radiation detectors;
6
—
Fabri – Perot interferometers
The new experimental setups of axions generation and detection are
presented in this paper and opportunities for their laboratory testing are
analyzed.
Generation and detection of “hot” axions in the visible spectrum.
In papers [18–21] considering the evolution of stars with masses of 8. . . 12
times the mass of the Sun the conclusion was made about the course of
photon-axion conversion processes inside the stars, and estimates of the
upper constant of the photon-axion conversion were received. Moreover,
in papers [10–12, 15] an assumption was made about the possibility of
creating “hot” axion flows with the energy 2. . . 3 eV in a laboratory setting
while conducting the experiments like “Light shining through wall” (the
so-called Primakoff effect). The basic diagram for generating and detecting
axions using the Primakoff effect is shown in Figure 1. At the first stage
with the help of modern lasers of visible light that generate light quanta
(
γ
), the process of photon-axion conversion is implemented (
γ
↔
а
). The
resulting axions (
а
) penetrate the wall
4
into the second cavity. The inverse
processes (
а
→
γ
0
) of axions conversion into secondary photons (
γ
0
) can
occur in this cavity, which are registered by detector
5
.
As a result of the secondary photon detection after the reconversion
process, the probability of these processes occurrence should be estimated
as well as the efficiency of “hot” axions photoproduction in the laboratory.
According to the selection rules, the processes of photon-axion
conversion can occur only with the imposition of a constant magnetic
field in the area of laser radiation scattering, the induction of this magnetic
field being perpendicular to the direction of the exciting radiation beam. It
causes the direct processes of photon-axion transformation. In the absence
of the external magnetic field, only three-particle conversion processes are
allowed, their probability of occurrence being low.
As it has become clear from the experiments made [10–12, 15], the
observed signal of the secondary radiation resulting from the reconversion
process has turned out to be extremely small, and at this stage of the
experiments it is below the threshold of sensitivity of the modern radiation
ISSN 1812-3368. Herald of the BMSTU. Series “Natural Sciences”. 2014. No. 6
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