results obtained with the help of SPECTRE equipment one can find in our publications.
Here I want to recall my impressions from the ARAKS experiment and my
participation in it. I started my work at IZMIRAN (Institute
of Terrestrial Magnetism, Ionosphere
and Radiowave Propagation) immediately after
graduation from the Physical Faculty of the Lomonosov Moscow State
University. I graduated
from Radiophysical Department but my specialty was the science, radiophysics,
not device engineering. So I was very surprised when I was requested to start
the design of the wideband receiver. For the few years I converted into the
radio engineer. I looked for transistors, studied the requirements for
electronic elements to use them in space, thought about how to register the
wideband signal. It is difficult to imagine how it was in the beginning of 70-th. No computers, no digital processing, no flash memory,
everything is analogous technique. We decided to use the video tape recorder.
The Japanese JVC-871P was selected, and we received enormous money (for this
time) as a support to acquire this recorder (near 10,000 USD). The main problem
for me was the fighting with the receiver excitation. Actually, the receiver
was a wideband (0.1 – 5 MHz) amplifier. I overcome the problem few days before
device delivering to flight tests. Our French partners did not believe in our
idea at all, and they made everything possible to limit our participation. During
the first half of the first rocket launch our equipment was switched off to let
to work only the French radiospectrometer, and after that it was active only
every second sequence of the electron gun for the same reason. One can see this
in the first figure where the dynamic wideband spectra are presented.
Fig. 1 Dynamic HF spectra registered
by the wideband SPECTRE equipment during the ARAKS NORD launch 26 of January
personal victory was the second flight when the French HF device failed, and
only my device gave results for HF spectra stimulated by electron gun. These
results are presented in the Figure 2. This project was a great and very
important experience for me, regardless I was not
permitted to go to the Kerguelen
Island. I never been
there, but our results were never repeated in active experiments, and our
approach was revolutionary for the wave-particle interaction studies.
It’s a pity
that the results were not widely known due to changes in the IZMIRAN
directorship and explicit loss of interest of our French partners to continue
the ARAKS results exploration.
Fig. 2 Dynamic HF spectra registered
by the wideband SPECTRE equipment during the ARAKS EAST launch 15 of February