  Series of experiments were carried out to check the prediction concerning the
possibility to generate gravitational field when charged massive particles
decelerated in the in substance. As a source of the charged particles was used
the accelerator of the electrons. The narrow bundle relativistic electrons
(average power of a bundle 450 W, electrons energy about 30 MeV) were directed
on a stopping target made from tungsten where electrons deceleration happened.
  The measurements have shown emerging statistically of authentic deviation of
a rotating pendulum, one of which massive cargoes was near to the stopping
target, in the moment when the bundle of relativistic electrons decelerated in
the stopping target. Also was fixed changing of direction of the pendulum
rotation when stopping target was shifted from one end of a pendulum to
another. The magnitude of force that calls a deviation of the pendulum has
upper limit 0,000001 N.
