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DEUTERONS BEAM PARAMETERS MEASUREMENTS OF THE NUCLOTRON
K.Husak 1 , M.Artushenko 2 , I.Zhuk 1 , V.Voronko 2 , M.Kadykov 3 , A.Patapenka 1 , A.Safronava 1 ,
V.Sotnikov 2 , S. Tyutyunnikov 3 , V.Chilap 4 , A.Chinenov 4
1
Joint Institute of Power and Nuclear Research-Sosny Minsk, Republic of Belarus
2
National Scientific Center Kharkov Institute of Physics and Technology Kharkov
Republic of Ukraine
3
Joint Institute for Nuclear Research, Dubna, Russian Federation
4
CPTP “Atomenergomash”, Moscow, Russian Federation
The experimental subcritical setup “QUINTA” irradiation by deuteron beams of energies 1, 4,
6 and 8 GeV is described in the paper. The experiments were done in Laboratory of High
Energy Physics (JINR, Dubna, Russian Federation). The beams were produced by
superconducting, strong focusing synchrotron named Nuclotron.
The experimental subcritical setup contains five sections. Each section is composed of
uranium rods arranged in the form of hexagonal (triangular) lattice with pitch size of 3.6 cm.
Whole setup contains total of 512.56 kg of natural uranium.
The axis of the setup was aligned with beam axis with the help of the adjustable stand under
the whole setup. The alignment of the beam center with the center of the setup was achieved
by examining Polaroid films placed in front of the target and exposed to a couple deuteron
pulses prior to the installation of the sample plates and the start of the main irradiation.
Deuteron's beams shape and position on the target were obtained from track density
distribution on the irradiated track detectors. Sensors made of nat Pb foils and artificial mica as
solid state nuclear track detectors (SSNTD) were used for registration Nat Pb(d,f) reaction. The
coordinates of the deuteron beam centre and full width at half maximum of the distributions
were obtained from the Gaussian fits of the deuteron beam in X- and Y-axis. The fraction of
the beam striking the fissionable material and number of deuterons gone out of the setup were
calculated.
The results obtaining during the experiments were used to determine beam position on the
target, beam parameters (beam shape and beam size).
It is shown that more precise primary alignment of the target along the beam axis is needed.
Or, if it is not possible, the central part of the setup (uranium rods, d=3,6 cm) should be
replaced by a lead target with bigger diameter, in order to avoid beam losses in the gaps
between the rods.
The simulations of the experiment were done with a FLUKA2011 Monte-Carlo code.
Comparison experimental results and simulation is also presented.
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