Observation of Excited States in H 5 Golovkov, M. S.; Grigorenko, L. V.; Fomichev, A. S. ...
Physical review letters,
12/2004, Letnik:
93, Številka:
26
Journal Article
Status of ACCULINNA beam line Rodin, A.M.; Stepantsov, S.V.; Bogdanov, D.D. ...
Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms,
05/2003, Letnik:
204
Journal Article
Recenzirano
The separator ACCULINNA was upgraded to achieve new experimental requirements. The beam line was extended by new ion-optical elements beyond the cyclotron hall. The new arrangements yield much better ...background conditions. The intensities of
6
He
and
8
He
radioactive beams produced in fragmentation of 35 A
MeV
11
B
ions were increased up to a factor of 10. The upgraded beam line was used in experiments to study the
5
H
resonance states populated in the
t+
t reaction. A cryogenic liquid tritium target was designed and installed at the separator beam line.
Tritium target for research in exotic neutron-excess nuclei Yukhimchuk, A.A.; Perevozchikov, V.V.; Apasov, V.A. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
11/2003, Letnik:
513, Številka:
3
Journal Article
Recenzirano
A cryogenic tritium target and computer-controlled equipment providing for feeding/recovering tritium into/from the target cell and radiation monitoring in technological lines and in workrooms is ...described. The tritium target set-up showed reliable operation in experiments done with a 58.3
MeV triton beam focused on a 5
mm spot at intensity approaching 3×10
7
s
−1. The t+t elastic scattering cross-section was obtained in a wide angular range.
A vast program of the experimental investigation of muon-catalyzed dt fusion was performed on the Joint Institute for Nuclear Research phasotron. Parameters of the dt cycle were obtained in a wide ...range of the D/T mixture conditions: temperatures of 20-800 K, densities of 0.2-1.2 of the liquid hydrogen density (LHD), and tritium concentrations of 15-86%. In this paper, the results obtained are summarized.
A post-accelerator for the US rare isotope accelerator facility Ostroumov, P.N.; Kelly, M.P.; Kolomiets, A.A. ...
Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms,
05/2003, Letnik:
204
Journal Article
Recenzirano
Odprti dostop
The proposed rare isotope accelerator (RIA) facility includes a post-accelerator for rare isotopes (RIB linac) which must produce high-quality beams of radioactive ions over the full mass range, ...including uranium, at energies above the Coulomb barrier, and have high transmission and efficiency. The latter requires the RIB linac to accept at injection ions in the 1+ charge state. A concept for such a post accelerator suitable for ions up to mass 132 has been previously described
1. This paper presents a modified concept which extends the mass range to uranium. A high resolution separator for purifying beams at the isobaric level precedes the RIB linac. The mass filtering process will provide high purity beams while preserving transmission. For most cases a resolution of about
m/
Δm=20
000
is adequate at mass
A=100 to obtain a separation between isobars of mass excess difference of 5 MeV. The design for a device capable of purifying beams at the isobaric level includes calculations up to fifth order.
The RIB linac will utilize existing superconducting heavy-ion linac technology for all but a small portion of the accelerator system. The exceptional piece, a very-low-charge-state injector section needed for just the first few MV of the RIB accelerator, consists of a pre-buncher followed by several sections of cw, normally-conducting RFQ. Two stages of charge stripping are provided: helium gas stripping at energies of a few keV/u, and additional foil stripping at ∼680 keV/u for the heavier ions. In extending the mass range to uranium, however, for best efficiency the helium gas stripping must be performed at different energies for different mass ions. We present numerical simulations of the beam dynamics of a design for the complete RIB linac which provides for several stripping options and uses cost-effective solenoid focusing elements in the drift-tube linac.
Modern state of development and application of electric propulsion (EP) in Russia is analyzed in this report. The characteristics of fields of advisable EPS application are presented. The ...power-to-weight and economic effectiveness of applying EP systems of different types for solving perspective tasks, including spacecraft transportation to operating orbits, its station keeping in the orbit and in the structure of satellite constellations, operation and stabilization and taking away from the orbit after the end of the lifetime are studied in this paper.
Results of an experimental study of limestone material finely ground in water using an electro-hydropulse technique are reported. The effect of the average particle size and inequigranularity of the ...material on the grinding efficiency is considered. The theoretical aspects of fine grinding by this method and the role of cavitation are outlined.
For the experiment on the measurement of the electron antineutrino magnetic moment we suggest a new approach to the tritium source design, namely, a configuration of annular cells filled with TiT
2
...that are stacked into a hollow cylinder. Detectors are mounted in the hole inside.
We present results of the optimization of geometrical and physical parameters of the source with respect to its experimental effectiveness and safety guaranty at all stages of its lifecycle. We discuss the choice of the construction materials and specify technological issues relevant to radiation purity of the source, being of the special concern in the experiment on the electron antineutrino magnetic moment measurement.
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