30 research outputs found
Reflection of a Rayleigh wave from the edge of a wedge in oblique incidence
The reflection of a Rayleigh wave from the edge of a sharp elastic wedge in oblique incidence is aaalyzed. It is
shown that the nature of the angular dependence of the modulus of the reflection coeffrcient is strongly
affected by the phase shift of the symmetric field mode associated with reflection from a caustic. The results
are tested experimentally
Directivity patterns of a spark source of acoustic waves in a solid
The direcrional characteristics of a spark source of acoustic waves in a solid are studied experimentally' The
angular dependence of the ampiituJes of longitudinal and shear waves and of Rayleigh surface waves is
inuestigated for two principal discharge geometries. A qualitative interpretation of the observed dependences
is given
First results of dust injection in T-10 plasma
First results of T-10 injection experiments of the carbon dust particles with 2-10 mm diameter and 40-300 m/s velocity are presented. Different scenarios of the dust injection were tested. The dust particles ablation was studied. An approach for determination of a dust particle penetration length was developed. Measured penetration depths (3-7 cm) are compared with the simulation by the ablation model. The mm range of the separate dust particle diameters derived from the ablation data was close to sizes of the dust injected assuming that an acceleration of the separate particle is similar to the large carbon pellet in the pellet injector.ΠΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½ΠΎ ΠΏΠ΅ΡΡΡ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠΈ Π΅ΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΡΠ² ΠΏΠΎ ΡΠ½ΠΆΠ΅ΠΊΡΡΡ Π²ΡΠ³Π»Π΅ΡΠ΅Π²ΠΈΡ
ΠΏΠΈΠ»ΠΎΠ²ΠΈΡ
ΡΠ°ΡΡΠΎΠΊ Π΄ΡΠ°ΠΌΠ΅ΡΡΠΎΠΌ 2-10 ΠΌΠΊΠΌ Π·Ρ ΡΠ²ΠΈΠ΄ΠΊΠΎΡΡΡΠΌΠΈ 40-300 ΠΌ/Ρ Ρ Π’-10. ΠΡΠΎΡΠ΅ΡΡΠΎΠ²Π°Π½ΠΎ ΡΡΠ·Π½Ρ ΡΡΠ΅Π½Π°ΡΡΡ ΡΠ½ΠΆΠ΅ΠΊΡΡΡ ΠΏΠΈΠ»Ρ. ΠΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½ΠΎ Π²ΠΈΠΏΠ°Ρ ΠΏΠΈΠ»ΠΎΠ²ΠΈΡ
ΡΠ°ΡΡΠΎΠΊ. Π ΠΎΠ·ΡΠΎΠ±Π»Π΅Π½ΠΎ ΠΏΡΠΈΠ±Π»ΠΈΠ·Π½Ρ ΠΌΠ΅ΡΠΎΠ΄ΠΈΠΊΡ Π²ΠΈΠ·Π½Π°ΡΠ΅Π½Π½Ρ Π³Π»ΠΈΠ±ΠΈΠ½ΠΈ ΠΏΡΠΎΠ½ΠΈΠΊΠ½Π΅Π½Π½Ρ ΠΏΠΈΠ»ΠΎΠ²ΠΈΡ
ΡΠ°ΡΡΠΎΠΊ. ΠΠ±ΠΌΡΡΡΠ½Ρ Π³Π»ΠΈΠ±ΠΈΠ½ΠΈ ΠΏΡΠΎΠ½ΠΈΠΊΠ½Π΅Π½Π½Ρ (3-7 ΡΠΌ) ΠΏΠΎΡΡΠ²Π½ΡΠ²Π°Π»ΠΈΡΡ Π· ΡΠΎΠ·ΡΠ°Ρ
ΡΠ½ΠΊΠ°ΠΌΠΈ ΠΏΠΎ ΠΌΠΎΠ΄Π΅Π»Ρ Π²ΠΈΠΏΠ°ΡΡ. ΠΡΡΠ½Π΅Π½Ρ ΠΌΡΠΊΡΠΎΠ½Π½Ρ Π΄ΡΠ°ΠΌΠ΅ΡΡΠΈ ΡΠ°ΡΡΠΎΠΊ, ΠΎΡΡΠΈΠΌΠ°Π½Ρ Π· Π΄Π°Π½ΠΈΡ
ΠΏΠΎ Π²ΠΈΠΏΠ°ΡΡ, Ρ Π±Π»ΠΈΠ·ΡΠΊΠΈΠΌΠΈ Π΄ΠΎ ΡΠΎΠ·ΠΌΡΡΡΠ² ΡΠ½ΠΆΠ΅ΠΊΡΠΎΠ²Π°Π½ΠΎΠ³ΠΎ ΠΏΠΈΠ»Ρ, Ρ ΠΏΡΠΈΠΏΡΡΠ΅Π½Π½Ρ ΡΠΎΠ³ΠΎ, ΡΠΎ ΠΎΠΊΡΠ΅ΠΌΡ ΡΠ°ΡΡΠΊΠΈ ΠΏΡΠΈΡΠΊΠΎΡΡΡΡΡΡΡ ΡΠ°ΠΊ ΡΠ°ΠΌΠΎ, ΡΠΊ Ρ ΠΏΡΠΈ ΡΠ½ΠΆΠ΅ΠΊΡΡΡ Π²Π΅Π»ΠΈΠΊΠΈΡ
ΠΏΠ΅Π»Π΅ΡΡΠ².ΠΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Ρ ΠΏΠ΅ΡΠ²ΡΠ΅ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠΎΠ² ΠΏΠΎ ΠΈΠ½ΠΆΠ΅ΠΊΡΠΈΠΈ ΡΠ³Π»Π΅ΡΠΎΠ΄Π½ΡΡ
ΠΏΡΠ»Π΅Π²ΡΡ
ΡΠ°ΡΡΠΈΡ Π΄ΠΈΠ°ΠΌΠ΅ΡΡΠΎΠΌ 2-10 ΠΌΠΊΠΌ ΡΠΎ ΡΠΊΠΎΡΠΎΡΡΡΠΌΠΈ 40-300 ΠΌ/Ρ Π² Π’-10. ΠΡΠΎΡΠ΅ΡΡΠΈΡΠΎΠ²Π°Π½Ρ ΡΠ°Π·Π»ΠΈΡΠ½ΡΠ΅ ΡΡΠ΅Π½Π°ΡΠΈΠΈ ΠΈΠ½ΠΆΠ΅ΠΊΡΠΈΠΈ ΠΏΡΠ»ΠΈ. ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΎ ΠΈΡΠΏΠ°ΡΠ΅Π½ΠΈΠ΅ ΠΏΡΠ»Π΅Π²ΡΡ
ΡΠ°ΡΡΠΈΡ. Π Π°Π·ΡΠ°Π±ΠΎΡΠ°Π½Π° ΠΏΡΠΈΠ±Π»ΠΈΠ·ΠΈΡΠ΅Π»ΡΠ½Π°Ρ ΠΌΠ΅ΡΠΎΠ΄ΠΈΠΊΠ° ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ Π³Π»ΡΠ±ΠΈΠ½Ρ ΠΏΡΠΎΠ½ΠΈΠΊΠ½ΠΎΠ²Π΅Π½ΠΈΡ ΠΏΡΠ»Π΅Π²ΡΡ
ΡΠ°ΡΡΠΈΡ. ΠΠ·ΠΌΠ΅ΡΠ΅Π½Π½ΡΠ΅ Π³Π»ΡΠ±ΠΈΠ½Ρ ΠΏΡΠΎΠ½ΠΈΠΊΠ½ΠΎΠ²Π΅Π½ΠΈΡ (3-7 ΡΠΌ) ΡΡΠ°Π²Π½ΠΈΠ²Π°Π»ΠΈΡΡ Ρ ΡΠ°ΡΡΠ΅ΡΠ°ΠΌΠΈ ΠΏΠΎ ΠΌΠΎΠ΄Π΅Π»ΠΈ ΠΈΡΠΏΠ°ΡΠ΅Π½ΠΈΡ. ΠΡΠ΅Π½Π΅Π½Π½ΡΠ΅ ΠΌΠΈΠΊΡΠΎΠ½Π½ΡΠ΅ Π΄ΠΈΠ°ΠΌΠ΅ΡΡΡ ΡΠ°ΡΡΠΈΡ, ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΡΠ΅ ΠΈΠ· Π΄Π°Π½Π½ΡΡ
ΠΏΠΎ ΠΈΡΠΏΠ°ΡΠ΅Π½ΠΈΡ, Π±Π»ΠΈΠ·ΠΊΠΈ ΠΊ ΡΠ°Π·ΠΌΠ΅ΡΠ°ΠΌ ΠΈΠ½ΠΆΠ΅ΠΊΡΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠΉ ΠΏΡΠ»ΠΈ, Π² ΠΏΡΠ΅Π΄ΠΏΠΎΠ»ΠΎΠΆΠ΅Π½ΠΈΠΈ ΡΠΎΠ³ΠΎ, ΡΡΠΎ ΠΎΡΠ΄Π΅Π»ΡΠ½ΡΠ΅ ΡΠ°ΡΡΠΈΡΡ ΡΡΠΊΠΎΡΡΡΡΡΡ ΡΠ°ΠΊ ΠΆΠ΅, ΠΊΠ°ΠΊ ΠΈ ΠΏΡΠΈ ΠΈΠ½ΠΆΠ΅ΠΊΡΠΈΠΈ ΠΊΡΡΠΏΠ½ΡΡ
ΠΏΠ΅Π»Π»Π΅ΡΠΎΠ²
Elliptic flow in Pb+Pb collisions at sqrt{s_{NN}} = 2.76 TeV: hybrid model assessment of the first data
We analyze the elliptic flow parameter v_2 in Pb+Pb collisions at
sqrt{s_{NN}} = 2.76 TeV and in Au+Au collisions at sqrt{s_{NN}} =200 GeV using
a hybrid model in which the evolution of the quark gluon plasma is described by
ideal hydrodynamics with a state-of-the-art lattice QCD equation of state, and
the subsequent hadronic stage by a hadron cascade model. For initial
conditions, we employ Monte-Carlo versions of the Glauber and the
Kharzeev-Levin-Nardi models and compare results with each other. We demonstrate
that the differential elliptic flow v_2(p_T) hardly changes when the collision
energy increases, whereas the integrated v_2 increases due to the enhancement
of mean transverse momentum. The amount of increase of both v_2 and mean p_T
depends significantly on the model of initialization.Comment: 5 pages, 5 figure
Comissioning of the linear accelerator-injector at the TNK facility
The industrial storage facility has been developed and manufactured at the Budker INP SB RAS. It contains an
80 MeV electron linear accelerator-injector and two electron storage rings: the lesser 450 MeV booster ring and the
main 2.5 GeV storage ring. In 2002, the work on the accelerator assembling was begun. On December, 25 this year
the accelerator was started up, and the current at the linear accelerator output was obtained. The linear accelerator
schematic together with a description of the 6 meter long accelerating DAW structure which operates at 2.8 GHz,
are presented in the paper. The first results of the accelerator start-up are as follows: the accelerated electron current
of ~50 mA with the energy of ~55...60 MeV.Π’Π΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΡΡΠ½ΠΈΠΉ Π½Π°ΠΊΠΎΠΏΠΈΡΡΠ²Π°Π»ΡΠ½ΠΈΠΉ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡ Π±ΡΠ² ΡΠΏΡΠΎΠ΅ΠΊΡΠΎΠ²Π°Π½ΠΈΠΉ Ρ Π²ΠΈΠ³ΠΎΡΠΎΠ²Π»Π΅Π½ΠΈΠΉ Ρ ΠΠ―Π€ ΡΠΌ. Π.Π. ΠΡΠ΄ΠΊΠ΅ΡΠ° Π‘Π
Π ΠΠ. ΠΡΠ½ ΠΌΡΡΡΠΈΡΡ Ρ ΡΠΎΠ±Ρ ΡΠ½ΠΆΠ΅ΠΊΡΠΎΡβΠ»ΡΠ½ΡΠΉΠ½ΠΈΠΉ ΠΏΡΠΈΡΠΊΠΎΡΡΠ²Π°Ρ Π΅Π»Π΅ΠΊΡΡΠΎΠ½ΡΠ² Π· Π΅Π½Π΅ΡΠ³ΡΡΡ Π΄ΠΎ 80 ΠΠ΅Π Ρ Π΄Π²Π°
Π½Π°ΠΊΠΎΠΏΠΈΡΡΠ²Π°ΡΡ Π΅Π»Π΅ΠΊΡΡΠΎΠ½ΡΠ²: ΠΌΠ°Π»ΠΈΠΉ Π½Π°ΠΊΠΎΠΏΠΈΡΡΠ²Π°ΡβΠ±ΡΡΡΠ΅Ρ Π½Π° Π΅Π½Π΅ΡΠ³ΡΡ 450 ΠΠ΅Π Ρ ΠΎΡΠ½ΠΎΠ²Π½ΠΈΠΉ Π½Π°ΠΊΠΎΠΏΠΈΡΡΠ²Π°Ρ Π½Π°
Π΅Π½Π΅ΡΠ³ΡΡ 2.5 ΠΠ΅Π. ΠΡΠΈΠ²ΠΎΠ΄ΡΡΡΡΡ ΡΡΠ½ΠΊΡΡΠΎΠ½Π°Π»ΡΠ½Π° ΡΡ
Π΅ΠΌΠ° Π»ΡΠ½ΡΠΉΠ½ΠΎΠ³ΠΎ ΠΏΡΠΈΡΠΊΠΎΡΡΠ²Π°ΡΠ° ΠΉ ΠΎΠΏΠΈΡ ΠΊΠΎΠ½ΡΡΡΡΠΊΡΡΡ
ΠΏΡΠΈΡΠΊΠΎΡΡΡΡΠΎΡ ΡΡΡΡΠΊΡΡΡΠΈ ΡΠ· ΡΠ°ΠΉΠ±Π°ΠΌΠΈ Ρ Π΄ΡΠ°ΡΡΠ°Π³ΠΌΠ°ΠΌΠΈ Π΄ΠΎΠ²ΠΆΠΈΠ½ΠΎΡ 6 ΠΌ, ΡΠΎ ΠΏΡΠ°ΡΡΡ Π½Π° ΡΠ°ΡΡΠΎΡΡ 2.8 ΠΠΡ.ΠΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½ΠΎ ΠΏΠ΅ΡΡΡ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠΈ Π·Π°ΠΏΡΡΠΊΡ ΠΏΡΠΈΡΠΊΠΎΡΡΠ²Π°ΡΠ°: ΠΎΡΡΠΈΠΌΠ°Π½ΠΈΠΉ ΠΏΡΠΈΡΠΊΠΎΡΠ΅Π½ΠΈΠΉ ΡΡΡΡΠΌ Π΅Π»Π΅ΠΊΡΡΠΎΠ½ΡΠ² ~50 ΠΌΠ Π·
Π΅Π½Π΅ΡΠ³ΡΡΡ ~(55...60) ΠΠ΅Π.Π’Π΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΠΉ Π½Π°ΠΊΠΎΠΏΠΈΡΠ΅Π»ΡΠ½ΡΠΉ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡ Π±ΡΠ» ΡΠΏΡΠΎΠ΅ΠΊΡΠΈΡΠΎΠ²Π°Π½ ΠΈ ΠΈΠ·Π³ΠΎΡΠΎΠ²Π»Π΅Π½ Π² ΠΠ―Π€ ΠΈΠΌ. Π.Π. ΠΡΠ΄ΠΊΠ΅ΡΠ° Π‘Π
Π ΠΠ. ΠΠ½ Π²ΠΊΠ»ΡΡΠ°Π΅Ρ Π² ΡΠ΅Π±Ρ ΠΈΠ½ΠΆΠ΅ΠΊΡΠΎΡβΠ»ΠΈΠ½Π΅ΠΉΠ½ΡΠΉ ΡΡΠΊΠΎΡΠΈΡΠ΅Π»Ρ ΡΠ»Π΅ΠΊΡΡΠΎΠ½ΠΎΠ² Ρ ΡΠ½Π΅ΡΠ³ΠΈΠ΅ΠΉ Π΄ΠΎ 80 ΠΡΠ ΠΈ Π΄Π²Π° Π½Π°ΠΊΠΎΠΏΠΈΡΠ΅Π»Ρ
ΡΠ»Π΅ΠΊΡΡΠΎΠ½ΠΎΠ²: ΠΌΠ°Π»ΡΠΉ Π½Π°ΠΊΠΎΠΏΠΈΡΠ΅Π»ΡβΠ±ΡΡΡΠ΅Ρ Π½Π° ΡΠ½Π΅ΡΠ³ΠΈΡ 450 ΠΡΠ ΠΈ ΠΎΡΠ½ΠΎΠ²Π½ΠΎΠΉ Π½Π°ΠΊΠΎΠΏΠΈΡΠ΅Π»Ρ Π½Π° ΡΠ½Π΅ΡΠ³ΠΈΡ 2.5 ΠΡΠ. ΠΡΠΈΠ²ΠΎΠ΄ΡΡΡΡ ΡΡΠ½ΠΊΡΠΈΠΎΠ½Π°Π»ΡΠ½Π°Ρ ΡΡ
Π΅ΠΌΠ° Π»ΠΈΠ½Π΅ΠΉΠ½ΠΎΠ³ΠΎ ΡΡΠΊΠΎΡΠΈΡΠ΅Π»Ρ ΠΈ ΠΎΠΏΠΈΡΠ°Π½ΠΈΠ΅ ΠΊΠΎΠ½ΡΡΡΡΠΊΡΠΈΠΈ ΡΡΠΊΠΎΡΡΡΡΠ΅ΠΉ ΡΡΡΡΠΊΡΡΡΡ Ρ
ΡΠ°ΠΉΠ±Π°ΠΌΠΈ ΠΈ Π΄ΠΈΠ°ΡΡΠ°Π³ΠΌΠ°ΠΌΠΈ Π΄Π»ΠΈΠ½ΠΎΠΉ 6 ΠΌΠ΅ΡΡΠΎΠ², ΡΠ°Π±ΠΎΡΠ°ΡΡΠ΅ΠΉ Π½Π° ΡΠ°ΡΡΠΎΡΠ΅ 2.8 ΠΠΡ. ΠΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Ρ ΠΏΠ΅ΡΠ²ΡΠ΅ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ
Π·Π°ΠΏΡΡΠΊΠ° ΡΡΠΊΠΎΡΠΈΡΠ΅Π»Ρ: ΠΏΠΎΠ»ΡΡΠ΅Π½ ΡΡΠΊΠΎΡΠ΅Π½Π½ΡΠΉ ΡΠΎΠΊ ΡΠ»Π΅ΠΊΡΡΠΎΠ½ΠΎΠ² ~50 ΠΌA Ρ ΡΠ½Π΅ΡΠ³ΠΈΠ΅ΠΉ ~(55...60) ΠΡΠ
Nucleosomes in gene regulation: theoretical approaches
This work reviews current theoretical approaches of biophysics and
bioinformatics for the description of nucleosome arrangements in chromatin and
transcription factor binding to nucleosomal organized DNA. The role of
nucleosomes in gene regulation is discussed from molecular-mechanistic and
biological point of view. In addition to classical problems of this field,
actual questions of epigenetic regulation are discussed. The authors selected
for discussion what seem to be the most interesting concepts and hypotheses.
Mathematical approaches are described in a simplified language to attract
attention to the most important directions of this field
Efficient excitation of Rayleigh waves by a strong shock wave initiated by a spark in air
Efficient excitation of Rayleigh waves by a strong shock wave initiated by a spark in ai
Waveforms of acoustic pulses generated in a solid by a spark discharge
The waveforms of longitudinal and Rayleigh wave pulses generated in a glass sample by a spark discharge are
measured