Abstract
The article considers the processes of deposits formation on the walls of heat exchangers. Experimental studies of the composition and structure of deposits in heat exchange equipment ...elements are carried out. The regularities of deposition are studied. The possibility of virtualization of deposits monitoring sensors is analyzed. The conclusion is made about the possibility of analytical prediction of the behavior of heat exchange equipment during the deposition and their influence on the heat transfer process. A partial replacement of experimental physical and chemical studies by simulation is proposed.
The main results of the aerodynamic resistance estimation of the catalyzing backfill of processes hydrocarbons steam reforming, and also units which implementing the process of thermochemical ...regeneration of the exhaust gases are considered. Empirical dependences of various authors are presented for determining the resistance coefficient. Expressions which is the most adequately describe the hydrodynamic picture of the ongoing process are determined. The calculated specific resistance is in the range of 25-26 kPa/m, and correlates with indicators of industrial units operated in similar hydrodynamic modes (resistance is 18-31 kPa/m).
The described system is designed to measure the field map of pulse bending magnets of accelerators. As an example, the magnet, which is an element of the particle bypass channel from the booster to ...the nuclotron of the NICA complex, which is being created at JINR, is chosen. Analyzing the capabilities of various methods in pulsed-field measurements and requirements for measurement errors in bending magnets better than 10
–3
have led to the development of a method based on the use of Hall probes. The article substantiates the developed method, describes its capabilities, and the hardware developed for conducting measurements. In the conclusions, results of measurements of pulsed bending magnets of the booster–nuclotron channel are presented and analyzed.
Using the 1.32
pb
-
1
statistics collected at the
J
/
ψ
peak with the KEDR detector at the VEPP-4M
e
+
e
-
collider, we measured the branching fractions of
J
/
ψ
meson decays to the final states 2(
π
...+
π
-
)
π
0
,
K
+
K
-
π
+
π
-
π
0
, 2(
π
+
π
-
)
and
K
+
K
-
π
+
π
-
. The results obtained for the decays
J
/
ψ
→
2(
π
+
π
-
)
π
0
,
J
/
ψ
→
K
+
K
-
π
+
π
-
π
0
contradict the measurements performed by other groups in the last century, but agree well with recent results of BABAR and BESIII collaborations.
The first stage of the linear accelerator of the Siberian Circular Photon Source (SKIF) accelerator facility has been successfully commissioned at the Budker Institute of Nuclear Physics, Siberian ...Branch, Russian Academy of Sciences (BINP). This test accelerator facility includes the radiofrequency (RF) gun, magnet system, RF accelerating structures, and diagnostic and control system elements. The aim of the work at the facility is to verify the correctness of solutions chosen for the accelerator design, as well as to get operation experience and to measure the beam parameters that will determine the successful work of the overall SKIF complex. This article describes the main subsystems of the test accelerator facility and briefly presents the first operation results concerning the beam parameters.
This paper describes the high-voltage power supply for the booster injector еlectron cooling system of the NICA collider. The ripple suppression module provides low voltage ripple and makes it ...possible to obtain Xe ion cooling times of less than 0.1 s.
Variable period undulators (VPUs) have a number of advantages over conventional undulators, but until recently they have not been used in free electron lasers (FELs). In the summer of 2021, such an ...undulator was installed on the second track of the Novosibirsk free electron laser, and lasing in the spectral range of 15–120 μm was obtained. This article describes the design of this undulator and presents the results of measurements of the radiation parameters.
A Precision High Voltage Pulse Divider Batrakov, A. M.; Vasilev, M. Yu; Kotov, E. S. ...
Instruments and experimental techniques (New York),
04/2020, Volume:
63, Issue:
2
Journal Article
Peer reviewed
—
A the high-voltage divider for pulsed signals was developed for multichannel DAQ-system of the LIA-20 linear induction accelerator. The divider satisfies a range of requirements: a range of ...operating voltages up to 30 kV, a 30 MHz bandwidth, accuracy and stability characteristics that are better than 1%, and repeatability of its parameters during mass production. An analysis of various variants of high-voltage dividers is given: passive capacitive dividers and capacitive dividers with active components, as well as resistive, resistive-capacitive, and combined dividers. The configuration selection of the divider circuit with the necessary properties is substantiated based on the analysis.
In order to achieve the design luminosity in the NICA collider, the rings are planned to be equipped with stochastic and electron cooling. The 2.5 MeV electron cooling system consists of two coolers ...that cool both ion beams simultaneously. This report deals with the design of the electron cooler and the results of testing of its magnetic elements at the Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences (BINP SB RAS).
The main results of the evaluation of the technical and economic indicators of power plants based on internal combustion engines (ICE) that are integrated into the refinery process cycle are ...considered. The statistical processing of commercial offers has been carried out, which allow to evaluate capital investments in the main power equipment. The results of the calculation for the operating conditions of the power plant on its own gas of refining showed a good investment attractiveness of the project. The calculations found that the influencing factors can be ranked in descending order of importance: the cost of electricity, the rate of discount, capital investments in the object, the fee for the power supported for the reserve from the power system. Since the generator voltage of the internal combustion engine is 0.4 kV, the economic efficiency of the proposed power plant will be higher than the considered base case and it is advisable to produce electricity supply in the factory network on the low voltage side.
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