At present, combined UHV pumps, i.e., pumps based on nonevaporable getters and sputter ion pumps in one housing, are widely applied in vacuum systems of charged particle accelerators. This type of pump will be used in the 4+ generation synchrotron at the Siberian Ring Photon Source (SKIF) shared resource center (facility). A prototype of the combined pump with a hydrogen pumping speed of 1000 L/s has been manufactured and tested at the Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences (BINP SB RAS). This paper describes the design of the pump and testing results for various gases.

The paper considers the interrelation, distinctions and features of algorithms for processing the results of marine scalar gravimetric survey, synthesized within the Kalman and Wiener approaches. Their advantages and disadvantages in solving the problems of filtering and smoothing are analyzed. The authors present and compare the results obtained with various recursive filters in simulation and real data processing. The consistency of filters and the possibility to create their adaptive versions suggesting, among other things, the identification of signal and noise models, are discussed.

In Novosibirsk, the Synchrotron Radiation Facility Siberian Circular Photon Source (SRF SKIF) 4+ generation synchrotron radiation source is currently under construction. Its specific feature is a low emittance at a high beam current. Collective effects in the dynamics of an intense beam may lead to various instabilities and, correspondingly, to worsen the quality of a beam or its complete loss. To suppress the undesirable effects, it is necessary to analyze the interaction of a beam with different vacuum chamber elements to minimize their impedances. This paper presents the calculation of longitudinal and transversal impedances for the main elements of the vacuum chamber of the SKIF storage ring, such as the fundamental harmonic resonator, flange connection, compensator, beam position monitor, and pumping port. The total coherent losses, kick-factor, and total effective impedance are calculated, and the contributions from each type of elements to the total characteristics are estimated.

The magnetron sputtering is used for obtaining getter films for synchrotron radiation source Siberian Circular Photon Source. Getter thin films are to be used inside straight sections of the storage ring. The main problem of this technique is overheating cathode. Storage ring has narrow aperture where heat removal would be difficult. Decreasing the cathode power leads to nonuniform getter thin film thickness, since it is highly dependent on cathode current density. One way to reduce temperature without sacrificing in uniformity of film thickness is to apply pulsed method. The idea behind the pulsed mode is to generate pulses, during which the pulse-width modulation signal is sent to the field-effect transistor gate and the current through gas-discharge cell is generated. The current is integrated using an inductance. The controller unit as well as PC application which implement this method were designed. First experiments show increased thickness uniformity of getter films compared to non-pulsed sputtering.

Now it is impossible to imagine an ultra-high vacuum system without the use of vacuum pumps based on non-evaporable getters. This paper describes the construction of non-evaporable getter pump from modern domestic materials. The measured characteristics for hydrogen and its isotopes for the application in synchrotron sources and in fusion research will be presented as well. For example, in the vacuum system of neutral beam injectors (hydrogen and deuterium pumping speeds are equal millions of liter per second by pressure of $10^{-5}$ Torr). Effective pumping speeds of prototype of the order of 1300 l/s for hydrogen and 700 l/s for deuterium were achieved. These values are in good agreement with understanding of the processes in the behavior of the non-evaporable getter pump during evacuation of hydrogen and deuterium. The reasons why the effective pumping speed for deuterium is less by two times rather than the square root from two is discussed.

— The review presents the experiments performed with the KEDR detector at the e^ + e^ - collider VEPP-4M in the energy range of √(s) = 1.84–3.88 GeV. The cross section of e^ + e^ - annihilation to hadrons was measured at 22 points of this range and the search for narrow resonances was conducted below 3.1 GeV. The masses of J / . -0emψ and ψ (2S) mesons were measured with a record accuracy better than 3 ×10^ - 6 ; their partial and total widths were determined. Measurements of the tau lepton mass and masses of charged and neutral D mesons were performed with high precision. The measurements of the ψ (3770) parameters are discussed, and attention is drawn to some inconsistency of the procedure employed by the Particle Data Group for determining its parameters.

The paper analyzes the development of strapdown inertial airborne gravimeters, which have significant advantages over gyrostabilized gravimeters in terms of size, power consumption and cost and substantially expand the capabilities of gravity survey. Technical solutions are described that make implementation of strapdown airborne gravimeters possible. The trends in their development are discussed, including integration of data from strapdown and gyrostabilized gravimeters.

We present the study of the decay J/ψ → ρπ . The results are based on of 5.2 million J/ψ events collected by the KEDR detector at the VEPP-4M collider. The branching fractions are measured to be ℬ ( J/ψ → ρπ ) = (2 . 072 ± 0 . 017 ± 0 . 062) ∙ 10 − 2 and ℬ ( J/ψ → π + π − π 0 ) = (1 . 878 ± 0 . 013 ± 0 . 051) ∙ 10 − 2 , where the first uncertainties are statistical and the second systematic. Our results are more precise than the previous relative measurements.

Lumped vacuum pumps based on non-evaporable getters are widely used in vacuum systems of charged particle accelerators. This type of pump will be used in the 4+ generation synchrotron at the Siberian Ring Source of Photons shared resource center. Prototypes of getter pumps with hydrogen pumping speeds of 300, 600, 900, and 1300 L/s are being manufactured and tested at the Budker Institute of Nuclear Physics. The designs of pumps are described, along with results from their tests.

The VEPP-2000 is an electron–positron collider with round beams built and operating at the Budker Institute of Nuclear Physics (BINP). The collider luminosity was increased twofold last year. The integrated luminosity accumulated over the last year has exceeded 0.3 fb –1 , which almost doubled the total data collected since the collider operation began. The short description of the VEPP-2000 complex, current status, and the results are presented in this work.

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.

Abstract Using the 1.32 $$\hbox {pb}^{-1}$$ pb - 1 statistics collected at the $$J/\psi $$ J / ψ peak with the KEDR detector at the VEPP-4M $$e^{+}e^{-\, }$$ e + e - collider, we measured the branching fractions of $$J/\psi $$ J / ψ meson decays to the final states 2( $$\pi ^{+}\pi ^{-})\pi ^{0}$$ π + π - ) π 0 , $$K^{+}K^{-}\pi ^{+}\pi ^{-}\pi ^{0}$$ K + K - π + π - π 0 , 2( $$\pi ^{+}\pi ^{-})$$ π + π - ) and $$K^{+}K^{-}\pi ^{+}\pi ^{-}$$ K + K - π + π - . The results obtained for the decays $$J/\psi \rightarrow $$ J / ψ → 2( $$\pi ^{+}\pi ^{-})\pi ^{0}$$ π + π - ) π 0 , $$J/\psi \rightarrow K^{+}K^{-}\pi ^{+}\pi ^{-}\pi ^{0}$$ 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.

Using the 1.32 pb(-1) statistics collected at the J/psi peak with the KEDR detector at the VEPP-4M e(+)e(-) collider, we measured the branching fractions of J/psi meson decays to the final states 2(pi(+)pi(-))pi(0), K+K- pi(+)pi(-)pi(0), 2(pi(+)pi(-)) and K+K- pi(+)pi(-). The results obtained for the decays J/psi -> 2(pi(+)pi(-))pi(0), J/psi -> K+K- pi(+)pi(-)pi(0) contradict the measurements performed by other groups in the last century, but agree well with recent results of BABAR and BESIII collaborations.

Methods to measure absolute gravity and deflections of the vertical on a moving base are presented. The breadboard of integrated gravimetric system is described. The first results of experimental studies confirmed the possibility of high-precision measurement of the absolute values of gravity and deflection of the vertical at sea.

This chapter provides a historical overview of gravimetric surveys in the Arctic. Findings from modern airborne gravimetric surveys in the Arctic carried out by Russian and international companies are analyzed. Marine and airborne gravimetric surveys using the Chekan gravimeters in hard-to-reach areas of the Earth, such as the Geographic North Pole, the Greenland shelf, coastal seas of the Antarctic, and the Himalayas are addressed. Polar versions of the GT-2A gravimeter with the necessary modifications of equipment and software for all-latitude applications are covered. Application of multi-antenna GNSS receivers in these areas is analyzed, and the method of transition to quasi-geodetic coordinates is described.

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 paper presents an overview of electrostatic accelerometers designed for various space projects. Engineering solutions aimed at high accuracy of measurements are described. Applications and development trends of electrostatic accelerometers, as well as the ways to improve their operation performance are discussed.

The results of a study of outgassing of boron carbide and durable ultrahigh molecular weight polymethyl methacrylate (organic glass) in vacuum are presented. It is shown that boron carbide manufactured by OOO Virial (St. Petersburg) by the cold-pressing technique, which is followed by free sintering at a temperature of approximately 2200°C, meets the requirements that are stated by the ITER (International Thermonuclear Experimental Reactor). The results studying ultrahigh molecular weight durable polymethyl methacrylate (UMW-PMMA), which was manufactured at the Institute of Solid-State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences (ISSCM SB RAS) using original technologies, showed that UMW-PMMA with frontal polymerization has the lowest gas emission compared to “conventional” PMMA and is very promising for the manufacture of specialized vacuum chambers for electrophysical facilities.