[en] Microchannel plate photomultiplier tubes (MCP PMT) can work in a high magnetic field and have an excellent time resolution. The influence of the magnetic fields up to 4 T on the parameters of several MCP PMTs of different designs was investigated. PMTs with two, three and four MCPs were tested in magnetic fields. The tested samples have different diameters of MCP pores: 3.5, 6, 8 and 10 microns. Dependencies of the time resolution, the gain and the photoelectron collection efficiency on the magnetic field are presented below.

[en] A time-of-flight detector based on microchannel plates (MCP) is under development. The main goal of this work is the creation of a radiation hard large area detector providing 10 ps time resolution in strong magnetic field. The conceptual detector design is described in details.

[en] In this paper we investigated Cherenkov radiation component influence on the time of charged particle detection in LYSO(Ce) crystals. Description of the experiment setup and Monte Carlo simulation scheme are given. The scintillation and Cherenkov radiation processes in LYSO(Ce) crystal were simulated and studied experimentally with electron beam at Budker Institute of Nuclear Physics beam test facilities. The results of the measurements and simulation are presented. The effect of particle detection time shift due to Cherenkov radiation was obtained. It amounts of several tens of picoseconds for LYSO(Ce) crystal bar (it has dimensions of $3\times <!--\; ??\; -->4\times <!--\; ??\; -->50$ mm${}^3$). Beam test results are in good agreement with calculations.

[en] Detectors based on microchannel plates (MCP) can provide high time resolution and are able to operate in high magnetic field. An experimental setup based on a superconductive solenoid with 120 mm bore was created in BINP. The influence of magnetic field up to 4.5 T on the MCP photomultiplier parameters was studied. Several types of photodetectors produced in Novosibirsk were tested. Results of time resolution measurements, dependencies of gain and photon detection efficiency on magnetic field are presented.

[en] At the high luminosity LHC (HL-LHC) about 200 concurrent interactions are expected, with a spread between the interaction vertices of few centimeters in the beam direction and 200 ps in the collision time. A time of flight resolution of the order of 30 ps would be able to reduce neutral particles pile-up contamination at the calorimeter level of about one order of magnitude, restoring pile-up conditions similar to what is routinely sustained in the current run of the LHC . Micro-channel plates have been used in PMT configuration as fast charged particles detector (resolution of better than 20 ps have been achieved with commercial devices), however they are not particularly radiation tolerant, mostly due to the ion feedback on the photocathode. The possibility of using micro-channel plates without a photocathode (i-MCP) has been studied in several test beams. Different MCP geometries are compared with the goal to identify the optimal configuration. Efficiency of more then 70% with a time resolution of better than 40 ps are achieved for single charged particles, leading to an efficiency close to 100% for EM shower after few radiation lengths. This open the possibility to use i-MCPs as a timing layer in a sampling calorimeter or to use it in a pre-shower device independent from the calorimeter technology.

[en] Since recently, the design of the detector for the Super Charm-Tau Factory has been actively developed at the Budker Institute. The principal tasks of the detector tracking system are to provide efficient reconstruction of charged-particle tracks, to determine their momenta and impact parameters with high precision and to identify particles using their energy losses. This article describes various issues related to the development of the drift chamber, the main part of the tracking system.

[en] We report results of experiments performed with the KEDR detector at the VEPP-4M e⁺ e^- collider.They include precise measurement of the D⁰ and D^± meson masses, determination of the ψ(3770) resonance parameters,and a search for narrow resonances in e⁺ e^- annihilation at center-of-mass energies between 1.85 and 3.1 GeV. (authors)

[en] We present a study of the inclusive photon spectra from 5.9 million J/ψ decays collected with the KEDR detector at the VEPP-4M e⁺ e^- collider. We measure the branching fraction of radiative decay J/ψ → η_c γ, η_c width and mass. Our preliminary results are: M(η_c)=2979.4 ± 1.5 ± 1.9 MeV/c², Γ(η_c)=27.8±5.1±3.3 MeV, Β(J/ψ → η_c γ)=(2.34 ± 0.15 ± 0.40)%. (authors)