[en] Results of the experiment on the extraction of fluorine parent nucleus fragments (¹⁹F), ¹²B, ¹⁴C, ¹⁶N, etc. from the internal target of the JINR synchrotron via the slow extraction channel are presented. The upper boundary of the yield of fragments with fractional charge (Z = 7.7) is evaluated. Characteristics of the fragment momenta distribution are measured. The momentum of ¹⁹F primary nuclei is approximately 4 GeV/c nucl. The study of secondary nuclei, formed in the synchrotron internal target permitted to determine charge composition and intensity of secondary nuclei beams: in C¹⁴ nuclei extraction mode its partial intensity is 70 %, the yield of C¹⁴ nuclei into the channel per one ¹⁹F primary nucleus is 3 x 10^-5. Cross section of fluorine nucleus charge-exchange into oxygen is evaluated: σ(¹⁹F → ¹⁹O) ≅ 3 x 10^-29 cm². At the level 3 x 10^-31 cm² no nuclei with fractional charges were found

[en] New developments in gas mixtures of charged-particle detectors for the time between the 4th Vienna Wire Chamber Conference (1986) and the end of 1988 are presented. New results of ion pair production and transportation, properties of gases for proportional and drift chambers, Pestov's planar spark counters, self-quenching streamer discharge detectors and some aspects of aging effects are discussed. (orig.)

[en] A 500-wire proportional-chamber telescope is described applied in the full-absorption spectrometer coordinate channel. The telescope comprises six proportional chambers (160x160) mm² with gaps between signal and high-voltage planes of 4 mm. The recording electronics are briefly described, chamber technical characteristics are given

No abstract available

[en] The dedicated remote center of the CMS Experiment at the LHC has been founded in JINR (Dubna). The main mission of the center is operational and efficient monitoring of the CMS detector systems, including the measurements of performance parameters during the prompt data analysis, monitoring of data acquisition and quality of data. Since 2009 the center is involved in remote shifts and operation works of the CMS

[en] The aim of this work is to increase the efficiency of muon track reconstruction and estimate a number of electromagnetic secondaries in the muon detector on experimental data of the Integrated Test set-up, the prototype of CMS end cap segment. The experimental data have shown that the high energy beam of muons (100-300 GeV) produces 20-25% of events with electromagnetic secondaries. Though the muon coordinate measurements were distorted by secondaries, we have managed to obtain a high efficiency (≥ 92%) of the muon track reconstruction

[en] The structure of the monitor is described. It consists of 5 counters with scintillators-plates in each, and 1 counter with ''comb'' scintillator which are located on the length of 18 m. The monitor provides the beam control, trace and time information measurements, start-up of the detector read-out systems and of the computer. Some examples of profiles of the beam and of the ''comb''-scintillator measurements are presented. The monitor permits to investigate characteristics of drift and proportional chambers, drift tubes, to measure charged particle beam parameters

[en] A microcircuit amplifier-shaper for proportional chambers is described. It has a low time instability of output pulses and short recovery time, which allows it to be used when increased time resolution is required. The circuit diagram of the device is given as well as its main parameters. The recording threshold is not higher than 0.8 mB, the input resistance is not greater than 600 ohm, the recovery time does not exceed 55 ns and the time instability is 9 ns

[en] The ME1/1 cathode strip chambers are the part of the CMS endcap muon system. They were designed and produced in Dubna. The chambers have been installed in the detector and commissioning has been completed. This paper describes chamber readout electronics and presents the results of the tests with cosmic-ray muons

[en] The physics potential and perspectives of the future experiments at the CMS detector at the LHC (CERN) are discussed. The status report is given on the research, development and construction of the CMS Endcap detector, where JINR bears a full responsibility in the frame of the Russia and JINR (RDMS CMS) collaboration