Publications (24)6.16 Total impact
-
Article: Hadron calorimeters of the FODS setup
[show abstract] [hide abstract]
ABSTRACT: Designs of the hadron calorimeters for the FODS setup and the procedure for their calibration are described. Results of investigations of their characteristics on electron and hadron beams are presented.Instruments and Experimental Techniques 05/2012; 53(4):500-505. · 0.36 Impact Factor -
Article: Fods Hadron Calorimeters
[show abstract] [hide abstract]
ABSTRACT: There is described the design of the FODS hadron calorimeters, the procedure of the calibration and the results of the calorimeter study with electron and pion beams. Comment: 7 pages, 9 figures12/2009; -
Article: Measurement of the analyzing power of high-transverse-momentum charged hadrons in proton-nucleus collisions at an energy of 40 GeV
[show abstract] [hide abstract]
ABSTRACT: The transverse single-spin asymmetry was measured for charged hadrons (π ±, K ±, p, [`(p)]\bar p ) produced in proton-nucleus collisions. The measurements were performed at the FODS-2 spectrometer by using a polarized proton beam that was accelerated to an energy of 40 GeV at the accelerator of the Institute for High Energy Physics (IHEP, Protvino) and which was made to hit carbon and copper nuclear targets. The data in question were obtained in the range of c.m. angles between 73° and 94° near the central region (−0.01 < x F < 0.27, 0.7 < p T < 3.6 GeV/c). The single-spin asymmetry for π + and K + mesons is significant at high values of p T and moderately small positive values of x F. The analyzing power for other hadrons (π −, K −, p, [`(p)]\bar p ) is compatible with zero in the p T range studied here. The dependence of the analyzing power on the mass number of the target nucleus is insignificant.Physics of Atomic Nuclei 09/2007; 70(10):1743-1751. · 0.57 Impact Factor -
Article: Single-spin asymmetry for high- p T charged hadrons at negative x F in proton-nucleus collisions at an energy of 40 GeV
[show abstract] [hide abstract]
ABSTRACT: The transverse single-spin asymmetry was measured for charged hadrons (π ±, K ±, p, [`(p)]\bar p ) produced in proton-nucleus collisions. The measurements were performed with the aid of the FODS-2 spectrometer by using a 40-GeV polarized proton beam from the accelerator of the Institute for High Energy Physics (IHEP, Protvino) and carbon and copper nuclear targets. The data subjected to the analysis in the present study were obtained for c.m. angles in the range 95°–112° in the vicinity of the central region (−0.08 < x F < −0.06, 0.7 < p T < 3.4 GeV/c). The analyzing power is found to be only slightly dependent on the mass number of the target nucleus. The basic results obtained by measuring the single-spin asymmetry at three values of the particle-detection angle are discussed.Physics of Atomic Nuclei 09/2007; 70(10):1752-1758. · 0.57 Impact Factor -
Article: Single-spin asymmetry for charged hadrons produced in proton-nucleus collisions at 40 GeV for c.m. production angles in the range 40°–79°
[show abstract] [hide abstract]
ABSTRACT: The transverse single-spin asymmetry for charged hadrons (π ±, K ±, p, [`(p)]\bar p ) produced in proton-nucleus collisions was measured for c.m. production angles in the range 40°–79°. The measurements were performed with the FODS-2 setup by using a 40-GeV polarized proton beam originating from the accelerator of the Institute for High Energy Physics (Protvino) and hitting carbon and copper nuclear targets. The data in question were obtained in the polarized-proton-fragmentation region (0.0 < x F < 0.7, 0.6 < p T < 2.5 GeV/c). In agreement with data obtained at other energies, the single-spin asymmetry for π ± mesons is significant at high x F. For the first time, a sizable analyzing power, which changes sign at x F = 0.43, is observed for protons. The dependence of the analyzing power on the target-nucleus mass is insignificant.Physics of Atomic Nuclei 01/2007; 70(9):1515-1526. · 0.57 Impact Factor -
Article: Observation of multiparton interactions in proton-nucleus collisions at 70 GeV
[show abstract] [hide abstract]
ABSTRACT: The production of noncoplanar hadron pairs in proton-nucleus interactions is studied experimentally for the case where the transverse momenta of product particles are in excess of 1 GeV/c. The values obtained for the exponent in the A dependence of the cross section for the production of noncoplanar hadron pairs are substantially greater than those for coplanar pairs. This nuclear-mass-number dependence for the production of hadron pairs can be explained by the contribution of multiparton interactions in proton-nucleus collisions.Physics of Atomic Nuclei 01/2006; 69(5):860-864. · 0.57 Impact Factor -
Article: Spin physics program in the U70 polarized proton beam
[show abstract] [hide abstract]
ABSTRACT: A possibility to accelerate a high intensity polarized proton beam up to 70 GeV at the IHEP accelerator, extract it from the main ring and deliver to several experimental setups is being studied now. We propose to study a wealth of single- and double-spin observables in various reactions using longitudinally and transverserly polarized proton beams at U70. The proposed measurements can be done at the existing detectors as well as require to create a few new experimental setups at U70.12/2005; -
Article: Single Spin Asymmetry of Charged Hadron Production by 40 GeV/c Polarized Protons
[show abstract] [hide abstract]
ABSTRACT: The single spin asymmetry for charge hadron production off nuclei (C, Cu) has been measured using 40 GeV/c polarized proton beam. The measurements were carried out using FODS-2 experimental setup at IHEP. The data are presented in the central region and the forward region with respect to the incident protons.12/2005; -
Article: Single Spin Asymmetry in High Pt Charged Hadron Production off Nuclei at 40 GeV
[show abstract] [hide abstract]
ABSTRACT: The single transverse spin asymmetry data for the charged hadron production in pC and pCu interactions are presented. The measurements have been performed at FODS-2 experimental setup using 40 GeV/c IHEP polarized proton beam. The hadron transverse momentum range is from 0.5 GeV/c up to 4 GeV/c. The data obtained off the nuclear targets are compared with the proton target data measured earlier with the same experimental setup and with the data of other experiments.01/2005; -
Article: Production and quality control of optical elements for the end cap hadron calorimeter of the CMS setup
[show abstract] [hide abstract]
ABSTRACT: An end cap hadron calorimeter, in which scintillators with wavelength-shifting fibers are used as the active elements, has been designed for the compact muon spectrometer (CMS) now under construction at CERN. A total of 1368 optical elements containing 21 096 scintillators have already been manufactured. The production and quality control procedures for these optical elements are described.Instruments and Experimental Techniques 12/2004; 48(1):22-31. · 0.36 Impact Factor -
Article: A Test Setup for Scintillation Counters
[show abstract] [hide abstract]
ABSTRACT: A setup has been developed for testing mass-produced scintillation counters. Its design and the quality control procedure for the scintillation counters of the hadron calorimeter are described.Instruments and Experimental Techniques 10/2004; 47(6):751-754. · 0.36 Impact Factor -
Article: Characteristics of a Sector of the Endcap Hadron Calorimeter for the CMS Facility
[show abstract] [hide abstract]
ABSTRACT: The characteristics of the prototype of the endcap hadron calorimeter for the CMS facility have been measured. Using the relations between the measured calorimeter response to a radiation source, muons, and pions, it is possible to determine the energy scale of the data-acquisition electronics, which will be used in future experiments along with the calorimeter. The light yield in the calorimeter due to a minimum-ionizing particle was measured. The effect of various factors on the duration of the calorimeter signal is analyzed. The joint operation of the hadron and electromagnetic calorimeters was investigated. The possibility of adjusting the uncompensated system using the data from a scintillation counter inserted between the calorimeters is analyzed. It is shown that the presence of a structural material between the calorimeters will not lead to a noticeable degradation in the energy resolution of the hadron calorimeter.Instruments and Experimental Techniques 12/2003; 47(1):47-52. · 0.36 Impact Factor -
Article: Production Asymmetry Measurement of High Xt Hadrons in pp Collisions at 40 GeV
[show abstract] [hide abstract]
ABSTRACT: Single-spin asymmetries for hadrons have been measured in collisions of transversely-polarized 40 GeV/c proton beam with an unpolarized liquid hydrogen target. The asymmetries were measured for pi+-, K+-, protons and antiprotons, produced in the central region (0.02 < Xf < 0.10 and 0.7 < Pt < 3.4 GeV/c). Asymmetries for pi+-, K+- and antiprotons show within measurement errors the linear dependence on Xt and change a sign near 0.37. For protons negative asymmetry, independent of Xt has been found. The results are compared with those of other experiments and SU(6) model predictions.11/2001; -
Article: The Laser Monitoring System of a Scintillation Calorimeter
[show abstract] [hide abstract]
ABSTRACT: The monitoring system of the scintillation sandwich calorimeter is based on scintillator excitation by UV radiation. The system is composed of a nitrogen laser, neutral filters (7 stages of the laser-signal attenuation), and a set of laser-radiation distributors among the quartz fibers transmitting the light towards the scintillator tiles. The system is computer-controlled. A 780-channel system for monitoring the prototype calorimeter of the CMS setup was developed. The efficiency of the monitoring system was demonstrated by testing it on the accelerator beam. The error in measuring the amplitude of a laser-generated scintillation was 1%. The long-term stability of the system was characterized by a variance of 1.1%.Instruments and Experimental Techniques 01/2000; 43(6):735-742. · 0.36 Impact Factor -
Article: Observation of a puzzlingA-dependence of symmetric hadron pairs at highP⊥
[show abstract] [hide abstract]
ABSTRACT: Symmetric hadron pair production cross section (+ +, + K +, + p,K + p, andpp) were measured in the range 0.48P 2.29 GeV/c from Be, Cu, and Pb targets bombarded by 70 GeV protons. TheA-dependence exponent as a function ofP differs for varios pairs.A steep drop of for meson pairs atP >1.5 GeV/c is observed.Zeitschrift für Physik C 11/1985; 27(4):491-493. -
Article: HighP∧ hadron production off nuclei at 70 GeV
[show abstract] [hide abstract]
ABSTRACT: Invariant cross sections for hadron production ([`(p)]\bar p ) by protons off C, Al, Cu, Sn and Pb nuclei have been measured at 70 GeV for theP range from 1 up to 4.65 GeV/c. TheA-dependence of the invariant cross section is not described by the exponentialA (P ), which points to the presence of secondary hadron absorption in nuclei.Zeitschrift für Physik C 08/1984; 24(3):205-215. -
Article: Production of hadrons with transverse momenta 0. 5--2. 2 GeV/c in pd collisions at 70 GeV
[show abstract] [hide abstract]
ABSTRACT: We report the results of a study of the production of ..pi../sup + -/, K/sup + -/, p, and p-bar with transverse momenta in the range from 0.5 to 2.2 GeV/c in pd collisions at proton energy 70 GeV at a c.m.s. angle 90 /sup 0/. The ratios of the particle yields in deuterium are compared with the ratios in hydrogen and in nuclei and with a calculation according to the quantum-chromodynamical parton model.Sov. J. Nucl. Phys. (Engl. Transl.); (United States). 05/1980; 31:6. -
Article: Production and Quality Control of the CMS End Cap Hadron Calorimeter Optical Elements
[show abstract] [hide abstract]
ABSTRACT: The end cap hadron calorimeter designed for the Compact Muon Solenoid (CMS) experiment is a sampling calorimeter with active elements based on scintillators read by wave length shifting fibers. We have fabricated 1368 optical elements containing 21096 scintillators. The production and the quality control of the optical elements are described.Nuclear Physics B - Proceedings Supplements 150:110-113. · 0.88 Impact Factor -
Article: Production asymmetry measurement of high $x_{T}$ hadrons in p$\uparrow$p- collisions at 40 GeV
-
Article: Particle identification by low-efficiency “thin” chambers
[show abstract] [hide abstract]
ABSTRACT: Particle identification by counting the number of fired low-efficiency “thin” chambers was tested with a proportional chamber with electrodes made of aluminized Mylar, 2 mm apart and a signal electrode between them. Pion and proton separation was measured as a function of gas pressure, high voltage and gas mixture. The results show that particles in the relativistic rise can be separated by a detector of less than 2 m length at atmospheric pressure.Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 283(3):628-629. · 1.21 Impact Factor
Top Journals
Institutions
-
1984–2012
-
Институт физики высоких энергий
Protvino, Moskovskaya, Russia
-
-
2000–2007
-
Institute of High Energy Physics
Protvino, Moskovskaya, Russia
-