S.I. Mishnev

Budker Institute of Nuclear Physics

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Александр Николаевич Скринский

Budker Institute of Nuclear Physics

S. G. Popov

Budker Institute of Nuclear Physics

I. A. Rachek

Budker Institute of Nuclear Physics

D. M. Nikolenko

Budker Institute of Nuclear Physics

V.L. Auslender

Budker Institute of Nuclear Physics

Robert Kowalczyk

Jet Propulsion Laboratory

R. Gilman

Rutgers, The State University of New Jersey

V. N. Stibunov

Tomsk Polytechnic University

Yu. M. Shatunov

Novosibirsk State University

A.G. Khabakhpashev

Budker Institute of Nuclear Physics

Cooperative Institutions

Budker Institute of Nuclear Physics

Siberian Branch of the Russian Academy of Sciences

Russian Academy of Sciences

Novosibirsk State University

Argonne National Laboratory

Tomsk Polytechnic University

Thomas Jefferson National Accelerator Facility

Campbell Collaboration

Novosibirsk State Technical University

California Institute of Technology

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Storage rings VEPP-2M, VEPP-3 and VEPP-4 as the sources of the synchrotron radiation

Nuclear Instruments and Methods (1978)

G.I. Budker Г.Н. Кулипанов S.I. Mishnev I.Ya. Protopopov A.N. Skrinsky

10.1016/0029-554x(78)90229-x

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THE NUMBER OF EXTENSIVE ATMOSPHERIC COSMIC RAY SHOWERS NEAR SEA LEVEL

Zhur. Eksptl'. i Teoret. Fiz. (1960)

S.I. Mishnev S.I. Nickol'skii

A scheme is suggested for recording extensive showers and determining the number of particles by correlating the flux density at various points near sea level. Recordings were made of quadruple discharge coincidences which were not followed by triple coincidences in either of three counters placed at approximately 6 m from the center of the installation. The area of all counters ( sigma ) in all recording channels, including anticoincidence channels, varied simultaneously ( sigma = 0.4m/sup 2/; 0.2m/sup 2/; 990 cm/sup 2/; 330 cm/sup 2/; and 165 cm/sup 2/ ). Numerical calculations of recorded showers are approximated to integral spectra f(>n) = A/N/sup 1.45/ with the assumption that charged particle spatial distributions are not related to the number of particles in the shower. The results are in good agreement with data obtained by T. Abrasimov et al. (Izvest. Akad. Nauk SSSR, Ser. Fiz. 19. 66(1955)). The results obtained for counter area sigma = 0.4m/sup 2/ are plotted. The calculations and experimental data (for H = 200 m above sea level) are correlated, considering the spectrum value A = 9 x 10/sup 4/ m/sup -2/ hour/sup -1/. more » (R.V.J.) NOTE: ABSTRACT NO. 14245 CAN NOT BE SCANNED BECAUSE OF ILLEGAL CHARACTER. « less

Sigma

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Production of an e/sup +/e/sup -/ pair by a photon of synchrotron radiation in colliding electron beams

Sov. J. Nucl. Phys. (Engl. Transl.); (United States) (1987)

A. E. Blinov A. Bondar A. D. Bukin A. Vorobev V.R. Groshev

The Bethe-Heitler process for production of an e/sup +/e/sup -/ pair has been observed for the first time in collision of a photon of synchrotron radiation with an electron of a colliding beam. The experiment was carried out by means of the MD-1 detector in the storage ring VE-acute-accentPP-4 at an energy 2 x 5.14 GeV. At this energy the counting rate is comparable with the counting rate of the reaction e/sup +/e/sup -/..-->..e/sup +/e/sup -/e/sup +/e/sup -/. The data of the experiment are in agreement with a calculation according to quantum electrodynamics.

Pair production

Photon energy

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Tests of a polarized source of hydrogen and deuterium based on a spin-exchange optical pumping and a storage cell for polarized deuterium

AIP conference proceedings (1989)

R. J. Holt R. Gilman Ed Kinney Robert Kowalczyk J. Napolitano

A novel laser‐driven polarized source of hydrogen and deuterium which is based on the principle of spin‐exchange optical pumping has been developed at Argonne. The advantages of this method over conventional polarized sources for internal target experiments is discussed. At present, the laser‐driven polarized source delivers hydrogen 8×1016 atoms/s with a polarization of 24% and deuterium at 6×1016 atoms/s with a polarization of 25%. A passive storage cell for polarized deuterium was tested in the VEPP‐3 electron storage ring. The storage cell was found to increase the target thickness by approximately a factor of three and no less in polarization was observed.

Optical Pumping

10.1063/1.38333

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Effects of electromagnetic coupling of particles with a colliding bunch

Soviet Atomic Energy (1966)

Ya. S. Derbenev S.I. Mishnev Александр Николаевич Скринский

Betatron

Bunches

10.1007/bf01127383

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EFFECTS OF ELECTROMAGNETIC INTERACTION BETWEEN PARTICLES AND COLLIDING BUNCH.

Ya. S. Derbenev S.I. Mishnev Александр Николаевич Скринский

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Two-photon exchange and elastic scattering of positrons/electrons on the proton

Proceedings of 35th International Conference of High Energy Physics — PoS(ICHEP 2010) (2011)

D. Nikolenko J. Arrington Л.М. Барков В. Ф. Дмитриев V. V. Gauzshteyn

We report the experiment on a precise comparison of (e + p) and (e -p) elastic scattering cross sections, which gives a direct experimental evidence for the two-photon exchange contribution to this reaction.Such data are in demand now, because they, most likely, may explain the dramatic disagreement of proton electromagnetic form factors measurements in the polarization transfer experiments at TJNAF with previous unpolarized measurements using a Rosenbluth separation technique.Experiment was performed recently at VEPP-3 storage ring at the energy of positron/electron beams of 1.6 GeV and at e + /e -scattering angles around 20 • and 65 • .The preliminary results for the cross sections ratio R = σ (e + p)/σ (e -p) are presented.

Electron scattering

10.22323/1.120.0164

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Two-photon production of e/sup +/e/sup -/ pairs with small invariant mass

Sov. J. Nucl. Phys. (Engl. Transl.); (United States) (1986)

E.A. Blinov A. Bondar A. D. Bukin A. Vorobev V.R. Groshev

An experiment was carried out to study the process e/sup +/e/sup -/..-->..e/sup +/e/sup -/+e/sup +/e/sup -/. The average value of the invariant mass of the events recorded is 2 MeV. These small mass values became accessible for detection as a result of the fact that the magnetic field of the MD-1 detector is directed perpendicular to the plane of the orbit of the beams. The experiment was carried out in the storage ring VEPP-4 at energy 2 x 1.8 GeV. The main background of the process is pair production by photons of synchrotron radiation from the electrons of the colliding beams. The background level was 10% of the effect. The results of the experiment are in agreement with calculations according to quantum electrodynamics.

Pair production

Invariant mass

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BEAM DIAGNOSTIC AT THE VEPP-4 ACCELERATOR COMPLEX. (IN RUSSIAN)

E. N. Dement’ev N.I. Zinevich A.S. Kalinin A.S. Medvedko S.I. Mishnev

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EXPERIMENTAL INVESTIGATIONS OF BEAM--BEAM INTERACTION IN STORAGE RINGS.

V.L. Auslender N S Dikanskii G.N. Kulipanov S.I. Mishnev S. G. Popov

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