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Dive into the research topics where Valery I. Telnov is active.

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Featured researches published by Valery I. Telnov.


Nuclear Instruments and Methods in Physics Research | 1983

COLLIDING ge AND gg BEAMS BASED ON THE SINGLE-PASS e ~ e COLLIDERS (VLEPP TYPE)

Ilya F. Ginzburg; G.L. Kotkin; V. G. Serbo; Valery I. Telnov

Abstract We discuss in detail our proposed [1,2] method of obtaining colliding γe and γγ beams with high energies and luminosities using the designed linear accelerators VLEPP and SLC with colliding e + e − beams at the energies 2 E ≳ 100 GeV. The intense γ beams are obtained by backward Compton scattering of laser light which is focused on the electron beams of these accelerators. This paper contains the scheme for conversion of an electron beam into a γ beam, a calculation of the conversion coefficient and of the total and spectral γe and γγ luminosities. To get the luminosity L γ e , L γγ ∼ L ee , one needs a laser flash with energy ∼ 15J, and a pulse duration ∼ 30 ps at a repetition rate of 10 or 180 Hz. Such parameters seem to be achievable on the basis of current technology. The luminosity distribution over the γe or γγ invariant mass is broad. A method of monochromatization is described. It demands an increase of the laser flash energy (with a possible increase of pulse duration) and leads to a decrease of luminosity. We also describe a method for calibrating the total and spectral luminosities. Problems concerning the background are shown to be easier than in e + e − collisions. Some examples of interesting physical problems for γe and γγ collisions are enumerated.


Nuclear Instruments and Methods in Physics Research | 1984

Colliding γe and γγ beams based on single-pass e+e− accelerators II. Polarization effects, monochromatization improvement

Ilya F. Ginzburg; G.L. Kotkin; S.L. Panfil; V. G. Serbo; Valery I. Telnov

Polarization effects are considered in colliding γe and γγ beams, which are proposed to be obtained on the basis of linear e+e− colliders (by backward Compton scattering of laser light on electron beams). It is shown that using electrons and laser photons with helicities λ and Pc, such that λPc<0, essentially improves the monochromatization. The characteristic laser flash energy, A0, which is necessary to obtain a conversion coefficient k ≈ 1 with a definite degree of monochromatization, is considerably less (sometimes by one order of magnitude) in the case 2λPc = −1 in contrast to the case λPc=0. Simultaneously the luminosities Lγe and Lggγ essentially increase. Formulae are obtained which allow one to extract the polarization information about γe → X and γγ → X reactions. Perculiarities connected with the specific scheme of the γ beam preparation are discussed. Problems of the calibration of the γe and γγ collisions for the polarized beams are discussed.


Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1995

Principles of photon colliders

Valery I. Telnov

Abstract Future linear colliders offer unique opportunities to study γγ, γe interactions. Using the laser backscattering method one can obtain γγ, γe colliding beams with energy and luminosity comparable to the electron-position luminosity or even higher. In this review physical principles of photon colliders are described and various problems, concerning the accelerator, laser, interaction region and luminosity are discussed. Some examples of physical processes are given.


Physical Review Letters | 1997

Laser cooling of electron beams for linear colliders

Valery I. Telnov

Abstract A method for electron beam cooling is considered which can be used for linear colliders. The electron beam is cooled during collision with a focused powerful laser pulse. The ultimate transverse emittances are much lower than those achievable by other methods. This method is especially useful for high-energy photon colliders. In this paper we review and analyze limitations in this method, discuss a new method of obtaining very high laser powers required for the laser cooling, radiation conditions and finally present a possible scheme for the laser cooling of electron beams.


arXiv: High Energy Physics - Experiment | 2000

Status of gamma-gamma and gamma-electron colliders

Valery I. Telnov

Abstract This report on Photon Colliders briefly reviews three main issues: physics motivation, possible parameters and technical feasibility, plans of works and international cooperation. New scheme of laser optics at the interaction region is described which can drastically (at least by one order) reduce the cost of the laser system.


Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2002

Precision luminosity measurement at LHC using two-photon production of

A. G. Shamov; Valery I. Telnov

The application of the two-photon process pp → pp+µ + µ − for the luminosity measurements at LHC with the ATLAS detector is considered. The expected accuracy of the absolute offline luminosity determination is 1÷ 2 % for the luminosity range of 10 33 ÷10 34 cm −2 s −1 . The preliminary cross section estimates done for LHCb promise the same level of the luminosity measurement accuracy at L = 2 · 10 32 cm −2 s −1 .


Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2000

\mu^{+}\mu^{-}

Valery I. Telnov

Abstract Using the laser backscattering method in future linear colliders one can obtain γγ and γe colliding beams (photon colliders) with energy and luminosity comparable to that in e + e − collisions. A key element of a photon collider is a laser with high peak power and repetition rate. One very promising way to overcome this problem is the optical cavity. A very high γγ luminosity could be achieved by further decreasing the beam emittances. One possible way is laser cooling of electron beams. The solution to the first problem is vital for photon colliders and provides an interesting physics program. Solution of the second problem makes photon colliders a very powerful instrument for study of matter. Ways to these goals are discussed in this talk.


Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2001

pairs

Michael Galynskii; E. A. Kuraev; Michael Levchuk; Valery I. Telnov

The backward Compton scattering is a basic process at future higher energy photon colliders. To obtain a high probability of e->gamma conversion the density of laser photons in the conversion region should be so high that simultaneous interaction of one electron with several laser photons is possible (nonlinear Compton effect). In this paper a detailed consideration of energy spectra, helicities of final photons and electrons in nonlinear backward Compton scattering of circularly polarized laser photons is given. Distributions of gamma-gamma luminosities with total helicities 0 and 2 are investigated. Very high intensity of laser wave leads to broadening of the energy (luminosity) spectra and shift to lower energies (invariant masses). Beside complicated exact formulae, approximate formulae for energy spectrum and polarization of backscattered photons are given for relatively small nonlinear parameter xi^2 (first order correction). All this is necessary for optimization of the conversion region at photon colliders and study of physics processes where a sharp edge of the luminosity spectrum and monochromaticity of collisions are important.Abstract The backward Compton scattering is a basic process at future higher energy photon colliders. To obtain a high probability of e→γ conversion the density of laser photons in the conversion region should be so high that simultaneous interaction of one electron with several laser photons is possible (nonlinear Compton effect). In this paper, a detailed consideration of energy spectra, helicities of final photons and electrons in nonlinear backward Compton scattering of circularly polarized laser photons is given. Distributions of γγ luminosities with total helicities 0 and 2 are investigated. Very high intensity of laser wave leads to broadening of the energy (luminosity) spectra and shift to lower energies (invariant masses). Beside complicated exact formulae, approximate formulae for energy spectrum and polarization of backscattered photons are given for relatively small nonlinear parameter ξ2 (first order correction). All this is necessary for optimization of the conversion region at photon colliders and study of physics processes, where a sharp edge of the luminosity spectrum and monochromaticity of collisions are important.


arXiv: High Energy Physics - Experiment | 2004

High-energy photon colliders

A.V. Pak; D.V. Pavluchenko; S.S. Petrosyan; V.G. Serbo; Valery I. Telnov

Methods of gamma-gamma, gamma-electron luminosities measurement at photon colliders based on Compton scattering of laser photons on high energy electrons at linear colliders are considered.Abstract Methods of γγ, γϵ luminosities measurement at photon colliders based on Compton scattering of laser photons on high energy electrons at linear colliders are considered. This is not a simple problem because photon have broad spectra and various kind of polarizations.


European Physical Journal A | 1992

Nonlinear effects in Compton scattering at photon colliders

S. E. Baru; A. E. Blinov; V. E. Blinov; A. Bondar; A. D. Bukin; V. R. Groshev; S. G. Klimenko; G.M. Kolachev; A. P. Onuchin; V. S. Panin; I. Ya. Protopopov; A. G. Shamov; V. Sidorov; Yu. I. Skovpen; A.N. Skrinsky; V.A. Tayursky; Valery I. Telnov; Yu. A. Tikhonov; G.M. Tumaikin; A. E. Undrus; A. I. Vorobiov; V. Zhilich

AbstractAnalyzing the data recorded with the MD-1 detector operated at the VEPP-4 storage ring we have determined the ϒ(1S) resonance leptonic partial width and mass. We find

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A. E. Blinov

Budker Institute of Nuclear Physics

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A. Bondar

Novosibirsk State University

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A. G. Shamov

Budker Institute of Nuclear Physics

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A. P. Onuchin

Budker Institute of Nuclear Physics

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V.A. Tayursky

Budker Institute of Nuclear Physics

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A. D. Bukin

Budker Institute of Nuclear Physics

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S. G. Klimenko

Budker Institute of Nuclear Physics

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V. S. Panin

Budker Institute of Nuclear Physics

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Yu. A. Tikhonov

Budker Institute of Nuclear Physics

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A. E. Undrus

Budker Institute of Nuclear Physics

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