The magnetic system of NSLS II Booster is designed, manufactured and tested in BINP, Russia. The dipoles of the Booster have quadrupole and sextupole components and should create high quality of field of ± 2·10 -4 in region of ± 2 cm. The magnets should provide performance of the booster for energy from 170 MeV to 3.15 GeV with a 2 Hz frequency. This report considers ramping magnetic measurements of NSLS-II Booster Dipoles.

Booster (rocketry)

Quadrupole magnet

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Measurement of R between 1.84 and 3.05 GeV at the KEDR detector

Physics Letters B (2017)

В.В. Анашин V.M. Aulchenko E. M. Baldin A.K. Barladyan A. Barnyakov

Using the KEDR detector at the VEPP-4M $e^+e^-$ collider, we have determined the values of $R$ at thirteen points of the center-of-mass energy between 1.84 and 3.05 GeV. The achieved accuracy is about or better than $3.9\%$ at most of the energy points with a systematic uncertainty less than $2.4\%$.

10.1016/j.physletb.2017.04.073

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Measurement of Γee(J/ψ)⋅B(J/ψ…

Physics Letters B (2010)

В.В. Анашин V.M. Aulchenko E. M. Baldin A.K. Barladyan A. Barnyakov

The products of the electron width of the J/\psi meson and the branching fraction of its decays to the lepton pairs were measured using data from the KEDR experiment at the VEPP-4M electron-positron collider. The results are \Gamma_{ee}(J/\psi)*Br(J/\psi->e^+e^-)=(0.3323\pm0.0064\pm0.0048) keV, \Gamma_{ee}(J/\psi)*Br(J/\psi->\mu^+\mu^-)=(0.3318\pm0.0052\pm0.0063) keV. Their combinations \Gamma_{ee}\times(\Gamma_{ee}+\Gamma_{\mu\mu})/\Gamma=(0.6641\pm0.0082\pm0.0100) keV, \Gamma_{ee}/\Gamma_{\mu\mu}=1.002\pm0.021\pm0.013 can be used to improve theaccuracy of the leptonic and full widths and test leptonic universality. Assuming e\mu universality and using the world average value of the lepton branching fraction, we also determine the leptonic \Gamma_{ll}=5.59\pm0.12 keV and total \Gamma=94.1\pm2.7 keV widths of the J/\psi meson.

Branching fraction

10.1016/j.physletb.2010.01.057

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Measurements of the tensor analyzing power T20 of the reaction γd → dπ0

International Journal of Modern Physics E (2020)

V. V. Gauzshtein M. I. Levchuk A. Loginov D. M. Nikolenko I. A. Rachek

The paper presents the results of measurements of the tensor analyzing power component [Formula: see text] for the coherent neutral pion photoproduction on the deuteron. The measurements were performed in the Budker Institute of Nuclear Physics using the internal tensor polarized deuterium target at VEPP-3 storage ring. The measurements covered the region of the photon energy 240 — 420[Formula: see text]MeV and the region of the center-of-mass pion polar angle 100–140[Formula: see text]. The results of measurements were compared with the calculations performed within frameworks of several theoretical models.

10.1142/s0218301320500111

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Nsls-II Boster

Physics Procedia (2016)

S. M. Gurov Alexander V. Akimov V.E. Akimov В.В. Анашин О. В. Анчугов

The National Synchrotron Light Source II is a third generation light source, which was constructed at Brookhaven National Laboratory. This project includes a highly-optimized 3 GeV electron storage ring, linac preinjector, and full-energy synchrotron injector. Budker Institute of Nuclear Physics built and delivered the booster for NSLS-II. The commissioning of the booster was successfully completed. This paper reviews fulfilled work by participants.

National laboratory

Booster (rocketry)

Synchrotron light source

10.1016/j.phpro.2016.11.013

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Final analysis of KEDR data onJ/ψandψ(2S)masses

Physics Letters B (2015)

В.В. Анашин V.M. Aulchenko E. M. Baldin A.K. Barladyan A. Barnyakov

We present the analysis of all KEDR data on the determination of J/ψ and ψ(2S) masses. The data comprise six scans of J/ψ and seven scans of ψ(2S) which were performed at the VEPP-4M e+e− collider in 2002–2008. The beam energy was determined using the resonance depolarization method. The detector and accelerator conditions during scans were very different that increases the reliability of the averaged results. The analysis accounts for partial correlations of systematic uncertainties on the masses. The following mass values were obtained:MJ/ψ=3096.900±0.002±0.006 MeV,Mψ(2S)=3686.099±0.004±0.009 MeV. These results supersede our previous measurements published in 2003 and 2012.

10.1016/j.physletb.2015.07.057

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Citations (27)

Measurement of $$J/\psi $$ decays into final states $$2(\pi ^{+}\pi ^{-})\pi ^{0},K^{+}K^{-}\pi ^{+}\pi ^{-}\pi ^{0},\,2(\pi ^{+}\pi ^{-})$$ and $$K^{+}K^{-}\pi ^{+}\pi ^{-}$$

The European Physical Journal C (2022)

В.В. Анашин О. В. Анчугов V.M. Aulchenko E. M. Baldin G. N. Baranov

Abstract Using the 1.32 $$\hbox {pb}^{-1}$$ pb - 1 statistics collected at the $$J/\psi $$ J / ψ peak with the KEDR detector at the VEPP-4M $$e^{+}e^{-\, }$$ e + e - collider, we measured the branching fractions of $$J/\psi $$ J / ψ meson decays to the final states 2( $$\pi ^{+}\pi ^{-})\pi ^{0}$$ π + π - ) π 0 , $$K^{+}K^{-}\pi ^{+}\pi ^{-}\pi ^{0}$$ K + K - π + π - π 0 , 2( $$\pi ^{+}\pi ^{-})$$ π + π - ) and $$K^{+}K^{-}\pi ^{+}\pi ^{-}$$ K + K - π + π - . The results obtained for the decays $$J/\psi \rightarrow $$ J / ψ → 2( $$\pi ^{+}\pi ^{-})\pi ^{0}$$ π + π - ) π 0 , $$J/\psi \rightarrow K^{+}K^{-}\pi ^{+}\pi ^{-}\pi ^{0}$$ J / ψ → K + K - π + π - π 0 contradict the measurements performed by other groups in the last century, but agree well with recent results of BABAR and BESIII collaborations.

10.1140/epjc/s10052-022-10879-9

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Integer spin resonance crossing at VEPP-4M with conservation of beam polarization

arXiv (Cornell University) (2015)

A.K. Barladyan A. Barnyakov А. Н. Журавлев E. Levichev A.G. Shamov

A recently proposed method to preserve the electron beam polarization at the VEPP-4M collider during acceleration with crossing the integer spin resonance energy E=1763 MeV has been successfully applied. It is based on full decompensation of $ 0.6\times3.3$ Tesla$\times$meter integral of the KEDR detector longitudinal magnetic field due to s 'switched-off' state of the anti-solenoids.

Level crossing

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Measurement of the Field Map in Pulsed Bending Accelerating Magnets Using Hall Probes

Instruments and Experimental Techniques (2024)

К. С. Штро A. M. Batrakov Igor Ilyin I.N. Okunev А. В. Павленко

Hall effect sensor

10.1134/s0020441224700593

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