Development of polarized ion source for the JINR accelerator complex

Fimushkin, V. V.; Kovalenko, A. D.; Kutuzova, L. V.; Prokofichev, Yu. V.; Shutov, B; Белов, А. С.; Zubets, V.; Turbabin, A. V.

doi:10.1088/1742-6596/678/1/012058

Cited by 22 publications

(34 citation statements)

References 4 publications

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“…The A y , A yy , A xx analyzing powers of the dp elastic scattering and vector and tensor polarizations of the deuteron beam from the SPI [7] have been successfully obtained using the designed express-offline software in the ROOT scripts form. The first measurements of the 500 MeV proton beam polarization were performed during 54 th run also.…”

Section: Discussionmentioning

confidence: 99%

“…The Deuteron Spin Structure (DSS) setup [1], [2], [3], [4] placed at the Nuclotron Internal Target Station (ITS) [5] studies the polarization observables in the dp elastic scattering for a several years [6]. Vector and tensor polarizations of the deuteron and proton beams from the LHEP-JINR polarized ions source (SPI) [7], as well as A y , A yy , A xx analyzing powers of the reactions have been successfully measured in the beam energy range from 135 MeV/nucleon to 900 MeV/nucleon. These measurements were done using the VME-based data acquisition (DAQ) system which will be described in present paper.…”

Section: Introductionmentioning

confidence: 99%

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Online polarimetry of the Nuclotron internal deuteron and proton beams

Isupov

2017

J. Phys.: Conf. Ser.

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Abstract. The spin studies at Nuclotron require fast and precise determination of the deuteron and proton beam polarization. For these purposes new powerful VME-based data acquisition (DAQ) system has been designed for the Deuteron Spin Structure setup placed at the Nuclotron Internal Target Station. The DAQ system is built using the netgraph-based data acquisition and processing framework ngdp. The software dealing with VME hardware is a set of netgraph nodes in form of the loadable kernel modules, so works in the operating system kernel context. The specific for current implementation nodes and user context utilities are described. The online events representation by ROOT classes allows us to generalize code for histograms filling and polarization calculations. The DAQ system was successfully used during 53 rd and 54 th Nuclotron runs, and their suitability for online polarimetry is demonstrated.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Online polarimetry of the Nuclotron internal deuteron and proton beams

Isupov

2017

J. Phys.: Conf. Ser.

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“…After testing of the SPI with the free polarized atomic deuterium beam in the plasma ionizer described in [7], the storage cell has been installed into the plasma ionizer. The storage cell provides increasing the polarized atoms density in the charge-exchange region by one order of the magnitude in comparison with the free polarized atomic beam.…”

Section: Tests Of the Ionizer With The Storage Cellmentioning

confidence: 99%

Source of polarized ions and polarized beams at the NUCLOTRON

Fimushkin¹,

Kovalenko²,

Kuzyakin³

et al. 2018

Proceedings of XVII International Workshop on Polarized Sources, Targets &Amp; Polarimetry — PoS(PSTP2017)

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The paper describes the JINR polarized ion source operating by means of the atomic beam method. The results of testing of the plasma ionizer with a storage cell and tuning of high frequency transition units are presented. The source was installed in the linac injector hall of the NUCLOTRON in May 2016. The source was commissioned and used in the NUCLOTRON runs in 2016 and February -March 2017. Polarized and unpolarized deuteron beams as well as polarized proton beam were produced to accelerate in the NUCLOTRON. The polarized deuteron beam with pulsed current up to 3.7 mA has been produced. Deuteron beam polarization of 0.6-0.9 of theoretical values for different modes of high frequency transition units has been measured with the NUCLOTRON ring internal polarimeter for the accelerated deuteron and proton beams.

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“…The upgraded setup at ITS has been used to measure the vector A y and tensor A yy and A xx analyzing powers in dp-elastic scattering between 400 MeV and 1800 MeV using polarized deuteron beam from new source of polarized ions (SPI) developed at LHEP-JINR [20]. These measurements were performed using internal target station at Nuclotron [10] with new control and data acquisition system [21].…”

Section: Experimental Setup At Itsmentioning

confidence: 99%

“…3. Measurements of the analyzing power in dp-elastic scattering New SPI [20] has been used to provide polarized deuteron beam. In the current experiment the spin modes with the maximal ideal values of (P z ,P zz )= (0,0), (-1/3,+1) and (-1/3, +1) were used.…”

Section: Experimental Setup At Itsmentioning

confidence: 99%

First results on the energy scan of the vectorA_yand tensorA_yyandA_xxanalyzing powers in deuteron-proton elastic scattering at Nuclotron¹

Ladygin¹,

Averyanov²,

Chernykh³

et al. 2017

J. Phys.: Conf. Ser.

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These data have been obtained in 2016-2017 at DSS setup at internal target station using polarized deuteron beam from new source of polarized ions. The preliminary data on the deuteron analyzing powers in in the wide energy range demonstrate the sensitivity to the shortrange spin structure of the nucleon-nucleon correlations. IntroductionOne of the tools to investigate the equation-of-state (EOS) of dense nuclear matter is the study of the short range correlations (SRC) of nucleons in nuclei which is the subject of intensive theoretical and experimental works during last years. Since SRC have densities comparable to the density in the center of a nucleon which is about ρ ∼ 5ρ 0 (ρ 0 ≈ 0.17 fm −3 ), they can be considered as the drops of cold dense nuclear matter [1]. These studies explore a new part of the phase diagram and very essential to understand the evolution of neutron stars.The results obtained at BNL [2], SLAC [3] and JLAB [4,5] clearly demonstrate that more than 90% all nucleons with momenta k ≥ 300 MeV/c belong to 2N SRC; the probability for a given proton with momenta 300 ≤ k ≤ 600 MeV/c to belong to pn correlation is ∼18 times larger than for pp correlations; the probability for a nucleon to have momentum ≥ 300 MeV/c in medium nuclei is ∼25%; 3N SRC are present in nuclei with a significant probability [6]. However, still many open questions persist and further investigations are required both from the experimental and theoretical sides. For instance, the experimental data on the spin structure of 2N (I=1) and 3N SRC are almost absent.

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Development of polarized ion source for the JINR accelerator complex

Cited by 22 publications

References 4 publications

Online polarimetry of the Nuclotron internal deuteron and proton beams

Online polarimetry of the Nuclotron internal deuteron and proton beams

Source of polarized ions and polarized beams at the NUCLOTRON

First results on the energy scan of the vectorA_yand tensorA_yyandA_xxanalyzing powers in deuteron-proton elastic scattering at Nuclotron¹

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Development of polarized ion source for the JINR accelerator complex

Cited by 22 publications

References 4 publications

Online polarimetry of the Nuclotron internal deuteron and proton beams

Online polarimetry of the Nuclotron internal deuteron and proton beams

Source of polarized ions and polarized beams at the NUCLOTRON

First results on the energy scan of the vectorAyand tensorAyyandAxxanalyzing powers in deuteron-proton elastic scattering at Nuclotron1

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First results on the energy scan of the vectorA_yand tensorA_yyandA_xxanalyzing powers in deuteron-proton elastic scattering at Nuclotron¹