Abstract
One of the basic tasks of the Delta-Sigma Experiment project is to measure the energy dependences in the GeV region of the neutron beam of spin dependent NN observables A 00kk (np), A 00nn (np), and R dp . These observables are determined by measuring proton yields in the charge-exchange reaction np → pn at an angle of 0° using the magnetic spectrometer of the Delta-Sigma setup. The magnetic field map of the analyzing magnet of the setup spectrometer was measured in order to precisely determine the charge exchange proton momenta. The Delta-Sigma setup is situated in building 205 of the Laboratory of High Energies of the Joint Institute for Nuclear Research. The spectrometer magnet 2-SP-94 in 1V channel has external dimensions of 2.95 × 2.12 × 1.62 m and an aperture (occupied by the beam) of 0.30 × 0.09 m. A three-component Hall probe was used to measure the magnetic field. The volume of measurements was 0.33 × 0.0645 × 1.02 m. In this paper, the measuring equipment, measurement procedure, and results used in processing and analyzing the physical data obtained are described.
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Original Russian Text © I.P. Yudin, D.K. Gur’ev, S.A. Dolgii, A.Ya. Kutov, V.M. Lutsenko, A.A. Morozov, G.P. Nikolaevskii, A.A. Nomofilov, N.S. Rossiyskaya, A.Yu. Starikov, L.N. Strunov, V.I. Sharov, R.A. Shindin, S.N. Shkarovskii, 2009, published in Pis’ma v Zhurnal Fizika Elementarnykh Chastits i Atomnogo Yadra, 2009, No. 2 (150), pp. 233–242.
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Yudin, I.P., Gur’ev, D.K., Dolgii, S.A. et al. Measurements of the magnetic field map of the analyzing magnet of the Delta-Sigma setup spectrometer. Phys. Part. Nuclei Lett. 6, 145–150 (2009). https://doi.org/10.1134/S1547477109020071
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DOI: https://doi.org/10.1134/S1547477109020071