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Measurements of a Three-Dimensional Field Distribution of
Measurements of a Three-Dimensional Field Distribution of
Abstract
Abstract
Graph_1
Graph_1
Cut of 1-SP-94-1В magnet in XOY plane
Cut of 1-SP-94-1В magnet in XOY plane
The Hall probe construction
The Hall probe construction
Graphics of Hall probe calibration (mV->Gs)
Graphics of Hall probe calibration (mV->Gs)
Graph_4
Graph_4
An error for y=1
An error for y=1
Graph
Graph
Graph_7 Dependence of main component of magnetic induction By(0, 0, z)
Graph_7 Dependence of main component of magnetic induction By(0, 0, z)
The median plane, y=0
The median plane, y=0
Graph
Graph
The z=0 plane
The z=0 plane
Fig_14а graphics of by=by(x=-0
Fig_14а graphics of by=by(x=-0
CONCLUSIONS
CONCLUSIONS
References 1. V. I. Sharov et al
References 1. V. I. Sharov et al

Презентация на тему: «Measurements of a Three-Dimensional Field Distribution of Spectrometric Magnet of "Delta-Sigma" Set-up for Spin Physics Experiments». Автор: german. Файл: «Measurements of a Three-Dimensional Field Distribution of Spectrometric Magnet of "Delta-Sigma" Set-up for Spin Physics Experiments.ppt». Размер zip-архива: 483 КБ.

Measurements of a Three-Dimensional Field Distribution of Spectrometric Magnet of "Delta-Sigma" Set-up for Spin Physics Experiments

содержание презентации «Measurements of a Three-Dimensional Field Distribution of Spectrometric Magnet of "Delta-Sigma" Set-up for Spin Physics Experiments.ppt»
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1 Measurements of a Three-Dimensional Field Distribution of

Measurements of a Three-Dimensional Field Distribution of

Spectrometric Magnet of "Delta-Sigma" Set-up for Spin Physics Experiments

DSPIN-2009, September 2, 2009, JINR, Dubna

I.P. Yudin, S.A. Dolgii, A.A. Morozov, G.P. Nikolaevsky, V.I. Sharov, R.A. Shindin, V.L. Smirnov, A.Yu. Starikov, L.N. Strunov

Joint Institute for Nuclear Research, Dubna 141980, Moscow region, Russia E-mail: yudin@jinr.ru

2 Abstract

Abstract

One of the main goals of the "Delta-Sigma-experiment" project is measurement of the energy behaviour of spin-dependent NN observables A00kk(np), A00nn(np) and Rdp in the GeV region of the neutron beam. These observables are determined by measurement of proton yields from the np > pn charge-exchange reaction at 0. using a magnetic spectrometer. Measurements of the magnetic field map of the spectrometer magnet providing high accuracy in determining the proton momentum were carried out. The "Delta-Sigma" set-up is placed at building 205 of the LHEP, JINR. The spectrometer magnet 2-SP-94-1V has the external sizes 2.95 x 2.12 x 1.62 m and aperture 0.30 x 0.13 m. A three-component Hall probe was used. The measurement volume is 0.34 x 0.07 x 2.18 m. A description of the measuring equipment, method and results is presented. The results are used for analysis of the physical data.

3 Graph_1

Graph_1

Schematic diagram of the Delta-Sigma setup: H2/D2 is the polarized liquid hydrogen (deuterium) target; SP-94 is the spectrometric magnet; SH is the pulsed hodoscope; A,S1,S2,S3 are the scintillation detectors; and Gx, Gy, 1x, 2x, 3x,y, 4x, y is the system of proportional chambers.

4 Cut of 1-SP-94-1В magnet in XOY plane

Cut of 1-SP-94-1В magnet in XOY plane

The general view of 1-SP-94-1B magnet

5 The Hall probe construction

The Hall probe construction

6 Graphics of Hall probe calibration (mV->Gs)

Graphics of Hall probe calibration (mV->Gs)

Пх 22

Пх 27

Пх 43

7 Graph_4

Graph_4

Measuring system (frame) and coordinate system in which measurements with respect to the magnet pole were performed.

8 An error for y=1

An error for y=1

5 T

An error for y=1.3 T

An error for y=0.75 T

An error for y=1.0 T

9 Graph

Graph

Graph

Graph

Graph

10 Graph_7 Dependence of main component of magnetic induction By(0, 0, z)

Graph_7 Dependence of main component of magnetic induction By(0, 0, z)

on longitudinal coordinate z at fixed x = 0 and y = 0 for different magnet winding current values.

11 The median plane, y=0

The median plane, y=0

The y=0.05 m plane

12 Graph

Graph

Graph

13 The z=0 plane

The z=0 plane

The z=0.6 m plane

14 Fig_14а graphics of by=by(x=-0

Fig_14а graphics of by=by(x=-0

15m, y=0.05m), bx=bx(x=-0.15m, y=0.05m), bz=bz(x=-0.15m, y=0.05m) as functions of longitudinal coordinate z.

15 CONCLUSIONS

CONCLUSIONS

Measurements of the magnetic field of the analyzing magnet 2-SP-94-1V of the Delta-Sigma setup in the spatial volume with dimensions 0.34 ? 0.07 ? 2.18 m were performed. A three-dimensional map of the distribution of all components of the magnetic field vector in this volume was obtained. The plots of characteristic distributions of field components on a level of 0.75, 1.00, 1.3, and 1.5 T were constructed. The measuring equipment and measurement procedure were described. The measurements were performed with an error of ?B/B ? 0.5% (?70 Gs on a level of 1.5 T at the center of the magnet) for the field region near the edges of the poles and ?B/B ? 0.1% (10 Gs on a level of 1.5 T at the center of the magnet) for the remaining measurement region. These results will be used to process the physical data obtained in the seanses of experiment. ACKNOWLEDGMENTS This work was supported by the Russian Foundation for Basic Research, project no. 07-02-01025a.

16 References 1. V. I. Sharov et al

References 1. V. I. Sharov et al

, “Measurements of the Total Cross- Section Difference ??L(np) at 1.39; 1.69; 1.89 and 1.99 GeV,” JINR Preprint E1-24-87 (Dubna, 2004); Yad. Fiz. 68, 1858 (2005) [Phys. At. Nucl. 68, 1796 (2005)]. 2. V. I. Sharov et al., Czech. J. Phys. B 54, 173–178 (2004). 3. V. I. Sharov et al., “Measurements of Energy Behaviours of Spin-Dependent np-Observables over a GeV Region, Dubna 'Delta–Sigma’ Experiment,” Eur. Phys. J. C 37, 79–90 (2004). 4. V. I. Sharov et al., “Measurements of Energy Behaviours of Spin-Dependent np-Observables over 1.2-3.7 GeV Energy Region, Dubna 'Delta-Sigma’ Exreriment,” in Relativistic Nuclear Physics: from Hundreds MeV to TeV (Dubna, 2006), pp. 118–129 [in Russian].

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