Status of the polarized ions source for the JINR accelerator complex

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

doi:10.1134/s1063779614010298

Cited by 5 publications

(10 citation statements)

References 3 publications

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“…Efficiency of HFT was determined by placing a HFT between the assembly of permanent sextupole magnets and electromagnet sextupole and measuring the respective decrease of density of polarized atomic beam. Efficiencies of WFT and MFT for deuterium were determined from these measurements close to be 0.950.03 [6]. The plasma ionizer has been tested at the JINR test-bench initially without a storage cell.…”

Section: Tests Of the Sourcementioning

confidence: 92%

“…The source has been described in more detail in [6]. Atomic hydrogen (or deuterium for production of polarized deuterons) is produced in the source using an RF discharge dissociator.…”

Section: General Description Of the Source Of Polarized Ionsmentioning

confidence: 99%

“…For hydrogen atoms alternate turning on of WFT (1  3) and SFT (2  4) will lead to switching between theoretical values of proton vector polarization -1 and +1. For polarized deuterium use of MFT, WFT and SFT will allow switching deuteron vector polarization between +1 and -1 and tensor polarization between +1 and -2 [5,6].…”

Section: General Description Of the Source Of Polarized Ionsmentioning

confidence: 99%

“…The atomic beam section (ABS) has been tested at INR RAS [6]. Intensity of the polarized atomic beam 50 cm downstream the sextupole electromagnet was measured with the time-of-flight mass-spectrometer and found to be 1.5 10 17 sec -1 cm -2 .…”

Section: Tests Of the Sourcementioning

confidence: 99%

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Development of polarized ion source for the JINR accelerator complex

Fimushkin

Kovalenko

Kutuzova

et al. 2016

J. Phys.: Conf. Ser.

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Abstract. Status of the JINR polarized ion source development is described. The source is under tests at the test-bench of LHEP, JINR. A charge-exchange plasma ionizer has been tested initially without a storage cell in the ionization region. An unpolarized deuterium ion beam with peak current of 160 mA, 23 keV energy, pulse duration of 100 s and repetition rate of 1 Hz has been extracted from the ionizer. With a free polarized atomic hydrogen beam injected into the ionizer a polarized proton beam with peak current of 1.4 mA has been obtained. The nearest plans for the source development include tests of the ionizer with the storage cell and tuning of the high frequency transition units installed in their operating position with a Breit-Rabi polarimeter.

show abstract

Section: Tests Of the Sourcementioning

confidence: 92%

“…The source has been described in more detail in [6]. Atomic hydrogen (or deuterium for production of polarized deuterons) is produced in the source using an RF discharge dissociator.…”

Section: General Description Of the Source Of Polarized Ionsmentioning

confidence: 99%

Section: General Description Of the Source Of Polarized Ionsmentioning

confidence: 99%

Section: Tests Of the Sourcementioning

confidence: 99%

See 2 more Smart Citations

Development of polarized ion source for the JINR accelerator complex

Fimushkin

Kovalenko

Kutuzova

et al. 2016

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…For hydrogen atoms alternate turning on of the WFT (1  3) and the SFT (2  4) will lead theoretical values of proton vector polarization of -1 or +1, respectively. We have used MFT, WFT and SFT for polarized deuterium that will provide deuteron vector polarization between +1 and -1 and tensor polarization between +1 and -2 [5,6]. Many other deuteron polarization states can be produced by using different combinations of the HFT.…”

Section: Atomic Beam Apparatusmentioning

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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Transition of polarized ions through the system of ring permanent magnets

Fimushkin¹,

Gapienko²,

Plis³

et al. 2016

J. Phys.: Conf. Ser.

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Abstract. The task of the transportation of the polarized proton and deuteron beam of an energy 10-20 keV in the given magnetic field is considered. Specifically the magnetic field is produced by the system of a solenoid and some ring permanent magnets with contrary directed field. The Lorentz equations together with classic equations for vector and tensor polarizations have been solved. The results of the numerical simulation for a simple tworing system are presented, which shows there is no essential depolarization in agrement with theoretical estimation.The problem of transporting a polarized deuteron beam [1] with an energy of 10-20 keV in the magnetic field altering in direction and magnitude is considered. In the particular case of the polarized ion source, we have the system of a solenoid and two ring permanent magnets with counter fields (Fig. 1).We choose the coordinate system with the origin at the center of the ring system, the axis x is along the direction of motion of the deuteron beam and the axis z is in the vertical direction. For paraxial trajectories the radial magnetic field is calculated as usual:So, the field on the axis of the solenoid iswhere µ 0 = 4π10 −7 N/A 2 , x 1 = x + L -the distance from the point of measuring to the proximal end of the solenoid, L -the distance from the origin to the proximal end of the solenoid, x 2 = x + L + l -the distance from the point of measuring to the distal end of the solenoid, l -the length of the solenoid, r 1 -the inner radius of the solenoid, r 2 -the outer radius, n -the number of turns per unit of length of the solenoid, I -the solenoid current. The magnetic field on the axis of the annular permanent magnet is calculated as the difference of the field values of two solid cylinders. For a cylinder with magnetization M = B 0 /µ 0 (B 0 -the residual field) the axial field in the function of the distance t from the center of the magnet can be calculated by:where a and 2b -the radius and length of the cylinder.

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Status of the polarized ions source for the JINR accelerator complex

Cited by 5 publications

References 3 publications

Development of polarized ion source for the JINR accelerator complex

Development of polarized ion source for the JINR accelerator complex

Source of polarized ions and polarized beams at the NUCLOTRON

Transition of polarized ions through the system of ring permanent magnets

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