A polarized 3He ion source for electrostatic accelerators

Slobodrian, R.J.; Rioux, C.; Giroux, Jean‐François; Roy, R.

doi:10.1016/0168-9002(86)90753-9

Cited by 5 publications

(43 citation statements)

References 10 publications

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“…We estimate that using that source instead of ours the atomic flux available in the interaction region would have been about two orders of magnitude smaller, mainly because a focussing element is absent in that beam line. Another polarized-beam system is that of Slobodrian et al [7]. Their source is aimed at producing polarized 3He ions for nuclear physics experiments.…”

Section: Comparison With Other Polarized Beam Sourcesmentioning

confidence: 99%

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Production of a spin-polarized, metastable He(23 S) beam for studies in atomic and surface physics

Baum

Raith

Steidl

1988

Z Phys D - Atoms, Molecules and Clusters

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This beam was developed as a target for a crossed-beam electron-atom scattering experiment on the interaction of a polarized spin-½ electron with a polarized spin-1 atom. In the future this beam will be used in "Spin-Polarized Metastable Atom Deexcitation Spectroscopy" (SPMDS) for studying ferromagnetic surfaces without and with adsorbate layers. We use a discharge source for producing a beam of metastable helium atoms, a permanent sextupole magnet with a central stop at its exit for selecting He(23S) atoms in the Zeeman substate ms= + 1, a zero-field spin flipper for reversing the atomic beam polarization with respect to a magnetic guiding field, and a Stern-Gerlach magnet for analyzing the atomic polarization. At a distance of 90 cm beyond the exit of the sextupole, in the "interaction region" of an experiment, the polarized beam has a circular cross section of about 6 mm FWHM and a particle density of 1.10 v atoms/cm 3. The reversible spin polarization was determined as P=0.90+0.02. A possible contamination of the beam with metastable singlet atoms is included within this value; the ground-state He atoms are not considered to be part of the polarized beam. An observed contamination with long-lived Rydberg atoms can easily be destroyed by applying a high electric field.

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Section: Comparison With Other Polarized Beam Sourcesmentioning

confidence: 99%

“…The design of the permanent sextupole magnet was mainly based on the work of Kramer [3] and our own extensive experience with such devices [4][5][6]. Independent of this work Slobodrian et al [7] employed similar techniques to produce a polarized 3He ion beam for nuclear physics experiments.…”

Section: Introductionmentioning

confidence: 99%

Production of a spin-polarized, metastable He(23 S) beam for studies in atomic and surface physics

Baum

Raith

Steidl

1988

Z Phys D - Atoms, Molecules and Clusters

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“…Polarized proton beams are regularly accelerated at RHIC; however, the neutral charge of the neutron prevents its use in an accelerator. The 3 He nucleus has an 88.6% probability of being in its spatially symmetric S-state, where the protons form a singlet and the neutron carries the nuclear spin. This makes 3 He a viable surrogate for a polarized neutron beam.…”

Section: Introductionmentioning

confidence: 99%

“…The 3 He nucleus has an 88.6% probability of being in its spatially symmetric S-state, where the protons form a singlet and the neutron carries the nuclear spin. This makes 3 He a viable surrogate for a polarized neutron beam. Polarized 3 He ion sources have been developed in the past [1,2,3], but an EIC will require a much higher intensity and polarization than previously achieved to reach its physics goals.…”

Section: Introductionmentioning

confidence: 99%

“…This makes 3 He a viable surrogate for a polarized neutron beam. Polarized 3 He ion sources have been developed in the past [1,2,3], but an EIC will require a much higher intensity and polarization than previously achieved to reach its physics goals. For this reason, development of a polarized 3 He ion beam has been identified as an R&D priority for the EIC [4,5], and the BNL-MIT polarized 3 He ion source collaboration has pursued this R&D [6,7,8,9,10].…”

Section: Introductionmentioning

confidence: 99%

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Polarized 3He++ Ion Source for RHIC and an EIC

Musgrave¹,

Milner²,

Атоян³

et al. 2018

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

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The capability of accelerating a polarized 3 He ion beam in RHIC would demonstrate an effective polarized neutron beam for the study of new high-energy QCD studies of nucleon structure. This development would be particularly beneficial for the future plans of an Electron Ion Collider (EIC), which could use a polarized 3 He ion beam to probe the spin structure of the neutron. The proposed polarized 3 He ion source is based on the Electron Beam Ion Source (EBIS) currently in operation at Brookhaven National Laboratory (BNL). 3 He gas would be polarized within the 5 T field of the EBIS solenoid via Metastability Exchange Optical Pumping (MEOP) and then pulsed into the EBIS vacuum and drift tube system where the 3 He will be ionized by the 10 Amp electron beam. The goal of the polarized 3 He ion source is to achieve 2.5 × 10 11 3 He ++ /pulse at 70% polarization. An upgrade of the EBIS is currently underway at BNL. The EBIS capability to produce polarized 3 He ++ is being developed through a collaboration between BNL and MIT.

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State Selection

Pauly¹

2000

Atom, Molecule, and Cluster Beams II

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A polarized 3He ion source for electrostatic accelerators

Cited by 5 publications

References 10 publications

Production of a spin-polarized, metastable He(23 S) beam for studies in atomic and surface physics

Production of a spin-polarized, metastable He(23 S) beam for studies in atomic and surface physics

Polarized 3He++ Ion Source for RHIC and an EIC

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