A new atomic beam polarized ion source for the Triangle Universities Nuclear Laboratory: overview, operating experience, and performance

Clegg, T.B.; Karwowski, H. J.; Lemieux, S.K.; Sayer, R. W.; Crosson, E.R.; Hooke, W. M.; Howell, C. R.; Lewis, Howard B.; Lovette, A.W.; Pfutzner, H.J.; Sweeton, K.A.; Wilburn, W. S.

doi:10.1016/0168-9002(94)01078-1

Cited by 36 publications

(7 citation statements)

References 19 publications

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“…Ion sources: The JLEIC ion sources will rely on existing technologies: an Atomic Beam Polarized Ion Source (ABPIS) [328] with Resonant Charge Exchange Ionization for producing polarized light ions H − /D + and 3 He ++ , and an Electron Beam Ion Source (EBIS) similar to the one currently in operation at BNL [329] for producing unpolarized light to heavy ions.…”

Section: Ion Complexmentioning

confidence: 99%

Electron-Ion Collider: The next QCD frontier

et al. 2016

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Abstract. This White Paper presents the science case of an Electron-Ion Collider (EIC), focused on the structure and interactions of gluon-dominated matter, with the intent to articulate it to the broader nuclear science community. It was commissioned by the managements of Brookhaven National Laboratory (BNL) and Thomas Jefferson National Accelerator Facility (JLab) with the objective of presenting a summary of scientific opportunities and goals of the EIC as a follow-up to the 2007 NSAC Long Range plan. This document is a culmination of a community-wide effort in nuclear science following a series of workshops on EIC physics over the past decades and, in particular, the focused ten-week program on "Gluons and quark sea at high energies" at the Institute for Nuclear Theory in Fall 2010. It contains a brief description of a few golden physics measurements along with accelerator and detector concepts required to achieve them. It has been benefited profoundly from inputs by the users' communities of BNL and JLab. This White Paper offers the promise to propel the QCD science program in the US, established with the CEBAF accelerator at JLab and the RHIC collider at BNL, to the next QCD frontier. Preamble Editors' note for the second editionThe first edition of this White Paper was released in 2012. In the current (second) edition, the science case for the EIC is further sharpened in view of the recent data from BNL, CERN and JLab experiments and the lessons learnt from them. Additional improvements were made by taking into account suggestions from the larger nuclear physics community including those made at the EIC Users Group meeting at Stony Brook University in July 2014, and the QCD Town Meeting at Temple University in September 2014.Abhay Deshpande, Zein-Eddine Meziani and Jian-Wei Qiu November 2014 Editors' note for the third edition Since the 2nd release of this White Paper, the NSAC's Long Range Plan (2015) was successfully completed. The EIC is a major recommendation of the US nuclear science community. In the current release (version 3) we have fixed some minor remaining errors in the text, and have added a few new references. While the core science case for the EIC remains the same, the machine designs of both options, the eRHIC at BNL and the JLEIC at JLab keep evolving. In this 3rd release of the EIC White Paper instead of making substantial changes to the machine design sections (5.1 and 5.2), we give references to the most recent machine design documents.

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Section: Ion Complexmentioning

confidence: 99%

Electron-Ion Collider: The next QCD frontier

et al. 2016

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“…The measurements of A y were made utilizing the atomic beam polarized ion source at TUNL [62] via a two polarization state method [63] with fast state switching [64]. This polarized proton beam was accelerated to the desired energy with the tandem accelerator and tuned onto a gas-cell target inside the 62 cm diameter scattering chamber.…”

Section: B Analyzing Power Measurementsmentioning

confidence: 99%

Proton-He3elastic scattering at low energies

et al. 2006

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We present new accurate measurements of the differential cross section σ(θ) and the proton analyzing power Ay for proton-3 He elastic scattering at various energies. A supersonic gas jet target has been employed to obtain these low energy cross section measurements. The σ(θ) distributions have been measured at Ep = 0.99, 1.59, 2.24, 3.11, and 4.02 MeV. Full angular distributions of Ay have been measured at Ep = 1.60, 2.25, 3.13, and 4.05 MeV. This set of high-precision data is compared to four-body variational calculations employing realistic nucleon-nucleon (N N ) and threenucleon (3N ) interactions. For the unpolarized cross section the agreement between the theoretical calculation and data is good when a 3N potential is used. The comparison between the calculated and measured proton analyzing powers reveals discrepancies of approximately 50% at the maximum of each distribution. This is analogous to the existing "Ay Puzzle" known for the past 20 years in nucleon-deuteron elastic scattering.

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“…Polarized or unpolarized beams of 72-keV 1 H − ions were produced by the TUNL atomic beam polarized ion source [19]. These ions were then accelerated to 450 keV by the minitandem accelerator [20].…”

Section: A Low-energy Proton Beammentioning

confidence: 99%

“…Polarized beams of 72-keV 2 H − ions were produced using the same atomic-beam polarized ion source [19] used for protons. The beam was injected into the TUNL FN tandem accelerator, magnetically analyzed, and then delivered to a 62-cm diameter scattering chamber.…”

Section: B Deuteron Beammentioning

confidence: 99%

Proton-deuteron elastic scattering at low energies

et al. 2001

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We present measurements of differential cross sections and the analyzing powers Ay, iT11, T20, T21, and T22 at Ec.m. = 431.3 keV. In addition, an excitation function of iT11(θc.m. = 87.8• ) for 431.3 ≤ Ec.m. ≤ 2000 keV is presented. These data are compared to calculations employing realistic nucleon-nucleon interactions, both with and without three-nucleon forces. Excellent agreement with the tensor analyzing powers and cross section is found, while the Ay and iT11 data are found to be underpredicted by the calculations.13.75. Cs,21.45.+v,24.70.+s,

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A new atomic beam polarized ion source for the Triangle Universities Nuclear Laboratory: overview, operating experience, and performance

Cited by 36 publications

References 19 publications

Electron-Ion Collider: The next QCD frontier

Electron-Ion Collider: The next QCD frontier

Proton-He3elastic scattering at low energies

Proton-deuteron elastic scattering at low energies

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