Spin-dependent scattering of polarized protons from a polarized 3He internal gas target

C. Bloch, J. Doskow, C. D. Goodman, W. W. Jacobs, M. Leuschner, H. O. Meyer, B. von Przewoski, T. Rinckel, G. Savopulos, A. Smith, J. Sowinski, F. Sperisen, W. K. Pitts, D. DeSchepper, R. Ent, J. O. Hansen, J. Kelsey, W. Korsch, L. H. Kramer, K. LeeN. C.R. Makins, R. G. Milner, S. F. Pate, C. Tschalär, T. P. Welch, D. Marchlenski, E. Sugarbaker, W. Lorenzon, P. V. Pancella, J. F.J. van den Brand, H. J. Bulten, C. E. Jones, M. A. Miller, J. Neal, O. Unal, Z. L. Zhou

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


We describe the first experiment to use a polarized internal gas target and polarized beam in a storage ring. A laser optically pumped polarized 3He internal gas target has been used with circulating beams of 197-414 MeV polarized protons to carry out an extensive set of measurements of spin dependent scattering. A large acceptance non-magnetic detector system consisting of wire-chambers, scintillators and microstrip detectors was used to detect protons, neutrons, deuterons, and 3He nuclei from the beam-target interaction. It is demonstrated that these techniques result in low backgrounds (< 1%) due to scattering from species other than the polarized target gas and allow detection of low energy recoiling nuclei. Specific issues such as interfacing the experiment to the storage ring and monitoring the luminosity and polarizations are discussed in detail.

Original languageEnglish
Pages (from-to)437-457
Number of pages21
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number2-3
StatePublished - Jan 30 1995

Bibliographical note

Funding Information:
This work is supportedi n part by the National Science Foundation under Grants no. PHY-9015957 (IUCF), PHY-9019983( Madison), PHY-9018242 (Ohio State) and the NSF Research Opportunity Award Program (Louisville and W. Michigan) and by the Departmento f Energy under Contract no. W-31-109-ENG-38 (ANL) and DE-AC02-76ER03069 (MIT). RGM acknowledges a Presidential Young InvestigatorA ward from the NSF.

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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