Polarization transport at TJNAF: Simulations and measurements
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606 (United States)
Polarized beam commissioning has been initiated at TJNAF. Measuring the polarization properties of the accelerator, which consists of two superconducting linacs and more than 2200 magnetic elements at its maximum energy, provide useful information about the beam energy and beam transport through the accelerator. Stability of the output beam polarization depends upon time-dependent orbit and energy oscillations. Modeling indicates that the spin transport dynamics are sensitive ({approx}10{sup -2}) to vertical betatron oscillations in the recirculation arcs. This sensitivity is calculated to be enhanced in the arcs where the spin tune is most nearly matched to the vertical betatron tune. Modeling also suggests that depolarization phenomena associated with the particle trajectory differences for electrons within the accelerator's nominal transverse phase volume are too small to be measured between the injector and an experimental hall. Preliminary results from measurements obtained during polarization development runs will be presented.
- OSTI ID:
- 21182459
- Journal Information:
- AIP Conference Proceedings, Vol. 421, Issue 1; Conference: 7. international workshop on polarized gas targets and polarized beams, Urbana, IL (United States), 18-22 Aug 1997; Other Information: DOI: 10.1063/1.54971; (c) 1998 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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