Beam Energy Determination from Spin Precession Measurements at JLAB
The extraction of structure information from electron scattering experiments requires a knowledge of the absolute energy of the incoming beam. Some experiments, for example those which attempt to separate the longitudinal and transverse response of the target, would benefit from a determination of this quantity at a level of a few parts in 10,000 (1{sup -4}). To this end several experimental techniques have been proposed and implemented. These techniques can be roughly split into two broad classes; magnetic and kinematic. The magnetic measurements are based on measuring the deflection of the beam in a magnet or string of magnets of known absolute field integral. The kinematic methods rely on the reconstruction of the beam energy from measurements in scattering experiments. A third technique, based on measurements of spin precession of a polarized beam, has been suggested and a partial analysis of its errors has been presented by Ulmer. This paper expands upon that analysis.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 841135
- Report Number(s):
- JLAB-ACC-99-25; DOE/ER/40150-3461; TRN: US0502346
- Resource Relation:
- Other Information: No journal information given for this preprint; PBD: 1 Jun 1999
- Country of Publication:
- United States
- Language:
- English
Similar Records
Experimental Study of the 3He and Neutron Spin Structure at Low Q2 and The Upgrade of the JLab Polarized 3He Target
Measurements of and : Probing the neutron spin structure