Radiative polarization in high-energy storage rings

Conference · Wed Mar 01 00:00:00 EST 1989

OSTI ID:6233991

Mane, S R

Electron and positron beams circulating in high-energy storage rings become spontaneously polarized by the emission of synchrotron radiation. The asymptotic degree of polarization that can be attained is strongly affected by so-called depolarizing resonances. Detailed experimental measurements of the polarization were made SPEAR about ten years ago, but due to lack of a suitable theory only a limited theoretical fit to the data has so far been achieved. I present a general formalism for calculating depolarizing resonances, which as been coded into a computer program called SMILE, and use it to fit the SPEAR data. By the use of suitable approximations, I am able to fit both higher order and nonlinear resonances, and thereby to interpret many hitherto unexplained features in the data, and to resolve a puzzle concerning the asymmetry of certain resonance widths seen in the data. 18 refs., 2 figs.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• DOE Contract Number: AC02-76CH03000
• OSTI ID: 6233991
• Report Number(s): FNAL/C-89/79; CONF-890335-95; ON: DE89011458; TRN: 89-012850
• Resource Relation: Conference: 13. particle accelerator conference, Chicago, IL, USA, 20 Mar 1989; Other Information: Paper copy only, copy does not permit microfiche production
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ELECTRON BEAMS
POLARIZATION
POSITRON BEAMS
ALGORITHMS
EQUATIONS OF MOTION
POLARIZED BEAMS
STORAGE RINGS
SYNCHROTRON RADIATION
BEAMS
BREMSSTRAHLUNG
DIFFERENTIAL EQUATIONS
ELECTROMAGNETIC RADIATION
EQUATIONS
LEPTON BEAMS
MATHEMATICAL LOGIC
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLE BEAMS
RADIATIONS
430200* - Particle Accelerators- Beam Dynamics
Field Calculations
& Ion Optics