Abstract
Accelerator measurements and numerical simulation studies were undertaken in order to understand the luminosity performance of the Cornell Electron Storage Ring (CESR). Computer simulation predictions of luminosity near normal CESR operating conditions agreed quantitatively with measurements. The sensitivity of luminosity to such parameters as betatron tunes, chromaticities, and sextupole strength distribution was explored. The inclusion of single beam synchrobetatron coupling was necessary to achieve qualitative agreement between CESR and simulation data when the vertical betatron tune was lowered to near the vertical integer resonance. Results are interpreted within the framework of incoherent tune shift limitations by single two-dimensional coupling resonances.
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