An alternative lattice design for a compact light source ring

Abstract

A 26 meter circumference 1.5 GeV electron storage ring, designed to deliver X-rays with a critical energy of 10.4 keV, and has been proposed for the UCLA campus. This ring has twelve 6.9 T superconducting dipoles grouped in pairs. Each pair bends the beam sixty degrees. The quadrupoles and sextupoles are conventional. The alternative ring design presented in this report would have twelve separate 6.9 T superconducting dipoles that bend the beam thirty degrees each. Although this ring would have a larger circumference (about 36 meters) and more focusing elements, it would have a smaller emittance and consequently it would be a brighter source of X-rays. As with the smaller ring, the focusing elements would be conventional. The X-ray power from the alternative ring delivered to the users is expected to be much higher than that from the smaller ring.