Flavour Factory and Nuclear Physics Facility Based on Superconducting Linacs.

摘要

In December 1987 a Workshop was held in Courmayeur (Italy) on 'Heavy-Quark Factory and Nuclear-Physics Facility with Superconducting Linacs'. In this paper we summarized and update the main machine points discussed in detail in the Proceedings of the workshop. The 'SC radiofrequency complex' is a recirculated superconducting electron and positron linac which serves as a b/bar b/ factory and a high-duty cycle nuclear physics facility. It can provide electron-positron collisions in the c.m. energy range 10 less than or equal to W less than or equal to 20 GeV with luminosities L less than or equal to 10 sup 34 cm/sup /minus/2/ s/sup /minus/1/ and, at the same time, high intensity and large duty cycle electron beams for nuclear physics experiments up to about 10 GeV. The scheme consists of two racetrack linacs, each one being similar to the CEBAF design. It offers also the possibility of producing c/bar c/ (quarks) for 3 less than or equal to W less than or equal to 4 GeV with L > 10 sup 32 cm/sup /minus/2/ s/sup /minus/1/ and of colliding 2.5 GeV positrons (extracted from the damping ring) with 11.2 GeV electrons, so as to produce moving UPSILON(4S) states and have an easier access to the study of CP violation. For nuclear physics the CW beam has a current less than or equal to 200 mu A and a duty cycle greater than or equal to 80%. 12 refs., 3 figs., 1 tab. (ERA citation 14:004944)