We report on an experimental demonstration of electron cooling of high-energy antiprotons circulating in a storage ring. In our experiments, electron cooling, a well-established method at low energies (< 500 MeV/nucleon), was carried out in a new region of beam parameters, requiring a multi-MeV dc electron beam and an unusual beam transport line. In this letter we present the results of the longitudinal cooling force measurements and compare them with theoretical predictions.
The purpose of this paper is to review the literature relative to church-based health promotion programs to assist health professionals in establishing effective prevention alliances with African-American churches. While the literature describing the role of churches, particularly African-American, is limited, the available evidence supports the assertion that many churches are engaged in providing primary prevention, preventive health, and social services to at risk populations. Two mini-cases, illustrative of programs which have been reported in the literature, are presented. What each program had in common is an alliance between ministers, health professionals, and trained church volunteers. Pastors acted as gatekeepers and advocates for a health program. The health professionals served as consultants (particularly in technical design, training, and evaluation). Interested church members, once trained, conducted health programs serving themselves, fellow members, and their community.
Abstract. The 8.9-GeV/c Recycler antiproton storage ring is equipped with both stochastic and electron cooling systems. These cooling systems are designed to assist accumulation of antiprotons for the Tevatron collider operations. In this paper we report on an experimental demonstration of electron cooling of high-energy antiprotons. At the time of writing this report, the Recycler electron cooling system is routinely used in collider operations. It has helped to set recent peak luminosity records.
A 4.3-MeV electron cooling system [1] has been installed at Fermilab in the Recycler antiproton storage ring and is currently being commissioned. The cooling system is designed to assist accumulation of 8.9-GeV/c antiprotons for the Tevatron collider operations. This paper reports on the progress of the electron beam commissioning effort as well as on detailed plans of demonstrating the cooling of antiprotons.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.