Development of a variable energy RFQ for cluster acceleration
An RFQ (radio-frequency quadrupole) has been designed and built as a postaccelerator for the cluster accelerator facility at the IPN (Institute de Physique Nucleaire) Lyon, France. The four-rod RFQ resonator is designed for variable energy by means of a variable frequency of the resonator between 80 and 110 MHz. The properties of the RFQ for the typical cluster mass ranges of up to 50 u are discussed and the status of the project is reported.<<ETX>>
RFQ ion accelerators with variable energy
Abstract RFQs are low-energy rf accelerator structures which can efficiently transport and accelerate high-current ion beams. Whilst usually RFQs, like all rf accelerators, have a fixed velocity profile and output energy per amu, attempts have been made to vary the ion beam energy by changing the resonator frequency. The 4-rod λ/2-RFQ resonator developed in Frankfurt for heavy-ion acceleration is well suited for such an application. Results of the work on variable-energy VE-RFQs are presented and the status of the variable-energy cluster accelerator project is discussed.
Negotiating the cultural and economic outcomes of sport heritage attractions: the case of the National Baseball Hall of Fame
ABSTRACT Contemporary museums must balance their roles as commercial entities and repositories of various, and often dissonant, heritages and histories. Sports museums in particular often have clear commercial and nostalgic aims, particularly through tourist visitation, though the extent to which they represent more challenging narratives remains unclear. This paper examines how one of the most famous sports museums in the world, the National Baseball Hall of Fame (NBHF) in Cooperstown, New York, balances its dual role as tourist attraction and repository of baseball's sometimes checkered past. It was found that different sections of the museum provide greater or lesser degrees of engagement with more controversial issues, although the commercial outputs and appeal of the museum remains clear throughout. Utlimately, the NBHF demonstrates that balancing veneration and critique in collections can be commercially prosperous, and can provide a template for other sport and popular culture museums who may be wary of incorporating more challenging narratives in their exhibits. Furthermore, the symbiotic relationship between the Hall of Fame and the village of Cooperstown, particularly in creating and maintaining cultural and economic outputs, requires further exploration.