Abstract
A τ/charm Factory, an e + e- collider with very high luminosity at the 2–4.6 GeV center of mass energy, to be built on the Rome University at Tor Vergata campus, was studied by the Consortium Nicola Cabibbo Laboratory and the INFN Frascati Laboratories. This project is the natural evolution of the flagship Italian project SuperB Factory, funded by the Italian Government in 2010 with a budget that turned out to be insufficient to cover the total costs of the project. The study of rare events at the τ/charm energy was already planned as a Phase-II of SuperB [1]. This design keeps all the unique features of SuperB, including the polarization of the electron beam, with the possibility to take data in a larger energy range, with reduced accelerator dimensions and construction and operation costs. A Report on the accelerator design has been published in September 2013 [2].
Highlights
The project of a /charm Factory in the Rome Tor Vergata University area was developed after the cancellation of the SuperB B-Factory project
The principles of operation of such an accelerator are still based on the SuperB ones, like the “Crab waist and large Piwinski angle” [3] collision scheme, which has been successfully tested at the -Factory DA NE in Frascati [4], with small beam emittances and smaller beam sized at the Interaction Point
The lower centre of mass energy should be at the resonance (1.05 GeV) to complete the data collected at the DA NE collider at LNF Frascati
Summary
The project of a /charm Factory in the Rome Tor Vergata University area was developed after the cancellation of the SuperB B-Factory project. The accelerator is designed to have a main operation point at the /charm threshold, operation at lower and slightly higher energies is foreseen. The lower centre of mass energy should be at the resonance (1.05 GeV) to complete the data collected at the DA NE collider at LNF Frascati. Upper energies will allow the study of the s resonance at 4.35 GeV. Instead of two SRS, one on each side of the FF, just one, with similar characteristics, will be placed in the straight section opposite to the IP Thanks to this choice, there are no more polarization resonances, and the option to have asymmetric beam energies would not require to have “quantized” energies. The use of the Linac for a SASE-FEL facility, a Beam Test Facility for detectors test, and a Neutron production facility have been considered as options
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