Muons, Inc, Illinois, USA
JLAB, Newport News, Virginia, USA
Fermilab, Batavia, USA
The theory of the Helical muon beam ionization Cooling Channel* (HCC) and the technical challenges to construct the most efficient HCC are discussed. The design and construction plans for a 1-m, 20-cavity prototype HCC segment are described, including efforts to develop hydrogen pressurized RF cavities that are loaded with dielectric, fed by magnetrons, and operate in a superconducting helical solenoid magnet. We describe the HCC for a muon collider that would enable the only direct measurement of the width of the recently detected candidate Higgs Boson as an s-channel resonance.
Y. Derbenev, R P. Johnson. Published in Phys. Rev.ST Accel. Beams 8:041002,2005.
MOPM1HA02
JLAB, Newport News, Virginia, USA
A polarized electron-ion ring-ring collider (EIC) based on use of the 12 GeV CEBAF is envisioned at Jefferson Lab as an energy frontier of the nuclear science program. Over the last decade, a conceptual design of EIC@JLab has been developed; a comprehensive report summarizing the baseline and accelerator R&D progress has been released recently. The luminosity concept is based essentially on use of an ERL+circulator ring based electron cooling to access low emittance very short ion bunches at a high repetition rate. This report is briefly lighting up the recent progress of the low (LEIC) and medium (MEIC) ion energy staged EIC design studies in the following areas: development of the interaction regions (IR) and detectors design; studies of detector background; optimization of chromatic compensation and dynamic aperture in the collider rings; optimization of the polarization design in the figure-8 booster and collider rings; collider ring and ion large booster optics design optimization; study of dynamics of electron beam in the cooler ring and ERL.
JLAB, Newport News, Virginia, USA
Cooling of ion beams is essential for achieving a high luminosity for MEIC at Jefferson Lab. In this paper, we present the design concept of the electron cooling system for MEIC. In the design, two facilities are required for supporting a multi-staged cooling scheme; one is a 2 MeV DC cooler in the ion pre-booster; the other is a high electron energy (up to 55 MeV) ERL-circulator cooler in the collider ring. The simulation studies of beam dynamics in an ERL-circulator cooler are summarized and followed by a report on technology development for this cooler. We also discuss two proposed experiments for demonstrating high energy cooling with a bunched electron beam and the ERL-circulator cooler.