  e Conversion at Fermilab ? Steve Geer BNL-MECO Meeting January 2006

Fermilab Interest - 1 A small group of scientists at Fermilab have begun discussing possible options for a   e conversion experiment at FNAL: Steve Geer BNL-MECO Meeting January 2006 page 2 If there is a practical & fiscally attractive solution at FNAL for a cutting edge   e experiment, then there are FNAL people interested in the experiment. Accelerator Division Particle Physics Division Chuck Ankenbrandt Fritz DeJongh Dave NeufferDavid Finley Milorad PopovicSteve Geer Eric PrebysRon Ray

Open Questions 1.Is there a way to provide an adequate beam intensity with an acceptable bunch structure for a   e experiment at FNAL without significantly impacting the neutrino program ? 2.How would the experiment evolve from the Booster era to the FPD era ? 3.Cost and Performance ? 4.Should the beam/experiment be MECO-like, PRISM/PRIME - like, or something else ? Steve Geer BNL-MECO Meeting January 2006 page 3

FNAL Vision Steve Geer BNL-MECO Meeting January 2006 page RF module assembly and testing CDR effort Industrialization Not affordable Much longer R&D needed Looks good! Press for early decision Nothing yet LHC discovery: GO This induces other program choices ILC Proton Driver Oddone P5 Talk (9/2005) The future Fermilab program faces a major branch point when it is known whether the ILC is on a fast track or delayed. This “decision point” is expected to occur next year. If we are on an ILC fast track, it may not be realistic to expect a major new experimental initiative at Fermilab beyond NOvA … at least not for a long time, unless there is a significant non-US contribution.

Relationship with Fermilab Proton Driver If we are on an ILC delayed track, we expect a push for the Fermilab Proton Driver (FPD). In the recent FPD physics study, a low energy muon program was identified as a promising candidate to complement the neutrino program at FNAL in the FPD-era. LOCAL THOUGHTS: If there is an attractive solution for a   e conversion experiment at FNAL, I can imagine it being proposed after the FPD decision point (sometime in 2007). The proposed experiment might start at the existing Booster, & then become part of the FPD program (Think of the NOvA plan). Steve Geer BNL-MECO Meeting January 2006 page 5