On a quasi-isochronous B Factory in the PEP tunnel

Technical Report · Mon Jul 01 00:00:00 EDT 1991

DOI:https://doi.org/10.2172/5153792· OSTI ID:5153792

Heifets, S

Isochronous, or quasi-isochronous storage rings with very small momentum compaction factor {alpha} for various applications are discussed. This approach looks very promising for the B-Factory design. A small momentum compaction factor reduces the bunch length at the given RF voltage. A small bunch length allows, in principle, reduction of the beta function at the interaction point (IP) with a corresponding increase of the luminosity. However, achieving this is not easy due to difficulties with local chromatic effects at the IP, more severe background problems in the detector, and enhanced adverse effects of the beam-beam interaction. Although these problems can be addressed, they require substantial changes in the present design. It is worth noting that shorter bunches would also have larger energy losses and larger energy spread, due to wake field excitation and the smaller disruption parameter reducing the enhancement factor. But energy losses scale with the bunch length {sigma}{sub z} as {sigma}{sub z}{sup {minus}{1/2}}, remaining small compared with the losses due to synchrotron radiation. The disruption parameter is small in the present design anyway; hence, these effects do not cause additional problems.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 5153792
• Report Number(s): SLAC/AP-89; ON: DE92002028
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
B MESONS
MESON FACTORIES
BEAM DYNAMICS
BEAM BUNCHING
ISOCHRONOUS CYCLOTRONS
LINEAR MOMENTUM
PEP STORAGE RINGS
STABILITY
ACCELERATORS
BEAUTY PARTICLES
BOSONS
CYCLIC ACCELERATORS
CYCLOTRONS
ELEMENTARY PARTICLES
HADRONS
MESONS
PSEUDOSCALAR MESONS
STORAGE RINGS
430200* - Particle Accelerators- Beam Dynamics
Field Calculations
& Ion Optics