Parasitic crossing at an asymmetric B factory, APIARY

Conference · Wed May 01 04:00:00 EDT 1991

OSTI ID:5773815

Chin, Y H

Effects of parasitic crossings ( near miss'' collisions of two counter-rotating beams at unwanted positions near the IP) are studied in terms of computer simulations for an asymmetric B Factory, APIARY- 6.3d. Beams are separated horizontally at the first parasitic crossing points by about 7.6 times the horizontal rms size of the low energy beam (the larger in size of the two beams), {sigma}{sub 0x,+}. Simulations, including both the beam collision at the IP and parasitic crossings, have been performed for different separation distances, d. It is found that the ratio d/{sigma}{sub 0x,+} is a good scaling parameter of beam blowup behavior. The results show that beam blowup due to the parasitic crossings is diminished for d {ge} 7{sigma}{sub 0x,+}, in agreement with the bunch separation experiment at CESR. Thus, the nominal separation 7.6 {sigma}{sub 0x,+} turns out to be acceptable, but with only a small margin. Some methods to mitigate the effects of the parasitic crossings are discussed. 3 refs. , 5 figs., 2 tabs.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• Sponsoring Organization: DOE; USDOE, Washington, DC (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5773815
• Report Number(s): LBL-30701; ESG--135; CONF-910505--207; ON: DE91013750
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430200* -- Particle Accelerators-- Beam Dynamics
Field Calculations
& Ion Optics
A CODES
ACCELERATORS
B MESONS
BEAM DYNAMICS
BEAM LUMINOSITY
BEAM-BEAM INTERACTIONS
BEAMS
BOSONS
COLLIDING BEAMS
COMPUTER CODES
COMPUTERIZED SIMULATION
ELEMENTARY PARTICLES
HADRONS
MESON FACTORIES
MESONS
PSEUDOSCALAR MESONS
SIMULATION