Parasitic crossing at an asymmetric B factory, APIARY

Conference · Wed May 01 00:00:00 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: USDOE; USDOE, Washington, DC (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5773815
• Report Number(s): LBL-30701; ESG-135; CONF-910505-207; ON: DE91013750
• Resource Relation: Conference: 1991 Institute of Electrical and Electronics Engineers (IEEE) particle accelerator conference (PAC), San Francisco, CA (USA), 6-9 May 1991
• Country of Publication: United States
• Language: English

Related Subjects

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