Modified octupoles for damping coherent instabilities

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

OSTI ID:5859755

Cornacchia, M ^[1]; Corbett, W J ^[2]; Halbach, K ^[3]

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1. Stanford Univ., CA (USA). Stanford Synchrotron Radiation Lab.
2. Stanford Linear Accelerator Center, Menlo Park, CA (USA)
3. Lawrence Berkeley Lab., CA (USA)

The introduction tune spread in circular e{sup +}e{sup {minus}} accelerators with modified octupoles to reduce the loss of dynamic aperture is discussed. The new magnet design features an octupole of field component on-axis and a tapered field structure off-axis to minimize loss of dynamic aperture. Tracking studies show that the modified octupoles can produce the desired tune spread in SPEAR without compromising confinement of the beam. The technique for designing such magnets is presented, together with an example of magnets that give the required field distribution. 7 refs., 7 figs.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (USA)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (USA)
• DOE Contract Number: AC03-76SF00515; AC03-76SF00098
• OSTI ID: 5859755
• Report Number(s): SLAC-PUB-5528; LBL-PUB-30638; CONF-910505-78; ON: DE91012325
• 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
INSTABILITY
LANDAU DAMPING
MULTIPOLES
MODIFICATIONS
SPEAR
BEAM OPTICS
COMPUTERIZED SIMULATION
DESIGN
MAGNETIC FIELDS
MAGNETS
TUNING
DAMPING
SIMULATION
STORAGE RINGS
430300* - Particle Accelerators- Auxiliaries & Components
430200 - Particle Accelerators- Beam Dynamics
Field Calculations
& Ion Optics