The extended Touschek lifetime

Conference · Sun Jun 01 04:00:00 EDT 1997

OSTI ID:495833

Bizek, H M ^[1]

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1. Argonne National Lab., IL (United States). Advanced Photon Source

Scattering of particles within the bunch is called Touschek scattering. If large enough, such an energy transfer may eject the particle out of the bunch. If a particle is scattered in the dispersive region, it will induce a horizontal betatron oscillation which will be coupled into vertical motion when it passes through skew components. The amount of coupling is expressed in terms of the coupling coefficient, {chi}. If the coupling coefficient is large enough, the resulting vertical oscillations may exceed the normally small vertical admittance of the ring. Thus the particles may be lost even though the energy loss is within the momentum acceptance. The lifetime associated with this loss mechanism is called the extended Touschek lifetime. In the usual touschek lifetime calculation, the lifetime increases as the coupling increases. Including the effect of the vertical oscillation results in a decrease of Touschek lifetime beyond some coupling value.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 495833
• Report Number(s): ANL/ASD/CP--92322; CONF-970503--132; ON: DE97053136
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ADVANCED LIGHT SOURCE
BEAM DYNAMICS
COLLISIONS
ENERGY LOSSES
ENERGY TRANSFER
LIFETIME
SCATTERING