Beams Document 2029-v1

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AC Dipole Based Diagnostics

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Ryoichi Miyamoto
Updated by:
Ryoichi Miyamoto
Document Created:
21 Nov 2005, 11:23
Contents Revised:
21 Nov 2005, 11:23
Metadata Revised:
21 Nov 2005, 11:23
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In recent years, there has been growing interests in
developing non-destructive beam diagnostic tools for
high energy accelerators. AC dipole as a tool to
adiabatically excite large amplitude coherent betatron
oscillations without emittance blowup is very useful in
exploring the beam dynamics. This technique was first
tested in the Brookhaven AGS with Au beam. It was then
used in the AGS polarized proton operation to overcome
strong intrinsic spin resonances by inducing a full spin
flip. Two AC dipoles were also installed in RHIC for
linear optics measurement as well as non-linear resonance
driving term measurement. The vertical ac dipole in RHIC
can also be resonated close to half of the revolution
frequency for spin manipulations. This talk will overview
the ac dipole applications after a short introduction of
the system.
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AC Dipole
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