Status of the AC Dipole Study

1
Status of the AC Dipole Study

• Ryoichi Miyamoto
• 3/28/2007
• LARP Meeting _at_ Fermilab

2
Basics
d
?
_at_VBPMB18
?d
1-?d
0
1
_at_VBPMB21
3
Driven Oscillation ? Natural Oscillation

• Relative ß can be measured
• Need to be scaled to determine
• the absolute function.

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Courant-Snyder Parameter Measurement_at_ IP Using
CPMs (Syphers Scheme)

• Gives the scaling to the relative measurement.
• ß and waist location are also very important.

_at_ Tevatrons IPs
If x and x are known
BPMU
BPMD

• No magnets
• (except detectors solenoids)
• Particles drift
• x and x can be measured

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AC Dipole Version of the Courant-Snyder Parameter
Measurement _at_ IP Using CPMs
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Measured ß
ACD DO
ßup m 29.7 29.6
ßdown m 34.0 34.0
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Measured a
ACD DO
aup 3.89 3.92
adown -4.24 -4.22
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Phase Spaces with Different d (Backup)
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Example of the Pingers TBT Data (Backup)
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Analytic Expression of the Driven Oscillation