| Paper |
Title |
Page |
| MOPLT123 |
A Reduced Emittance Lattice for the NLC Positron Pre-damping Ring
|
827 |
| |
- I. Reichel, A. Wolski
LBNL, Berkeley, California
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The Pre-Damping Ring of the Next Linear Collider has to accept a large positron beam from the positron production target, and reduce the emittance and energy spread to low enough values for injection into the Main Damping Ring. A previous version of the lattice yielded an emittance of the extracted beam which was about 20% too large. In order to get the emittance down to the required value the quadrupole magnets in the dispersive regions in the ring were moved horizontally; this modifies the damping partition numbers. In addition, the model of the wigglers has been modified to reflect more closely the magnetic field map. The new lattice design meets damping and emittance requirements. The lattice and dynamic aperture studies are presented.
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| TUPLT154 |
Aperture Studies for the Fermilab AP2 Anti-proton Line
|
1491 |
| |
- I. Reichel, M. Placidi, M.S. Zisman
LBNL, Berkeley, California
- K. Gollwitzer, S. Werkema
Fermilab, Batavia, Illinois
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The AP2 beamline transports anti-protons from the production target to the Debuncher ring. In the past the observed aperture has been smaller than that estimated from linear, on-energy optics. We have investigated possible reasons for the aperture limitation and have identified possible sources, including residual vertical dispersion from alignment errors and chromatic effects due to very large chromatic lattice functions. Some experiments have already been performed to study these effects. We present results of the experimental and theoretical studies and possible remedies.
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