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| MOPLS141 |
The Proposed Conversion of CESR to an ILC Damping Ring Test Facility
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891 |
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- M.A. Palmer, R.W. Helms, D. L. Rubin, D. Sagan, J.T. Urban
Cornell University, Laboratory for Elementary-Particle Physics, Ithaca, New York
- M. Ehrlichman
University of Minnesota, Minneapolis, Minnesota
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In 2008 the Cornell Electron Storage Ring (CESR) will end nearly three decades of providing electron-positron collisions for the CLEO experiment. At that time it will be possible to reconfigure CESR as a damping ring test facility, CesrTF, for the International Linear Collider (ILC) project. With its complement of 12 damping wigglers, CesrTF will offer horizontal emittances in the few nanometer range and, ideally, vertical emittances approaching those specified for the ILC damping rings. An important feature of the CesrTF concept is the ability to operate with positrons or electrons. Positron operation will allow detailed testing of electron cloud issues critical for the operation of the ILC positron damping rings. Other key features include operation with wigglers that meet or exceed all ILC damping ring requirements, the ability to operate from 1.5 to 5.5 GeV beam energies, and the provision of a large insertion region for testing damping ring hardware. We discuss in detail the CesrTF machine parameters, critical conversion issues, and experimental reach for damping ring studies.
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| THPCH148 |
Tests of a High Voltage Pulser for ILC Damping Ring Kickers
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3137 |
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- M.A. Palmer, G. Dugan, D. L. Rubin
Cornell University, Laboratory for Elementary-Particle Physics, Ithaca, New York
- R. Meller
Cornell University, Department of Physics, Ithaca, New York
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The baseline configuration for the International Linear Collider (ILC) damping rings specifies a single 6 km damping ring for electrons and two 6 km rings for positrons. Kicker requirements are determined by the damping ring circumference and the train structure in the main linac. The nominal bunch train parameters in the ILC main linac are trains of 2820 bunches with 308 ns spacing and a train repetition rate of 5 Hz. This means that the pulsers for the damping ring kickers must have rise and fall times suitable for bunch spacings of ~6 ns, must be able to operate with 3.25 Mhz bursts, and must support an average pulse rate of 14.1 kHz. We describe bench and beam tests of a pulser based on fast ionization dynistor technology whose specifications roughly meet these requirements. We then discuss the implications of our results for the ILC damping ring kickers.
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