| Paper | Title | Page |
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| WEXAB02 | Critical R&D Issues for the ILC Damping Rings and New Test Facilities | 1945 |
| The damping rings for the International Linear Collider will be required to accept large beams from the electron and positron sources, and produce highly stable, very low emittance beams for tuning and operation of downstream systems. While many of the parameters for the damping rings are within range of storage rings presently operating, beams meeting the full quality and stability specifications have not been demonstrated. In addition, the requirements for some of the subsystems (for example, the injection and extraction kickers) push the limits of available technology. We discuss the principal goals and challenges of the damping rings research and development program, and the role that could be played by some proposed future damping rings test facilities. | ||
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| TUPAN049 | Low Emittance Lattices and Final Focus Design for the SuperB Project | 1499 |
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For the SuperB project* very low emittances (horizontal < 1 nm) and small beta functions at the Interaction Points are required to achieve the design luminosity of 1036/cm2/s. Low emittance lattice have been designed, using the PEP-II magnets, for the two rings of 4 and 7 GeV, which will have the same emittances and damping times. A new Final Focus section has also been designed to get the strong focusing at the Interaction Point, at the same time providing local correction of the high chromaticity and exploiting the large crossing angle and crabbed waist concepts. Lattice features and chromaticity correction schemes will be discussed. Dynamic apertures, with damping wigglers similar to the ILC ones, will also be presented.
* P. Raimondi, "New Developments for SuperB Factories", Invited talk, this Conference |
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| THPMN075 | Alignment Sensitivities in the ILC Damping Rings | 2877 |
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| For the International Linear Collider to reach its design luminosity, the damping rings must achieve a vertical emittance that is a factor of two below that achieved in any operating storage ring so far. Magnet alignment, orbit control and coupling correction are therefore critical issues for the ILC damping rings. We compare alignment sensitivities in some recent designs for the ILC damping ring lattices, and discuss the results of tuning simulations using different algorithms for correcting the vertical dispersion and the coupling. | ||
| THPAN078 | An Elementary Analysis of Coupled-Bunch Instabilities | 3399 |
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| We reconsider the equations of motion of wakefield coupled bunches in the light of recent developments in Delay Differential Equations. In the case of uniform resistive wall in a circular accelerator, we demonstrate an alternative way to obtain the growth rates. For each Fourier mode of bunch displacements, we show that multiple time domain modes can arise from an exact solution of the equation of motion. The growth rate as it is commonly defined corresponds to only one of them. The amplitude of each Fourier mode can therefore evolve with time in a way is not simply exponential. This is a result that has been observed in simulations of wakefield coupled bunches. |