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Magnetized Electron Transport in the Proposed Electron Cooling Section of the Relativistic Heavy Ion Collider--Tech-X Corporation, 5621 Arapahoe Avenue, Suite A, Boulder, CO  80301; 303-448-0727, www.techxhome.com 

Dr. Dan T. Abell, Principal Investigator, dabell@txcorp.com 

Dr. John R. Cary, Business Official, cary@txcorp.com 

DOE Grant No.  DE-FG02-03ER83796

Amount:  $749,915

One of this country's premier nuclear physics accelerator facilities is colliding heavy ions to create conditions similar to those a fraction of a second after the Big Bang.  As part of a planned luminosity upgrade, an electron cooling system will be built that will have parameters and requirements fundamentally different from any built previously.  Therefore, as part of the research and design process, a need will exist for high-speed, high-fidelity numerical simulations to assess the impact of space-charge effects, nonlinearities, and machine errors on the electron transport line.  This project will add functionality to an existing three-dimensional code to make it a suitable tool for doing high-fidelity simulations and analysis of high-current magnetized electron transport lines, including misalignments and nonlinear radio frequency (RF) accelerating fields.  Phase I developed and implemented methods to extract from electric field data the information required to construct high-order maps for RF cavities.  An approach for adding general misalignments to a high-order beam dynamics code was defined.  Finally, the code was applied to the tracking of simulations of an electron transport line that is currently under development.  Phase II will complete the implementation of accurate, high-order maps for RF cavities, and implement general misalignments.  The improved code will be used to make detailed studies of a novel electron transport line currently under design.  A suite of tools (e.g., input file converters, post-processing utilities) will be developed to ease the comparison with simulations done by different codes.

Commercial Applications and Other Benefits as described by awardee:  The modified code should benefit scientists working to design accelerators in which space-charge effects, field nonlinearities, and machine errors are significant concerns.