Higher order correlations in computed particle distributions [electronic resource].
- Menlo Park, Calif. : Stanford Linear Accelerator Center, 1989.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- Pages: 3 : digital, PDF file
- Additional Creators:
- Stanford Linear Accelerator Center
United States. Department of Energy. Office of Scientific and Technical Information
- The rms emittances calculated for beam distributions using computer simulations are frequently dominated by higher order aberrations. Thus there are substantial open areas in the phase space plots. It has long been observed that the rms emittance is not an invariant to beam manipulations. The usual emittance calculation removes the correlation between transverse displacement and transverse momentum. In this paper, we explore the possibility of defining higher order correlations that can be removed from the distribution to result in a lower limit to the realizable emittance. The intent is that by inserting the correct combinations of linear lenses at the proper position, the beam may recombine in a way that cancels the effects of some higher order forces. An example might be the non-linear transverse space charge forces which cause a beam to spread. If the beam is then refocused so that the same non-linear forces reverse the inward velocities, the resulting phase space distribution may reasonably approximate the original distribution. The approach to finding the location and strength of the proper lens to optimize the transported beam is based on work by Bruce Carlsten of Los Alamos National Laboratory. 11 refs., 4 figs.
- Published through SciTech Connect.
13. particle accelerator conference, Chicago, IL, USA, 20 Mar 1989.
Miller, R.H.; Hanerfeld, H.; Herrmannsfeldt, W.
- Funding Information:
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