Chasman–Green lattice

The Chasman–Green lattice, also known as a double bend achromat lattice (DBA lattice), is a special periodic arrangement of magnets designed by Renate Chasman and G. Kenneth Green of Brookhaven National Laboratory in the mid 1970s. These lattices provide optimized bending and focusing of electrons in particle accelerator rings known as synchrotron light sources.^[1][2][3][4] An electron storage ring constructed with a Chasman–Green lattice has the important property that the circulating electron beams have very low emittance, which results in the emission of synchrotron light of exceptional brightness. For this reason it is the lattice of choice for most of the premier synchrotron light source facilities worldwide.

Each period of the Chasman–Green lattice contains a focusing quadrupole magnet symmetrically located between a pair of identical dipole magnets, which transports incident electrons through a bending arc to an exit path that is independent of the electron energy.

References

1. ^ R. Chasman, G. K. Green, E. M. Rowe (1975). "Preliminary Design of a Dedicated Synchrotron Radiation Facility". IEEE Transactions on Nuclear Science 22: 1765. Bibcode 1975ITNS...22.1765C. doi:10.1109/TNS.1975.4327987. http://accelconf.web.cern.ch/AccelConf/p75/PDF/PAC1975_1765.PDF. 
2. ^ R. Chasman and G. K. Green (1976). Design of a National Dedicated Synchrotron Radiation Facility. OSTI 7334216. http://www.osti.gov/bridge/servlets/purl/7334216-gvx4u5/. 
3. ^ J. P. Blewett (1977). "Proposal for a National Synchrotron Light Source, v1". OSTI 7107499. http://cdsweb.cern.ch/record/118024 
4. ^ J. P. Blewett (1977). "Proposal for a National Synchrotron Light Source, v2". doi:10.2172/966114. OSTI 966114. http://cdsweb.cern.ch/record/118132 

http://www.bnl.gov/isd/documents/20484.pdf