National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

Details

Energy Recovery Linac (ERL) as a Driver for X-ray Producing Insertion Devices.

DE2001787355

Publication Date	2001
Personal Author	Tigner, M.; Bazarov, I.; Bilderback, D.; Gruner, S.; Padamsee, H.; Krafft, G.; Merminga, L.
Page Count	3
Abstract	Storage rings have served well as x-ray sources, achieving continued increases in flux and brightness. While further improvements in performance may still be expected, the performance of these machines is circumscribed by radiation fluctuations and by the Touschek effect. The practical effect of the radiation fluctuations is to limit the minimum 6D emittance of the rings in general, particularly the bunch length. Through limiting the lifetime, the Touschek effect also limits the charge density in the bunches. These effects can be greatly ameliorated through use of a linac driver for the x-ray producing devices such as small gap undulators because the beam passes through only once and in a time short compared to the radiation equilibration time. In this case, the emittance is limited only by the source and the beam is thrown away after each pass so that radiation and collision effects are no longer relevant. By recovering the kinetic energy carried by the beam through use of the energy recovery principle in a superconducting linac, one can in principle support beam currents comparable to those of storage rings but with smaller emitting source area. These advantages permit the achieving of superior brilliance while giving great flexibility in bunch pattern and bunch length. The concept of a 5 - 7 GeV facility using this principle is described and parameter goals are given.
Keywords	Beam currents Charge density Energy recovery Kinetic energy Linear accelerators Wiggler magnets X-ray sources Beam emittance Superconducting devices Design
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Thomas Jefferson National Accelerator Facility, Newport News, VA.; Department of Energy, Washington, DC.
Document Type	Conference Proceedings
NTIS Issue Number	200204
Contract Number	AC05-84ER40150

Energy Recovery Linac (ERL) as a Driver for X-ray Producing Insertion Devices.

Energy Recovery Linac (ERL) as a Driver for X-ray Producing Insertion Devices.
DE2001787355

Publication Date	2001
Personal Author	Tigner, M.; Bazarov, I.; Bilderback, D.; Gruner, S.; Padamsee, H.; Krafft, G.; Merminga, L.
Page Count	3
Abstract	Storage rings have served well as x-ray sources, achieving continued increases in flux and brightness. While further improvements in performance may still be expected, the performance of these machines is circumscribed by radiation fluctuations and by the Touschek effect. The practical effect of the radiation fluctuations is to limit the minimum 6D emittance of the rings in general, particularly the bunch length. Through limiting the lifetime, the Touschek effect also limits the charge density in the bunches. These effects can be greatly ameliorated through use of a linac driver for the x-ray producing devices such as small gap undulators because the beam passes through only once and in a time short compared to the radiation equilibration time. In this case, the emittance is limited only by the source and the beam is thrown away after each pass so that radiation and collision effects are no longer relevant. By recovering the kinetic energy carried by the beam through use of the energy recovery principle in a superconducting linac, one can in principle support beam currents comparable to those of storage rings but with smaller emitting source area. These advantages permit the achieving of superior brilliance while giving great flexibility in bunch pattern and bunch length. The concept of a 5 - 7 GeV facility using this principle is described and parameter goals are given.
Keywords	Beam currents Charge density Energy recovery Kinetic energy Linear accelerators Wiggler magnets X-ray sources Beam emittance Superconducting devices Design
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Thomas Jefferson National Accelerator Facility, Newport News, VA.; Department of Energy, Washington, DC.
Document Type	Conference Proceedings
NTIS Issue Number	200204
Contract Number	AC05-84ER40150