Micropole undulators: Novel insertion devices for synchrotron sources

Journal Article · Sat Jul 01 04:00:00 EDT 1989 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1140958· OSTI ID:5908107

Toor, A; Csonka, P; Tatchyn, R

Micropole undulators (wigglers) are undulators (wigglers) with submillimeter periods and are referred to, generically, as micropole insertion devices. Compared to ordinary insertion devices, whose period /lambda//sub /ital u// is typically /ge/l cm, micropole devices have periods smaller by a factor /ital f//le/10. Therefore, the first-harmonic radiation emitted by a micropole undulator will have its photon energy /ital E//sub /gamma// increased by /ital f/ and its spectral purity /Delta//lambda///lambda/ by /ital f/, provided the total length of the undulator /ital l//sub /ital u// stays unchanged, and magnetic field errors, as well as the electron-beam emittance, are sufficiently small. Furthermore, to generate photons of the same /ital E//sub /gamma// as from the conventional device, the electron-beam energy /ital E//sub /ital e// can be reduced by /ital f/ /sup 1/2/ , resulting in significantly lower construction and operating costs. Radiative energy losses can be correspondingly diminished for the associated storage rings. In this paper we report on results recently obtained by us in the practical implementation and design of micropole undulators at the Stanford Synchrotron Radiation Laboratory (SSRL) and the Lawrence Livermore National Laboratory (LLNL). Based on our work, micropole undulators with /ital f//le/10/sup 4/ appear feasible at the present time.

• Research Organization: Lawrence Livermore National Laboratory, Livermore, California 94550 (US); Department of Physics, University of Oregon, Eugene, Oregon 97403 and Institute of Theoretical Science, University of Oregon, Eugene, Oregon 97403; Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, California 94305 and Institute of Theoretical Science, University of Oregon, Eugene, Oregon 97403
• DOE Contract Number: AC03-82ER13000
• OSTI ID: 5908107
• Journal Information: Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 60:7; ISSN RSINA
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430400* -- Particle Accelerators-- Storage Rings
DESIGN
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
FABRICATION
FEASIBILITY STUDIES
LAWRENCE LIVERMORE LABORATORY
MAGNETS
NATIONAL ORGANIZATIONS
RADIATION SOURCES
SYNCHROTRON RADIATION SOURCES
US AEC
US DOE
US ERDA
US ORGANIZATIONS
WIGGLER MAGNETS