Development of an undulator radiation source for the Cornell Electron Storage Ring

Miscellaneous · Sun Jan 01 00:00:00 EST 1989

OSTI ID:5939054

Blum, E B

An undulator was installed in the Cornell Electron Storage Ring (CESR) as an intense sources of hard x-rays. The undulator produces a vertical magnetic field whose strength varies sinusoidally with a 3.3 cm period along the 2 m length of the device. When the 5.437 GeV electron beam in CESR passes through the field of the undulator, the electrons produce a radiation spectrum dominated by sharp peaks consisting of a fundamental with a 2.7 {angstrom} wavelength, and its harmonics. Within the peaks, undulators are capable of producing 10{sup 4} times as much radiations as conventional synchrotron sources. To produce undulator radiation, the greatest angle between the trajectory of an electron and the central axis of the undulator must be less than the opening angle of the radiation. A special low emittance lattice was designed for CESR to satisfy this condition. The characteristics of low emittance lattice designs are discussed and the performance of an undulator with an electron beam of non-zero emittance is analyzed. The undulator consists of vanadium permendur poles excited by neodymium iron boron permanent magnets. The peak field on-axis is 0.53 T although a lower field was used in practice. The design of the magnet is discussed. Under low emittance conditions in CESR, as much as 35 mA of electrons were stored in a single bunch and a total of 115 mA were stored in six bunches. The horizontal emittance was 65 nm-rad and the vertical emittance was 1 nm-rad. The magnetic field of the undulator had no significant effect on the behavior of the beam.

• Research Organization: Cornell Univ., Ithaca, NY (USA)
• OSTI ID: 5939054
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
CESR STORAGE RING
WIGGLER MAGNETS
RADIATION SOURCES
DESIGN
BEAM BUNCHING
BEAM EMITTANCE
ELECTRON BEAMS
HARD X RADIATION
MAGNETIC FIELDS
PERFORMANCE
SPECTRA
BEAM DYNAMICS
BEAMS
ELECTRICAL EQUIPMENT
ELECTROMAGNETIC RADIATION
ELECTROMAGNETS
EQUIPMENT
IONIZING RADIATIONS
LEPTON BEAMS
MAGNETS
PARTICLE BEAMS
RADIATIONS
STORAGE RINGS
X RADIATION
430400* - Particle Accelerators- Storage Rings
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