Concept of quasi-periodic undulator - control of radiation spectrum

Technical Report · Wed Feb 01 00:00:00 EST 1995

DOI:https://doi.org/10.2172/88773· OSTI ID:88773

Sasaki, Shigemi ^[1]

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1. Japan Atomic Energy Research Institute, Ibaraki (Japan)

A new type of undulator, the quasi-periodic undulator (QPU) is considered which generates the irrational harmonics in the radiation spectrum. This undulator consists of the arrays of magnet blocks aligned in a quasi-periodic order, and consequentially lead to a quasi-periodic motion of electron. A combination of the QPU and a conventional crystal/grating monochromator provides pure monochromatic photon beam for synchrotron radiation users because the irrational harmonics do not be diffracted in the same direction by a monochromator. The radiation power and width of each radiation peak emitted from this undulator are expected to be comparable with those of the conventional periodic undulator.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• OSTI ID: 88773
• Report Number(s): LBL-PUB-754; ON: DE95008449; TRN: 95:004113-0006
• Resource Relation: Other Information: PBD: Feb 1995; Related Information: Is Part Of The art and science of magnet design: A Festschrift in honor of Klaus Halbach. Volume 1; Cross, J. [ed.]; PB: 202 p.
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
WIGGLER MAGNETS
ASYMMETRY
DESIGN
SYNCHROTRON RADIATION SOURCES