An undulator with a composite magnetic field

Michio Niwano, Hideo Kitamura

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


A new type of undulator greatly improved in tunability as compared with a usual undulator, is proposed. The undulator has a composite magnetic field which is a linear superposition of two sinusoidally varying fields with different spatial periods. The wavelength can be changed by varying the field strength of the longer-period component while keeping that of the shorter-period component at the highest possible value. Numerical calculations of the spectral brightness were carried out. The proper ratios between the two spatial periods were found to be 3:1, 5:1 and 7:1.

Original languageEnglish
Pages (from-to)388-393
Number of pages6
JournalNuclear Inst. and Methods in Physics Research, A
Issue number2
Publication statusPublished - 1985 Feb 1

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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