A "Wavelength Shifter" for the University of Wisconsin Electron Storage Ring

Synchrotron Radiation

“…If the device has a single high field pole, then it is often termed a wavelength shifter. The first such device was tested in the 240 MeV TANTALUS ring [37]. Several superconducting wavelength shifters are now operating with peak fields of 5-6 T. If the device has several magnet poles, then the output flux and brightness are increased accordingly and the device is generally called a multipole wiggler.…”

Tantalus, a 240MeV Dedicated Source of Synchrotron Radiation, 1968–1986

“…Another early instrument was the so-called 'wavelength shifter', the first insertion device designed to tailor the spectrum of synchrotron radiation, installed in 1973 (Rowe & Mills, 1973;Trzeciak, 1971). This was a three-pole electromagnet with a central field up to 24.5 kG, higher than that of the bending magnets, so the spectrum was skewed to shorter wavelengths.…”