Wiggler magnets wiggle or oscillate an electron beam perpendicular to the magnetic field. Phase II added two further devices including another Budker superconducting wiggler, for the BMIT beamline. A wiggler is an insertion device in a synchrotron. Retarding field analyzers can be installed in drift regions, dipoles, quadrupoles, and wiggler magnets. Wormaline Wiggler tries to wrangle the lead but Crystal Crawler wins the prize. Critical energy is and superconducting high-field wiggler offers , with 19 poles. Typically the magnets in a wiggler are arranged in a Halbach array. In addition, a 1.8 tesla multiple wiggler is also planned. The design shown above is usually known as a Halbach wiggler. A wiggler has a broader spectrum of radiation than an undulator. These are available in the Stereo Pulsar (solid-state) and Wiggler (tube) pedals.