Development of Non-Linear Inserts for IOTA Ring at Fermilab

Conventional linear lattice accelerator designs limit the available dynamic aperture because they are unstable to chromatic effects and subject to resonances. By designing a lattice that is non- linear from the initial design, so-called integrable optics, the dynamic aperture can be increased as particles can pass through resonances and are less sensitive to chromatic aberrations in the lattice. Integrable optics implementation could become a major breakthrough to extend the intensity frontier of particle accelerators, and advance exploration of small cross section events such as lepton flavor oscillations. In response to such opportunity, it is proposed to develop non-linear magnetic inserts required to produce the requisite non-linear motion at the IOTA ring, an electron accelerator ring under construction at Fermilab, which is designed to test non-linear dynamics in a scaled model of the larger proton machine. A successful development of the prototype insert would facilitate the first practical demonstration of the integrable optics accelerator. A magnetic design and initial engineering of the non-linear magnetic insert were completed. A four sectors bench top prototype was fabricated, and measured with the pulsed wire and a Hall probe. A full-scale (2 meters long) prototype insert will be fabricated, characterized through magnetic measurements, and installed on the IOTA ring. In addition, a beam transport experiment with the prototype insert will be performed at Fermilab. Commercial Applications and Other Benefits: A practical realization of the integrable optics non-linear lattice design will aid in the dissemination of different, and potentially powerful design methods for future accelerators, and hasten the deployment of such accelerators in applications such as electricity generation, spent nuclear fuel processing, medical isotope production, and discovery science.