Non-linear Inserts for a Rapid Cycling Synchrotron Replacement for the Fermilab Booster Synchrotron

Modern accelerator systems are limited in intensity because high intensity beams lose a lot of particles that activate or damage the accelerator itself. The stability of these beams, and thus the intensity limit, comes from the approach of designing accelerators with a linear lattice. The so-called integrable optics technique fixes this problem by making the accelerator manifestly non- linear, but also stable. This technique requires a special non-linear magnet system that is custom to each accelerator that uses it. In this project, it is proposed to develop a prototype of the non-linear magnetic insert for integrable Rapid Cycling Synchrotron, presently under development at Fermilab. Through 3D magnetic design and optimization, the magnet will achieve the non-linear field required to produce the requisite non-linear dynamics maximizing the dynamic aperture of the machine. The project is heavily leveraged against RadiaBeam prior experience of developing a smaller proof- of-concept non-linear magnetic insert for the IOTA test ring at Fermilab, which is presently under commissioning. In Phase I of this project we will perform 2D and 3D magnetic simulations to optimize the poles geometry in the proposed non-linear magnetic insert; create a conceptual engineering design of the magnetic assembly, and develop manufacturing and acceptance plans, including vacuum chamber integration, and magnetic metrology instrumentation requirements.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.