Speaker
Description
The Oak Ridge National Laboratory STS Project will enhance the Spallation Neutron Source by adding a new neutron source. The upgrade includes a 30% increase in beam energy and a 50% boost in beam current, doubling the accelerator's power capability to 2.8 MW. The Ring-to-Second-Target Beam Transport (RTST) system is vital in directing high-energy proton beams to the target. A key element of the RTST system is the extraction magnets, which are tasked with precise beam extraction and transport. Within the framework of this work, Fermilab is responsible for carrying out the development of 3 types of magnets: Pulsed Dipole, Large Aperture Quadrupole and Narrow Quadrupole. The Pulsed Dipole with a gap of 25 cm and a yoke length of 50 cm is designed to generate an integrated field of ≥ 0.1839 T-m for a duration of at least 2 ms, operating at a frequency of 15 Hz. The Large Aperture Quadrupole with 40 cm aperture diameter and 70cm core length is engineered to deliver an integrated field of ≥ 3.0872 T, ensuring precise beam focusing and alignment. The Narrow Quadrupole integrated field strength is set at 2.9650 T ± 1% and the aperture size is ≥ 20.9 cm. The compact design of the magnet assembly should provide compatibility with the RTBT system's spatial limitations with dimensions not exceeding 70 cm in width. Working on these three types of magnets is a challenge for Fermilab engineers because, in addition to the high requirements on the quality of magnetic fields, they are subject to major restrictions related to their dimensions. Magnetic, mechanical, and thermal calculations were carried out for all three types of magnets, confirming the functionality of the designs.
