Speaker
Description
Permanent magnets (PMs) are becoming an attractive proposition as an environmentally friendly and efficient replacement for electromagnets in modern particle accelerators. In recent years the Zero-Power Tuneable Optics (ZEPTO) collaboration between STFC and CERN has demonstrated that traditional limitations of PM technology, such as the ability to change the field in the magnet aperture, can be overcome. This is achieved by moving PM blocks relative to fixed steel poles and yokes, allowing strength to be changed but keeping high field quality.
A new ZEPTO magnet has been developed in conjunction with Diamond Light Source (DLS) to demonstrate our technology on a real accelerator. This magnet features a number of crucial design innovations over previous ZEPTO magnets that greatly improve the convenience and versatility of PM systems and demonstrate that they can be deployed in a variety of situations.
This new magnet has now been built, measured and installed on DLS. We discuss here its measured performance relative to the design parameters and discuss the functionality of the new features with focus on the real-world implications of tuneable PM technology for current and future accelerators. We also discuss the challenges inherent in the construction and measurement of magnets of this nature.