Speaker
Description
The Frascati National Laboratories (LNF) of National Institute for Nuclear Physics (INFN) have extensive experience in the design and measurement of electromagnets and permanent magnets for particle accelerators. A large amount of design and tests, including detailed magnetic characterization for various projects such as the DAΦNE collider [1] , CNAO [2], and other experiments have been carried out consolidating the expertise in this field.
In the last decades, the activities of the Laboratories moved towards high-brightness electron sources with the SPARC [3] linac test facility where the current activities are focused on plasma-based acceleration techniques. This facility is the baseline for the future EuPRAXIA@SPARC_LAB accelerator [4]. Additionally, a Beam Test Facility (BTF) [5] is present at LNF. This facility is a beam transfer line designed for the optimized, stochastic production of single electrons/positrons for detector calibration, offering high beam versatility in terms of spot size, divergence, multiplicity (number of particles/spill) and energy.
According to the requirements of the LNF facilities, several designs of magnets have been carried out in recent years, primarily for linac accelerators. These designs cover a wide range of magnets typologies, including electromagnetic solenoids, dipoles, quadrupoles and steerers, as well as permanent magnets dipoles and quadrupoles.
A Magnetic Measurement Laboratory is present at LNF; it is devoted to deep magnets characterization thanks to a wide range of equipment for integrated magnetic measurement and for 3D field mapping. In the last years, an instrumentation revamping phase was necessary to maintain measurement capabilities and preserve expertise. This upgrade [6] has been started thanks to several co-funding projects, such as LATINO [7], IRIS [8] and internal INFN support. The revamping was oriented both towards the update of the existing instrumentation, such as the Hall probe measurement bench, and towards the purchase of new equipment, including a rotating coil [9], a Single Stretched Wire Bench [10], a Pulsed Wire bench, a probe calibration system, and 3D Hall probe mole system.
Thanks to these instruments, many magnets have been measured both for LNF facilities and for external projects involving INFN, such as FOOT [11] and STAR [12].
In this paper, several magnets design and magnetic measurement tests performed at LNF are presented covering a wide range of magnet typologies and measurement methods. Moreover, an overview of the magnetic laboratory equipment upgrade is given, highlighting the current and future instruments that will be hosted in the renewed facility. These improvements are aimed at guaranteeing high flexibility in meeting measurement requirements covering a wide range of magnets type for external user and for the future projects at LNF, such as EuPRAXIA.
