The MAVR high-resolution magnetic analyzer setup

Abstract

This paper presents the MAVR high-resolution magnetic analyzer, operating at the U400 cyclotron and the DRIBs radioactive ion beam facility at the Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research. The analyzer is designed to study nuclear reactions using stable and radioactive ion beams over a wide energy range, from subthreshold energies to 30 MeV per nucleon. Its key features include a large solid angle of 15 msr, high momentum resolution of approximately $10^{-4}$, a focal plane length of 1.9 m, and high charge resolution of approximately $1/60$. The detector system includes a position-sensitive ionization chamber, time-of-flight detectors, and silicon strip detectors, providing reliable identification of reaction products by their mass number $A$ and atomic number $Z$. The optical properties of the analyzer were studied using the MAVRPC code and confirmed experimentally. The possibility of operating in gas-filled mode for heavy ion studies is also discussed.