JES-X310 Electron Spin Resonance Spectrometer

Description

The JES-X310 is a continuous-wave electron spin resonance (ESR) spectrometer designed for sensitive and user-friendly operation. It features a cylindrical TE011 mode resonator with a 15 cm diameter, which can accommodate larger samples and provides uniform modulation. The system's sensitivity is specified as 7 x 10^9 spins per 0.0001 Tesla (10^-4 T) at a 100 kHz modulation frequency. The electromagnet system provides a high homogeneity of 7 x 10^-6. The microwave source utilizes a solid-state Gunn diode element noted for long operational life (over 20,000 hours), stability, and reproducibility. The spectrometer includes an auto-tuned microwave circuit and a built-in frequency counter. Operation is managed through a Windows-based software interface. The magnetic field sweep is linearized via a Hall element detection system. The instrument supports flexible sequential measurement protocols, allowing for automated parameter variation, such as randomized sample temperature or angular rotation, which is useful for advanced experimental designs.