Hi'Beam-S: A Monolithic Silicon Pixel Sensor-Based Prototype Particle Tracking System for HIAF

Particle tracking systems, which function either as particle detectors or beam monitors, are the critical elements for the high-intensity heavy-ion accelerator facility (HIAF) complex. The novel Topmetal-M pixel sensor, which combines the features of both monolithic active pixel sensor (MAPS) and the Topmetal sensor, can be used either for a pixel detector or a nondestructive beam monitor. The Topmetal got its name as some part of the pixel's top metal layer is exposed to sense the drifting charge. In this article, a prototype particle tracking system, named Hi'Beam-S, has been designed to characterize the Topmetal-M sensor. The laser test shows a spatial resolution of similar to 9 mu m for the laser spot measurement. The heavy-ion beam test demonstrates that, for a 5-mm track with a similar to 20 degrees incident angle, a spatial resolution of similar to 1.59 mu m could be achieved.

Automated summary

Particle tracking systems are crucial for the HIAF complex, and the Topmetal-M pixel sensor shows promising performance in research. Both laser and heavy-ion beam tests demonstrate the system's high spatial resolution capabilities.