Speaker
Description
The High-Intensity Heavy-ion Accelerator Facility (HIAF) is a leading platform for heavy-ion scientific research in China. Currently, several significant physics experiments are being constructed at HIAF, including the Electron-Ion Collider in China (EicC), the All-Silicon High Energy Spectrometer, and the High Energy Fragment Separator (HFRS). The Monolithic Active Pixel Sensors (MAPS) are extensively utilized in these projects, especially for vertex and tracking detectors. This presentation will focus on the recent progress in MAPS development for the physics terminals at HIAF.
The Nupix-A series sensors are specifically designed for vertex detectors and provide accurate position measurements. The latest generation of the A-series features a 128 x 128 pixel array with a pixel pitch of 30 μm. It includes a Digital-to-Analog Converter (DAC) array with an SPI interface, as well as Digital Control logic that operates at 40 MHz. Preliminary tests indicate that this sensor achieves an Equivalent Noise Charge (ENC) of ~30 e-. With a pixel size of 30 μm, it can provide a spatial resolution of ~5 μm.
To address the requirements of multi-dimensional measurements, including position, time and energy, we have developed the H-series based on the GSMC 130 nm quadra-well process. The latest generation sensor of the H-series has a total size of approximately 2.3 cm × 1.5 cm, containing a pixel array of 256 × 448. Each pixel measures 45 μm × 45 μm, which is expected to provide a spatial resolution of better than 10 μm. Each pixel can measure energy deposition up to 15 ke- with the Equivalent Noise Charge (ENC) of ~ 50 to 100 e-. Furthermore, this MAPS supports continuous readout with a novel reset scheme for each super-pixel, allowing for a time resolution of better than 10 ns.
