The Design and Implementation of On-orbit Data Compression Algorithm for Large Area Silicon Strip Detector

The silicon strip detector (SSD) has the advantages of high position resolution, fast response, low noise, and low power consumption. Since the new century, it has been widely used in space exploration to track incident particles. SSD for the new DArk Matter Particle Explorer-02 (DAMPE-02), whose channel number will be up to five hundreds of thousands, and will generate massive raw data during the data acquisition, must have a fast and efficient data compression solution on orbit. In this paper, a real-time data compression algorithm is proposed, which is based on the FPGA (Field-programmable Gate Array). A pipeline structure in the FPGA is designed for the algorithm, to make the process more parallel and efficiently accelerate the running speed of the algorithm. And finally, the compression velocity, up to 38.4 million channel per second, is achieved. The design idea can provide a reference for the track detector of DAMPE-02.