The main scientific goal of the Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) is to monitor various types of Gamma-Ray Bursts (GRB) originated from merger of binary compact stars, which could also produce gravitational wave, and collapse of massive stars. In order to study the response of GECAM Gamma-Ray Detectors (GRDs) to high-energy bursts and test the in-flight trigger and localization software of GECAM before the launch, a portable GRB simulator device is designed and implemented based on grid controlled X-ray tube (GCXT) and direct digital synthesis (DDS) technologies. The design of this GRB simulator which modulates X-ray flux powered by high voltage up to 20 kV is demonstrated, and the time jitter (FWHM) of the device is about 0.9 μs. Before the launch in December, 2020, both two GECAM satellites were irradiated by different types of GRBs (including short and long bursts in duration) generated by this GRB simulator. The light curves detected with GECAM/GRDs are consistent with the programmed input functions within statistical uncertainties, indicating the good performance of both the GRDs and the GRB simulator.

引力波高能电磁对应全天监测仪（GECAM）的主要科学目标是监测源自双致密星合并的各种类型的伽马射线暴（GRB），这些伽马射线暴也可能产生引力波和坍缩的大质量恒星。为了研究GECAM伽马射线探测器（GRD）对高能爆发的响应，并在发射前测试GECAM的飞行触发和定位软件，设计并实现了一种基于网格控制X的便携式GRB模拟器装置。射线管 (GCXT) 和直接数字合成 (DDS) 技术。演示了该 GRB 模拟器的设计，该模拟器调制由高达 20 kV 的高压供电的 X 射线通量，并且该设备的时间抖动 (FWHM) 约为 0.9 μs。在 2020 年 12 月推出之前，两颗 GECAM 卫星都被该 GRB 模拟器产生的不同类型的 GRB（包括持续时间的短脉冲和长脉冲）辐照。GECAM/GRD 检测到的光变曲线与统计不确定性内的编程输入函数一致，表明 GRD 和 GRB 模拟器的良好性能。