A study of the particle acceleration mechanism in the electric field of the thunderclouds

为了观察雷暴云中粒子加速的证据，我们从2010年2月起在羊八井国际宇宙线观测站（中国西藏）安装了两台大气电场仪。我们观察了大气电场的强度和粒子的计数率（即，γ射线或电子）的闪烁计数器。初步分析表明，我们探测到的许多事件都显示出电场变化与粒子计数率之间的强相关性。我们继续观察，以增加这种相关性的证据，并在未来分析数据。

To observe the evidence that particles in the thundercloud are accelerated, we installed two atmospheric electric field meter at the Yangbajing international cosmic ray observatory (Tibet, China) since February, 2010. We have observed the strength of the atmospheric electric field and the counting rate of particles (i.e., gamma rays or electrons) by a part of scintillation counters in the Tibet air shower array. We detected many events that show strong correlation between the electric field variation and the counting rate of particles under our preliminary analysis. We continue the observation to increase the evidence of this correlation and analyze data in the future.