Development of Imaging Camera for Ultra High Energy Cosmic Rays

众所周知，宇宙线的能量谱最大可达10^&lt；20&gt；eV。这些宇宙射线起源于银河系外，但要用著名天体(AGN、射电星系等)的加速度来解释它们的能量并不容易。为了确定这些宇宙射线的来源，精确的能谱测量和化学成分的研究是必不可少的。下一代探测器必须具备这些能力。当高能宇宙射线到达大气时，它们与大气中的原子核(空气簇射)相互作用，产生许多次级粒子。X&lt；max&gt；(最大淋浴深度)的测量为我们提供了有关化学成分的信息。我们正在计划望远镜阵列项目，它拥有高分辨率的成像设备和比目前用于探测高能宇宙线的探测器大得多的口径。在本研究项目中，我们研制了用于此目的的成像装置--64路多阳极光电倍增管，并取得了成功的结果。

It is well known that the energy spectrum of cosmic rays extends up to 10^<20>eV.These cosmic rays are extra-galactic origin, however, it is not easy to explain their energy with the acceleration at well known astronomical object (AGN,Radio Galaxy, and so on). In order to identify the source of these cosmic rays, the accurate measurement of energy spectrum and the study of chemical compositions are essential. The next generation detector must have these capabilities.When the high energy cosmic rays hit the atmosphere, they produce many secondary particles by interacting with the neuclei of atmosphere (Air shower). The measurement of X_<max> (the depth of the shower maximum) give us the information about the chemical composition. We are planning the telescope array project, which has the high resolution imaging devices and much large aperture than the current detectors for the detection of high energy cosmic rays. In this research project, we have developped the imaging device for this purpose, multi anode photomultipliers of 64ch, and obtained successful results.