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内靶装置是兰州重离子冷却储存环(HIRFL-CSR)实验环的一个重要的插入件,也是世界上第一个嵌入在重离子储存环中的内靶装置,它位于HIRFL-CSR实验环的一个直线段.团簇内靶具有传统外靶所不具备的一些优点,如高亮度、高精度和高灵敏度等.这些优点可使我们在内靶实验平台上进行一些高精度的物理实验.为满足不同物理实验的需求,内靶可以有两种工作模式:非极化靶运行模式和极化靶运行模式,用于为实验环内的物理实验提供厚度为1011~1013atoms/cm2的非极化靶和极化靶.团簇靶是属于非极化靶运行模式,它采用超声喷气和冷凝相结合的方法获得团簇粒子束,并在碰撞靶室中与环内束流相碰撞,未反应的团簇束被收集级抽走.团簇内靶可以提供靶密度约为2×1013atoms/cm2的Ne、Ar、Kr、Xe和N2、CH4等团簇束.目前已完成了团簇靶的现场安装和准直,并进行了真空达标、喷嘴冷却和稳定性等首批测试实验.本文主要介绍团簇靶的工作原理和首批测试实验结果.
The internal target is an important insert for the Lanzhou Heavy Ion Cooled Storage Ring (HIRFL-CSR) experimental ring and the first in the world to be embedded in a heavy ion storage ring, which is located on the HIRFL-CSR Experimental Ring A straight line segment.The intracluster target has some advantages that traditional external targets do not have, such as high brightness, high precision and high sensitivity, etc. These advantages allow us to do some high-precision physics experiments on the target platform To meet the needs of different physical experiments, the target can have two modes of operation: the non-polar target operating mode and the polarized target operating mode, which are used to provide the physical experiments in the experimental ring with a thickness of 1011 ~ 1013 atoms / cm2 of non-polarization Target and polarization target.Cluster target belongs to the non-polarized target mode of operation, which uses a combination of ultrasonic jet and condensation to obtain a cluster particle beam, and in the collision target chamber collides with the ring beam, unreacted Of the cluster beam is evacuated by the collecting stage.The intracluster target can provide cluster beams of Ne, Ar, Kr, Xe, N2, CH4 and the like having a target density of about 2 × 10 13 atoms / cm 2 At present, Site installation and alignment, and a vacuum compliance, nozzle cold The first test experiments and stability. This paper describes the working principle and the first target cluster test results.