In-Beam Diamond Start Detectors
In-Beam Diamond Start Detectors
复制标题
光束内钻石起始探测器
DOI：
10.1109/tns.2011.2160282
复制
发表时间：
2011
影响因子：
1.8
通讯作者：
A. Schüttauf
中科院分区：
文献类型：
--
作者：
M. Ciobanu;E. Berdermann;N. Herrmann;K. Hildenbrand;M. Kis;W. Koenig;J. Pietraszko;M. Pomorski;M. Rebisz;A. Schüttauf
本文介绍了由化学气相沉积法（CVD）生长的金刚石探测器（DD）和前端电子学（FEE）组成的启动探测器（SD）组件的工作原理和在束性能，该组件已被设计用于达姆施塔特的亥姆霍兹重离子研究中心的各种核物理实验。在FEE设计的同时，我们还进行了大量计算，以模拟信噪比（S/N）和时间分辨率σt对各种参数的依赖性，例如收集的电荷Qcol、检测器电容CD、温度T以及放大器的噪声贡献和带宽。结合新的FEE（包括专用集成电路，ASIC），我们已经测试了各种尺寸和厚度的多晶和单晶金刚石，相对论离子束范围从质子到最重的离子。对于重离子，所有设置都提供时间分辨率σt <; 60 ps。在质子的情况下，小的初级检测器信号需要单晶作为材料和更精细的设计，如检测器区域的分割和放大器输入阻抗的增加。对相对论质子的时间分辨最好为σt = 117 ps。
This paper describes operation principles and the in-beam performance of Start Detector (SD) assemblies consisting of Diamond Detectors (DDs) grown by Chemical Vapour Deposition (CVD) and Front End Electronics (FEE) which have been designed for and used in various nuclear physics experiments at GSI Helmholtz Center for Heavy Ion Research in Darmstadt. In parallel to the FEE design we have performed extensive calculations to model the dependence of the signal-to-noise ratio (S/N) and the time resolution σt on various quantities such as the collected charge Qcol, the detector capacitance CD, the temperature T, and finally the noise contribution and bandwidth of the amplifier. In combination with the new FEEs (including an application-specific integrated circuit, ASIC) we have tested both polycrystalline and single-crystal diamonds of various sizes and thicknesses with relativisticion beams ranging from protons to heaviest ions. For heavy ions all setups deliver time resolutions σt <; 60 ps. In case of protons the small primary detector signals require single crystals as material and more elaborated designs like segmentation of the detector area and the increase of the amplifier input impedance. The best time resolution obtained for relativistic pro tons was σt = 117 ps.