基于CMOS器件的专用放大电路设计

随着国家大科学工程兰州重离子加速器冷却储存环(HIRFL-CSR)建成，CSRm实验探测系统也正在建设当中。CSRm实验探测系统具有多种探测器数万个探测单元。对于这样先进的探测器和大型实验探测系统采用传统的电子学仪器和方法已经无法构成读出电子学系统和数据获取系统，对前端读出电子学系统、数据获取系统提出更高的要求。因此，采用专用集成电路芯片(ASIC)构成前端读出电子学系统是最可行的方法。本论文所述的基于MOS管的专用放大电路设计正是基于集成电路（ASIC）芯片构建前端读出电子学系统的前期研究子部分。作为ASIC前端读出电子学研究的一部分，本论文主要阐述基于MOS器件的放大电路的研究，主要包括以下内容： 1、设计及实现基于CMOS管的电荷灵敏前置放大器，最后给出制作PCB板后的实验室调试结果； 2、设计仿真基于DMOS管的电荷灵敏前置放大器，对仿真结果进行讨论； 3、利用集成电路设计软件Tanner Pro实现电荷灵敏前置放大器的物理版图设计

Sol-gel preparation and luminescence properties of nano-structured hybrid materials incorporated with europium complexes

Microporous silica gel has been prepared by the sol-gel method utilizing the hydrolysis and polycondensation of tetraethylorthosilicate (TEOS). The gel has been doped with the luminescent ternary europium complex Eu(TTA)(3)(.)phen: where HTTA=1-(2-thenoyl)-3,3,3-trifluoracetone and phen=1,10-phenanthroline. By contrast to the weak f-f electron absorption bands of Eu3+, the complex organic ligand exhibits intense near ultraviolet absorption. Energy transfer from the ligand to Eu3+ enables the production of efficient, sharp visible luminescence from this material. Utilizing the polymerization of methyl methacrylate, the inorganic/polymer hybrid material containing Eu(TTA)(3)(.)phen has also been obtained. SEM micrographs show uniformly dispersed particles in the nanometre range. The characteristic luminescence spectral features of europium ions are present in the emission spectra of the hybrid material doped with Eu(TTA)(3)(.)phen.

Preparation and luminescence properties of sol-gel hybrid materials incorporated with europium complexes

Microporous silica gel has been prepared by the sol-gel method utilizing the hydrolysis and polycondensation of tetraethylorthosilicate (TEOS). The gel has been doped with the luminescent ternary europium complex Eu(TTA)(3). phen: where HTTA = 1-(2-thenoyl)-3,3,3-trifluoracetone and phen = 1,10-phenanthroline. By contrast to the weak f-f electron absorption bands of Eu3+, the complex organic ligand exhibits intense near ultraviolet absorption. Energy transfer from the ligand to Eu3+ enables the production of efficient, sharp visible luminescence from this material. Utilizing the polymerization of methyl methacrylate or ethyl methacrylate, the inorganic/polymer hybrid materials containing Eu(TTA)(3). phen have also been obtained. SEM micrographs show uniformly dispersed particles in the nanometre range. The characteristic luminescence spectral features of europium ions are present in the emission spectra of the hybrid material doped with Eu(TTA)3 phen. (C) 2000 Kluwer Academic Publishers.

Luminescence of uranium-doped strontium tetraborate (SrB4O7)

The luminescence and excitation spectra of uranium doped into strontium berate, SrB4O7:U, are reported. The emission spectrum is similar to the structureless green ''uranate' luminescence. The excitation spectrum is assigned to transitions from oxygen-derived orbitals to uranium 5f and 6d orbitals. (C) 1997 Elsevier Science Ltd. All rights reserved.