荧光光纤光栅传感特性的实验研究

在载氢掺铒光纤上写入Bragg光纤光栅，得到新型光子学器件-荧光光纤光栅.分别对其Bragg波长（λB）及荧光寿命（τ）的温度（T）及应变（ε）响应特性进行了实验研究，并且给出了λB和τ分别关于（T，ε）的拟合方程.实验结果表明：荧光光纤光栅的λB对T和ε的响应具备一般Bragg光纤光栅的优良特性，测得温度灵敏度为11.1pm /℃，应变灵敏度为1.19pm/με；而且τ对T和ε的响应也具有良好的线性关系，温度灵敏度为0.59 μs/℃，应变灵敏度为6.16 ns/με.实验结论为解决温度应力交叉敏感、实现温度应力的同时监测提供一条新颖的途径.     

SECRAL等离子体韧致辐射谱的测量

The axial emitted bremsstrahlung spectra were measured on SECRAL(Superconducting ECR ion source with Advanced design in Lanzhou)using an HPGe detector.The spectral temperature T_(spe) was obtained from the linear fit of the spectra in the semi-log present.The evolution of T_(spe) with microwave power and magnetic field configuration is investigated in this paper.     

燃煤电厂烟气元素汞检测技术的研究进展

燃煤电厂烟气治理引发了社会各界关注,汞由于其剧毒性和生命体易富集性一直以来是烟气检测中最重要的元素之一。EPA、MESA、HEST和OHM等传统取样检测技术采样困难和抗干扰能力弱限制了其应用。近年来,基于光谱法和化学传感器技术建立的在线检测技术发展显著。光谱法精度高,应用广泛,但操作复杂且仪器昂贵。化学传感器检测技术具有高选择性、操作简单和价格低廉等优点受到广泛关注。本文以检测汞为目的,介绍了目前主要的取样检测技术和在线检测技术,并对未来的汞检测技术的发展方向进行了展望。     

一台用于空间状态模拟的紧凑型质子源

A compact proton beam source for space simulation has been developed.A compact structure was designed in order to meet the special requirements of miniaturization.Some particular means have been adopted for improving the proton portion and beam transmission at a long distance.The experimental results showed that 8mA/30keV proton beam can be successfully obtained from this source at about 700W input microwave power.     

关于弹性势能的讨论

讨论了当势能零点任意选取时弹性势能的表达式及其取值情况，并对这些情况作了理论上的解释。     

Experimental results of helicon source

Helicon plasma sources are known as efficient generators of uniform and high density plasma. A helicon plasma source was developed for the investigation of plasma stripping and plasma lenses at the Institute of Modern Physics, CAS. In this paper, the characteristics of helicon plasma have been studied by using a Langmuir four-probe and a high plasma density up to 3.9× 10^13/cm^3 has been achieved with the Nagoya type III antenna. In the experiment, several important phenomena were found： （1） for a given magnetic induction intensity, the plasma density became greater with the increase of RF power; （2） helicon mode appeared at RF power between 300 W and 400 W; （3） the plasma density gradually tended to saturation as the RF power increased to the higher power; （4） a higher plasma density can be obtained by a good match between the RF power and the magnetic field distribution. The key issue is how to optimize the matching between the RF power and the magnetic field. Moreover, some tests on the extraction of ion beams were performed, and preliminary results are given. The problems which existed in the helicon ion source will be discussed and the increase in beam density will be expected by extraction system optimum.     

LAPECR2离子源在320kV高压平台上的试运行

The high charge state all permanent Electron Cyclotron Resonance Ion Source(ECRIS)LAPECR2 (Lanzhou All Permanent magnet ECR ion source No.2)has been successfully put on the 320kV HV platform at IMP and also has been connected with the successive LEBT system.This source is the largest and heaviest all permanent magnet ECRIS in the world.The maximum mirror field is 1.28T(without iron plug)and the effective plasma chamber volume is as large as (?)67mm×255mm.It was designed to be operated at 14.5GHz and aimed to produce medium charge state and high charge state gaseous and also metallic ion beams.The source has already successfully delivered some intense gaseous ion beams to successive experimental terminals.This paper will give a brief overview of the basic features of this permanent magnet ECRIS.Then commissioning results of this source on the platform,the design of the extraction system together with the successive LEBT system will be presented.     

LECR2离子源的改造及初步运行结果

The Latest developed LECR2M (Lanzhou ECR No.2 Modified)source is the updated one of LECR2(Lanzhou ECR No.2)source at IMP.It has been assembled on the low energy ion beam experimental platform to produce MCI beams for atomic physics and material pllysics experimental research.In our updating program,the structure of injection and extraction components has been modified to make the source structure more simple and effective.The hexapole magnet has also been replaced by a new hexapole magnet with higher radial field and larger inner diameter.With this updating,stronger magnetic field confinement of the ECR plasma is possible and better base vacuum condition is also achieved.LECR2M was designed to be operated at 14.5GHz.During the preliminary test.1.3emA O6 beam was extracted with the injected rf power of 1.1kW.The source has been used to deliver intense MCI beams for different experiments.After some discussion of the main features of this newly updated source,some of the typical commissioning test results of LECR2M will be presented.