拟向作者赠送书刊的通知——致本刊2009年各期每篇论文作者的联系人

各有关联系人同志：《光电光谱分析》、《邮票上的光谱学和化学史》等书刊是我们编辑出版的两套丛书（外一本）,如果你认为对你有参考价值的话,可以赠送你两套又一本,或其中一套或一本（邮资自付,可用邮票支付）,有意者可来信告知收件人和详细地址,同时将邮票放在挂号信中寄来。联系地址：北京市延庆石河营东街10号楼201室《光谱实验室》编辑部秦丽娟何霜,邮政编码：102100,电话：（010）52513126,电子信箱（E-mail）：gpss@chinajournal.net.cn。     

用自制探测器检测半导体器件

在物理电学内容的教学中,我引导学生自制了简易探测器用于半导体器件的检测与实验取得了很好的教学效果．     

不确定非线性光电伺服系统滑模自适应控制

针对同时存在参数不确定性和结构不确定性的非线性光电伺服系统,运用自适应原理对系统的参数进行在线估计,同时提出一种改进的指数趋近律,并结合滑模控制（变结构控制）策略设计系统的滑模自适应位置控制器（APR）。以等效正弦1.2sin(0.93t)作为仿真输入,在0.45s后跟踪误差小于60μrad,表明该控制方法对此类不确定非线性系统的控制效果良好。     

基于实时操作系统的光电稳定自适应模糊PI复合控制方法研究

针对经典稳定控制理论存在超调与快速性之间难以调和的矛盾,建立了稳定控制系统数学模型,采用自适应模糊实现控制的快速性,用PI保证系统的稳态精度,以误差为模糊控制的输入,设计一种实用的自适应模糊和PI复合控制系统,并在基于VxWorks实时操作系统的数字平台上得以实现.仿真和试验表明:设计的新型自适应模糊PI复合控制系统超调量为0,调节时间约8 ms,带宽约29 Hz.     

航空稳像光电平台设计

分析了随机振动对调制传递函数的影响,指出角位移是影响航空成像质量的主要因素.研究了特定条件下可容许的MTF下降,并转变为稳定系统的设计参量,用来指导稳像系统的设计.利用空间机构学及平行四边形平动原理,研制了一种新的无角位移减振稳像平台,满足既无角位移又达到减振要求.根据设计理论给出了设计实例,对频率高于100 HZ的振动,衰减达34dB,并利用动力学软件进行测试仿真,仿真曲线验证无角位移减振的正确性,同时对无角位移机构进行光学测试,结果耦合角度小于8″,可以满足航空成像要求.     

量子阱共振腔增强型光电探测器的高功率特性

通过测量1．55Mm量子阱共振腔增强型光电探测器的光电流随反向电压和光功率的变化关系,以及模拟能带结构、电场分布等特性,研究了量子阱共振腔增强型光电探测器的高功率特性．分析了光电流的产生机制,测量了1．064μm量子阱共振腔增强型光电探测器的光电响应,模拟了具有不同势垒高度的量子阱共振腔增强型光电探测器的光电响应．从实验和模拟两方面证明了量子阱的势垒高度是影响量子阱共振腔增强型光电探测器高功率特性的最主要因素．     

Design and test of a Multi-gap Resistive Plate Chamber with Long readout-strip （LMRPC）

A new kind （two end readout） of Multi-gap Resistive Plate Chamber with long readout-strip （LMRPC） is developed to be used at the large-area Muon Telescope Detector （MTD） at mid-rapidity at RHIC/STAR experiment for Time-of-Flight （TOF） measurement. The LMRPC has an active area of 87 cm× 17 cm, 10 gas gaps of 250 μm arranged in 2 stacks, with readout strips of 2.5 cm wide and 90 cm long. The considerations in LMRPC design related to its performance are discussed in this paper. The cosmic ray test results of a prototype LMRPC show a detection efficiency 〉95% and the time resolution -70 ps.     

A new gaseous detector — micro mesh gaseous structure

The structure and working principle of Micromegas （MICRO Mesh Gaseous Structure） is discussed. Some radiation sources of α and X rays are used to test this detector. The optimized electric-field intensity of the conversion gap is obtained. The transmission of electrons and the uniformity of the amplification gap are also presented. The energy resolution of the 5.9 keV peak is better than 27%.     

η-production on the proton via electromagnetic and hadronic probes

The reactions π-p →ηn and γ＇p →ηP are investigated within a dynamical coupledJchannels model of meson production reactions in the nucleon resonance region. The meson-baryon channels included are πN, ηN, π△, σN, and pN. The direct wphotoproduction process is studied within a formalism based on a chiral constituent quark model approach, complemented with a one-gluon-exchange mechanism, to take into account the breakdown of the SU（6）0（3） symmetry. In the models search, the following known nucleon resonances are embodied： Sll （1535）, $11（1650）, Pll （1440）, Pl1（1710）, P13（1720）, D13（1520）, D13（1700）, D15（1675）, and F15（1680）. Data for the π-p →ηnreaction from threshold up to a total center-of-mass energy of W ≈ 2 GeV are satisfactorily reproduced. For the photoproduction channel, two additional higher mass known resonances, P13 （1900） and F15 （2000）, are also considered. However, reproducing the data for γ＇p →ηP requires, within our approach, two new nucleon resonances, for which we extract mass and width.     

Acceptor Concentration Effects on Photovoltaic Response in the La1-xSrxMnO3/SrNbyTi1-yO3 Heterojunction

Photovoltaic response in the heterojunction of La1-x SrxMnO3/SrNby Ti1-yO3 （LSMO/SNTO） is analyzed theoretically based on the drift-diffusion model. It is found that the decrease of acceptor concentration in the La1-xSrxMnO3 layer of hereto junction can increase the peak value of photovoltaic signal and the speed of photovoltaic response, whereas the changing of donor concentration in the SrNby Ti1-yO3 layer has no such evident effect. Furthermore, the result also indicates that the modulation of Sr doping in La1-xSrxMnO3 is an effective method to accommodate the sensitivity and the speed of photovoltaic response for LSMO/SNTO photoelectric devices.