The 300 MeV proton and heavy ion accelerator complex, which is the key part of SESRI (Space Environment Simulation and Research Infrastructure) project, is currently under construction in China. It comprises an 18 GHz high charge-state ion source, a 108.48 MHz cascaded linac injector consisting of a four-rod RFQ and three interdigital H-mode drift tube linacs, a compact synchrotron, and three irradiation terminals. The extensive ion species from proton to 209Bi32+ will be injected into the synchrotron using multi-turn injection method. The third-order resonance and RF-knockout extraction scheme is adopted to provide quasi-continuous spill for irradiation experiments. The general design of the accelerator complex and simulation results are discussed in this paper.

As many diverse accelerator facilities are designed, constructed and operated by IMP (Institute of Modern Physics, Chinese Academy of Sciences), the existing physics control system cannot cover all requirements of these facilities. In order to save the construction time, improve the commissioning efficiency, simplify the operation and reach higher beam intensity and better beam quality, a new physics control system, PACS (Physics-oriented Accelerator Control System), is proposed, designed and implemented in the IMP. With the control layer in three layers, i.e. application layer, physics layer and control layer, the PACS is protocol neutral and can be deployed to all accelerator facilities in the IMP without massive reprogramming. The physics layer encapsulates all physics control processes, including device-level physics and system-level physics, into highly usable interfaces, which makes the development of the application layer and the customized applications simpler, more robust and efficient. Due to the OOP (Object-oriented Programming) technology used in this layer and specific designs, the PACS is highly scalable and can keep pace with the rapidly changing hardware and software. As the application layer is built upon the physics layer interfaces, no matter what is updated in the physics layer, the applications remain unchanged. Many new physics control processes can be tested and implemented in the physics layer by the developers or the users without influencing the operation of these facilities. Now, a version of PACS for miniature facilities is implemented and tested in the CSR, a heavy ion accelerator facility for scientific research in the IMP. It meets the expected goals and provides a solid base for following versions. In the future, the PACS will become a general-purpose physics control system for all heavy ion accelerator facilities.

In this paper the closed orbit correction of the Heavy Ion Medical Machine (HIMM) synchrotron is described. Results of simulations and measurements are presented. Consistently with simulations, it is possible to correct the maximum closed orbit distortion of the HIMM synchrotron down to 2.4mm in the horizontal direction and 0.7mm in the vertical one. The errors of dipole magnets, especially the longitudinal alignment errors (Δs), have large impact on the horizontal correction results. A Singular Value Decomposition (SVD) algorithm is adopted for computing the correction. The residual orbits and the effects of reducing the number of singular values are analytically expressed and simulated. In addition, the influences of BPM reading errors as well as corrector setting errors are analyzed. For further optimization, the method to estimate the dipole errors is studied. In the commissioning, the maximum closed orbits at BPMs can also be well corrected to within 1mm through SVD algorithm.

BRing is the booster ring of the HIAF project in which the beam intensity is designed up to 1.0 × 1011 ppp (238U34+). In order to reach the required intensities, an efficient injection scheme is crucial and the beam loss during injection must not exceed the limits defined by machine protection and dynamic vacuum requirements. An injection scheme called two-plane painting multiturn injection is consequently proposed, which exploits both the horizontal and vertical acceptance of the BRing by a tilted electrostatic septum. The influence of the space charge on the injection process is important for the two-plane multiturn injection scheme which should provide the required intensity with a minimal beam loss. The impact of the space charge on the efficiency of the injection process is investigated using a modified ORBIT code. In order to achieve lower beam loss, the particle swarm algorithm is proposed for a detailed injection optimization with space charge effect. Detailed studies on the two-plane painting multiturn injection scheme and the dependence on the lattice tune, the injected beam current, and the injected beam emittance are also presented. The results provide an important guideline for the design optimization of the injection system for the HIAF-BRing.

Evaluation of transverse impedances and collective instabilities is important for determining whether a transverse feedback system or damping schemes should be prepared in the BRing (Booster Ring) at the HIAF (High Intensity Heavy-ion Accelerator Facility). In this paper, some dominant transverse impedances are estimated to build a transverse impedance model of the BRing. With this model, all potential transverse instabilities and their growth times or rates are analyzed by analytical methods or simulations, and the results agree with each other. The growth times of some instabilities are shorter than the duration times of corresponding manipulations, which shows transverse instabilities may have many detrimental impacts on the BRing. To cure the transverse instabilities, a transverse feedback system will be proposed in the design of the BRing. Besides, this paper not only shows the transverse instabilities in the BRing, but also provides the whole method for estimating them in the design of a new accelerator facility.

The Isochronous Mass Spectrometry (IMS) based on storage rings is a powerful technique for mass measurement of short-lived exotic nuclei. The transition energy γt of the storage ring is a vital parameter of the IMS technique. It is difficult to measure the γt and its relation to momentum spread or circulating length, especially to monitor the variation of γt during experiments. An experimental investigation on the γt has been performed for the IMS experiment at the Cooler Storage Ring of the Heavy Ion Research Facility in Lanzhou (HIRFL-CSRe). With the velocity measured by two time-of-flight (TOF) detectors, the γt as a function of orbital length can be determined. The influences of higher order magnetic field components on the γt function were inferred for isochronous correction. This paper introduces and investigates the influence of dipole magnetic fields, quadrupole magnetic fields and sextupole magnetic fields on the γt function. With the quadrupole magnets and sextupole magnets corrections, a mass resolution of 171332 (FWHM) and σ(T)∕T=1.34×10−6 were reached, which shall be compared with 31319 (FWHM) and σ(T)∕T=7.35×10−6 obtained without correction.

Several solenoids are usually installed in electron cooler device to guide the motion of the electron beam in the cooler. However, the solenoids also have influence to the ion beam in the cooler storage ring. The transverse motion of the ion beam in storage ring will become coupled, if the solenoids installed in the electron cooler are not compensated perfectly. In this paper, the coupled transverse motion due to the uncompensated cooler's solenoids of CSRm (The main storage ring in the IMP, Lan Zhou, China) is studied, and the coupled beam envelopes are calculated by a new method.

用125 MW级双水内冷汽轮发电机、300 MW级双水内冷汽轮发电机的转子绕组水流量计算模型,计算出在不同转速下发电机转子水流量和各分支路水流量的分配情况,并与电厂试验结果进行比较。此研究方法可为汽轮发电机的设计与运行提供依据。

1 前言 2008年下半年,从美国金融危机起引发了全世界经济危机,每次经济危机都要引发一场技术产业革命.今年年初美国总统奥巴马一上台,就提出要发展可再生能源新能源政策和发展智能电网为重要突破口.上海要建设成国际金融、航运二个中心,需要有充足的能源特别是电力供应和环境污染的防治.

与全速发电机相比,用于核电的4极发电机在转子磁路、结构等方面具有特殊性.励磁电流的计算是发电机设计过程中的重要环节.本文用ANsYs有限元软件计算得出1 000 MW级核电发电机的空载及满载励磁电流,计算结果比较合理.结果表明,数值计算方法应用于大容量4级发电机的励磁电流的计算是可行的.对于应用于励磁电流计算的电抗参数进行了分析和讨论.

对4-128×275型百万千瓦级核电4极发电机磁场及励磁电流进行了研究,根据计算结果说明了该型号发电机转子采用单边偏槽结构的设计思想和优点.

1955年我担任汽轮发电机主任设计师.此时,世界范围内汽轮发电机绕组的内冷技术处于飞速发展阶段,发电机的单机容量从原来的10万～30万千瓦,并继续向大容量发展,从而使各国发电能力可快速增长,这一事实是我非常感兴趣的.

The direct-axis synchronous reactance and quadrature-axis synchronous reactance of 4-pole generator of 1000MW grade are researched by FEM(Finite Element Method) in this paper.The magnetic field of rated condition is calculated and the equivalent magnetic permeability is derived.According to the equivalent magnetic permeability,the saturated synchronous reactance is calculated,the result of which is compared with that of unsaturated synchronous reactance.

So far as electric machine manufacturing industry is concerned, in order uo meet power demand due to national economic growth in 21th century, it is necessary to develop high efficiency generating equipment, generating equipment needed by development of new energy resources, new material, new techniques and manufacture of new types of electric machines. This paper briefly describes relationship between economic development and power demand, pointing out that major development directions of large size turbogenerators shall be that not only performance and reliability of turbogenerators should be enhanced and turbogenerators necessary for operation of steam and gas turbine combined cycle should be developed to lower coal consumption, reduce pollution, and enhance availability, much importance must be first of all focused upon development of large size nuclear and fossil generating units and step by step realization of independent design and the increase of proportion of homemade equipment. The major technical factors that may impact development of 1 000 MW class turbogenerators are analyzed. The improvement of special performance capability of large size turbogenerators and monitoring technique used in large size steam turbine generators and progress of cooling technique and superconducting technique are in addition discussed.

本论文就高海拔地区高压发电机定子端部绕组防晕问题进行了理论分析探讨及试验研究.通过采用高介电性绝缘材料对模拟定子绕组端部相间区域等进行处理,相间起晕电压提高到30kV以上,并总结出一套有效可行的端部防晕技术方案.该方案应用于修理电机和新产品电机时能使高压发电机在高海拔(200米以上)环境中运行时达到特殊的防晕要求.

一、概述 吴泾八期工程2×600MW机组,经过设备制造厂、安装公司、设计院、电厂、调研所等单位精诚合作,共同努力,团结造机,至今发电机运行情况良好,未发生过故障.它的顺利投运,标志着上海电站设备自行设计、制造能力进入了一个新的里程碑.

本文主要介绍上海600MW汽轮发电机的设计科研制造运行简况,特别介绍了上海制造的QFSN型600MW汽轮发电机的设计原则、特点、科研工作及试验结果。试验数据表明在引进西屋公司技术600MW汽轮发电机考核机的基础上联合优化设计的600MW发电机,具有很优良的性能和可靠的设计结构。

3 转子系统的振动 转子系统的振动是多样的,其产生故障的形式也是多样的,主要包括转子的弯曲振动(即横振)和扭转振动.图3为某600MW发电机横振、扭振振型图.其中转子的弯曲振动较为复杂,涉及的因素也较多,下面将论述之.