CSR切割磁铁设计

兰州重离子加速器冷却储存环(HIRFL CSR)由一个主环(CSRm)和实验环(CSRe)构成.两个储存环的束流注入与引出都需要借助于切割磁铁的导向来完成.介绍了CSR的切割磁铁的物理设计和二维场计算. In order to satisfy the requirement of beam injection and extraction of CSR, four magnetic septums will be used in the accelerator. In the design, the shape of the lamination is optimized by 2-D magnetic field calculation. Also, in order to decrease the leakage field and obtain a satisfied field distribution, a special auxiliary coil and a shield iron plate are considered and as well as the construction of the septum leg is treated in a special way. As a result, the leakage field is almost...     

HIRFL-CSR前端总线控制器的改进设计

论述了用于兰州重离子加速器冷却存储环(HIRFL CSR)控制系统的前端总线系统控制器的改进。 改进了控制器的嵌入式操作系统和应用程序, 开发了控制器和数据库交换数据的应用程序。 该控制器基于BGA封装的ARM920T(ARM9)处理器和嵌入式的LINUX操作系统, 可以连接标准的VGA显示器、 键盘、 鼠标, 采用了现场可编程的FPGA器件进行背板接口设计, 并具有64 mA高驱动能力的总线驱动器, 以及拥有灵活的接口信号定义可编程能力, 是HIRFL CSR控制系统的关键部件。 The EVME bus controller which is a key component of the HIRFL CSR control system was improved . Besides reconfiguring the embedded Linux, a utility program was developed for data exchange between the controller and the database. The bus controller is based on ARM920T(ARM9) micro processor which is BGA packaged. The bus controller has the universal interface of VGA display, keyboard, and mouse. The backboard interface logic is programmed in an in system configurable FPGA device. The bus can drive high current up to 64 mA, with the flexibility of the programmable signal definitions. All the improved performance helped the EVME bus controller play a crucial role in HIRFL CSR control system.     

CSR二极磁铁积分磁场测量系统

介绍了兰州重离子加速器冷却储存环(HIRFL CSR)积分磁场测量系统以及积分测量的基本原理和数据处理方法,对测量结果的分析表明整个系统运行可靠稳定,可用于CSR磁铁的积分测量.This article presents the basic principle of dipole integral magnetic field measurement . The integral coil which has the same radius with the dipole magnets was used to measure the integral magnetic field of different magnets in Cooler Storage Ring(HIRFL CSR). The article also generally introduced the software and hardware systems of the automatic measurement device. According to the repetitive experiments, a suit of better measurement got to be summarized. On the other hand, the article recommends the...     

Schottky探针研制与测试研究

利用Schottky质谱仪进行远离β稳定线核质量测量研究是九五国家大科学工程兰州重离子加速器冷却储存环上的一个重要研究方向. 简要分析了Schottky探针的工作原理和利用 Schottky质谱仪进行质量测量, 给出了对用于HIRFL CSR束流诊断与测量的Schottky探针的研制与测试结果. he mass measurement of the nuclides far from the β stability by using Schottky mass spectrometry is an important aspect of the studies on HIRFL CSR. The principle of Schottky pick up and the method and prospect of Schottky mass spectrometry are also briefly analyzed. The Schottky pick up designed for the system of diagnostics and measurement of HIRFL CSR and also the test results are given.     

Step Motor Control System

All kinds of step motors and servomotors are widely used in CSR control system, such as many vacuum valves control that set on the HIRFL-CSR; all kinds of electric switches and knobs of ECR Ion Source; equipment of CSR Beam Diagnostics and a lot of large equipment like Inside Gun Toroid and Collector Toroid of HIRFL. A typical control system include up to 32 16-I/O Control boards, and each 16-I/O Control board can control 4 motors at the same time (including 8 Limit Switches).     

兰州重离子冷却储存环工程

兰州重离子加速器冷却储存环是兰州重离子研究装置的后续工程 .它的建造目的是将重离子束的能量提高到 1 Ge V/u附近 ,同时利用储存环电子冷却技术将束流品质提高一个数量级 ,并提供更多种类的重离子束 ,以开展更广范围和更高精度的物理实验 .兰州重离子加速器冷却储存环是一个双储存环系统 ,由一个主环和一个实验环构成 .对其总体布局、总体参数、主要功能进行了介绍. HIRFL- CSR, a new accelerator project at the Heavy Ion Research Facility in Lanzhou (HIRFL), is a multipurpose Cooling Storage Ring system which consists of a main ring (CSRm) and an experimental ring (CSRe). Beams from HIRFL will be accumulated and accelerated in CSRm, and then transported to CSRe for internal target experiments. The layout, major parameters and main functions of the CSR were described.     

HIRFL能区与CSR能区高能γ实验

介绍了在兰州重离子加速器装置（HIRPL）上开展的原子核巨共振实验研究,并对以后在HIRFL与冷却储存环CSR上可以开展的一些高能γ实验,如双声子态实验、轫致辐射实验、集体运动消失与相变关系等作了一些讨论． The experiments on giant dipole resonance performed at HIRFL of the Institute of Modern Physics are reviewed. At HIRFL and CSR the prospective high energy gamma experiments on double phonon state, Bremstrahlung, the connection between disappearance of collective motion and phase transition, and so on, are also discussed.     

Suppression of the emittance growth induced by coherent synchrotron radiation in triple-bend achromats

The coherent synchrotron radiation (CSR) effect in a bending path plays an important role in transverse emittance dilution in high-brightness light sources and linear colliders, where the electron beams are of short bunch length and high peak current. Suppression of the emittance growth induced by CSR is critical to preserve the beam quality and help improve the machine performance. It has been shown that the CSR effect in a double-bend achromat (DBA) can be analyzed with the two-dimensional point-kick analysis method. In this paper, this method is applied to analyze the CSR effect in a triple-bend achromat (TBA) with symmetric layout, which is commonly used in the optics designs of energy recovery linacs (ERLs). A condition of cancelling the CSR linear effect in such a TBA is obtained, and is verified through numerical simulations. It is demonstrated that emittance preservation can be achieved with this condition, and to a large extent, has a high tolerance to the fluctuation of the initial transverse phase space distribution of the beam.     

CSR空间电荷效应的研究

针对兰州重离子加速器冷却储存环的流强设计 ,对其空间电荷效应进行了讨论 .随着流强增高和发射度降低 ,束流自作用场效应 (空间电荷效应 )逐渐显现 .散焦的空间电荷力造成的粒子自由振荡频移和束流包络增长 ,带来了不稳定因素 ,这些不稳定因素就限定了储存环的流强极限.Cooler Storage Ring (CSR), an upgrading program planned at the Heavy Ion Research Facility in Lanzhou (HIRFL), will supply beams with higher quality and intensity. Space charge effects should be considered due to this magnitude of intensity in CSR. The concept and some phenomena of space charge effects are discussed. Space charge intensity limit and space charge tune shift of normal CSR operation are given. It is of significance for the construction and operation of the future facility.     

HIRFL-CSR主环加速腔系统设计

正在建设中的兰州重离子加速器冷却储存环 ( HIRFL- CSR)的主环加速腔系统用于将累积的重离子束流进行加速 .其频率范围为 0 .2 5 - 1 .7MHz,峰值电压为 8.0 k V.重点介绍了主环加速腔系统的设计及主要高频参数 ,包括高频腔体的设计及低电平控制部分的设计. An ion cooler storage ring HIRFL CSR is constructing at Institute of Modern Physics(IMP). It consists of two rings--main ring (CSRm) and experimental ring (CSRe). For the CSRm, two RF systems will be employed. One is for RF stacking, and another is for beam accelerating. The designed parameters of CSRm accelerating system and the control block diagram of RF system are described. The RF accelerating system has a specification of lower and wider frequency range from 0.25 to 1.7 MHz...     

HIRFL与CSR的匹配研究

国家重大科学工程HIRFLCSR冷却储存环计划主环CSRm利用已有的HIRFL作为注入器,为了更好地利用HIRFL加速器的能力,对这两台加速器的匹配在原来的初步考虑的基础上进行了较为详细的研究,提出了分别利用HIRFL自己的注入器SFC单独注入到CSR以及SFC加上主加速器SSC注入到CSR的两套方案,既可以提高HIRFL与CSR的总传输效率,又可以在SFC与CSR联合运行的同时使SSC与另建的小回旋加速器组合加速质子,从而充分提高HIRFL的运行效率.     

HIRFL改造中的加速器物理问题

从加速器运行的角度对兰州重离子加速器 HIRFL建成以来所存在的问题进行了总结 ,结合放射束物理和冷却储存环 CSR对 HIRFL的新要求 ,从加速器的物理设计方面提出了一些改进方案 .主要问题有 :超低能束流传输的空间电荷效应的影响 ,扇聚焦回旋加速器 SFC高频加速电压不对称对束流轨道的影响 ,用半频聚束的方式补偿两台回旋加速器的纵向不匹配 ,前束线上聚束器的工作模式的选取 ,强杂散磁场对超低能和低能束流传输的影响 ,分离扇回旋加速器 SSC注入区过垫补磁场对注入束流轨道的影响 ,SFC和 SSC的单圈引出 ,重离子通过剥离膜后的束流损失和束流品质的变坏等.From the viewpoints of the HIRFL operation and the new requirements to HIRFL by the study of radioactive beam physics and CSR project, the HIRFL upgrading program has been proposed after studying the existing problems found during the operation and new problems when increasing the beam intensιty and ion variety. The accelerator physics problems of the upgrading program were discussed here, which include the space charge effect on the very low energy beam line...     

HIRFL改造中的加速器物理问题

从加速器运行的角度对兰州重离子加速器 HIRFL建成以来所存在的问题进行了总结 ,结合放射束物理和冷却储存环 CSR对 HIRFL的新要求 ,从加速器的物理设计方面提出了一些改进方案 .主要问题有 :超低能束流传输的空间电荷效应的影响 ,扇聚焦回旋加速器 SFC高频加速电压不对称对束流轨道的影响 ,用半频聚束的方式补偿两台回旋加速器的纵向不匹配 ,前束线上聚束器的工作模式的选取 ,强杂散磁场对超低能和低能束流传输的影响 ,分离扇回旋加速器 SSC注入区过垫补磁场对注入束流轨道的影响 ,SFC和 SSC的单圈引出 ,重离子通过剥离膜后的束流损失和束流品质的变坏等.From the viewpoints of the HIRFL operation and the new requirements to HIRFL by the study of radioactive beam physics and CSR project, the HIRFL upgrading program has been proposed after studying the existing problems found during the operation and new problems when increasing the beam intensιty and ion variety. The accelerator physics problems of the upgrading program were discussed here, which include the space charge effect on the very low energy beam line...     

Experimental verification of therapeutic doses for the superficially-placed tumor radiotherapy with heavy ions at HIRFL

Up to now, clinical trials of heavy-ion radiotherapy for superficially placed tumors have been carried out for six times and over 60 selected patients have been treated with 80--100 MeV/u carbon ions supplied by the Heavy Ion Research Facility in Lanzhou (HIRFL) at the Institute of Modern Physics, Chinese Academy of Sciences since November, 2006. A passive irradiation system and a dose optimization method for radiotherapy with carbon-ion beams have been developed. Experimental verification of longitudinally therapeutic dose distributions was conducted under the condition of simulating patient treatment in the therapy terminal at HIRFL. The measured depth-dose distributions basically coincide with the expected ones. These results indicate that the irradiation system and the dose optimization method are effective in the ongoing carbon-ion radiotherapy for shallow-seated tumors at HIRFL.     

重离子治疗计划系统的构想

对重离子柬治癌的优势进行简要的回顾，并着重介绍了用于重离子放射治疗的治疗计划系统。治疗计划系统是一套软件系统，不同的硬件设施应有与其相匹配的软件系统，即治疗计划系统。在此基础上，针对兰州重离子加速器的特点提出一些关于治疗计划系统方面的构想。After a brief review concerning the advantages of heavy ions in radiotherapy, more interests are concentrated on treatment planning system （TPS） for heavy ion radiotherapy. Compared to the hardware devices such as accelerator and beam delivery system, the TPS is a set of software system, and different therapy facilities require their corresponding TPSs. Based on the specialities of the Heavy Ion Research Facility in Lanzhou （HIIRFL）, some suggestions on the TPS for tumor therapy at HIRFL finally are given.     

HIRFL人身安全联锁系统的设计与实现

兰州重离子加速器(简称HIRFL),是我国规模最大、加速离子种类最多、能量最高的重离子研究装置,可提供单核子能量达GeV量级的重离子束。HIRFL运行时,束流会在加速器隧道内产生辐射,需要建立一套人身安全联锁系统来保障人员的辐射安全。HIRFL人身安全联锁系统遵循分区联锁、硬件最可靠、失效保护、冗余及独立性、自锁等设计原则,选用了可靠性高的冗余PLC作为核心控制器,并使用了安全性高的联锁部件。本工作的完成保障了HIRFL工作人员的辐射安全,也为同类型加速器装置的人身安全联锁系统设计提供了参考。     

HIRFL–CSR加速器中束流与真空中剩余气体的碰撞损失

研究了重离子加速器中束流与真空中剩余气体的碰撞损失过程和碰撞截面,在依据大量实验数据的基础上,提出了一组计算离子一原子的电荷交换截面的经验公式.以兰州重离子加速器HDRFL及冷却储存环CSR为例,给出了依据碰撞截面的公式计算束流在加速器真空中的传输效率的方法,并计算了在不同真空度下HIRFL的ECR源轴向注入束运线、注入器SFC、前束运线、主加速器SSC和后束运线等不同加速阶段及CSR的传输效率,并提出合理的真空度要求.HIRFL的真空分布测量和束流的损失测量证明了该计算方法的可靠性.     

HIRFL上合成的第一个新核素—208Hg

本文简述在中科院近物所HIRFL上发现的第一个新核素208Hg的合成和鉴别,兼论利用HIRFL提供的中能重离子束开展远离β稳定线核素合成和衰变研究的优势、困难以及拟采用的物理和技术路线。 The synthesis and identification of the first discovered new nuclide 208Hg on HIRFL(Heavy Ion Research Facility of Lanzhou) were described. In this paper the superiorities, difficultiesas well as the physical and technical line about the synthesis and decay study for the nuclides far fromβ-stability line to be made at HIRFL were discussed.     

储存环内电子冷却过程模拟

考虑储存环内离子的横向振荡和纵向振荡的运动特性,模拟了HIRFL-CSR内重离子束的电子冷却过程.给出了离子束的横向发射度和纵向动量散度随时间连续变化的图象,由此分析了电子束的空间电荷效应,冷却段色散函数和横向电子束温度对冷却过程快慢的影响.