兰州重离子加速器冷却贮存环计划简介

１　兰州重离子加速器现状及发展设想兰州重离子加速器（ＨＩＲＦＬ）现有系统包括电子回旋共振（ＥＣＲ）离子源、注入器（ＳＦＣ）及主加速器（ＳＳＣ）。该系统可以提供能量为１０ｋｅＶ／ｕ～１００ＭｅＶ／ｕ，从Ｃ到Ｔａ的低中能重离子束。１９９４年５月３日，成功...     

具有持久磁场的ToreSupra中用D2ICRF锻炼清洗第一壁和控制 …

在超导磁聚变装置中持久磁场的应用障碍了用大多数脉冲装置中实际使用的辉光放电来进行锻炼，为此，在具有３．８Ｔ持久磁场ＴｏｒｅＳｕｐｒａ中研究了一种替代的方法，由离子回旋频率范围（ＩＣＲＦ）波注入产生放电，ＨｅＩＣＲＦ放电锻炼（ＩＣＲＦ－ＤＣ）已经证明，能有效地氘饱和和碳的第一壁去饱和，在本文，我们描述了Ｄ２ＩＣＲＦ－ＤＣ如何能用于清洗器壁，或改变其氢同位素比，这已通过抽走由ＩＣＲＦ等离子体粒子轰击产     

铀冶金炉渣的破坏性分析及对NDA分析仪器SGS和AWCC的校验

为了校验非破坏性分析（ＮＤＡ）仪器——分段γ扫描吸收装置（ＳＧＳ）和有源中子井型符合计数装置（ＡＷＣＣ）的准确性，采用流动注射（ＦＩＡ）、高效液相色谱（ＨＰＬＣ）和Ｘ光荧光（ＸＲＦ）３种破坏性分析方法（ＤＡ）分析了铀冶金炉渣中铀的含量。结果表明：３种方法的分析数据符合良好，得到了铀冶金炉渣中铀含量的准确量值。核对了非破坏性分析仪器ＳＧＳ和ＡＷＣＣ分析铀冶金炉渣的结果。     

加速器电磁元件设计微机软件库的初步研制

描述了加速器电磁元件设计的微机软件库初步研制工作,包括ＰＯＩＳＳＯＮ／ＳＵＰＥＲＦＩＳＨ、ＲＥ－ＬＡＸ３Ｄ、ＴＲＡＮＳＰＯＲＴ、ＲＡＹＴＲＡＣＥ、ＭＡＤ、ＰＡＲＭＥＬＡ系统软件和软件包括移植、开发、以及自行开发的软件ＤＥ２Ｄ、ＤＥ３Ｄ、ＣＹＣＣＡＥ、ＣＹＣＣＥＮ的整理工作。介绍了这些软件在一定实际工程中的应用情况。     

STUDY ON RESIDUES OF ~（14）C－FENITROTHION IN MODEL RICE－FISH ECOSYSTEM AND FIELD RICE－FISH ECOSYSTEM

ＳＴＵＤＹＯＮＲＥＳＩＤＵＥＳＯＦ~（１４）Ｃ－ＦＥＮＩＴＲＯＴＨＩＯＮＩＮＭＯＤＥＬＲＩＣＥ－ＦＩＳＨＥＣＯＳＹＳＴＥＭＡＮＤＦＩＥＬＤＲＩＣＥ－ＦＩＳＨＥＣＯＳＹＳＴＥＭＺｈａｎｇＺｈｏｎｇｌｉａｎｇ（张仲良）；ＷａｎｇＨｕａｘｉｎ（王化新）；Ｇ?..     

STUDY ON LUNG DOSE FOR DIFFERENT ANIMALS BY INHALATION OF SHORT－LIVED RADON DAUGHTERS

ＳＴＵＤＹ　ＯＮ　ＬＵＮＧ　ＤＯＳＥ　ＦＯＲ　ＤＩＦＦＥＲＥＮＴ　ＡＮＩＭＡＬＳ　ＢＹ　ＩＮＨＡＬＡＴＩＯＮ　ＯＦ　ＳＨＯＲＴ－ＬＩＶＥＤ　ＲＡＤＯＮ　ＤＡＵＧＨＴＥＲＳＬｉＳｕｙｕｎ，ＺｈａｎｇＳｈｅｎｇｈｕｉａｎｄＨｏｕＨａｉｑｕａｎ（Ｃｈｉｎａ...     

硫对注入YSZ单晶的金属铂在退火过程中结晶的影响

秀卢瑟福背散射－沟道技术（ＲＢＳ－Ｃ）和Ｘ射线衍射技术（ＸＲＤ）研究了Ｐｔ和注入ＹＳＺ（Ｙ２Ｏ３稳定的ＺｒＯ２）后产生的损伤和退火过程中损伤的恢复及注入Ｐｔ的晶化，ＲＢＳ－Ｃ分析表明ＹＳＺ室温下的存在较强自退火效应，ＸＲＤ分析结果示出硫以铂的晶化产生很大影响。     

STUDY ON OCCURENCE FORM OF PLATINUM IN XINJIE Cu－Pt DEPOSIT BY NAA AND SCANNING PROTON MICROPROBE

ＳＴＵＤＹＯＮＯＣＣＵＲＥＮＣＥＦＯＲＭＯＦＰＬＡＴＩＮＵＭＩＮＸＩＮＪＩＥＣｕ－ＰｔＤＥＰＯＳＩＴＢＹＮＡＡＡＮＤＳＣＡＮＮＩＮＧＰＲＯＴＯＮＭＩＣＲＯＰＲＯＢＥＬｉＸｉａｏｌｉｎ，ＺｈｕＪｉｅｑｉｎｇ，ＧｕＹｉｎｇｍｅｉ，ｗｕＸｉａｎＫａｎｇ（Ｓ...     

STUDIES ON RADIATION INDUCED CROSSLINKING OF CIS 1，4－POLYBUTADIENE BY ~（13）C NMR

ＳＴＵＤＩＥＳ　ＯＮ　ＲＡＤＩＡＴＩＯＮ　ＩＮＤＵＣＥＤ　ＣＲＯＳＳＬＩＮＫＩＮＧ　ＯＦ　ＣＩＳ　１，４－ＰＯＬＹＢＵＴＡＤＩＥＮＥ　ＢＹ　~（１３）Ｃ　ＮＭＲＺｈａｏＸｉｎ；ＤｕＹｏｕｒｕａｎｄＹｅＣｈａｎｈｕｉ（ＬａｂｏｒａｔｏｒｙｏｆＭａｇｎｅ?..     

直通道磁元件磁场测量

为使重离子束从注入器（ＳＦＣ）不经主加速器（ＳＳＣ）直接传输到实验终端。最近在兰州重离子研究装置（ＨＩＲＦＬ）上新建了直通管道系统。在该系统中有３台偏转磁铁和３台四极透镜。本文叙述了它们的测磁内容和方法，给出了激磁曲线、径向和轴向场分布、磁场梯度、等效长度等结果。结果表明：全部符合原设计要求，并有一定的余量。     

Transmission efficiency improvement of the injector line of SFC by particle beam decorrelation

The operation of the HIRFL accelerator has shown that the beam transmission efficiency of the sector focusing cyclotron(SFC) injector line is rather poor. Beam simulations have been performed to investigate the possible causes for this low transmission. It is predicted that the property of transversal coupling of the ion beam from electron cyclotron resonance(ECR) ion source can be an important factor to degrade the beam quality by increasing the beam emittance, resulting in a serious particle loss. An improved operation scheme for the SECRAL associated line has been proposed, and the corresponding experiment was carried out. This paper presents the test results.     

ECR离子源实验台的研制

介绍了ECR离子源实验台的工作原理、基本结构和研制过程。作为实验和测试平台,ECR离子源实验台可以很方便的调整离子源各参数,在靶上得到好的束流品质。通过对部件的改进和调试,解决了束流较小的问题,使ECR离子源工作在最佳状态。上述结果可用于中子发生器的运行调试。因此,ECR离子源实验台是强中子发生器所必需的实验设备。与国内外的ECR离子源相比,ECR离子源实验台主要着眼于中子发生器的模拟实验,在结构上强调小型化、实验平台化,在功能上要求能够在线测量许多重要参数。测量结果表明,ECR离子源实验台技术指标达到设计要求。     

电子回旋共振离子源永磁体的优化设计

对永磁电子回旋共振(Electron cyclotron resonance,ECR)离子源磁场运用Poisson程序进行了模拟计算,将模拟计算结果和测量结果进行了比较.依据计算结果,设计加工了NdFeB(钕铁硼)永磁体,得到了比较好的磁场场形,并在ECR离子源调试中获得了较强的束流.     

全永磁ECR离子源研究进展

ECR(电子回旋共振)离子源是产生稳定的强流多电荷态离子束流最有效装置.全永磁ECR离子源因其独特的特点为很多中小型多电荷态离子束流实验平台与离子注入机等系统所采用,为后者产生重复性好、稳定性强的多电荷态离子束流.本文着重论述了中国科学院近代物理研究所研制的几台全永磁多电荷态ECR离子源及其特性与典型性能,如能产生强流高电荷态离子束流的高性能全永磁离子源LAPECR2,能产生强流中低电荷态离子束流的LAPECR1,能产生多电荷态重金属离子柬流的LAPECRl-M等.这些性能稳定的离子源为提高近代物理研究所相关试验平台的性能提供了关键的束流品质保障.     

On abnormal behaviors of ion beam extracted from electron cyclotron resonance ion thruster driven by rod antenna in cross magnetic field

In a 2.45 GHz electron cyclotron resonance(ECR) ion thruster powered with rod antenna under a cross magnetic field, abnormal behaviours such as sudden drop of ion beam current(Ib) and larger increasing-rate of Ibin the high microwave power(Pw) discharges at high gas flow rates were observed. A differential method was proposed to reveal the changes in the radial profiles of gray values extracted from the end-view discharge images. The increasing-rate of Ibwith respect to Pwwas used to evaluate efficiencies of ion production and transport. Analyses indicate that discharges are dominantly sustained by ordinary wave via electron heating in the electron plasma resonance layer that can shift along the rod-antenna, and extraordinary wave can only ignite a discharge in the ECR layer in the low gas flow rate regime. In terms of the confinement region defined by the magnetic field lines intercepting with the screen grid, the confinement region of the optimized 2.45 GHz cross magnetic field takes the shape of hourglass, enabling the high increasing-rate of I_b with respect to P_w in high power discharges at high gas flow rates.Correlated with the accompanied bright boundary layer appearing in the differentiated image, the sudden drop of I_b in the low gas flow rate regime is attributed to the discharge ignited by the enhanced extraordinary wave in the ECR layer neighbouring the narrowest confinement region,where the produced ions can promptly enter the loss region.     

Numerical simulation program of multicomponent ion beam transport from ECR ion source

In order to research multi-component ion beam transport process and improve transport efficiency, a special simulating program for ECR beam is becoming more and more necessary. We have developed a program written by Visual Basic to be dedicated to numerical simulation of the highly charged ion beam and to optimization of beam dynamics in transport line. In the program the exchange of electrons between highly charged ions and low charged ions or neutral atoms (residual gas in transport line) is taken into account, adopting classical molecular over-barrier model and Monte Carlo method, so the code can easily give the change of charge state distribution along the transmission line. The main advantage of the code is the ability to simultaneously simulate a large quantity of ions with different masses and charge states, and particularly, to simulate the loss of highly charged ions and the increase of low charged ions due to electron exchange in the whole transport process. Some simulations have been done to study the transmission line of LECR3 which is an ECR ion source for highly charged ion beam at IMP. Compared with experimental results, the simulations are considered to be successful.     

The ORNL ECR multicharged ion source

A multicharged ion source based on electron cyclotron resonance (ECR) heating has been designed and built at ORNL. The ECR ion source, which is completely dedicated for atomic physics collisions studies, produces higher charge states and higher beam intensities than the present ORNL PIG multicharged ion source, and will thus permit study of collision processes involving ions of higher charge states in experiments requiring higher beam intensities than could be previously obtained in our laboratory. The source has already produced up to fully stripped C and O beams, as well as up to He-like Ar beams. Measurements of the energy spread of ions extracted from the ion source operating in both single-stage and two-stage mode are described. In addition, initial results of total cross section measurements for fully stripped light ions incident on atomic hydrogen in the energy range 0.2–10 keV are presented.     

用于硼中子俘获治疗的强流质子回旋加速器中心区结构优化设计

中国原子能科学研究院目前正在研制用于硼中子俘获治疗（BNCT）的强流质子回旋加速器,该加速器设计引出能量14 MeV、质子束流强大于1 mA。相比引出流强为400 μA的PET回旋加速器,BNCT强流质子回旋加速器对中心区相位接收度和轴向聚焦的要求更高。为实现mA量级的束流的加速和引出,BNCT强流质子回旋加速器采取了增加负氢束流注入能量、增大磁铁镶条孔径、使用用于增大Dee盒头部张角的阶梯状结构及调整加速间隙的入口和出口高度等一系列中心区结构优化设计,有效地提高了中心区的相位接收度,改善了轴向电聚焦。在新的离子源注入能量下通过数值计算得到实测场下的轴向电聚焦和间隙高度的关系,选取合适的间隙高度获得最佳的轴向聚焦,从而确定了mA量级束流的注入和加速的中心区结构。同时在设计中考虑空间电荷效应的影响,计算了不同流强下的束流尺寸变化。中心区结构在实测磁场下的优化设计计算结果表明,BNCT强流质子回旋加速器中心区的束流对中好于0.5 mm,相位接收度大于40°,中心区最高可接收流强3 mA。目前,新的中心区结构已进入机械加工阶段。     

CIAE强流ECR离子源研制

本文介绍了研制的一台强流ECR微波离子源,其能从7 mm直径的圆孔引出大于150 mA的氢离子束(75 keV),质子比达90%。该离子源采用独特的结构提高了离子源寿命。离子源在75 keV、110 mA束流条件下连续工作超过220 h,束流中断2次,不间断工作时间超过150 h。     

双频加热的LECR3离子源设计及初步的调试

研制成功了一台新的ECR（Electron Cyclotron Resonance）离子源LECR3（Lanzhou ECR No.3）。该离子源能为原子核物理与表面物理研究提供高电荷态离子束流，LECR3的设计主要基于IMP（Institute of Modern Physics）的14.5GHz ECR离子源（Lanzhou ECR No.2），但采用了双频加热、波导直接馈入微波功率及铝制等离子体弧腔等新技术和新方法。另外，LECR3的弧腔容积比LECR2的大，增加可注入的微波功率，可有效地增加引出的高电荷态离子束流的强度。虽然增大了弧腔的内么，但仍然保持径向六极磁铁在弧腔内壁上产生最大磁场强度与LECR2的同样大小。