| 1. | The simulation of ionic radial density in high intensity ion beam
强流离子束离子径向密度分布的模拟研究 |
| 2. | Effect of controllers on ionic radial density of high intensity ion beam
控制信息对强流离子束径向密度分布的影响 |
| 3. | To improve the level of automation in accelerator control of china institute of atomic energy , an advanced network control system about low - energy high ion - current device was designed and realized
摘要为了提高中国原子能科学研究院串列加速器控制的自动化水平，设计并实现了一种先进的低能强流离子束网络控制系统。 |
| 4. | Archaeologists and nuclear physicists are working together to measure the passage of muons , subatomic particles from deep space , through the 2 , 000 - year - old pyramid of the sun to discover the mysteries of the pre - aztec teotihuacan civilisation
目前，考古学家和核物理学家们正在利用宇宙射线探测器的介子束在太阳金字塔底深处进行勘测，希望能解开这座金字塔的秘密以了解扑朔迷离的狄奥提瓦康古城。 |
| 5. | One involves the radiation hardening technique of electronic devices aboard on spacecraft for extremely high energy protons with low flux existed in the environment of space ; the other is related to the thermal - mechanical effects of materials under the exposure of high - energy intense - current proton beams
本文主要研究了空间飞行器抗辐射加固研究中涉及的高能质子辐射效应问题和强流质子束辐照引起的热?力学效应问题。 |
| 6. | In addition , researchers have shown that low - cost laser accelerators are suitable for many of the same applications as conventional accelerators , such as producing short - lived radioisotopes used in medical diagnostics and generating neutron and positron beams for studies of materials
此外，研究人员也证明，在许多应用上，廉价的雷射加速器都跟传统加速器有同样的功用，例如用来产生医学诊断用的短生命期放射性同位素，或制造检测物质用的中子与正子束。 |
| 7. | The calculated results show that , for low energy protons ( energy less than several decade mev ) , the contribution of proton nuclear reaction to energy deposition can be neglected ; while for high energy protons ( energy greater than several hundred mev ) , the great difference appears for the above two cases . this gives us an indication that the contribution of proton nuclear reaction to the energy deposition must be concerned for high - energy protons . the propagation process in material of thermal shock wave induced by high - energy intense - current pulsed proton beam irradiation is calculated for several different proton energies
对于入射能注量为418 ( j cm ~ 2 )脉冲宽度为0 . 1 s的矩形脉冲强流质子束，计算结果表明，由于质子束能量不同，引起的初始热激波( 0 . 1 s时刻的热激波)有单峰结构，也有双峰结构，不同能量的强流质子束引起的热激波在传播的过程中都会出现明显的弹性前驱波。 |
| 8. | The control of beam halo - chaos becomes a critical problem in the development of high intensity accelerator . efforts to remove the halo by collimation have been largely unsuccessful since the halos almost always regenerate . the mechanisms of halos are complex , such as nonlinear resonances and chaotic behavior etc . considering this , professor fang jin - qing who works in china institute of atomic energy pointed out that the theory of chaos control can be used to control beam halos . he presented the method to control halos by using nonlinear functions , which means nonlinear function g is added to the right of ion radial self - edlctric force equation and some nonlinear function are selected to control beam halos in simulations . in paper [ 69 ] , controllerg = - 0 . 15sin ( rmax - am ) 2 was used and the halo intensity was decreased to 0 . 1078 , the halos are removed partly
束晕?混沌的控制是新一代强流加速器研制的关键问题，随着强流离子束应用前景的日趋广阔而日益成为研究的热点。传统机械限束器因无法解决束晕的再生而收效甚微，因为束晕的形成有着其内在动力学机制?非线性共振以及混沌等。基于此，中国原子能科学院研究员方锦清将混沌控制的理论和方法开创性的运用于束晕?混沌的控制上，提出了控制束晕?混沌的非线性控制策略，即在粒子径向所受束自生场力方程的右边加上非线性控制函数g ：并选取一些非线性函数如等进行了控制的模拟研究，将束晕强度控制在0 . 1078左右，取得了初步的控制效果。 |
| 9. | By using the classical monte - carlo method , the splitting process of the guided atomic beam in the beam splitter is simulated , and the transverse adiabatic cooling and heating effects of the atomic beam in the beam splitter are simulated and analyzed from a simple theoretical model
同时，采用经典的monte - carlo方法，模拟了该原子分束器中被导引原子束的分束过程，研究了导引过程中原子束的横向绝热冷却和加热效应，并采用简单的理论模型解释了上述monte - carlo结果，得到了一些重要并且十分有趣的结果。 |
| 10. | The radiation shielding and single event upset ( seu ) of semiconductor components induced by high - energy low - flux and the thermal - mechanical effects of materials resulting from the high - energy intense - current proton irradiation are extensively studied , following conclusions are achieved : the characteristics of space radiation environment and the potential radiation effects are investigated systematically
利用本文编制的程序，着重研究了高能质子的辐射屏蔽问题、单粒子效应中的单粒子翻转seu 、强流质子束辐照材料引起的热?力学效应等问题，从而为以后的相关研究提供了数值模拟手段。论文的主要进展有：系统地总结分析了空间辐射环境的构成、特点及其可能产生的辐射效应。 |
