Computer Studies on Cluster Impact Phenomena

集群撞击现象的计算机研究

基本信息

  • 批准号:
    03650266
  • 负责人:
  • 金额:
    $ 1.02万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
  • 财政年份:
    1991
  • 资助国家:
    日本
  • 起止时间:
    1991 至 1992
  • 项目状态:
    已结题

项目摘要

In order to investigate the interaction of an ionized cluster beam with solids, we have developed the time-evolution Monte Carlo simulation codes DYACOCT(1) and DYACAT(2). The DYACAT code can be applied to the investigation of the cluster-impact phenomenon in an amorphous solid, and the DYACOST code to that in a crystalline solid. In these programs which are based on the binary collision approximation, trajectories of ions and recoil atoms are followed dynamically. In order to overcome the difficulties of the binary collision approximation of a low-energy projectile, many body encounter are numerically solved by the molecular dynamics method, where a projectile collides at the same time with many atoms within its collision diameter. These codes can be successfully applied to the radiation damage(3), the cluster-impact phenomenal(4-11), and sputtering due to cluster impacts(11). The energy property of cluster atoms (acceleration effect) was studied in Refs.4, 5 and 10, and the depth pro … More files of cluster atoms(clear-the-way effect) in Refs. 8 and 9.It is found that the acceleration effect as well as the clear-the-way effect strongly depend on the mass ratio of the cluster atoms (M_1) and the target atom (M_2). In the case of M_<21>M_1 >1 the high-energy tail of the energy distribution of cluster atoms due to big cluster impacts (n>100) can be well described in terms of the Maxwell-Boltzmann function, and its temperature is linearly proportional to the cluster energy and the cluster size. Namely, the big cluster impact produces a quasi-equilibrium state after a certain time which depends on the cluster-target combination. The acceleration of the state after a certain time which depends on the cluster-target combination. The acceleration of the cluster atom is roughly estimated by the Fermi-shuttle process.In the case of M_<21>M_1 < 1 the clear-the-way effect is cleary observable. The recoil atoms clear the way for aftercoming cluster atoms, and the stopping power of the cluster atom is effectively reduced, and so the projected range of the cluster atoms is several times larger than of the monoatomic ion bombardment, and the energy spectrum of the cluster atom is trapezoidal. In the case of the high-energy light atom cluster impact, there is no clear-the-way effect, and its projected range is less than that of monoatomic ion due to the enhanced energy removal from the surface. Less
为了研究电离团束与固体的相互作用,我们开发了时间演化蒙特卡罗模拟程序DYACOCT(1)和DYACAT(2)。DYACAT程序可用于研究非晶态固体中的团簇碰撞现象,DYACOST程序可用于研究晶态固体中的团簇碰撞现象。在这些基于二元碰撞近似的程序中,离子和反冲原子的轨迹是动态跟踪的。为了克服低能弹丸二元碰撞近似的困难,用分子动力学方法数值求解了多个物体碰撞,即弹丸同时与其碰撞直径内的多个原子发生碰撞。这些程序可以成功地应用于辐射损伤(3)、团簇撞击现象(4-11)和由于团簇撞击而产生的溅射(11)。文献4、5和10研究了原子团簇原子的能量性质(加速效应),深度PRO…参考文献中有更多的原子团簇文件(开路效应)。结果表明,原子团簇原子(M_1)与靶原子(M_2)的质量比对加速效应和让路效应都有很强的依赖性。在M_&lt;21&gt;M_1&gt;1的情况下,团簇大碰撞(n&gt;100)引起的团簇原子能量分布的高能尾可以用Maxwell-Boltzmann函数很好地描述,其温度与团簇能量和团簇尺寸成线性关系。也就是说,大的团簇撞击在一定的时间后会产生准平衡状态,这取决于团簇-靶的组合。状态在一定时间后的加速,取决于簇-靶的组合。用费米穿梭过程粗略地估计了团簇原子的加速度。在M_&lt;21&gt;M_1&lt;1的情况下,清除效应是清晰可见的。反冲原子为后续的团簇原子扫清了道路,有效地降低了团簇原子的阻挡能力,使团簇原子的射程比单原子离子轰击的射程大几倍,团簇原子的能谱呈梯形。在高能轻原子团簇碰撞的情况下,由于表面能量去除的增强,其投影距离小于单原子离子,没有遮挡效应。较少

项目成果

期刊论文数量(11)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
山村 泰道: "クラスタ-イオンビ-ム照射のシミュレ-ション" 真空.
Yasumichi Yamamura:“簇离子束照射的模拟”真空。
  • DOI:
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    0
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Y.Yamamura T.Muramoto: "Time-Evolution MC Simulation of a few 100ev/atom Cluster Impacts" Rad.Eff.Cryst.Defects.
Y.Yamamura T.Muramoto:“几个 100ev/atom 簇影响的时间演化 MC 模拟”Rad.Eff.Cryst.Defects。
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    0
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  • 通讯作者:
Y.YAMAMURA T.MURAMOTO: "Depth profiles due to Big cluster Impacts" Phys.Rol.Lett.69. 1463-1466 (1992)
Y.YAMAMURA T.MURAMOTO:“由于大星团影响而产生的深度剖面”Phys.Rol.Lett.69。
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    0
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  • 通讯作者:
山村 泰道他: "イオン工学の基礎" 内田老鴨鳳,
Yasumichi Yamamura 等人:《离子工程基础》Rokaho Uchida,
  • DOI:
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    0
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Y.YAMAMURA T.MURAMOTO: "Time-Evolution MC Simulation of a few 100ev/atom Cluster Impacts" Red.Ett.Crystal Depects.
Y.YAMAMURA T.MURAMOTO:“几个 100ev/atom 簇影响的时间演化 MC 模拟”Red.Ett.Crystal Depects。
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    0
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YAMAMURA Yasunori其他文献

YAMAMURA Yasunori的其他文献

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{{ truncateString('YAMAMURA Yasunori', 18)}}的其他基金

Computer Simulation of Culster Implantation
簇植入的计算机模拟
  • 批准号:
    09650071
  • 财政年份:
    1997
  • 资助金额:
    $ 1.02万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Computer Studies of Culster Implantation
集群植入的计算机研究
  • 批准号:
    05650318
  • 财政年份:
    1993
  • 资助金额:
    $ 1.02万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
Computer Studies on Interactions of Ionized Cluster Beam With Solids
电离簇束与固体相互作用的计算机研究
  • 批准号:
    01550254
  • 财政年份:
    1989
  • 资助金额:
    $ 1.02万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)

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  • 批准号:
    567755-2022
  • 财政年份:
    2022
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