Design Study of a Coupling RF Cavity for Three-Dimensional Laser Cooling

三维激光冷却耦合射频腔的设计研究

基本信息

项目摘要

The purpose of this project is to develop a novel three-dimensional laser cooling scheme for fast stored ion beams. The main results obtained during the term of the project are :1. It has been numerically demonstrated, with the tracking code "SAD" and molecular dynamics code "SOLID", that longitudinal laser cooling force can be extended to the transverse degrees of freedom of beam motion by employing the resonant coupling method.2. A low-power model of coupling RF cavity was designed and fabricated.3. It has been shown that the storage-ring lattice suitable for beam crystallization must satisfy the following two conditions : (a). the phase advance of betatron oscillation per lattice period is below about 127 degrees, and (b). the beam energy is less than the transition energy of the ring.4. Provided that the above-mentioned conditions are fulfilled, it is possible to produce an ultra-cold beam by means of the resonant coupling method.5. The relation between intra-beam heating rate and the amount of focusing field errors was studied.6. It has been concluded that, in order to stabilize a crystalline beam, a tapered cooling force is necessary.7. In order to generate a tapered light, a possible cooling scheme using multiple lasers has been proposed, and its validity was tested with molecular dynamics simulations.
该项目的目的是开发一种用于快速存储离子束的新型三维激光冷却方案。项目期间取得的主要成果有: 1.利用跟踪代码“SAD”和分子动力学代码“SOLID”数值证明,采用共振耦合方法,纵向激光冷却力可以扩展到光束运动的横向自由度。 2.设计并制作了耦合射频腔的低功耗模型。 3.已经表明,适合束流结晶的储存环晶格必须满足以下两个条件:(a).每个晶格周期的电子感应加速器振荡的相位超前低于约127度,以及(b)。光束能量小于环的跃迁能量。4.只要满足上述条件,就可以利用谐振耦合法产生超冷束。 5.研究了束内加热速率与聚焦场误差量的关系。 6.得出的结论是,为了稳定晶体梁,锥形冷却力是必要的。7.为了产生锥形光,提出了一种可能的使用多个激光器的冷却方案,并通过分子动力学模拟测试了其有效性。

项目成果

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T.Kihara,et al.: "Simulation Study of Three-dimensional Laser Cooling Schemes for Fast Stored Beams"ICR Annual Report. Vol.5. 54-55 (1998)
T.Kihara等人:“快速存储光束三维激光冷却方案的模拟研究”ICR年度报告。
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H.Okamoto: "Simulation Study of halo Formation in Breathing Round Beams" Physical Review. E55 No.4. 4694-4705 (1997)
H.Okamoto:“呼吸圆梁光晕形成的模拟研究”物理评论。
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J.Wei: "Necessary Conditions for Attaining a Crystalline Beam" Physical Review Letters. (発表予定).
J. Wei:“获得晶体光束的必要条件”物理评论快报(即将出版)。
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H. Okamoto, et al.: "Theory of Tapered Cooling"Physical Review E. Vol. 58, No. 3. 3817-3825 (1998)
H. Okamoto 等人:“锥形冷却理论”物理评论 E. 卷。
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T.Kihara,et al.: "The Coupling-Cavity Scheme for Three-Dimensional Laser Cooling"Proc.1997 Particle Accelerator Conf.. 1798-1800 (1998)
T.Kihara 等人:“三维激光冷却的耦合腔方案”Proc.1997 Particle Accelerator Conf.. 1798-1800 (1998)
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OKAMOTO Hiromi其他文献

OKAMOTO Hiromi的其他文献

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{{ truncateString('OKAMOTO Hiromi', 18)}}的其他基金

Control of magnetization with local circularly polarized field induced on metallic nanostructures
利用金属纳米结构上感应的局部圆极化场控制磁化强度
  • 批准号:
    15K13683
  • 财政年份:
    2015
  • 资助金额:
    $ 7.17万
  • 项目类别:
    Grant-in-Aid for Challenging Exploratory Research
Establishment of the basis of laboratory accelerator physics
实验室加速器物理基础的建立
  • 批准号:
    24340053
  • 财政年份:
    2012
  • 资助金额:
    $ 7.17万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Spatio-temporal characteristics and control of coupled excited states in nano-dot arrays
纳米点阵列耦合激发态的时空特征及控制
  • 批准号:
    22225002
  • 财政年份:
    2010
  • 资助金额:
    $ 7.17万
  • 项目类别:
    Grant-in-Aid for Scientific Research (S)
ACCELERATOR-FREE EXPERIMENTS FOR THE PRODUCTION AND STABILIZATION OF NEXT-GENERATION HADRON BEAMDS
用于生产和稳定下一代强子束的无加速器实验
  • 批准号:
    21340061
  • 财政年份:
    2009
  • 资助金额:
    $ 7.17万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Wavefunctions and excited-state dynamics of nanoparticle systems
纳米粒子系统的波函​​数和激发态动力学
  • 批准号:
    18205004
  • 财政年份:
    2006
  • 资助金额:
    $ 7.17万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Realization of the phase transition of a charged particle beams
带电粒子束相变的实现
  • 批准号:
    17340079
  • 财政年份:
    2005
  • 资助金额:
    $ 7.17万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Toward the realization of crystalline beams-----Overall investigation of the fundamental properties of ultracold ion beams-----
迈向晶体束的实现-----超冷离子束基本特性的全面研究-----
  • 批准号:
    14340078
  • 财政年份:
    2002
  • 资助金额:
    $ 7.17万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Structures and Dynamics of Charge-Separated Excited States Studied by Picosecond Infrared Spectroscopy
皮秒红外光谱研究电荷分离激发态的结构和动力学
  • 批准号:
    11440171
  • 财政年份:
    1999
  • 资助金额:
    $ 7.17万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B).
Characteristic Molecular Structures of Electronically Excited Species Studied by Ultrafast Time-Resolved Infrared Spectroscopy in the Fingerprint Region.
通过超快时间分辨红外光谱研究指纹区域电子激发物质的特征分子结构。
  • 批准号:
    09640597
  • 财政年份:
    1997
  • 资助金额:
    $ 7.17万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)

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职业:交流存储环中的激光冷却分子
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    2145147
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星际碳氢化合物分子形成的低温储存环实验
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高功率激光存储环的研制
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    16K17542
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空间电荷主导束中偏振束、中子存储环和包络共振校正的加速器物理。
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