ARI-MA ACTIVE INTERROGATION USING RADIATION GENERATED FROM INTENSE LASER PRODUCED ELECTRON BEAMS

ARI-MA 使用强激光产生的电子束产生的辐射进行主动询问

• 批准号: 0833499
• 负责人: Karl Krushelnick
• 金额: $ 36.7万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-15 至 2009-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0833499&HistoricalAwards=false
• 关键词: ARI; MA; ACTIVE; INTERROGATION; USING

ARI-MA: Active Interrogation Using Radiation Generated from Intense Laser Produced Electron BeamsThe high cost and large size of conventional accelerator technology has stimulated a search for new methods of accelerating particles. The objective of this research is to develop compact and efficient radiation sources for active interrogation of objects in order to detect nuclear materials. The approach will be to use radiation sources generated by high power laser produced particle beams.The intellectual merit of the project stems from the novel approach to particle beam generation involving the use of the large electrostatic fields generated by intense laser pulses within plasmas, which can be several orders of magnitude higher than those found in conventional accelerators. These fields are ideal for accelerating electron bunches to high energies over very short distances. In the proposed work, the 300 Terawatt laser facility at the University of Michigan will be used to generate Giga-electronvolt-range energy electron beams which will then be used to generate a high flux of highly directional gamma rays to be used for simultaneous radiography and active interrogation (gamma ray activation) of material. The production of very energetic proton beams from underdense targets will also be investigated which may allow more efficient production of pions and muons.This proposed research may lead to broader impacts since such beams will be of benefit for a wide range of research which presently relies on accelerator technology including biology, materials science and medicine. Both graduate and undergraduate students will participate in this work and efforts will be made to increase public understanding of laser and beam technology as well as to promote diversity.

ARI-MA：利用强激光电子束产生的辐射进行主动询问传统加速器技术的高成本和大尺寸刺激了对加速粒子的新方法的探索。 这项研究的目的是开发紧凑和有效的辐射源，用于主动询问物体，以探测核材料。 该方法将使用由高功率激光产生的粒子束产生的辐射源，该项目的智力优势源于粒子束产生的新方法，该方法涉及使用等离子体中的强激光脉冲产生的大静电场，该静电场可以比传统加速器中发现的静电场高几个数量级。 这些场对于在非常短的距离内将电子束团加速到高能量是理想的。在拟议的工作中，密歇根大学的300太瓦激光设施将用于产生千兆电子伏能量范围的电子束，然后将用于产生高通量的高度定向的伽马射线，用于同时进行射线照相和材料的主动询问（伽马射线激活）。此外，亦会研究从密度不足的靶产生高能质子束，从而更有效地产生π介子和μ介子。这项拟议的研究可能会产生更广泛的影响，因为这种束将有利于目前依赖加速器技术的广泛研究，包括生物学、材料科学和医学。 研究生和本科生都将参与这项工作，并将努力提高公众对激光和光束技术的了解，以及促进多样性。