Generation and Acceleration of GeVelectrons using Ultra-intense Laser

使用超强激光产生和加速 GeV 电子

• 批准号: 09480092
• 负责人: KITAGAWA Yoneyoshi
• 金额: $ 8.51万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09480092/
• 关键词: Laser wakefield acceleration; Self-modulated wakefield; Ultra-intense laser; Gas jet; Raman scattering; Electron spectrometer; Longitudinal field; Gas puff; 電子ビーム; フォトカソード; レーザー航跡場加速

The purpose of this project is to excite large amplitude self-modulated wakefield in a gas jet plasma using an ultra-intense laser and then to accelerate electrons to more than 100 MeV.So that we have constructed an ultra- intense laser system and gas jet system.We now deliver 18 Joule on target energy in 0.4ps pulse width, leading to 6x 1018W/cm^2.We also developed a laser-synchronized pulse power machine, from which we can get 1.1-2.6 MeV electrons synchronized to A YAG laser within 1.2ns jittel ;By injecting the Ultra-intense laser into the gas jet plasma, we observed both the forward Raman scattering and the side scattering. From these signals, we estimated that the amplitude of the plasma wave is 35% in density perturbation and the longitudinal field is lOOGV/m. The data suggests the electron acceleration to more than 100 MeV.Now we are measuring the energy spectrum of the accelerated electrons using a magnetically analyzing electron spectrometer.

本项目的目的是利用超强激光在气体喷射等离子体中激发大幅度自调制尾波场，然后将电子加速到100 MeV以上，从而构建了一个超强激光系统和气体喷射系统。我们现在以0.4ps的脉冲宽度向靶能量输送18焦耳，产生6×1018W/cm~2。我们还研制了一台激光同步脉冲功率机，可以在1.2 ns吉特尔内获得1.1-2.6 MeV的电子与A-YAG激光器的同步；通过向气体喷射等离子体注入超强激光，我们观察到了前向拉曼散射和侧向散射。根据这些信号，我们估计等离子体波的幅度为密度微扰的35%，纵场为10GV/m，数据表明电子加速到100 MeV以上。现在，我们用磁分析电子能谱仪测量了加速电子的能谱。

项目成果

Yoneyoshi Kitagawa: "30TW Laser Plasma Interactions at ILE,Osaka" Fusion Engineering and Design(Elsevier Science Ltd). (1998)

Yoneyoshi Kitakawa：“大阪 ILE 的 30TW 激光等离子体相互作用”融合工程与设计（Elsevier Science Ltd）。

北川米喜: "プラズマにおける加速現象の基礎・ビ-ト波の基礎" プラズマ・核融合学会誌. 73. 1087-1100 (1997)

米木北川：“等离子体加速现象和拍波的基础”日本等离子体与核聚变学会杂志 73. 1087-1100 (1997)。

森道昭,北川他: "Ultra-intense glasslaser system and laser-plasma interactions" Nuclear Instruments & Methods in fhysics Research. A410. 367-372 (1998)

Michiaki Mori, Kitakawa 等人：“超强玻璃激光系统和激光等离子体相互作用”核仪器和方法物理研究 A410 (1998)。

児玉了祐他: "Development of a tardimensional space-resolved high speed sampling camera" Review of Scientific Instruments. 70. (1998)

Ryosuke Kodama 等人：“焦平面空间分辨高速采样相机的开发”科学仪器评论 70。（1998 年）

西原功修他: "Hydrodeponic Perturbation Growth in Start up Phase in Laser Inplosion" Physics of Plasmas. 5. 1945-1952 (1998)

Kosuke Nishihara 等人：“激光爆炸启动阶段的水电微扰生长”等离子体物理学。5. 1945-1952 (1998)