Precision Study of Son-Linear QED by Observing an Energy-Angular 2D-Distribution

通过观察能量角二维分布来精确研究子线性 QED

• 批准号: 16540274
• 负责人: OMORI Tsunehiko
• 金额: $ 2.37万
• 依托单位: HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16540274/
• 关键词: non linear QED; Compton scattering; Thomson scattering; laser-electron collision; Compton scattering; Thomson scattering; レーザー・電子衝突; laser-electron collision

We successfully observed the angular distribution of X-rays generated through non-linear QED processes.Before our experiment, the E144 experiment at SLAC (USA) was only experiment which observed an effect of on-liner QED (Bula et al., Phys.Rev.Lett.76,3116 (1996)). In this experiment, the energy of recoil electrons were measured and confirmed that it was consistent with prediction of non-linear QED.However energy measurement alone is not sufficient to establish non-linear QED. The theoretical calculation of non-linear QED predict that the angular distribution of X-rays generated by non-linear QED process significantly is different from that of linear QED process. Our experiment firstly observed a characteristic angular distribution of X-rays generated by non-linear QED process. The experiment was performed at a linear accelerator at BNL (USA). A 60 MeV electron beam made collision with a laser beam from a high power CO2 laser. We measured the X-rays created in this collision. A non-linear process creates X-ray which energy is higher than the kinematical limit of the linear process. We used thin silver plate to stop low energy X-rays then observed only high energy X-rays. A CCD detector was used to observed spatial distribution of these high energy X-rays which passed the silver plate. The X-ray shows dumbbell-shaped distribution which is characteristic in prediction of non-linear QED. Those results were published in Physical Review Letters, Laser Physics, and International Journal of Modern Physics.We also developed an apparatus which allows us to perform much high precision measurement. The apparatus consists of a curved multilayer reflector and a X-ray image intensifier. Using this apparatus we can measure both angle and energy distribution at once. The development of the apparatus was successful and we submitted the report of the development to the Nuclear Instruments and Methods in Physics Research.

我们成功地观察到了通过非线性QED过程产生的X射线的角分布。在我们的实验之前，SLAC（美国）的E144实验是唯一观察到在线QED效应的实验（Bula等人，Phys.Rev.Lett.76,3116（1996））。在本实验中，测量了反冲电子的能量，并证实其与非线性QED的预测一致。然而，仅能量测量不足以建立非线性QED。非线性QED的理论计算预测非线性QED过程产生的X射线的角分布与线性QED过程显着不同。我们的实验首先观察到非线性QED过程产生的X射线的特征角分布。该实验是在BNL（美国）的直线加速器上进行的。 60 MeV 电子束与高功率 CO2 激光器发出的激光束碰撞。我们测量了这次碰撞中产生的 X 射线。非线性过程产生 X 射线，其能量高于线性过程的运动学极限。我们用薄银板阻挡低能X射线，然后只观察高能X射线。使用CCD探测器观察这些穿过银板的高能X射线的空间分布。 X射线显示出哑铃形分布，这是非线性QED预测的特征。这些结果发表在《物理评论快报》、《激光物理学》和《国际现代物理学杂志》上。我们还开发了一种设备，使我们能够进行高精度测量。该装置由曲面多层反射器和X射线图像增强器组成。使用该设备，我们可以同时测量角度和能量分布。该装置的研制成功，我们向核物理研究仪器和方法提交了研制报告。

项目成果

Observation of the nonlinear effect in relativistic Thomson scattering of electron and laser beams

• DOI: 10.1134/s1054660x06020101
• 发表时间: 2006-02
• 期刊: Laser Physics
• 影响因子: 1.2
• 作者: T. Kumita;Y. Kamiya;M. Babzien;I. Ben-Zvi;K. Kusche;I. Pavlishin;I. Pogorelsky;D. Siddons;V. Yakimenko;T. Hirose;T. Omori;J. Urakawa;K. Yokoya;D. Cline;F. Zhou

Observation of the second harmonic in Thomson scattering from relativistic electrons

• DOI: 10.1103/physrevlett.96.054802
• 发表时间: 2006-02-10
• 期刊: PHYSICAL REVIEW LETTERS
• 影响因子: 8.6
• 作者: Babzien, M;Ben-Zvi, I;Yokoya, K
• 通讯作者: Yokoya, K

OBSERVATION OF NONLINEAR THOMSON SCATTERING AT BNL-ATF

BNL-ATF 非线性汤姆逊散射观测

• 发表时间: 2007
• 期刊: International Journal of Modern Physics 21
• 作者: 鳥居祥二;山上隆正;他;S.Ohkubo;S.Ohkubo;D.T.Khoa;F.Michel;大久保 茂男;D.T. Khoa;S. Ohkubo;F. Michel;S. ohkubo;F. Michel;D.T.Khoa;大久保 茂男;大久保 茂男;大久保茂男;大久保茂男;T.Sakuda;M.Fukada;F.Michel;T.Sakuda;大久保 茂男;大久保 茂男;M. Fukada;F. Michel;T. Sakuda;M.Fukada;T.Sakuda;S.Ohkubo;F.Michel;F.Michel;T.Sakuda;F.Michel;S.Ohkubo;S. Ohkubo;F. Michel;F. Michel;T. Sakuda;F. Michel;S. Ohkubo;F.Michel;T.Sakuda;F.Michel;S.Ohkubo;大久保 茂男;T.Kumita et al.
• 通讯作者: T.Kumita et al.