实现γ射线激光之路

发布时间：2018-04-04 18:51

本文选题：激光中的量子电动力学　切入点：量子自由电子激光　出处：《科学通报》2017年30期

【摘要】：分析了形成激光的诸要素,统一地理解了普通(以原子、分子或凝聚态物质为介质的)激光和自由电子激光的运作机制.由此认识了实现γ射线激光的困难和解决办法,即让带电粒子在普通激光中摆动,再配以适当的"共振"和"抽运"机制.为了进行精确可靠的分析我们建立了激光中的量子电动力学.她与真空中的量子电动力学等价,因此是当今最可靠的物理理论.由此明确得出的结论是,一束适当能量的单能直线前进的电子与一束单色平面波普通激光迎面相撞将产生γ射线激光,称为量子自由电子激光.当然,这是理想条件下的理论结论.然而协同学(synergetics)告诉我们,在实际条件逼近理想条件的过程中会有一临界点,越过这一点,诱致辐射的正反馈会导致一雪崩式的过程,电子束与普通激光碰撞产生的γ射线束遂相变为γ射线激光.
[Abstract]:Analysis of the factors of the laser, unified understanding of the common (with atoms, molecules or condensed matter medium) operation mechanism of laser and free electron laser. Thus know the realization of gamma ray laser difficulties and solutions, that charged particles swing in ordinary laser, coupled with the appropriate "resonance" and "pump" mechanism. For we established quantum electrodynamics in a laser. Accurate and reliable analysis of quantum electrodynamics in the vacuum and the equivalent of her, so is the most reliable physical theory. The clear conclusion is that a proper single energy electron with a monochromatic straight forward the plane wave laser collided will produce gamma ray laser, called quantum free electron laser. Of course, this is the theoretical conclusion under ideal conditions. However Synergetics (Synergetics) tells us that in the actual conditions approaching There is a critical point in the process of conditioning. Beyond this point, the positive feedback induced by radiation will lead to an avalanche process, and the phase transformation of the gamma ray beam generated by the electron beam to the ordinary laser will be transformed into a gamma ray laser.

【作者单位】：北京大学物理学院;核物理与核技术国家重点实验室;
【基金】：国土资源部公益性行业科研专项(sino-probe0903)资助
【分类号】：TN24

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