透射鏡式調(diào)相聚焦激光加速器和自由電子激光器
LENS TYPE PHASE ADJUSTABLE FOCUSING LASER ACCELERATOR
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摘要: 正 (一)引言 自六十年代初第一臺激光器問世以來,人們就期望用高功率激光的強(qiáng)電場加速帶電粒子,提出了各種不同的設(shè)想,但迄今沒有成功。最近,彭桓武等提出用聚焦在軸上的快波加速電子的新方案,但這個方案要用一個光柵進(jìn)行調(diào)相,一個光柵產(chǎn)生一級衍射波使電子加速,在工藝結(jié)構(gòu)上相當(dāng)復(fù)雜困難。本文,根據(jù)幾何光學(xué)原理,在
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關(guān)鍵詞:
Abstract: This paper suggests a new a scheme for a laser aecelerator according to the principle of geometrie opties. A lens with special non-spherical surface is used to focus the laser rays onto the axis. The phase of these rays can be continuously adjusted as the electrons move forward along the axia, so that the constant acceleration of electrons lis achieved. Because the focusing factor lis very large, the electrons can obtain a very high energy gain on a very short length of travel. When the electrons are decelerated, it is possible to realize a free electron laser. Finally, we prove that it is impossible to use a focusing mirror in this scheme. -
T. Takeda and I. Mutsui, Nuel. Instr. Meth., 62(1968), 306.[4]A.Ranofsky, Rev. Sci. Instrum., 48(1977), 34.[5]R. Rossmanith, Nucl. Instr. Meth., 154(1978), 29.[6]彭桓武、莊杰佳,中國科學(xué),1979年,第10期,第953頁.[7]尹元昭、葉桂木、陳遠(yuǎn)星,激光,7(1980), 51.[8]尹元昭,激光,6(1979), 1. -
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