Direct observation of plasma-lens effect.
Direct observation of plasma-lens effect.
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直接观察等离子体透镜效应。
作者：
Nakanishi;Yoshida;Ueda;Kozawa;Shibata;Nakajima;Kurihara;Yugami;Nishida;Kobayashi;Enomoto;Oogoe;Newberger;Tagawa;Miya;Ogata
对18 MeV圆形电子束等离子体透镜进行了实验研究，该透镜是基于静止等离子体对粒子束空间电荷的屏蔽而产生的自聚焦。采用差分抽运技术将等离子体室与直线加速器加速管分离。结果表明，过密等离子体成功地聚焦电子束。另一个发现是等离子体似乎减少了横向发射度。
A plasma lens for 18-MeV round-shaped electron beams was experimentally studied; the lens is based on self-focusing due to shielding of the space charge of a particle beam by a quiescent plasma. A differential pumping technique was applied to separate the plasma chamber from the linac acceleration duct. It is shown that overdense plasmas successfully focus the electron beams. Another finding is that the plasmas appear to reduce the transverse emittance.