C-caronerenkov radiation from a finite trajectory of electrons.
C-caronerenkov radiation from a finite trajectory of electrons.
复制标题
来自电子有限轨迹的 C-caronerenkov 辐射。
DOI：
10.1103/physreve.50.4041
复制
发表时间：
1994
期刊：
影响因子：
--
通讯作者：
Y. Fujita
中科院分区：
文献类型：
--
作者：
T. Takahashi;T. Kanai;Y. Shibata;K. Ishi;M. Ikezawa;T. Nakazato;M. Oyamada;S. Urasawa;T. Yamakawa;K. Takami;T. Matsuyama;K. Kobayashi;Y. Fujita
在可见光和毫米波范围内，实验研究了相对论电子在氦气和氮气中通过有限长的L轨道在不同气压下的辐射特性。辐射是由直线加速器产生的短束电子产生的。在长波区，遮挡了ifmmodeCheck{C}\Else\v{C}\FI{erenkov阈值，即使满足NG1条件，观测到的辐射也表现出跃迁辐射的特征。在考虑地层带的基础上，提出了可供选择的判据\ensuremath{\beta}(n-\ensuremath{\lambda}/L)g1。
Properties of radiation emitted by relativistic electrons traveling through a limited trajectory of length L in helium and nitrogen gas at various pressures are experimentally investigated in the visible and the millimeter-wave regions. The radiation was generated by short bunches of electrons from a linear accelerator. In the long-wavelength region the \ifmmode \check{C}\else \v{C}\fi{}erenkov threshold was blotted out, and the observed radiation showed characteristics of transition radiation even if the \ifmmode \check{C}\else \v{C}\fi{}erenkov criterion \ensuremath{\beta}ng1 was fulfilled. An alternative criterion \ensuremath{\beta}(n-\ensuremath{\lambda}/L)g1 is proposed on the basis of the consideration of the formation zone.