发明名称 |
Modified Faraday cup |
摘要 |
A tomographic technique for measuring the current density distribution in electron beams using electron beam profile data acquired from a modified Faraday cup to create an image of the current density in high and low power beams. The modified Faraday cup includes a narrow slit and is rotated by a stepper motor and can be moved in the x, y and z directions. The beam is swept across the slit perpendicular thereto and controlled by deflection coils, and the slit rotated such that waveforms are taken every few degrees form 0 DEG to 360 DEG and the waveforms are recorded by a digitizing storage oscilloscope. Two-din-tensional and three-dimensional images of the current density distribution in the beam can be reconstructed by computer tomography from this information, providing quantitative information about the beam focus and alignment.
|
申请公布号 |
US5554926(A) |
申请公布日期 |
1996.09.10 |
申请号 |
US19950509552 |
申请日期 |
1995.07.31 |
申请人 |
REGENTS OF THE UNIVERSITY OF CALIFORNIA |
发明人 |
ELMER, JOHN W.;TERUYA, ALAN T.;O'BRIEN, DENNIS W. |
分类号 |
G01R19/00;(IPC1-7):G01R13/00 |
主分类号 |
G01R19/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|