scholarly journals Beam position mismatching and correction of LEB-MEB transfer line

1994 ◽  
Author(s):  
N. Mao ◽  
R. Gerig ◽  
J. McGill ◽  
K. Brown
Keyword(s):  
Beam Position ◽  
Transfer Line

scholarly journals Preliminary Design of the Support Structure for a Rotating Carbon-ion Transfer Line for Medical Applications

Instruments ◽  
2021 ◽  
Vol 5 (4) ◽  
pp. 34
Author(s):  
Diego Perini ◽  
Luca Dassa ◽  
Luca Piacentini ◽  
Stefano Uberti
Keyword(s):  
Superconducting Magnets ◽  
Medical Applications ◽  
Preliminary Design ◽  
Ion Transfer ◽  
Carbon Ions ◽  
Support Structure ◽  
Beam Position ◽  
Carbon Ion ◽  
Transfer Line ◽  
Rotating Structure

The development of new bent superconducting magnets together with the optimization of the support structure open the way to a considerable reduction in the weight and complexity of rotating gantries for medical applications. The magnets, which define the transfer line to deliver carbon ions to the patients from different angles, are supported by a rotating structure that should be as rigid and as lightweight as possible. Relative displacements of the magnets due to deformations cause incorrect beam position and consequent errors in hitting the target tissues. This paper describes a possible rotating structure which is considerably lighter than the previous designs. A method to compensate part of the deformation by complementary rotations of the driving motor is proposed. The influence of the construction tolerances and deformations of the supports is also analyzed and alignment and adjustment possibilities are discussed.

Quantitative x-ray microanalysis and thickness determination using ζ factor

1996 ◽  
Vol 54 ◽  
pp. 580-581
Author(s):  
M. Watanabe ◽  
Z. Horita ◽  
M. Nemoto
Keyword(s):  
Diffusion Couple ◽  
Extrapolation Method ◽  
Thin Specimen ◽  
Beam Position ◽  
X Ray ◽  
Thickness Determination ◽  
Experimental Limitation ◽  
X Ray Absorption

X-ray absorption in quantitative x-ray microanalysis of thin specimens may be corrected without knowledge of thickness when the extrapolation method or the differential x-ray absorption (DXA) method is used. However, there is an experimental limitation involved in each method. In this study, a method is proposed to overcome such a limitation. The method is developed by introducing the ζ factor and by combining the extrapolation method and DXA method. The method using the ζ factor, which is called the ζ-DXA method in this study, is applied to diffusion-couple experiments in the Ni-Al system.For a thin specimen where incident electrons are fully transparent, the characteristic x-ray intensity generated from a beam position, I, may be represented as I = (NρW/A)Qωaist.

XANES Registration by Electron Beam Position Scanning for Time-Resolved Experiment

1997 ◽  
Vol 7 (C2) ◽  
pp. C2-549-C2-552 ◽  
Author(s):  
S. G. Nikitenko ◽  
B. P. Tolochko ◽  
A. N. Aleshaev ◽  
G. N. Kulipanov ◽  
S. I. Mishnev
Keyword(s):  
Electron Beam ◽  
Time Resolved ◽  
Beam Position
Sign in / Sign up

Export Citation Format

Share Document