A simple method of producing a focused x-ray beam
A simple method of producing a focused x-ray beam
复制标题
产生聚焦 X 射线束的简单方法
DOI:
10.1117/12.2524167
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Brunetti E
中科院分区:
文献类型:
--
作者:
Brunetti E
One challenge in X-ray optics is how to focus hard X-rays. The possibility of achieving a wide-range of spot sizes would be an advantage for many applications, such as semiconductor lithography, nuclear fusion diagnostics or focused X-ray beams for cancer therapy. Focused X-rays could deliver precise high doses to tumours while sparing the surrounding tissue. Currently, a promising approach is using a Laue lens. However, they are limited by the diffraction capability of crystals and the complex mm-size arrangement of the optical elements. In addition, they are restricted to sub-MeV photon beams, because for higher energies the Bragg condition is not satisfied. We present an efficient and cost-effective method to extend this range up to tens of MeV using an electron-photon converter in the stream of focused high energy electrons. The emerging X-rays follow the trajectories of the electrons and the focus can be simply adjusted by modifying the focus of the electron beam. A bending magnet can be used to remove electrons, if necessary, however a mixed radiation could be an additional option. Our solution can also be adapted to a multiple beam arrangement as an effective alternative to Gamma Knife without the need for handling radioactive sources.
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DOI:
10.1016/j.ejmp.2016.10.003
发表时间:
2016
期刊:
Physica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics
影响因子:
--
作者:
R. Figueroa;M. Santibáñez;Mauro Valente
通讯作者:
Mauro Valente
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
Xin Liu;Hyoung K. Lee
通讯作者:
Hyoung K. Lee
DOI:
--
发表时间:
1982
期刊:
影响因子:
--
作者:
R. Smither
通讯作者:
R. Smither
影响因子:
--
作者:
BETHE, HA
通讯作者:
BETHE, HA
影响因子:
3.5
作者:
R. Figueroa;Mauro Valente
通讯作者:
Mauro Valente