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Parameter Study on Radiation Therapy with Laser-Accelerated Electrons Using a Sharp Density Transition Scheme

机译:尖锐密度跃迁方案的激光加速电子辐射治疗参数研究

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摘要

A parameter study of radiation therapy with laser-accelerated electrons using a sharp density transition scheme was performed via computer simulations. Through particle-in-cell (PIC) simulations, a study of the optimum conditions for the generation of a monoenergetic electron beam was conducted. The beam quality can be controlled by adjusting the laser focal spot size. The charge of the electron bunch is related to the area of the phase mixing region. An electron bunch with the maximum charge was produced in the maximum area of the mixing region in a specific focal spot case. The energy spread of the electron bunch increases with increasing focal spot size owing to the nonlocalized acceleration phase of the wakefield in the larger focal spot case. The transverse bunch size decreases with increasing focal spot size from the narrower transverse size of the ion cavity in the larger focal spot. The dosimetric properties of these very-high-energy electron beams were calculated using Monte Carlo simulations.
机译:通过计算机模拟对使用激光加速电子的放射治疗进行了参数研究,该研究使用了急剧的密度跃迁方案。通过单元中的粒子(PIC)模拟,对产生单能电子束的最佳条件进行了研究。光束质量可以通过调整激光焦点尺寸来控制。电子束的电荷与相混合区域的面积有关。在特定的焦点情况下,在混合区域的最大区域中产生了具有最大电荷的电子束。在较大的焦点情况下,由于尾场的非局部加速阶段,电子束的能量散布随着焦点大小的增加而增加。横向束的尺寸随着焦点尺寸的增加而减小,这是因为较大焦点中离子腔的横向尺寸越窄。这些高能量电子束的剂量学性质是使用蒙特卡洛模拟法计算的。

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  • 来源
    《Japanese journal of applied physics》 |2011年第11issue1期|p.000179-000186|共8页
  • 作者单位

    National Cancer Center, Goyang, Gyeonggi 410-769, Korea;

    National Cancer Center, Goyang, Gyeonggi 410-769, Korea;

    National Cancer Center, Goyang, Gyeonggi 410-769, Korea;

    National Cancer Center, Goyang, Gyeonggi 410-769, Korea;

    National Cancer Center, Goyang, Gyeonggi 410-769, Korea;

    National Cancer Center, Goyang, Gyeonggi 410-769, Korea;

    National Cancer Center, Goyang, Gyeonggi 410-769, Korea,Korea Electrotechnology Research Institute, Ansan, Gyeonggi 1701-19, Korea;

    National Cancer Center, Goyang, Gyeonggi 410-769, Korea,Department of Physics, Chung-Ang University, Seoul 156-756, Korea;

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