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物理学报. 2010, 59(1): 199-202.
doi: 10.7498/aps.59.199.
蒙特卡罗模拟单阻止柱双散射体质子束流扩展方法
- 收稿日期: 2009-01-20
- 修回日期: 2009-03-26
- 刊出日期: 2010-01-15
English Abstract
Study of proton beam spreading for a solid beam stopper double scattering method using Monte Carlo simulation
- Received Date:
20 January 2009
- Accepted Date:
26 March 2009
- Published Online:
15 January 2010
Abstract: Beam spreading is the foundation of proton therapy for large area and depth tumor. The characteristics of proton lateral beam distribution for a solid beam stopper double scattering system are investigated using Monte Carlo multi-particle transport code Fluka and the results are compared with analytical computation by using Highland formula under the same conditions. It is found that proton fluence obtained by Fluka is lower than that by analytical computation with Highland formula in the region where the variation in uniformity is ±25% and they coincide better with thin-foil than with thick-foil. For a solid beam stopper double scattering system，as the thickness of foils increases，the radius of beam spreading increases，but the efficiency of beam use age increases firstly and then decreases，the maximum value is about 169%.
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