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首页> 外文期刊>Japanese Journal of Applied Physics. Part 1, Regular Papers, Brief Communications & Review Papers >The Response of the silicon-based Linear Energy Transfer Spectrometer (RRMD-Ⅲ) to Protons from 1 to 70 MeV
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The Response of the silicon-based Linear Energy Transfer Spectrometer (RRMD-Ⅲ) to Protons from 1 to 70 MeV

机译：硅基线性能量转移谱仪（RRMD-Ⅲ）对1到70 MeV质子的响应

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摘要

Experiments have been performed to measure the response of the silicon-based linear energy transfer (LET) spectrometer (RRMD-Ⅲ) to protons with energies ranging from 1 to 70 MeV. The beam energies incident upon RRMD-Ⅲ were obtained using plastic polycarbonate degraders with mono-energetic proton beams that were extracted at 70, 40 and 25 MeV from a cyclotron. The energy loss in the degraders never exceeded 70% of the incident energy in order that the energy spread of the emerging protons created by straggling and scattering effects could be suppressed. Estimates of the LET were influenced by the asymmetric energy distribution of the degraded beam. Protons with energies less than 12.2 MeV did not reach the second Si detector in RRMD-Ⅲ and were not measured. Measured values of LET were within ±7% of the expected value for incident protons that had an energy sufficient to penetrate the second Si detector in RRMD-Ⅲ (E > 15.4 MeV). The LET of stopping particles was computed using a lookup table listing LET vs E, and a simple stopping power formula for a particle with charge Z and energy E_R, where E_R is the energy of the stopping particle measured in the second Si detector.
机译：已经进行了实验，以测量基于硅的线性能量转移（LET）光谱仪（RRMD-Ⅲ）对能量在1到70 MeV之间的质子的响应。使用具有单能质子束的塑料聚碳酸酯降解器，以70、40和25 MeV的速度从回旋加速器中提取入射到RRMD-Ⅲ的束能量。降解剂中的能量损失从未超过入射能量的70％，以便可以抑制因散布和散射效应而产生的新兴质子的能量扩散。 LET的估计受退化光束能量分布的不对称影响。能量小于12.2 MeV的质子未到达RRMD-Ⅲ中的第二个Si检测器，因此未进行测量。 LET的测量值在入射质子的预期值的±7％范围内，该质子的能量足以穿透RRMD-Ⅲ中的第二个Si检测器（E> 15.4 MeV）。使用列出了LET vs E的查找表以及带电荷Z和能量E_R的粒子的简单停止功率公式，计算了停止粒子的LET，其中E_R是在第二个Si检测器中测得的停止粒子的能量。

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