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首页> 外文期刊>Proceedings of the Arkansas Academy of Science >Using Geant to Model Calorimeter Response for Electromagnetic Cascades from Nucleus-Nucleus Interactions in a Cosmic Ray Detector
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Using Geant to Model Calorimeter Response for Electromagnetic Cascades from Nucleus-Nucleus Interactions in a Cosmic Ray Detector

机译：使用Geant对宇宙射线探测器中核与核相互作用的电磁级联量热计响应进行建模。

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A scintillating optical fiber calorimeter (SOFCAL) is being developed by NASA/Marshall Space Flight Center for use in balloon-borne experiments to study the spectrum of high-energy cosmic rays and gamma rays. SOFCAL will not saturate for long exposures and the calorimeter will be useful in emulsion chambers to study primary cosmic-ray nuclei with energies from 100 GeV to 1,000 TeV. The event generator FRITIOF was used to model the collision of a cosmic-ray projectile with a target nucleus in an emulsion chamber. The measurements of charged particles from the interaction in the emulsions are related to the energy of the primary cosmic ray nucleus-nucleus interaction, computer simulations of electromagnetic cascades allow computation of the energy ΣE_γ deposited in different regions of the calorimeter. The Monte Carlo program GEANT was used to model SOFCAL response to incident gamma rays and to compute the measure of energy deposition ΣE_γ in different layers of the calorimeter within the emulsion chamber. The partial coefficient of inelasticity k_γ, defined by ΣE_γ = k_γ E_0, was computed for different energies E_0 of primary cosmic rays. The k_γ-distributions were computed and compared with existing calorimeter data. Funding was provided by the NASA/University Joint Venture (JOVE) Program.
机译：美国国家航空航天局/马歇尔太空飞行中心正在开发一种闪烁式光纤量热仪（SOFCAL），用于气球飞行实验，以研究高能宇宙射线和伽马射线的光谱。 SOFCAL不会在长时间曝光时饱和，并且量热计将在乳化室中用于研究能量为100 GeV至1,000 TeV的主要宇宙射线核。事件生成器FRITIOF用于在乳胶室内模拟宇宙射线弹与目标核的碰撞。乳剂相互作用中带电粒子的测量与主要宇宙射线核-核相互作用的能量有关，电磁级联的计算机模拟可以计算沉积在量热仪不同区域的能量ΣE_γ。蒙特卡罗程序GEANT用于模拟SOFCAL对入射伽马射线的响应，并计算在乳化室内的量热计的不同层中能量沉积ΣE_γ的度量。对于原始宇宙射线的不同能量E_0，计算了由ΣE_γ=k_γE_0定义的非弹性局部系数k_γ。计算k_γ分布，并将其与现有量热仪数据进行比较。资金由NASA /大学合资企业（JOVE）计划提供。

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