论文标题
与Fluka模拟相比
$^{22}$Na Activation Level Measurements of Fused Silica Rods in the LHC Target Absorber for Neutrals (TAN) Compared to FLUKA Simulations
论文作者
论文摘要
中性物质（TAN）的靶吸收器位于大型强子对撞机（LHC）隧道内的高强度辐射环境中。棕褐色的位置约为$ 140 $ m，与光束相互作用点下游。在$+$+$ p $ p $ p $ p $数据中，从2016年到2018年在LHC上，中性探测器组（BRAN）探测器组在棕褐色的棕褐色速度（BRAN）探测器组中辐射了七个$ 40 $ cm长的熔融二氧化硅杆。将峰值剂量输送到融合的二氧化硅棒为$ 18 $ MGY。我们报告了$^{22} $ na激活在伊利诺伊大学Urbana-Champaign和Argonne国家实验室进行的融合二氧化硅杆的尺寸。在辐照活动结束时，观察到的最大$^{22} $ na活动为$ a = 21 $ kbq $ /{\ rm cm^3} $对应于密度，$ρ= 2.5 \ times 10^{12} {12} /{\ rm cm^3} $，$^3} $，$^22} $ na nuclei。 Cern Fluka团队已经进行了Fluka Monte Carlo模拟，以估计$^{22} $ na活动，用于辐射的Bran Rod样品。这些模拟重现了沿杆子测量的$^{22} $ NA活动曲线，而实验测量结果低估了35％。
The Target Absorbers for Neutrals (TANs) are located in a high-intensity radiation environment inside the tunnel of the Large Hadron Collider (LHC). TANs are positioned about $140$ m downstream from the beam interaction points. Seven $40$ cm long fused silica rods with different dopant specifications were irradiated in the TAN by the Beam RAte of Neutrals (BRAN) detector group during $p$+$p$ data taking from 2016 to 2018 at the LHC. The peak dose delivered to the fused silica rods was $18$ MGy. We report measurements of the $^{22}$Na activation of the fused silica rods carried out at the University of Illinois at Urbana-Champaign and Argonne National Laboratory. At the end of the irradiation campaign, the maximum $^{22}$Na activity observed was $A=21$ kBq$/{\rm cm^3}$ corresponding to a density, $ρ= 2.5\times 10^{12} /{\rm cm^3}$, of $^{22}$Na nuclei. FLUKA Monte Carlo simulations have been performed by the CERN FLUKA team to estimate $^{22}$Na activities for the irradiated BRAN rod samples. The simulations reproduce the $^{22}$Na activity profile measured along the rods, with a 35% underestimation of the experimental measurement results.
