1. $^{22}$Na Activation Level Measurements of Fused Silica Rods in the LHC Target Absorber for Neutrals (TAN) Compared to FLUKA Simulations
- Author
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Yang, S., Gilarte, M. Sabate, Tate, A., Santiago, N., Longo, R., Mazzoni, S., Cerutti, F., Bravin, E., Perdekamp, M. Grosse, Lerner, G., Prelipcean, D., Citron, Z., Cole, B., Jackobsen, S., Kaminski, M. D., Koeth, T., Lantz, C., MacLean, D., Mignerey, A., Murray, M., Palm, M., Phipps, M., Steinberg, P., and Tsinganis, A.
- Subjects
Physics - Accelerator Physics ,Physics - Instrumentation and Detectors - Abstract
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, $\rho= 2.5\times 10^{12} /{\rm cm^3}$, 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., Comment: 11 pages, 14 figures, to be submitted to PRAB
- Published
- 2022
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