The SND@LHC neutron shielding
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초록

This paper presents the design, construction, and simulation-based validation of the ColdBox, a combined neutron shielding and insulating enclosure for the Scattering and Neutrino Detector at the LHC (SND@LHC). The emulsion films in the detector's target region require protection from the intense neutron radiation background and a stable environment of 15 +/- 1 degrees C and 50-55% relative humidity for long-term stability. The ColdBox meets these requirements through a dual-layer structure: an external 5 cm plexiglass wall to moderate fast neutrons, and an internal 4 cm layer of borated polyethylene (with 35% boron content) to capture thermal neutrons. The mechanical design, based on a robust aluminum frame, accommodates the constraints of the TI18 tunnel. FLUKA simulations were used to optimize the shielding configuration, showing a significant reduction in the neutron flux, with a simulated ratio of shielded to unshielded thermal neutron fluence of 2.3 x 10(-3). This result is consistent with initial measurements from BatMon detectors. The design also provides a sealed volume for a cooling system to maintain the required temperature and humidity, ensuring the necessary conditions for the emulsion films' integrity.

키워드

Overall mechanics design (support structures and materials, vibration analysis etc)Detector cooling and thermo-stabilizationAccelerator ApplicationsNeutrino detectors
제목
The SND@LHC neutron shielding
저자
Zamora-Saa, J. A.Abbaneo, D.Ahmad, S.Albanese, R.Alexandrov, A.Alicante, F.Aloschi, F.Androsov, K.Asawatangtrakuldee, C.Ayala Torres, M. A.Bangaru, N.Bastias Gorlich, M.Battilana, C.Bay, A.Bertocco, A.Betancourt, C.Bick, D.Biswas, R.Blanco Castro, A.Boccia, V.Bogomilov, M.Bonacorsi, D.Bonivento, W. M.Bordalo, P.Boyarsky, A.Breglio, G.Buontempo, S.Cafaro, V.Campanelli, M.Camporesi, T.Canale, V.Centanni, D.Cepeda, S.Cerutti, F.Chariton, V.Choi, K. -Y.Cindolo, F.Climescu, M.Crupano, A.Dallavalle, G. M.D'Ambrosio, N.Davino, D.De Bryas, P. T.De Asmundis, R.De Lellis, G.Del Giudice, G.De Magistris, M.De Roeck, A.De Pasquale, S.De Rujula, A.De Simone, D.De Souza Santos, H.Gutierrez, M. A. DiazDi Crescenzo, A.Di Cristo, C.Di Ferdinando, D.Dinc, C.Dona, R.Durhan, O.Fasanella, D.Fecarotta, O.Fedotovs, F.Ferrillo, M.Fienga, F.Fiorillo, A.Fresa, R.Funk, W.Giordano, V.Golutvin, A.Graverini, E.Guiducci, L.Guler, A. M.Guliaeva, V.Haefeli, G. J.Hagner, C.Helo Herrera, J. C.van Herwijnen, E.Iaiunese, A.Ilieva, S.Cabanas, S. A. InfanteInfantino, A.Irace, A.Iuliano, A.Jacobsson, R.Kamiscioglu, C.Kauniskangas, A. M.Kim, S. H.Kim, Y. G.Klioutchnikov, G.Komatsu, M.Kuleshov, S.Lacker, H. M.Lantwin, O.Manghi, F. LasagniLauria, A.Lee, K. Y.Lee, K. S.Lee, W. -C.Liz-Vargas, M.Loschiavo, V. P.Mascellani, A.Majstorovic, M.Marrazzo, V.Mei, F.Miano, A.Mikulenko, A.Montesi, M. C.Morozova, D.Navarria, F. L.Nuntiyakul, W.Ogawa, S.Ovchynnikov, M.Paggi, G.Perrotta, A.Pinto, R.Polukhina, N.Primavera, F.Prota, A.Quercia, A.Ramos, S.Reghunath, A.Ronchetti, F.Rovelli, T.Ruchayskiy, O.Ruf, T.Sadykov, Z.Scalera, V.Schmidt-Parzefall, W.Schneider, O.Sekhniaidze, G.Serra, N.Shaposhnikov, M.Shchedrina, T.Shchutska, L.Shibuya, H.Sirri, G.Soares, G.Sohn, J. Y.Soto Sandoval, O. J.Spurio, M.Steggemann, J.Strekalina, D.Timiryasov, I.Tioukov, V.Trippl, C.Ursov, E.Ustyuzhanin, A.Vankova-Kirilova, G.Vasquez, G.Verguilov, V.Viegas Guerreiro Leonardo, N.Vilela, C.Visone, C.Wanke, R.Yamamoto, S.Yaman, E.Yang, Z.Yazici, C.Yoo, S.Yoon, C. S.Zaffaroni, E.
DOI
10.1088/1748-0221/20/12/T12002
발행일
2025-12
유형
Article
저널명
Journal of Instrumentation
20
12