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Laboratori Nazionali del Gran Sasso (LNGS) is a particle physics laboratory of the INFN, situated near the Gran Sasso mountain in Italy, between the towns of L'Aquila and Teramo, about 120 km from Rome. In addition to a surface portion of the laboratory, there are extensive underground facilities beneath the mountain. The mission of the laboratory is to host experiments that require a low background environment in the field of astroparticle physics and nuclear astrophysics and other disciplines that can profit of its characteristics and of its infrastructures. The LNGS is, like the three other European underground astroparticle laboratories, Laboratoire Souterrain de Modane, Laboratorio subterráneo de Canfranc, and Boulby Underground Laboratory, a member of the coordinating group ILIAS. ==Facilities== The laboratory consists of a surface facility, located within the Gran Sasso and Monti della Laga National Park, and extensive underground facilities located next to the 10 km long Traforo del Gran Sasso freeway tunnel. The first large experiments at LNGS ran in 1989; the facilities were later expanded, and it is now the largest underground laboratory in the world.〔 There are three main barrel vaulted experimental halls, each approximately 20 m wide, 18 m tall, and 100 m long.〔 These provide roughly 3×20×100= of floor space and 3×20×(8+10×''π''/4)×100= of volume. Including smaller spaces and various connecting tunnels, the facility totals and . The experimental halls are covered by about 1400 m of rock, protecting the experiments from cosmic rays. Providing about 3400 metres of water equivalent (mwe) shielding, it is not the deepest underground laboratory, but the fact that it can be driven to without using mine elevators makes it very popular. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Laboratori Nazionali del Gran Sasso」の詳細全文を読む スポンサード リンク
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