GINGERino is a large frame laser gyroscope investigating the ground motion in the most inner part of the underground international laboratory of the Gran Sasso, in central Italy. It consists of a square ring laser with a $3.6$ m side. Several days of continuous measurements have been collected, with the apparatus running unattended. The power spectral density in the seismic bandwidth is at the level of $10^{-10} \rm{(rad/s)/\sqrt{Hz}}$. A maximum resolution of $30\,\rm{prad/s}$ is obtained with an integration time of few hundred seconds. The ring laser routinely detects seismic rotations induced by both regional earthquakes and teleseisms. A broadband seismic station is installed on the same structure of the gyroscope. First analysis of the correlation between the rotational and the translational signal are presented.
An LNGS Mobile Neutron Detector (ALMOND): Mapping Ambient Neutron Background of Gran Sasso National Laboratory
Heidelberg University(海德堡大学);Karlsruhe Institute of Technology(卡尔斯鲁厄理工学院);University of L’Aquila(拉奎拉大学);INFN, Laboratori Nazionali del Gran Sasso(意大利国家核物理研究所,格兰萨索国家实验室)
Operation and performance of the ICARUS-T600 cryogenic plant at Gran Sasso underground Laboratory
ICARUS T600液氩时间投影室是新一代的第一个大质量电子探测器,它能够将旧泡室的成像能力与出色的量热能量测量相结合。2001年在帕维亚进行了三个月的地面示范运行后,T600低温工厂在可靠性和安全性方面进行了重大修改,考虑到其在地下环境中的长期运行。T600探测器于2010年春季在INFN Gran Sasso实验室的B厅启动,在那里不间断地运行了大约三年,将暴露于欧洲核子研究中心的数据带到Gran Sasso长基线中微子束和宇宙射线。本文详细介绍了T600低温装置以及在液态氩填充结束后不久成功运行探测器的调试程序。讨论了长期地下运行期间的总体电厂性能和稳定性。最后,退役程序,进行了约6个月后,CNGS中微子束操作结束,报告。