Study of the Low-Energy Background Variations in the LVD Underground Experiment

Agafonova, N.; Ashikhmin, V. V.; Dobrynina, E. A.; Enikeev, R. I.; Malgin, A. S.; Rudakov, K. R.; Ryazhskaya, O. G.; Shakiryanova, I. R.; Yakushev, V. F.

doi:10.3103/s1062873819050046

Cited by 17 publications

(5 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Remarkably, the radon and water vapour signals coincide by sign and by magnitude (∼1%-3%) over two months of measurements. The same dependence was previously observed at the Gran Sasso observatory (Italy) [18]. Supposing that radon gas is produced by volcanic fluids originating from the Elbrus volcano magmatic feeding system, a small decrease of air temperature in the adit should appear.…”

Section: Resultssupporting

confidence: 82%

“…Radioactive radon gas emanates through cracks in the rock [17,18]. The radon accumulation in closed chambers such as an underground geophysical laboratory can affect highly sensitive LIDAR measurements due to the light emission induced by the radon spontaneous radioactivity, so we also measured the radon concentration every hour by a commercially available radon sensor (RADEX MR107).…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Volcanic activity monitoring by unique LIDAR based on a diode laser

Першин¹,

Собисевич²,

Grishin³

et al. 2020

Laser Phys. Lett.

View full text Add to dashboard Cite

For the first time, we monitored the Elbrus volcano activity detecting volcanic gases emanating through pores using an unique eye-safe LIDAR system. A highly sensitive eye-safe LIDAR system was developed for monitoring the fracture-emitted aerosol, which is transported by volcanic gases inside a hot tunnel near the Elbrus Mountain. The developed LIDAR is based on a diode laser (transmitter, 910 nm, 3 ns, <1 µJ cm−2) and a single-photon avalanche photodiode (detector). From August to October 2019, within the first months of the LIDAR monitoring, we have detected a two-fold decrease in the fracture-emitted aerosol emanation, while other parameters in the tunnel remained relatively stable (radon concentration, air temperature and humidity changed less than by 1%). A significant correlation between the LIDAR signal of volcanic aerosol and the Earth’s crust deformation measured by the laser strainmeter located nearby was found. Based on our preliminary experiments we consider the new LIDAR system as a sensitive, economical and robust instrument for Earth’s crust deformation and volcanic activity monitoring and eruption precursor observation.

show abstract

Section: Resultssupporting

confidence: 82%

Section: Methodsmentioning

confidence: 99%

Volcanic activity monitoring by unique LIDAR based on a diode laser

Першин¹,

Собисевич²,

Grishin³

et al. 2020

Laser Phys. Lett.

View full text Add to dashboard Cite

show abstract

“…For example, the Large Volume Detector (LVD) experiment located in the Hall A of LNGS (3600 m.w.e.) observed there that the temperature and humidity were rather featureless, while the radon concentration had a seasonal variation of 4% with a maximum at the beginning of September, when the ambient rock is most strongly permeated with underground water [34]. No neutron detectors were used in Ref.…”

Section: Long-term Evolution Of the Environmental Datamentioning

confidence: 99%

“…No neutron detectors were used in Ref. [34], hence there is no information available on the neutron rate. We found the pressure quite stable at LSC and not correlated to the seasonal radon variation.…”

Section: Long-term Evolution Of the Environmental Datamentioning

confidence: 99%

“…Again, this feature can be different in other UG laboratories or when the conditions change on smaller time scales. For example, the forced ventilation system of LNGS produced daily variations in the radon concentration due to the excess of air pressure generated when closing the hall gates at night, reducing the radon emanation from the ambient rock [34]. In absence of forced ventilation, sporadic increases in the thermal neutron rate were observed UG at Moscow State University (25 m.w.e.)…”

Section: Long-term Evolution Of the Environmental Datamentioning

confidence: 99%

See 1 more Smart Citation

Long-term evolution of the neutron rate at the Canfranc Underground Laboratory

Orrigo

Taı́n

Mont-Geli³

et al. 2022

Eur. Phys. J. C

View full text Add to dashboard Cite

We report results on the long-term variation of the neutron counting rate at the Canfranc Underground Laboratory, of importance for several low-background experiments installed there, including rare-event searches. The measurement campaign was performed employing the High Efficiency Neutron Spectrometry Array (HENSA) mounted in Hall A and lasted 412 live days. The present study is the first long-term measurement of the neutron rate with sensitivity over a wide range of neutron energies (from thermal up to 0.1 GeV and beyond) performed in any underground laboratory so far. Data on the environmental variables inside the experimental hall (radon concentration, air temperature, air pressure and humidity) were also acquired during all the measurement campaign. We have investigated for the first time the evolution of the neutron rate for different energies of the neutrons and its correlation with the ambient variables.

show abstract