Measurements on the cosmic radiation intensity in the mont blanc tunnel

Castagnoli, C.; Marco, A. De; Longhetto, A.; Penengo, P.

doi:10.1007/bf02735517

Cited by 27 publications

(15 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This value is slightly below the previous value of n = 2 from a tunnel under the Mont Blanc at 140 m.w.e. depth [43]. At the Earth's surface, here n = 2.12 ±0.07 is found, consistent with previous work [44].…”

Section: Determination Of the Zenith Angle Distributionsupporting

confidence: 92%

“…The angle-integrated intensities of the different methods show excellent agreement with the measurement, as well: The range-energy calculation gives J RE = 5.0 m −2 s −1 , the simulation J MC = 4.9 m −2 s −1 , and the experiment J exp = 4.9(4) m −2 s −1 . It can be concluded the rock overburden [43,[52][53][54] are taken from tables in Ref. [1].…”

Section: Comparison Of the Data With The Predictionsmentioning

confidence: 99%

See 1 more Smart Citation

The muon intensity in the Felsenkeller shallow underground laboratory

Ludwig

Wagner

Al-Abdullah

et al. 2019

Astroparticle Physics

View full text Add to dashboard Cite

The muon intensity and angular distribution in the shallow-underground laboratory Felsenkeller in Dresden, Germany have been studied using a portable muon detector based on the close cathode chamber design. Data has been taken at four positions in Felsenkeller tunnels VIII and IX, where a new 5 MV underground ion accelerator is being installed, and in addition at four positions in Felsenkeller tunnel IV, which hosts a low-radioactivity counting facility. At each of the eight positions studied, seven different orientations of the detector were used to compile a map of the upper hemisphere with 0.85 • angular resolution. The muon intensity is found to be suppressed by a factor of 40 due to the 45 m thick rock overburden, corresponding to 140 meters water equivalent. The angular data are matched by two different simulations taking into account the known geodetic features of the terrain: First, simply by determining the cutoff energy using the projected slant depth in rock and the known muon energy spectrum, and second, in a Geant4 simulation propagating the muons through a column of rock equal to the known slant depth. The present data are instrumental for studying muon-induced effects at these depths and also in the planning of an active veto for accelerator-based underground nuclear astrophysics experiments. [34,35] that such a veto may reduce the observed background in γ-detectors typical for in-beam nuclear astrophysics experiments to a level that is close to the background in the same detectors deep underground, underlining the importance of a proper muon veto.This work is organized as follows. The underground site is described in sec. 2. Section 3 introduces the experimental setup, including the REGARD muon telescope used here, and experimental procedures. The data analysis and results are presented in sec. 4. The data are then matched, first, by a calculation based on the known rangeenergy relation, and second, by a Monte Carlo simulation using the Geant4 framework (sec. 5). A discussion is offered in sec. 6. The conclusions, a summary and an outlook are given in sec. 7. Description of the underground site studiedThe shallow-underground site Felsenkeller is located in the Plauenscher Grund district, inside the city of Dresden, Germany. The site extends along the Weißeritz river, a tributary of the Elbe, and was used as a quarry until the 18th century, then converted to a brewery, which in turn closed in 1991. The terrain is characterized by a steep cliff that runs from Northeast to Southwest, an approximately flat high plain at 200 m a.s.l. and a river floodplain at 140 m a.s.l. (Fig. 1).Nine horizontal storage tunnels were dug into the rock from 1856 to 1859. All nine tunnels have horizontal access and are interconnected in a comb-like structure (Fig. 2). The site is protected from cosmic rays by an overburden of 45 m of hornblende monzonite rock, part of the "Meißner Massiv" formation. The density of rock samples taken from the tunnels VIII and IX was here found to be (2.69±0.06) g/cm 3 . The hornblende mon...

show abstract

Section: Determination Of the Zenith Angle Distributionsupporting

confidence: 92%

Section: Comparison Of the Data With The Predictionsmentioning

confidence: 99%

The muon intensity in the Felsenkeller shallow underground laboratory

Ludwig

Wagner

Al-Abdullah

et al. 2019

Astroparticle Physics

View full text Add to dashboard Cite

show abstract

“…Cosmic-ray muon flux as a function of depth has been studied by many experiments at underground facilities around the world. Measurements of the muon flux per unit solid angle as a function of slant depth from Castagnoli [5], Barrett [6], Miyake [7], WIPP [8], Soudan [9], Kamioka [10], Boulby [11], Gran Sasso [12,13], Fréjus [14] and Sudbury [15] have been used to develop a model, which can be used to predict the muon flux per unit solid angle as a function of depth [4].…”

mentioning

confidence: 99%

Cosmic ray muon flux at the Sanford Underground Laboratory at Homestake

Gray

Ruybal

Totushek

et al. 2011

Nuclear Instruments and Methods in Physics Research Section A:

View full text Add to dashboard Cite

show abstract

“…Muon intensity vs standard rock thickness. The data are from Refs [21][22][23][24][25][28][29][30][31]50]…”

mentioning

confidence: 99%

Atmospheric muon flux at sea level, underground, and underwater

et al. 1998

View full text Add to dashboard Cite

The vertical sea-level muon spectrum at energies above 1 GeV and the muon intensities at depths up to 18 km w.e. in different rocks and in water are calculated. The results are particularly collated with a great body of the ground-level, underground, and underwater muon data. In the hadron-cascade calculations, we take into account the logarithmic growth with energy of inelastic cross sections and pion, kaon, and nucleon generation in pion-nucleus collisions. For evaluating the prompt muon contribution to the muon flux, we apply the two phenomenological approaches to the charm production problem: the recombination quark-parton model and the quark-gluon string model. We give simple fitting formulas describing our numerical results. To solve the muon transport equation at large depths of a homogeneous medium, we use a semianalytical method, which allows the inclusion of an arbitrary (decreasing) muon spectrum at the medium boundary and real energy dependence of muon energy losses. Our analysis shows that at the depths up to 6-7 km w.e., essentially all underground data on the muon flux correlate with each other and with the predicted one for conventional (π, K)-muons, to within 10 %. However, the high-energy sea-level muon data as well as the data at high depths are contradictory and cannot be quantitatively described by a single nuclear-cascade model.

show abstract

Measurements on the cosmic radiation intensity in the mont blanc tunnel

Cited by 27 publications

References 7 publications

The muon intensity in the Felsenkeller shallow underground laboratory

The muon intensity in the Felsenkeller shallow underground laboratory

Cosmic ray muon flux at the Sanford Underground Laboratory at Homestake

Atmospheric muon flux at sea level, underground, and underwater

Contact Info

Product

Resources

About