muon momentum
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2021 ◽  
Author(s):  
Junghyun Bae ◽  
Stylianos Chatzidakis

Abstract Cosmic ray muons have been considered as a non-conventional radiation probe in various applications. To utilize cosmic ray muons in engineering applications, two important quantities, trajectory and momentum, must be known. The muon trajectories are easily reconstructed using two-fold detector arrays with a high spatial resolution. However, precise measurement of muon momentum is difficult to be achieved without deploying large and expensive spectrometers such as solenoid magnets. Here, we propose a new method to estimate muon momentum using multi-layer pressurized gas Cherenkov radiators. This is accurate, portable, compact (< 1m3), and easily coupled with existing muon detectors without the need of bulky magnetic or time-of-flight spectrometers. The results show that not only our new muon spectrometer can measure muon momentum with a resolution of ±0.5 GeV/c in a momentum range of 0.1 to 10.0 GeV/c, but also we can reconstruct cosmic muon spectrum with high accuracy (~90%).


Author(s):  
Manfred Daum ◽  
Peter-R. Kettle

The most precise value for the pion mass was determined from a precision measurement at PSI of the muon momentum in pion decay at rest, \pi^+ \rightarrow \mu^+ + \nu_{\mu}π+→μ++νμ. The result is m_{\pi^+} = 139.570\,21(14)mπ+=139.57021(14)~MeV/c^22. This value is more precise, however, in agreement with the recent compilation of the Particle Data Group for m_{\pi^-}mπ−. The agreement of m_{\pi^+}mπ+ with the recent measurement. This yields a new quantitative measure of CPT invariance in the pion sector: (m_{\pi^+} - m_{\pi^-})/m_{\pi}(\mbox{av}) = (-2.9 \pm 2.0)\cdot 10^{-6}(mπ+−mπ−)/mπ(av)=(−2.9±2.0)⋅10−6, an improvement by two orders of magnitude.


Author(s):  
A. D. Bhatt ◽  
Gobinda Majumder ◽  
V. M. Datar ◽  
B. Satyanarayana

Author(s):  
S. Vanini ◽  
P. Calvini ◽  
P. Checchia ◽  
A. Rigoni Garola ◽  
J. Klinger ◽  
...  

In recent decades, muon imaging has found a plethora of applications in many fields. This technique succeeds to infer the density distribution of big inaccessible structures where conventional techniques cannot be used. The requirements of different applications demand specific implementations of image reconstruction algorithms for either multiple scattering or absorption–transmission data analysis, as well as noise-suppression filters and muon momentum estimators. This paper presents successful results of image reconstruction techniques applied to simulated data of some representative applications. In addition to well-known reconstruction methods, a novel approach, the so-called μCT, is proposed for the inspection of spent nuclear fuel canisters. Results obtained based on both μCT and the maximum-likelihood expectation maximization reconstruction algorithms are presented. This article is part of the Theo Murphy meeting issue ‘Cosmic-ray muography’.


2017 ◽  
Vol 12 (10) ◽  
pp. P10010-P10010 ◽  
Author(s):  
P. Abratenko ◽  
R. Acciarri ◽  
C. Adams ◽  
R. An ◽  
J. Anthony ◽  
...  

2017 ◽  
Vol 12 (04) ◽  
pp. P04010-P04010 ◽  
Author(s):  
M. Antonello ◽  
B. Baibussinov ◽  
V. Bellini ◽  
P. Benetti ◽  
F. Boffelli ◽  
...  

2013 ◽  
Vol 28 (16) ◽  
pp. 1350071 ◽  
Author(s):  
HALIL ARSLAN ◽  
MEHMET BEKTASOGLU

The zenith angle dependence of cosmic muon flux at sea level in the western, eastern, southern and northern azimuths have been investigated separately for Calcutta, India and Melbourne, Australia for muon momenta up to ~500 GeV /c using Geant4 simulation package. These two locations were selected due to the fact that they significantly differ in geomagnetic cutoff rigidity. The exponent n, which is defined by the relation I(θ) = I(0°) cos nθ, was obtained for each azimuth in Calcutta and Melbourne. By acquiring an agreement between the simulation results and the experimental ones, the simulation study was extended for different azimuth angles and higher muon momenta. It was shown that the angular dependence of the cosmic muon intensity decreases with the increase of muon momentum at both locations. Moreover, the exponent becomes independent of both geomagnetic location and the azimuth angle for muons with momentum above 10 GeV /c, and it is nearly zero above 50 GeV /c. Therefore, it can be concluded that the cosmic muons with momenta between 50 GeV /c and ~500 GeV /c reach the sea level almost isotropically.


2012 ◽  
Vol 1 (2) ◽  
pp. 185-196 ◽  
Author(s):  
S. Cecchini ◽  
M. Spurio

Abstract. We present a review of atmospheric muon flux and energy spectrum measurements over almost six decades of muon momentum. Sea level and underground/water/ice experiments are considered. Possible sources of systematic errors in the measurements are examined. The characteristics of underground/water muons (muons in bundle, lateral distribution, energy spectrum) are discussed. The connection between the atmospheric muon and neutrino measurements are also reported.


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