1999 Site Environmental Report

Engel-Cox, Jill; Zimmerman, Earl G.; Lee, R.; Williams, Jorge Daniel; Green, T.; Paquette, Douglas E.; Hooda, B.; Scarpitta, S.; Genzer, P.

doi:10.2172/910920

Cited by 3 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We adopt a 25% systematic uncertainty due to MC simulations of the EAS and the detector, dominated by differences between hadronic models (QGSJET [34] and SIBYLL [35]). …”

mentioning

confidence: 99%

Upper Limit on the Diffuse Flux of Ultrahigh Energy Tau Neutrinos from the Pierre Auger Observatory

Abraham¹,

Abreu²,

Aglietta³

et al. 2008

Phys. Rev. Lett.

244

226

View full text Add to dashboard Cite

20 pages, 3 figures Submitted to Phys.Rev.Lett.International audienceThe surface detector array of the Pierre Auger Observatory is sensitive to Earth-skimming tau neutrinos that interact in Earth's crust. Tau leptons from ντ charged-current interactions can emerge and decay in the atmosphere to produce a nearly horizontal shower with a significant electromagnetic component. The data collected between 1 January 2004 and 31 August 2007 are used to place an upper limit on the diffuse flux of ντ at EeV energies. Assuming an Eν-2 differential energy spectrum the limit set at 90% C.L. is Eν2dNντ/dEν<1.3×10-7GeVcm-2s-1sr-1 in the energy range 2×1017e

show abstract

“…We adopt a 25% systematic uncertainty due to MC simulations of the EAS and the detector, dominated by differences between hadronic models (QGSJET [34] and SIBYLL [35]). …”

mentioning

confidence: 99%

Upper Limit on the Diffuse Flux of Ultrahigh Energy Tau Neutrinos from the Pierre Auger Observatory

Abraham¹,

Abreu²,

Aglietta³

et al. 2008

Phys. Rev. Lett.

244

226

View full text Add to dashboard Cite

show abstract

“…To investigate the deconvolution technique, we simulated sets of proton-induced showers of 10 EeV using CONEX [9] with the high energy interaction models QGSJET01 [10], SIBYLL2.1 [11], NEXUS3 [12], and QGSJETII.3 [13]. In addition helium, CNO and gamma-ray primaries were simulated with QGSJET01.…”

Section: Simulation Studymentioning

confidence: 99%

On the measurement of the proton-air cross section using longitudinal shower profiles

Ulrich¹,

Blümer²,

Engel³

et al. 2008

Nuclear Physics B - Proceedings Supplements

View full text Add to dashboard Cite

In this paper, we will discuss the prospects of deducing the proton-air cross section from fluorescence telescope measurements of extensive air showers. As it is not possible to observe the point of first interaction X1 directly, other observables closely linked to X1 must be inferred from the longitudinal profiles. This introduces a dependence on the models used to describe the shower development. The most straightforward candidate for a good correlation to X1 is the depth of shower maximum Xmax. We will discuss the sensitivity of an Xmax-based analysis on σp−air and quantify the systematic uncertainties arising from the model dependence, parameters of the reconstruction method itself and a possible non-proton contamination of the selected shower sample.

show abstract

“…The spectrometer has been rebuilt during the construction of the new COSY synchrotron and was made fit to take advantage of the external COSY beams [13,14]. The schematic view of the reconstructed Big Karl spectrometer, together with the detectors in the focal plane and at the first dipole D1 exit, is shown in Fig.…”

Section: Upgrade Of the Big Karl Spectrometermentioning

confidence: 99%

“…In order to improve the background conditions, a small dipole magnet was mounted in the beam line in front of the target and was used to bend the beam in the horizontal direction [18]. With this additional dipole magnet the incidence angle of the COSY beam on the target could be changed by 723 mrad (at the beam momentum of 1590 MeV=c) and it was possible to control the position where the primary beam hit the side yoke of the first dipole.…”

Section: Background Suppression and Trigger Rate Reductionmentioning

confidence: 99%