Timing calibration and synchronization of surface and fluorescence detectors of the Pierre Auger Observatory

P. Allison, J. Bellido, X. Bertou, C. E. Covault, M. DuVernois, B. E. Fick, H. Gemmeke, M. Kleifges, A. Letessier-Selvon, M. Mostafa, A. Menshikov, F. Meyer, C. Pryke, M. Roberts, P. Sommers, E. Vanderpan, F. Vernotte, L. Wiencke

Research output: Contribution to conferencePaper

4 Citations (Scopus)

Abstract

Reconstruction of cosmic ray arrival directions for Surface Detectors (SD) and Fluorescence Detectors (FD) of the Pierre Auger Observatory requires accurate timing (25 nanoseconds or better) between measurements at individual detectors and instrument triggers. Timing systems for both SD and FD are based on Motorola Oncore UT+ GPS receivers installed into custom-built time-tagging circuits that are calibrated in the laboratory to a statistical precision of better than 15 ns. We describe timing calibration and synchronization methods applied in the field for both the SD and the FD systems in four areas: (1) checks of timing offsets within the SD using co-located station pairs and timing residuals on reconstructed showers, (2) calibration within the FD using a custom-build LED calibration system, (3) calibration between SD and FD using laser signals fed simultaneously into an SD station and across the FD via the Central Laser Facility (CLF), and (4) studies of synchronization between FD and SD through the analysis of events detected by both systems, called hybrid events. These hybrid events allow for a much more accurate reconstruction of the shower and for relatively tight constraints on timing calibration offsets. We demonstrate that statistical and systematic timing uncertainties have no significant impact on the event reconstruction.

Original languageEnglish (US)
Pages307-310
Number of pages4
StatePublished - Jan 1 2005
Event29th International Cosmic Ray Conference, ICRC 2005 - Pune, India
Duration: Aug 3 2005Aug 10 2005

Other

Other29th International Cosmic Ray Conference, ICRC 2005
CountryIndia
CityPune
Period8/3/058/10/05

Fingerprint

synchronism
observatories
time measurement
fluorescence
detectors
showers
stations
marking
lasers
arrivals
cosmic rays
light emitting diodes
receivers
actuators

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Allison, P., Bellido, J., Bertou, X., Covault, C. E., DuVernois, M., Fick, B. E., ... Wiencke, L. (2005). Timing calibration and synchronization of surface and fluorescence detectors of the Pierre Auger Observatory. 307-310. Paper presented at 29th International Cosmic Ray Conference, ICRC 2005, Pune, India.
Allison, P. ; Bellido, J. ; Bertou, X. ; Covault, C. E. ; DuVernois, M. ; Fick, B. E. ; Gemmeke, H. ; Kleifges, M. ; Letessier-Selvon, A. ; Mostafa, M. ; Menshikov, A. ; Meyer, F. ; Pryke, C. ; Roberts, M. ; Sommers, P. ; Vanderpan, E. ; Vernotte, F. ; Wiencke, L. / Timing calibration and synchronization of surface and fluorescence detectors of the Pierre Auger Observatory. Paper presented at 29th International Cosmic Ray Conference, ICRC 2005, Pune, India.4 p.
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title = "Timing calibration and synchronization of surface and fluorescence detectors of the Pierre Auger Observatory",
abstract = "Reconstruction of cosmic ray arrival directions for Surface Detectors (SD) and Fluorescence Detectors (FD) of the Pierre Auger Observatory requires accurate timing (25 nanoseconds or better) between measurements at individual detectors and instrument triggers. Timing systems for both SD and FD are based on Motorola Oncore UT+ GPS receivers installed into custom-built time-tagging circuits that are calibrated in the laboratory to a statistical precision of better than 15 ns. We describe timing calibration and synchronization methods applied in the field for both the SD and the FD systems in four areas: (1) checks of timing offsets within the SD using co-located station pairs and timing residuals on reconstructed showers, (2) calibration within the FD using a custom-build LED calibration system, (3) calibration between SD and FD using laser signals fed simultaneously into an SD station and across the FD via the Central Laser Facility (CLF), and (4) studies of synchronization between FD and SD through the analysis of events detected by both systems, called hybrid events. These hybrid events allow for a much more accurate reconstruction of the shower and for relatively tight constraints on timing calibration offsets. We demonstrate that statistical and systematic timing uncertainties have no significant impact on the event reconstruction.",
author = "P. Allison and J. Bellido and X. Bertou and Covault, {C. E.} and M. DuVernois and Fick, {B. E.} and H. Gemmeke and M. Kleifges and A. Letessier-Selvon and M. Mostafa and A. Menshikov and F. Meyer and C. Pryke and M. Roberts and P. Sommers and E. Vanderpan and F. Vernotte and L. Wiencke",
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Allison, P, Bellido, J, Bertou, X, Covault, CE, DuVernois, M, Fick, BE, Gemmeke, H, Kleifges, M, Letessier-Selvon, A, Mostafa, M, Menshikov, A, Meyer, F, Pryke, C, Roberts, M, Sommers, P, Vanderpan, E, Vernotte, F & Wiencke, L 2005, 'Timing calibration and synchronization of surface and fluorescence detectors of the Pierre Auger Observatory', Paper presented at 29th International Cosmic Ray Conference, ICRC 2005, Pune, India, 8/3/05 - 8/10/05 pp. 307-310.

Timing calibration and synchronization of surface and fluorescence detectors of the Pierre Auger Observatory. / Allison, P.; Bellido, J.; Bertou, X.; Covault, C. E.; DuVernois, M.; Fick, B. E.; Gemmeke, H.; Kleifges, M.; Letessier-Selvon, A.; Mostafa, M.; Menshikov, A.; Meyer, F.; Pryke, C.; Roberts, M.; Sommers, P.; Vanderpan, E.; Vernotte, F.; Wiencke, L.

2005. 307-310 Paper presented at 29th International Cosmic Ray Conference, ICRC 2005, Pune, India.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Timing calibration and synchronization of surface and fluorescence detectors of the Pierre Auger Observatory

AU - Allison, P.

AU - Bellido, J.

AU - Bertou, X.

AU - Covault, C. E.

AU - DuVernois, M.

AU - Fick, B. E.

AU - Gemmeke, H.

AU - Kleifges, M.

AU - Letessier-Selvon, A.

AU - Mostafa, M.

AU - Menshikov, A.

AU - Meyer, F.

AU - Pryke, C.

AU - Roberts, M.

AU - Sommers, P.

AU - Vanderpan, E.

AU - Vernotte, F.

AU - Wiencke, L.

PY - 2005/1/1

Y1 - 2005/1/1

N2 - Reconstruction of cosmic ray arrival directions for Surface Detectors (SD) and Fluorescence Detectors (FD) of the Pierre Auger Observatory requires accurate timing (25 nanoseconds or better) between measurements at individual detectors and instrument triggers. Timing systems for both SD and FD are based on Motorola Oncore UT+ GPS receivers installed into custom-built time-tagging circuits that are calibrated in the laboratory to a statistical precision of better than 15 ns. We describe timing calibration and synchronization methods applied in the field for both the SD and the FD systems in four areas: (1) checks of timing offsets within the SD using co-located station pairs and timing residuals on reconstructed showers, (2) calibration within the FD using a custom-build LED calibration system, (3) calibration between SD and FD using laser signals fed simultaneously into an SD station and across the FD via the Central Laser Facility (CLF), and (4) studies of synchronization between FD and SD through the analysis of events detected by both systems, called hybrid events. These hybrid events allow for a much more accurate reconstruction of the shower and for relatively tight constraints on timing calibration offsets. We demonstrate that statistical and systematic timing uncertainties have no significant impact on the event reconstruction.

AB - Reconstruction of cosmic ray arrival directions for Surface Detectors (SD) and Fluorescence Detectors (FD) of the Pierre Auger Observatory requires accurate timing (25 nanoseconds or better) between measurements at individual detectors and instrument triggers. Timing systems for both SD and FD are based on Motorola Oncore UT+ GPS receivers installed into custom-built time-tagging circuits that are calibrated in the laboratory to a statistical precision of better than 15 ns. We describe timing calibration and synchronization methods applied in the field for both the SD and the FD systems in four areas: (1) checks of timing offsets within the SD using co-located station pairs and timing residuals on reconstructed showers, (2) calibration within the FD using a custom-build LED calibration system, (3) calibration between SD and FD using laser signals fed simultaneously into an SD station and across the FD via the Central Laser Facility (CLF), and (4) studies of synchronization between FD and SD through the analysis of events detected by both systems, called hybrid events. These hybrid events allow for a much more accurate reconstruction of the shower and for relatively tight constraints on timing calibration offsets. We demonstrate that statistical and systematic timing uncertainties have no significant impact on the event reconstruction.

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M3 - Paper

AN - SCOPUS:34248371813

SP - 307

EP - 310

ER -

Allison P, Bellido J, Bertou X, Covault CE, DuVernois M, Fick BE et al. Timing calibration and synchronization of surface and fluorescence detectors of the Pierre Auger Observatory. 2005. Paper presented at 29th International Cosmic Ray Conference, ICRC 2005, Pune, India.