Giles Barr: Publications

Observation in the MINOS far detector of the shadowing of cosmic rays by the sun and moon

Astroparticle Physics 34:6 (2011) 457-466

Authors:

P Adamson, C Andreopoulos, DS Ayres, C Backhouse, G Barr, WL Barrett, M Bishai, A Blake, B Bock, GJ Bock, DJ Boehnlein, D Bogert, C Bower, S Budd, S Cavanaugh, D Cherdack, S Childress, BC Choudhary, JH Cobb, JAB Coelho, SJ Coleman, L Corwin, D Cronin-Hennessy, IZ Danko, JK De Jong, NE Devenish, MV Diwan, M Dorman, CO Escobar, JJ Evans, E Falk, GJ Feldman, MV Frohne, HR Gallagher, A Godley, RA Gomes, MC Goodman, P Gouffon, R Gran, N Grant, EW Grashorn, K Grzelak, A Habig, D Harris, PG Harris, J Hartnell, R Hatcher, A Himmel, A Holin, X Huang, J Hylen, J Ilic, GM Irwin, Z Isvan, DE Jaffe, C James, D Jensen, T Kafka, SMS Kasahara, G Koizumi, S Kopp, M Kordosky, Z Krahn, A Kreymer, K Lang, G Lefeuvre, J Ling, PJ Litchfield, RP Litchfield, L Loiacono, P Lucas, WA Mann, ML Marshak, JS Marshall, N Mayer, AM McGowan, R Mehdiyev, JR Meier, MD Messier, DG Michael, WH Miller, SR Mishra, J Mitchell, CD Moore, L Mualem, S Mufson, J Musser, D Naples, JK Nelson, HB Newman, RJ Nichol, TC Nicholls, WP Oliver, M Orchanian, J Paley, RB Patterson, G Pawloski, GF Pearce, EA Peterson, R Pittam

Abstract:

The shadowing of cosmic ray primaries by the moon and sun was observed by the MINOS far detector at a depth of 2070 mwe using 83.54 million cosmic ray muons accumulated over 1857.91 live-days. The shadow of the moon was detected at the 5.6 σ level and the shadow of the sun at the 3.8 σ level using a log-likelihood search in celestial coordinates. The moon shadow was used to quantify the absolute astrophysical pointing of the detector to be 0.17 ± 0.12°. Hints of interplanetary magnetic field effects were observed in both the sun and moon shadow. © 2010 Elsevier B.V. All rights reserved.

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Improved Search for Muon-Neutrino to Electron-Neutrino Oscillations in MINOS

PHYSICAL REVIEW LETTERS 107:18 (2011) ARTN 181802

Authors:

P Adamson, DJ Auty, DS Ayres, C Backhouse, G Barr, M Betancourt, M Bishai, A Blake, GJ Bock, DJ Boehnlein, D Bogert, SV Cao, S Cavanaugh, D Cherdack, S Childress, JAB Coelho, L Corwin, D Cronin-Hennessy, IZ Danko, JK de Jong, NE Devenish, MV Diwan, M Dorman, CO Escobar, J Evans, E Falk, GJ Feldman, MV Frohne, HR Gallagher, RA Gomes, MC Goodman, P Gouffon, N Graf, R Gran, K Grzelak, A Habig, J Hartnell, R Hatcher, A Himmel, A Holin, X Huang, J Hylen, GM Irwin, Z Isvan, DE Jaffe, C James, D Jensen, T Kafka, SMS Kasahara, G Koizumi, S Kopp, M Kordosky, A Kreymer, K Lang, G Lefeuvre, J Ling, PJ Litchfield, L Loiacono, P Lucas, WA Mann, ML Marshak, M Mathis, N Mayer, AM McGowan, R Mehdiyev, JR Meier, MD Messier, DG Michael, WH Miller, SR Mishra, J Mitchell, CD Moore, L Mualem, S Mufson, J Musser, D Naples, JK Nelson, HB Newman, RJ Nichol, JA Nowak, JP Ochoa-Ricoux, WP Oliver, M Orchanian, J Paley, RB Patterson, G Pawloski, GF Pearce, S Phan-Budd, RK Plunkett, X Qiu, J Ratchford, B Rebel, C Rosenfeld, HA Rubin, MC Sanchez, J Schneps, A Schreckenberger, P Schreiner, P Shanahan, R Sharma, A Sousa, N Tagg, RL Talaga, J Thomas, MA Thomson, R Toner, D Torretta, G Tzanakos, J Urheim, P Vahle, B Viren, JJ Walding, A Weber, RC Webb, C White, L Whitehead, SG Wojcicki, T Yang, R Zwaska

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Measurement of the underground atmospheric muon charge ratio using the MINOS Near Detector

PHYSICAL REVIEW D 83:3 (2011) ARTN 032011

Authors:

P Adamson, C Andreopoulos, DJ Auty, DS Ayres, C Backhouse, G Barr, WL Barrett, P Bhattarai, M Bishai, A Blake, GJ Bock, DJ Boehnlein, D Bogert, S Budd, S Cavanaugh, D Cherdack, S Childress, BC Choudhary, JAB Coelho, SJ Coleman, L Corwin, D Cronin-Hennessy, D Damiani, IZ Danko, JK de Jong, NE Devenish, MV Diwan, M Dorman, CO Escobar, JJ Evans, E Falk, GJ Feldman, TH Fields, MV Frohne, HR Gallagher, RA Gomes, MC Goodman, P Gouffon, N Graf, R Gran, N Grant, K Grzelak, A Habig, D Harris, PG Harris, J Hartnell, R Hatcher, A Himmel, A Holin, X Huang, J Hylen, J Ilic, GM Irwin, Z Isvan, DE Jaffe, C James, D Jensen, T Kafka, SMS Kasahara, G Koizumi, S Kopp, M Kordosky, Z Krahn, A Kreymer, K Lang, G Lefeuvre, J Ling, PJ Litchfield, L Loiacono, P Lucas, WA Mann, ML Marshak, N Mayer, AM McGowan, R Mehdiyev, JR Meier, MD Messier, DG Michael, WH Miller, SR Mishra, J Mitchell, CD Moore, J Morfin, L Mualem, S Mufson, J Musser, D Naples, JK Nelson, HB Newman, RJ Nichol, JA Nowak, WP Oliver, M Orchanian, J Paley, RB Patterson, G Pawloski, GF Pearce, R Pittam, RK Plunkett, X Qiu, J Ratchford, TM Raufer, B Rebel, J Reichenbacher, PA Rodrigues, C Rosenfeld, HA Rubin, VA Ryabov, MC Sanchez, N Saoulidou, J Schneps, P Schreiner, P Shanahan, A Sousa, M Strait, N Tagg, RL Talaga, J Thomas, MA Thomson, G Tinti, R Toner, G Tzanakos, J Urheim, P Vahle, B Viren, A Weber, RC Webb, C White, L Whitehead, SG Wojcicki, DM Wright, T Yang, R Zwaska

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The T2K near detector data acquisition systems

Conference Record - 2010 17th IEEE-NPSS Real Time Conference, RT10 (2010)

Authors:

M Thorpe, C Angelsen, G Barr, C Metelko, T Nicholls, G Pearce, N West

Abstract:

T2K is a second generation long-baseline experiment in Japan, designed to perform precision studies of neutrino oscillations. A neutrino beam originating at the J-PARC facility is sampled by two near detectors, approximately 280m distant from the source and directed towards the Kamioka underground facility, 295km distant, where the Super-Kamiokande water Cerenkov detector is situated. Both the on-axis (INGRID) and off-axis (ND280) near detectors employ the MIDAS framework for their data acquisition systems. Events are selected via a flexible hardware trigger, which allows mixed operating modes incorporating beam spill, cosmic and calibration triggers. Data are acquired from the front-end electronics over optical gigabit Ethernet links by custom MIDAS front-end applications distributed over a cluster of Linux computers. Event fragments from all sub-detectors are merged and logged on a central backend processor and then copied to remote storage for longterm archival. The system is also designed to allow flexible partitioning of sub-detectors for standalone diagnostics and calibration. We present the design of the DAQ system and report on experience gathered during early operation of the near detectors. © 2010 IEEE.

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Search for lorentz invariance and CPT violation with the MINOS Far detector

Physical Review Letters 105:15 (2010)

Authors:

P Adamson, DJ Auty, DS Ayres, C Backhouse, G Barr, WL Barrett, M Bishai, A Blake, GJ Bock, DJ Boehnlein, D Bogert, C Bower, S Budd, S Cavanaugh, D Cherdack, S Childress, BC Choudhary, JAB Coelho, JH Cobb, SJ Coleman, L Corwin, JP Cravens, D Cronin-Hennessy, IZ Danko, JK De Jong, NE Devenish, MV Diwan, M Dorman, CO Escobar, JJ Evans, E Falk, GJ Feldman, MV Frohne, HR Gallagher, RA Gomes, MC Goodman, P Gouffon, R Gran, N Grant, K Grzelak, A Habig, D Harris, PG Harris, J Hartnell, R Hatcher, A Himmel, A Holin, X Huang, J Hylen, J Ilic, GM Irwin, Z Isvan, DE Jaffe, C James, D Jensen, T Kafka, SMS Kasahara, G Koizumi, S Kopp, M Kordosky, Z Krahn, A Kreymer, K Lang, G Lefeuvre, J Ling, PJ Litchfield, L Loiacono, P Lucas, WA Mann, ML Marshak, N Mayer, AM McGowan, R Mehdiyev, JR Meier, MD Messier, DG Michael, JL Miller, WH Miller, SR Mishra, J Mitchell, CD Moore, L Mualem, S Mufson, J Musser, D Naples, JK Nelson, HB Newman, RJ Nichol, WP Oliver, M Orchanian, J Paley, RB Patterson, T Patzak, G Pawloski, GF Pearce, R Pittam, RK Plunkett, J Ratchford, TM Raufer, B Rebel

Abstract:

We searched for a sidereal modulation in the MINOS far detector neutrino rate. Such a signal would be a consequence of Lorentz and CPT violation as described by the standard-model extension framework. It also would be the first detection of a perturbative effect to conventional neutrino mass oscillations. We found no evidence for this sidereal signature, and the upper limits placed on the magnitudes of the Lorentz and CPT violating coefficients describing the theory are an improvement by factors of 20-510 over the current best limits found by using the MINOS near detector. © 2010 The American Physical Society.

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Giles Barr

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Observation in the MINOS far detector of the shadowing of cosmic rays by the sun and moon

Authors:

Abstract:

Improved Search for Muon-Neutrino to Electron-Neutrino Oscillations in MINOS

Authors:

Measurement of the underground atmospheric muon charge ratio using the MINOS Near Detector

Authors:

The T2K near detector data acquisition systems

Authors:

Abstract:

Search for lorentz invariance and CPT violation with the MINOS Far detector

Authors:

Abstract:

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Giles Barr

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Observation in the MINOS far detector of the shadowing of cosmic rays by the sun and moon

Authors:

Abstract:

Improved Search for Muon-Neutrino to Electron-Neutrino Oscillations in MINOS

Authors:

Measurement of the underground atmospheric muon charge ratio using the MINOS Near Detector

Authors:

The T2K near detector data acquisition systems

Authors:

Abstract:

Search for lorentz invariance and CPT violation with the MINOS Far detector

Authors:

Abstract: