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The electromagnetic calorimeter for the T2K near detector ND280
Authors
D Allan
C Andreopoulos
+98 more
C Angelsen
GJ Barker
G Barr
S Bentham
I Bertram
S Boyd
K Briggs
RG Calland
J Carroll
SL Cartwright
A Carver
C Chavez
G Christodoulou
J Coleman
P Cooke
G Davies
C Densham
F Di Lodovico
J Dobson
T Duboyski
T Durkin
DL Evans
A Finch
M Fitton
FC Gannaway
A Grant
N Grant
S Grenwood
P Guzowski
D Hadley
M Haigh
PF Harrison
A Hatzikoutelis
TDJ Haycock
A Hyndman
J Ilic
S Ives
AC Kaboth
V Kasey
L Kellet
M Khaleeq
G Kogan
LL Kormos
M Lawe
TB Lawson
C Lister
RP Litchfield
M Lockwood
M Malek
T Maryon
P Masliah
K Mavrokoridis
N McCauley
I Mercer
C Metelko
B Morgan
J Morris
A Muir
M Murdoch
T Nicholls
M Noy
HM O'Keeffe
RA Owen
D Payne
GF Pearce
JD Perkin
E Poplawska
R Preece
W Qian
P Ratoff
T Raufer
M Raymond
M Reeves
D Richards
M Rooney
R Sacco
S Sadler
P Schaack
M Scott
DI Scully
S Short
M Siyad
R Smith
B Still
P Sutcliffe
IJ Taylor
R Terri
LF Thompson
A Thorley
M Thorpe
C Timis
C Touramanis
Melissa Anne Uchida
Y Uchida
A Vacheret
JF Van Schalkwyk
O Veledar
AV Waldron
Publication date
17 October 2013
Publisher
Journal of Instrumentation
Doi
Cite
Abstract
The T2K experiment studies oscillations of an off-axis muon neutrino beam between the J-PARC accelerator complex and the Super-Kamiokande detector. Special emphasis is placed on measuring the mixing angle θ 13 by observing ν e appearance via the sub-dominant νμ ν e oscillation and searching for CP violation in the lepton sector. The experiment includes a sophisticated, off-axis, near detector, the ND280, situated 280 m downstream of the neutrino production target in order to measure the properties of the neutrino beam and to understand better neutrino interactions at the energy scale below a few GeV. The data collected with the ND280 are used to study charged- and neutral-current neutrino interaction rates and kinematics prior to oscillation, in order to reduce uncertainties in the oscillation measurements by the far detector. A key element of the near detector is the ND280 electromagnetic calorimeter (ECal), consisting of active scintillator bars sandwiched between lead sheets and read out with multi-pixel photon counters (MPPCs). The ECal is vital to the reconstruction of neutral particles, and the identification of charged particle species. The ECal surrounds the Pi-0 detector (PØD) and the tracking region of the ND280, and is enclosed in the former UA1/NOMAD dipole magnet. This paper describes the design, construction and assembly of the ECal, as well as the materials from which it is composed. The electronic and data acquisition (DAQ) systems are discussed, and performance of the ECal modules, as deduced from measurements with particle beams, cosmic rays, the calibration system, and T2K data, is described.© 2013 IOP Publishing Ltd and Sissa Medialab srl.The ECal detector has been built and is operated using funds provided by the Science and Technology Facilities Council U.K. Important support was also provided by the collaborating institutions. Individual researchers have been supported by the Royal Society and the European Research Council
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Last time updated on 03/06/2019