Speaker
Blair Jamieson
(University of British Columbia)
Description
The Near Detector at 280m (ND280) has been operating for over a year
in the Tokai to Kamioka (T2K) neutrino beam. The detector is designed
to provide a good knowledge of the neutrino beam before the neutrinos
oscillate, including measuring the backgrounds and their energy
dependence. An important feature of ND280 is the tracker which
consists of two active scintillator-bar target systems sandwiched
between three large time projection chambers (TPCs), and surrounded by
calorimeters and a large dipole magnet for charged particle tracking.
Novel features of the TPCs are the rectangular construction from
composite panels, the bulk micromegas detectors for gas amplification,
electronics readout based on a new ASIC, and the photoelectron
calibration system. This talk will review the design, operation and
performance of the TPCs as deduced from measurements with particle
beams, cosmic rays, and the photoelectron calibration system.
Author
Blair Jamieson
(University of British Columbia)
