Seminar Details

Particle Flow Algorithm Based Collider Detector Prototypes

Kurt Francis, Argonne National Laboratory (ANL)
Wednesday, May 29, 9:30 AM - Special Seminar
NSCL Seminar Room

Particle Flow Algorithms (PFAs) have been proposed as a method of improving the jet energy resolution of future colliding beam detectors. PFAs require calorimeters with high granularity to enable three-dimensional imaging of events. The Calorimeter for the Linear Collider Collaboration (CALICE) is developing and testing prototypes of such highly segmented calorimeters. In this context, a prototype detector designed for post-hadronic calorimeter sampling and muon tracking for an International Linear Collider (ILC) detector was built, installed, and tested without a magnetic field between 2006 and 2009 at CERN and Fermilab as part of the CALICE program. The ítail catcher/muon trackerí (TCMT) is comprised of 320 extruded scintillator strips (dimensions 1000 x 50 x 5 mm3) packaged in 16 one-meter square planes interleaved between steel plates. The scintillator strips were read out with wavelength shifting fibers and first generation silicon photomultipliers. The planes were arranged with alternating horizontal and vertical strip rientations. Data were collected for muons and pions in the energy range 6 GeV to 80 GeV. To further explore designs for PFA based detectors, a large prototype of a Digital Hadron Calorimeter (DHCAL) was developed and constructed by a group led by Argonne National Laboratory. The DHCAL consists of 52 layers, instrumented with Resistive Plate Chambers (RPCs) and interleaved with steel absorber plates. The RPCs are read out by 1 x 1 cm2 pads with a 1-bit resolution (digital readout). The DHCAL prototype has approximately 480,000 readout channels. The DHCAL was installed at the Fermilab Test Beam Facility in 2010 and 2011 and at CERN with tungsten absorber in place of the steel absorber in 2012. This talk reports on the design, construction and commissioning of the TCMT and DHCAL.