6533b828fe1ef96bd1288f03

RESEARCH PRODUCT

The Barrel DIRC detector of PANDA

A. HayrapetyanS. StelterK. PetersA. BeliasM. CardinaliM. SchmidtM. KrebsMichael DürenConcettina SfientiL. SchmittA. AliPatrick AchenbachA. LehmannR. DzhygadloM. BöhmMichaela ThielT. WasemJ. SchwieningD. LehmannS. SchlimmeC. SchwarzJ. RiekeF. UhligK. FöhlG. SchepersM. TraxlerA. GerhardtK. KreutzfeldM. HoekM. PfaffingerE. EtzelmüllerW. Lauth

subject

PhysicsNuclear and High Energy PhysicsLuminosity (scattering theory)Physics - Instrumentation and DetectorsCalorimeter (particle physics)SpectrometerMeson010308 nuclear & particles physicsPhysics::Instrumentation and DetectorsDetectorFOS: Physical sciencesInstrumentation and Detectors (physics.ins-det)01 natural sciencesCharged particleParticle identification030218 nuclear medicine & medical imagingNuclear physics03 medical and health sciences0302 clinical medicine0103 physical sciencesHigh Energy Physics::ExperimentPrismNuclear ExperimentInstrumentation

description

The PANDA experiment is one of the four large experiments being built at FAIR in Darmstadt. It will use a cooled antiproton beam on a fixed target within the momentum range of 1.5 to 15 GeV/c to address questions of strong QCD, where the coupling constant $\alpha_s \gtrsim 0.3$. The luminosity of up to $2 \cdot 10^{32} cm^{-2}s^{-1}$ and the momentum resolution of the antiproton beam down to \mbox{$\Delta$p/p = 4$\cdot10^{-5}$} allows for high precision spectroscopy, especially for rare reaction processes. Above the production threshold for open charm mesons the production of kaons plays an important role for identifying the reaction. The DIRC principle allows for a compact particle identification for charged particles in a hermetic detector, limited in size by the electromagnetic lead tungstate calorimeter. The Barrel DIRC in the target spectrometer covers polar angles between $22^\circ$ and $140^\circ$ and will achieve a pion-kaon separation of 3 standard deviations up to 3.5 GeV/$c$. Here, results of a test beam are shown for a single radiator bar coupled to a prism with $33^\circ$ opening angle, both made from synthetic fused silica read out with a photon detector array with 768 pixels.

10.1016/j.nima.2018.10.159http://arxiv.org/abs/1901.08432