  PANDA (anti-Proton ANnihiliation at DArmstadt) is planned to be one of the
four main experiments at the future international accelerator complex FAIR
(Facility for Antiproton and Ion Research) in Darmstadt, Germany. It is going
to address fundamental questions of hadron physics and quantum chromodynamics
using cooled antiproton beams with a high intensity and and momenta between 1.5
and 15 GeV/c. PANDA is designed to reach a maximum luminosity of 2x10^32 cm^2
s. Most of the physics programs require an excellent particle identification
(PID). The PID of hadronic states at the forward endcap of the target
spectrometer will be done by a fast and compact Cherenkov detector that uses
the detection of internally reflected Cherenkov light (DIRC) principle. It is
designed to cover the polar angle range from 5{\deg} to 22{\deg} and to provide
a separation power for the separation of charged pions and kaons up to 3
standard deviations (s.d.) for particle momenta up to 4 GeV/c in order to cover
the important particle phase space. This document describes the technical
design and the expected performance of the novel PANDA Disc DIRC detector that
has not been used in any other high energy physics experiment (HEP) before. The
performance has been studied with Monte-Carlo simulations and various beam
tests at DESY and CERN. The final design meets all PANDA requirements and
guarantees suffcient safety margins.
