15 research outputs found
Lithographic integration of Aluminum read-out traces on CVD diamond for the CBM micro vertex detector
Fabrication and characterization of efficiency and radiation tolerance of 3D diamond detectors
STRASSE: A Silicon Tracker for Quasi-free Scattering Measurements at the RIBF
STRASSE (Silicon Tracker for RAdioactive nuclei Studies at SAMURAI
Experiments) is a new detection system under construction for quasi-free
scattering (QFS) measurements at 200-250 MeV/nucleon at the RIBF facility of
the RIKEN Nishina Center. It consists of a charged-particle silicon tracker
coupled with a dedicated thick liquid hydrogen target (up to 150-mm long) in a
compact geometry to fit inside large scintillator or germanium arrays. Its
design was optimized for two types of studies using QFS: missing-mass
measurements and in-flight prompt -ray spectroscopy. This article
describes (i) the resolution requirements needed to go beyond the sensitivity
of existing systems for these two types of measurements, (ii) the conceptual
design of the system using detailed simulations of the setup and (iii) its
complete technical implementation and challenges. The final tracker aims at a
sub-mm reaction vertex resolution and is expected to reach a missing-mass
resolution below 2 MeV in for reactions when combined with
the CsI(Na) CATANA array.Comment: 25 pages, 29 figure
Challenges in QCD matter physics - The Compressed Baryonic Matter experiment at FAIR
Substantial experimental and theoretical efforts worldwide are devoted to
explore the phase diagram of strongly interacting matter. At LHC and top RHIC
energies, QCD matter is studied at very high temperatures and nearly vanishing
net-baryon densities. There is evidence that a Quark-Gluon-Plasma (QGP) was
created at experiments at RHIC and LHC. The transition from the QGP back to the
hadron gas is found to be a smooth cross over. For larger net-baryon densities
and lower temperatures, it is expected that the QCD phase diagram exhibits a
rich structure, such as a first-order phase transition between hadronic and
partonic matter which terminates in a critical point, or exotic phases like
quarkyonic matter. The discovery of these landmarks would be a breakthrough in
our understanding of the strong interaction and is therefore in the focus of
various high-energy heavy-ion research programs. The Compressed Baryonic Matter
(CBM) experiment at FAIR will play a unique role in the exploration of the QCD
phase diagram in the region of high net-baryon densities, because it is
designed to run at unprecedented interaction rates. High-rate operation is the
key prerequisite for high-precision measurements of multi-differential
observables and of rare diagnostic probes which are sensitive to the dense
phase of the nuclear fireball. The goal of the CBM experiment at SIS100
(sqrt(s_NN) = 2.7 - 4.9 GeV) is to discover fundamental properties of QCD
matter: the phase structure at large baryon-chemical potentials (mu_B > 500
MeV), effects of chiral symmetry, and the equation-of-state at high density as
it is expected to occur in the core of neutron stars. In this article, we
review the motivation for and the physics programme of CBM, including
activities before the start of data taking in 2022, in the context of the
worldwide efforts to explore high-density QCD matter.Comment: 15 pages, 11 figures. Published in European Physical Journal