Publications (7)
Search for solar axion emission from 7Li and D(p,gamma)3He nuclear decays with the CAST gamma-ray calorimeter
CAST Collaboration, S. Andriamonje, S. Aune +58
We present the results of a search for a high-energy axion emission signal from 7Li (0.478 MeV) and D(p,gamma)3He (5.5 MeV) nuclear transitions using a low-background gamma-ray cal…
The Longitudinal Polarimeter at HERA
M. Beckmann, A. Borissov, S. Brauksiepe +12
The design, construction and operation of a Compton back-scattering laser polarimeter at the HERA storage ring at DESY are described. The device measures the longitudinal polarizat…
TDC Chip and Readout Driver Developments for COMPASS and LHC-Experiments
G. Braun, H. Fischer, J. Franz +7
A new TDC-chip is under development for the COMPASS experiment at CERN. The ASIC, which exploits the 0.6 micrometer CMOS sea-of-gate technology, will allow high resolution time mea…
Implementation of the Dead-Time Free F1 TDC in the COMPASS Detector Readout
H. Fischer, J. Franz, A. Grunemaier +7
In the scope of the COMPASS experiment a multi-purpose, high rate capable TDC with digitisation width of 60 ps has been developed. The integration into the readout system and the f…
CAST constraints on the axion-electron coupling
K. Barth, A. Belov, B. Beltran +53
In non-hadronic axion models, which have a tree-level axion-electron interaction, the Sun produces a strong axion flux by bremsstrahlung, Compton scattering, and axio-recombination…
CAST solar axion search with 3^He buffer gas: Closing the hot dark matter gap
M. Arik, S. Aune, K. Barth +72
The CERN Axion Solar Telescope (CAST) has finished its search for solar axions with 3^He buffer gas, covering the search range 0.64 eV < m_a <1.17 eV. This closes the gap to the co…
F1 - An Eight Channel Time-to-Digital Converter Chip for High Rate Experiments
G. Braun, H. Fischer, J. Franz +9
A new TDC chip has been developed for the COMPASS experiment at CERN. The resulting ASIC offers an unprecedented degree of flexibility and functionality. Its capability to handle h…