12 research outputs found
A recoil detector for the measurement of antiproton-proton elastic scattering at angles close to 90
The design and construction of a recoil detector for the measurement of
recoil protons of antiproton-proton elastic scattering at scattering angles
close to 90 are described. The performance of the recoil detector has
been tested in the laboratory with radioactive sources and at COSY with proton
beams by measuring proton-proton elastic scattering. The results of laboratory
tests and commissioning with beam are presented. Excellent energy resolution
and proper working performance of the recoil detector validate the conceptual
design of the KOALA experiment at HESR to provide the cross section data needed
to achieve a precise luminosity determination at the PANDA experiment.Comment: 10 pages, 15 figure
Near Infrared Diode Laser THz Systems
The generation and detection of radiation in the THz frequency range can be
achieved with many different electronic and photonic concepts. Among the many
different photonic THz systems the most versatile are based on diode lasers.
In this paper we describe and review the different concepts and optimization
ideas for diode laser based THz systems in order to achieve the best
performance for different types of THz setups.</p
Measurement of proton-proton elastic scattering into the Coulomb region at Pbeam = 2.5, 2.8 and 3.2 GeV/c
The proton--proton elastic differential cross section at very small four momentum transfer squared has been measured at three different incident proton momenta in the range of 2.5 to 3.2 GeV/c by detecting the recoil proton at polar angles close to 90â. The measurement was performed at COSY with the KOALA detector covering the Coulomb-nuclear interference region. The total cross section Ïtot, which has been determined precisely, is consistent with previous measurements. The values of the slope parameter B and the relative real amplitude ratio Ï determined in this experiment alleviate the lack of data in the relevant energy region. This precise data on Ï might be an important check for a new dispersion analysis