There is strong observational evidence that a quasi-thermal population of electrons (or pairs) exists in compact X-ray sources. It is, however, unclear what mechanism thermalizes the particles. Here, two processes, Coulomb scattering and synchrotron self-absorption, that may be responsible for the thermalization, are reviewed. The parameter spaces in which respective process dominates are given...

We analyse the temperature-polarization cross-correlation in the Galactic synchrotron template that we recently developed, and between the template and CMB temperature maps derived from WMAP data. Since the polarized synchrotron template itself uses WMAP data, we can estimate residual synchrotron contamination in the CMB C l angular spectrum. While C 2 appears to be contaminated by synchrotron,...

We have developed on the DIFFABS-SOLEIL beamline a biaxial tensile machine working in the synchrotron environment for in situ diffraction characterization of thin polycrystalline films mechanical response. The machine has been designed to test compliant substrates coated by the studied films under controlled, applied strain field. Technological challenges comprise the sample design including fi...

We present analytic approximations to the optically thin synchrotron and synchrotron self-Compton (SSC) spectra when Klein-Nishina (KN) effects are important and pair production and external radiation fields can be neglected. This theory is useful for analytical treatment of radiation from astrophysical sources, such as gamma-ray bursts (GRBs), active galactic nuclei and pulsar wind nebula, whe...

The new heavy-ion synchrotron SIS100 [2] will provide high-intensity beams at relativistic energies in the rigidity range (27-100) Tm. In order to produce secondary fragments, the ion beam will interact with the Super-FRS production target, where the beam spot is required to be about (1 × 2) mm in size. Therefore it is necessary to perform careful investigations of the transport beam line betwe...

ON231 was observed with BeppoSAX in May and June 1998, following an exceptional optical outburst which occured in April–May. We measured the X–ray spectrum from 0.1 up to 100 keV. In both occasions the spectrum had a concave shape, with a break detected at about 4 and 2.5 keV, respectively. We interpret the steeper component at energies below the break as due to synchrotron emission and the ext...

High intensity operation as planned for the synchrotron SIS100 is expected to lead to ion bunch oscillations in longitudinal phase space that must actively be damped [1]. Therefore a longitudinal feedback system has to be designed that is faster than Landau damping and copes with the expected growth rates of instabilities. One task of this feedback system is the damping of quadrupole oscillatio...

Hamburger Synchrotron-Strahlungslabor, H A S Y M at DESY, Notkestr. 85,22607 Hamburg, Germany * Fachbereich 7 Physik &r Universitat Gesamthochschule Siegen, Adolf-Reichwein-Str. 2 , 57068 Siegen, Germany ** Kardiologische Abteilung der Medizinischen Klinik, Universitats-Krankt.nhaus Eppendoif, Martinistr. 52,20251 Hamburg, Germany *** Herz-Kreislauf-Klinik, Romstedter Str. 25,29549 Bad Bevensen...

The spectral energy distribution (SED) of blazars typically has a double-humped appearance usually interpreted in terms of synchrotron self-Compton models. In proton blazar models, the SED is instead explained in terms of acceleration of protons and subsequent cascading. We discuss a variation of the Synchrotron Proton Blazar model, first proposed by Mücke & Protheroe (1999), in which the low e...