Characterising a Si(Li) detector element for the SIXA X-ray spectrometer

The detection efficiency and response function of a Si(Li) detector element for the SIXA spectrometer have been determined in the 500 eV to 5 keV energy range using synchrotron radiation emitted at a bending magnet of the electron storage ring BESSY, which is a primary radiation standard. The agreement between the measured spectrum and the model calculation is better than 2%. PACS: 95.55.Ka; 07.85.Nc; 29.40.Wk; 85.30.De Keywords: Si(Li) detectors, X-ray spectrometers, detector calibration, X-ray response, spectral lineshapeComment: 11 pages, 11 PostScript figures, uses elsart.sty, submitted to Nucl. Instrum. Meth.

Highly Sensitive Beam Size Monitor for pA Currents at the MLS Electron Storage Ring

For the operation of the Metrology Light Source MLS [1], the electron storage ring of the Physikalisch Technische Bundesanstalt PTB , as a primary radiation source standard all storage ring parameters have to be known absolutely. For the measurement of the electron beam size and the control of the stability of the orbit location a new imaging system has been set up, that operates at very different intensity levels covering more than 11 decades, given by the variation of the electron beam current. The system uses a commercial zoom lens for the achromatic optical imaging of the electron beam source point onto two different camera systems. One camera system is for life imaging of the source point at electron beam currents from 200 mA down to some amp; 956;A. The second system is a cooled CCD camera that allows imaging of the electron beam source size and location at very low currents, down to only one stored electro

Accurate Electron Beam Size Measurement at the Metrology Light Source

For the operation of the Metrology Light Source MLS , the dedicated electron storage ring of the Physikalisch Technische Bundesanstalt PTB , as the national primary radiation source standard from the near infrared to the vacuum ultraviolet spectral region, all storage ring parameters which are relevant for the calculation of the radiant intensity by the Schwinger equation have to be known absolutely with small uncertainties. For the measurement of the effective vertical electron beam size a Bragg polarimeter, operating at a photon energy of 1103 eV, has been designed and successfully put into operatio

Accurate Measurement of the MLS Electron Storage Ring Parameters

The Physikalisch Technische Bundesanstalt PTB, the German national metrology institute uses the Metrology Light Source MLS as a primary radiation source standard. This requires the accurate measurement of all storage ring parameters needed for the calculation of the spectral radiant intensity of the synchrotron radiation. Therefore, instrumentation has been installed in the MLS for the measurement of, e.g., the electron beam energy, the electron beam current or the electron beam size that outper forms that usually installed in electron storage rings used as a common synchrotron radiation sourc