On the use of large pixel PIN diode array in plasma diagnostics

Silicon PIN diodes tailored for x-ray diagnostics of high-temperature plasmas were investigated. Their spectral responsivity was determined from the direct calibration of the diodes by x-rays and indirectly through the bombardment by monoenergetic electrons, the accuracy of the calibration amounts to 11.5 %. The single diodes are used in combination with an absorption foil technique, the large pixel PIN diode array was utilized in a compact spectrometer for monitoring the electron temperature and density of laser produced plasma. The construction of the spectrometer and an example of experimental results are presented.The authors would like to thank M. Chvojka, B. Kralíková, K. Maek, J. Skála and other scientists from the staff of laser system Perun for the assistance in interaction experiments and E. Tegeler and M. Krumrey of the Radiometric Laboratory of the Physikalisch-Technische Bundesanstalt at the electron storage ring BESSY for measuring the diode responsivity in VUV spectral region.