Computer Science
Scientific paper
Jan 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999rsci...70..656t&link_type=abstract
Review of Scientific Instruments, Volume 70, Issue 1, pp. 656-658 (1999).
Computer Science
16
X-Ray And Gamma-Ray Measurements, X- And Gamma-Ray Sources, Mirrors, Gratings, And Detectors, Photodetectors
Scientific paper
A 1-mm-square diamond photoconductive detector (PCD) has been installed on the LLNL Nova laser system, for use as a broadband soft x-ray power diagnostic. The PCD is installed behind an array of pinholes, which cast multiple, overlapping images of the source onto the diamond. This allows reduction of the x-ray intensity, to avoid saturation problems, while avoiding the spectral dependency of thin film filters. The diode current is read out on a 5 GHz bandwidth scope. The system is calibrated by comparison to an absolutely calibrated array of filtered vacuum x-ray photodiodes (``dante''). The time response of the PCD and its bias electronics have been characterized using the 5th harmonic (210 nm) of a short pulse (<1 ps) Ti: sapphire laser. The data show a fast rise, limited by the 5 GHz scope bandwidth, and a slower fall off, characterized by an RC time of order 200 ps.
Bell Paul
Costa Ricardo
Hargrove D.
Landen Otto L.
Turner Eugene R.
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