Dresden 2000 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 13: Postersitzung / Instrumentation und Anwendungen
HK 13.20: Poster
Donnerstag, 23. März 2000, 10:15–12:45, B 117
A high-rate X-ray detector for exotic-atom spectroscopy — •H. Gorke1, A. Ackens1, U. Clemens1, D. Gotta2, P. Holl3, H. Loevenich1, D. Maeckelburg1, M. Ramm1, L. Strüder4, C. von Zanthier3, L.M. Simons5, and K. Zwoll1 — 1Zentrallabor für Elektronik, und — 2Institut für Kernphysik, Forschungszentrum Jülich — 3KETEK, München — 4Halbleiterlabor des MPI, Garching — 5Paul-Scherrer-Institut(PSI), Switzerland
The spectroscopy of the characteristic X-radiation from exotic atoms by high-resolution semiconductor detectors faces the problem of large fluxes available at meson factories or synchroton radiation laboratories. A high-rate detector system was set-up based on a fully depleted Charge-Coupled Device (pn-type CCD) having a pixel size of 150 µ m. Up to 600 images per second can be processed on-line of a 1 cm2 pn-CCD chip with a high-speed front-end double CPU and using a fast optical link. The high read-out frequency allow an efficient background reduction from the analysis of the hit pattern even for the environment conditions produced by high-intensity pion beams. Results are reported from first measurements of pionic atom X-rays at the Paul-Scherrer-Institut (PSI).