A microstrip germanium detector for position-sensitive X-ray spectroscopy

For the current X-ray spectroscopy program at the ESR storage ring (GSI-Darmstadt), a position-sensitive germanium detector system was completed. The position-sensitive structure of the detector was realized on an area of 47/spl times/23.4 mm by an array of 200 strips (200 /spl mu/m wide and 23.4 mm...

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Bibliographic Details
Published in:	IEEE transactions on nuclear science Vol. 48; no. 4; pp. 1048 - 1052
Main Authors:	Protic, D., Stohlker, T., Ebeyer, H.F., Bojowald, J., Borchert, G., Gumberidze, A., Hamacher, A., Kozhuharov, C., Ma, X., Mohos, I.
Format:	Journal Article
Language:	English
Published:	New York IEEE 01-08-2001 The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:	Arrays Contact Detectors Energy resolution Germanium Microstrip Paramagnetic resonance Position sensitive particle detectors Spectrometers Spectroscopy Spectrum analysis Storage rings Strip Strips Studies X-ray detection X-ray detectors X-rays
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Summary:	For the current X-ray spectroscopy program at the ESR storage ring (GSI-Darmstadt), a position-sensitive germanium detector system was completed. The position-sensitive structure of the detector was realized on an area of 47/spl times/23.4 mm by an array of 200 strips (200 /spl mu/m wide and 23.4 mm long) separated by 35-/spl mu/m-wide grooves etched through boron implanted contact. The thickness of the detector, including a 0.6-mm-thick Li-diffused rear contact, amounts to 4.1 mm. Each strip has been joined to a preamplifier placed outside the cryostat with printed leads inside the flexible Kapton-foil. The energy resolution of the strips was about 1.8 keV [FWHM] for 60-keV photons. Coincidences between neighboring strips were measured showing that a time resolution of 70 ns [FWHM] was obtained. First preliminary results obtained with the detector mounted at the transmission X-ray spectrometer FOCAL demonstrated that an energy resolution better than 100 eV is achievable together with a high detection efficiency. Along with a new kind of X-ray spectrometer, this detector may play a key role for the next step of high-precision X-ray experiments: aiming for a precise test of quantum electrodynamics in the heaviest one-electron systems, such as hydrogen-like uranium.
Bibliography:	SourceType-Scholarly Journals-2 ObjectType-Feature-2 ObjectType-Conference Paper-1 content type line 23 SourceType-Conference Papers & Proceedings-1 ObjectType-Article-3 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1
ISSN:	0018-9499 1558-1578
DOI:	10.1109/23.958721