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An angle-sensitive detection system for scattered heavy ions

A compact detection system for heavy ions scattered in collisions at the Coulomb barrier is presented. This system, consisting of four identical, low-pressure Parallel Plate Avalanche Counter (PPAC) modules with two sensitive layers each, was built to operate in an ultra-high-vacuum environment insi...

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Bibliographic Details
Main Authors: Ganz, R. (Author) , Thee, P (Author) , Bär, R. (Author) , Bethge, K. (Author) , Bokemeyer, H. (Author) , Folger, H. (Author) , Samek, M. (Author) , Salabura, P. (Author) , Schwalm, Dirk (Author) , Stiebing, K. E. (Author)
Format: Article (Journal)
Language:English
Published: 4 August 1999
In: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment
Year: 1999, Volume: 432, Issue: 2, Pages: 379-391
ISSN:1872-9576
DOI:10.1016/S0168-9002(99)00520-3
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/S0168-9002(99)00520-3
Verlag, lizenzpflichtig, Volltext: http://www.sciencedirect.com/science/article/pii/S0168900299005203
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Author Notes:R Ganz, P Thee, R Bär, K Bethge, H Bokemeyer, H Folger, M Samek, P Salabura, D Schwalm, K. E Stiebing
Description
Summary:A compact detection system for heavy ions scattered in collisions at the Coulomb barrier is presented. This system, consisting of four identical, low-pressure Parallel Plate Avalanche Counter (PPAC) modules with two sensitive layers each, was built to operate in an ultra-high-vacuum environment inside the EPoS II solenoid spectrometer at GSI Darmstadt. The detector covers polar angles between 20° and 70° with respect to the beam axis, and about 80% of 2π in azimuthal angle. Segmented cathodes and a delay-line read-out allow for a determination of both angles with a precision of δΘ≈0.7° in polar and δΦ≈1.5° in azimuthal angle, respectively. The system has been proven to be capable of handling instantaneous rates of up to 5×105 detected ions per second per module. It neither exhibits the degradation of detection efficiency nor loss in resolution over a 500 h period of a 6 MeV/u238U+181Ta measurement at average luminosities of 8×1027cm−2s−1.
Item Description:Gesehen am 30.11.2020
Physical Description:Online Resource
ISSN:1872-9576
DOI:10.1016/S0168-9002(99)00520-3

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