The kaon spectrometer at SIS

P. Senger, W. Ahner, P. Baltes, P. Beckerle, Ch Bormann, D. Brill, M. Cieślak, E. Grosse, W. Henning, P. Koczoń, B. Kohlmeyer, W. Konrad, D. Miśkowiec, Ch Müntz, H. Oeschler, H. Pöppl, W. Prokopowicz, F. Pühlhofer, S. Sartorius, R. SchickerB. Schlei, E. Schwab, Y. Shin, J. Speer, J. Stein, K. Stiebing, R. Stock, H. Ströbele, Ch Sturm, K. Völkel, A. Wagner, W. Waluś

Research output: Contribution to journalArticlepeer-review

96 Scopus citations

Abstract

A double-focussing QD magnetic spectrometer has been developed and installed at the SIS heavy-ion facility at GSI in Darmstadt. The spectrometer's primary purpose is to study meson production in energetic nucleus-nucleus collisions in detail. Its compact design is matched to the requirements of kaon detection with short flight path (5-6.5 m), large solid angle (up to 35 msr), wide momentum acceptance ( pmax pmin {reversed tilde equals} 2), maximum momentum 1.6 GeV/c (1.9 GeV/c at reduced solid angle) and reasonable momentum resolution ({reversed tilde equals} 1% without and {reversed tilde equals} 10-3 with ray tracing). A focal-plane length of about 1.5 m allows the efficient use of the detectors necessary for particle identification and ray-tracing, involving wire chambers, time-of-flight scintillators and Cherenkov detectors. Collisions can be characterized by two multiple-module plastic-scintillator hodoscopes detecting reaction fragments in the forward hemisphere. While the primary purpose for the construction of the spectrometer is the measurement of kaons, it can serve as a general purpose magnetic spectrometer. Its large solid angle also allows the study of two-particle correlations.

Original languageEnglish
Pages (from-to)393-411
Number of pages19
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume327
Issue number2-3
DOIs
StatePublished - 1 Apr 1993
Externally publishedYes

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