Energy resolution of gamma-ray spectroscopy of JET plasmas with a LaBr

M. Nocente, M. Tardocchi, I. Chugunov, R.C. Pereira, T. Edlington, A.M. Fernandes, D. Gin, G. Grosso, V. Kiptily, A. Murari, A. Neto, E. Perelli Cippo, A. Pietropaolo, I. Proverbio, A. Shevelev, J. Sousa, B. Syme, G. Gorini

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A new high efficiency, high resolution, fast γ -ray spectrometer was recently installed at the JET tokamak. The spectrometer is based on a LaBr3(Ce) scintillator coupled to a photomultiplier tube. A digital data acquisition system is used to allow spectrometry with event rates in excess of 1 MHz expected in future JET DT plasmas. However, at the lower rates typical of present day experiments, digitization can degrade the energy resolution of the system, depending on the algorithms used for extracting pulse height information from the digitized pulses. In this paper, the digital and analog spectrometry methods were compared for different experimental conditions. An algorithm based on pulse shape fitting was developed, providing energy resolution equivalent to the traditional analog spectrometry method. © 2010 EURATOM.
Original languageEnglish
Article number10D321
Pages (from-to)-
JournalReview of Scientific Instruments
Issue number10
Publication statusPublished - Oct 2010
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Instrumentation

Cite this

Nocente, M., Tardocchi, M., Chugunov, I., Pereira, R. C., Edlington, T., Fernandes, A. M., ... Gorini, G. (2010). Energy resolution of gamma-ray spectroscopy of JET plasmas with a LaBr. Review of Scientific Instruments, 81(10), -. [10D321].