TIGRESS--The TRIUMF-ISAC Gamma-Ray Escape-Suppressed Spectrometer

ORAL

Abstract

TIGRESS is a next generation $\gamma$-ray spectrometer designed to be used at the TRIUMF radioactive beam facilities ISAC and ISAC-II. It will consist of 12 clover-geometry HPGe detectors that are suppressed with BGO-CsI anti-Compton shields. The outer contacts of each crystal is 8-fold segmented, including 2 longitudinal segments. The $\gamma$-ray interaction location is determined through analysis of pulse waveforms from the 32 outer contacts. Detailed coincidence scans of the prototype detector deduced a mean position sensitivity of 0.44 mm for single-interactions. Delivery of the production modules, with a slightly modified segmentation scheme, has commenced, and an in-beam test of the detector performance is currently scheduled for late July. Results of the characterization of the new production detectors, including a preliminary analysis of the ability to determine interaction locations in-beam, along with the performance of the suppression shield, will be presented.

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Authors

  • P.E. Garrett

  • C. Andreoiu

  • D. Bandyopadhyay

  • P. Finlay

  • G.F. Grinyer

  • B. Hyland

  • A.A. Phillips

  • M.A. Schumaker

  • C.E. Svensson

    • University of Guelph

  • A.A. Andreyev

  • G.C. Ball

  • R.S. Chakrawarthy

  • H. Cowan

  • G. Hackman

  • A.C. Morton

  • C.J. Pearson

  • M.B. Smith

    • TRIUMF

  • R.A.E. Austin

    • Saint Mary's University

  • A.J. Boston

  • H.C. Scraggs

    • University of Liverpool

  • T.E. Drake

    • University of Toronto

  • J.P. Martin

    • Universit\'e de Montr\'eal

  • F. Sarazin

    • Colorado School of Mines

  • J.C. Waddington

  • L.M. Watters

    • McMaster University