The BLAST experiment

D. Hasell*, T. Akdogan, R. Alarcon, W. Bertozzi, E. Booth, T. Botto, J.R. Calarco, B. Clasie, C. Crawford, A. DeGrush, K. Dow, D. Dutta, M. Farkhondeh, R. Fatemi, O. Filoti, W. Franklin, H. Gao, E. Geis, S. Gilad, W. HersmanM. Holtrop, E. Ihloff, P. Karpius, J. Kelsey, M. Kohl, H. Kolster, S. Krause, T. Lee, A. Maschinot, J. Matthews, K. McIlhany, N. Meitanis, R. Milner, J. Rapaport, R. Redwine, J. Seely, A. Shinozaki, A. Sindile, S. Sirca, T. Smith, S. Sobczynski, M. Tanguay, B. Tonguc, C. Tschalaer, E. Tsentalovich, W. Turchinetz, J.F.J. van den Brand, J. van der Laan, F. Wang, T. Wise

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review


The Bates large acceptance spectrometer toroid (BLAST) experiment was operated at the MIT-Bates Linear Accelerator Center from 2003 until 2005. The detector and experimental program were designed to study, in a systematic manner, the spin-dependent electromagnetic interaction in few-nucleon systems. As such the data will provide improved measurements for neutron, proton, and deuteron form factors. The data will also allow details of the reaction mechanism, such as the role of final state interactions, pion production, and resonances to be studied. The experiment used: a longitudinally polarized electron beam stored in the South Hall Storage Ring; a highly polarized, isotopically pure, internal gas target of hydrogen or deuterium provided by an atomic beam source: and a symmetric, general purpose detector based on a toroidal spectrometer with tracking. time-of-flight, Cherenkov, and neutron detectors. Details of the experiment and operation are presented. (C) 2009 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)247-262
Number of pages16
JournalNuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment
Issue number3
Publication statusPublished - 21 May 2009
Externally publishedYes


  • Storage ring
  • Polarized target
  • Polarized beam
  • Tracking detector
  • Cherenkov detector
  • Scintillator detector
  • GAAS

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