Frontend event selection with an MBD using Q

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A problem common to many complex experiments in Nuclear Physics is the need to provide for event selection at a level beyond that readily available in a fast hardware trigger. This may be desirable as a means of reducing the amount of unwanted data going to tape, or be needed to reduce system deadtime, so as not to miss an infrequent good event. The latter criterion is particularly important at low duty factor accelerators such as LAMPF, where instantaneous trigger rates may be quite high. The need for such an event selection mechanism has arisen in conjunction with the installation ... continued below

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Pages: 3

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Amann, J.F. January 1, 1981.

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Description

A problem common to many complex experiments in Nuclear Physics is the need to provide for event selection at a level beyond that readily available in a fast hardware trigger. This may be desirable as a means of reducing the amount of unwanted data going to tape, or be needed to reduce system deadtime, so as not to miss an infrequent good event. The latter criterion is particularly important at low duty factor accelerators such as LAMPF, where instantaneous trigger rates may be quite high. The need for such an event selection mechanism has arisen in conjunction with the installation of a polarimeter in the focal plane of the High Resolution Spectrometer (HRS) at LAMPF. It has been met using a combination of buffered CAMAC electronics and an enhancement to the LAMPF standard Q data acquisition system. The enhancement to Q allows the experimeter to specify at runtime, a set of simple tests to be performed on each event as it is processed by the MBD, and before it is passed to the PDP-11 for taping and further analysis.

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Pages: 3

Notes

NTIS, PC A02/MF A01.

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  • Topical conference on computerized data acquisition in particle and nuclear physics, Oak Ridge, TN, USA, 28 May 1981

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  • Report No.: LA-UR-81-1581
  • Report No.: CONF-810523-3
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 6225717
  • Archival Resource Key: ark:/67531/metadc1108172

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 1, 1981

Added to The UNT Digital Library

  • Feb. 22, 2018, 7:45 p.m.

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  • May 22, 2018, 4:29 p.m.

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Amann, J.F. Frontend event selection with an MBD using Q, article, January 1, 1981; New Mexico. (digital.library.unt.edu/ark:/67531/metadc1108172/: accessed October 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.