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The GREAT triggerless total data readout method

Lazarus, IH, Appelbe, DE, Butler, PA, Coleman-Smith, PJ, Cresswell, JR, Freeman, SJ, Herzberg, RD, Hibbert, I, Joss, DT, Letts, SC , Page, RD, Pucknell, VFE, Regan, PH, Sampson, J, Simpson, J, Thornhill, J and Wadsworth, R (2000) The GREAT triggerless total data readout method IEEE Nuclear Science Symposium and Medical Imaging Conference, 2.

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Recoil Decay Tagging (RDT) is a very powerful method for the spectroscopy of exotic nuclei. RDT is a delayed coincidence technique between detectors usually at the target position and at the focal plane of a spectrometer. Such measurements are often limited by dead time. This paper describes a novel triggerless data acquisition method which is being developed for the Gamma Recoil Electron Alpha Tagging (GREAT) spectrometer that overcomes this limitation by virtually eliminating dead time. Our solution is a Total Data Readout (TDR) method where all channels run independently and are associated in software to reconstruct events. The TDR method allows all the data from both target position and focal plane to be collected with practically no dead time losses. Each data word is associated with a timestamp generated from a global 100MHz clock. Events are then reconstructed in real time in the event builder using temporal and spatial associations defined by the physics of the experiment.

Item Type: Article
Divisions : Surrey research (other units)
Authors :
Lazarus, IH
Appelbe, DE
Butler, PA
Coleman-Smith, PJ
Cresswell, JR
Freeman, SJ
Herzberg, RD
Hibbert, I
Joss, DT
Letts, SC
Page, RD
Pucknell, VFE
Sampson, J
Simpson, J
Thornhill, J
Wadsworth, R
Date : 1 December 2000
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 12:33
Last Modified : 24 Jan 2020 22:27

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