Gammasphere

Lee, I‐Yang

doi:10.1007/978-1-4615-3684-0_15

Cited by 3 publications

References 7 publications

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Heat Transfer and Inclusion Behavior in Continuous Casting Tundishes

Zhu

Yong-lai

Zheng

et al. 2006

Dev. Chem. Eng. Mineral Process.

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In this study, a mathematical model describing the three-dimensional turbulent flow, heat transfir and inclusion behavior in continuous casting tundishes was developed. Numerical calculations were performed to study the characteristics of flow, heat transfer and inclusion behavior in a one-strand tundish withlwithout flow control. The results show that it is necessary to employ flow control devices in order to improve the efectiveness of removal of nonmetallic inclusions in the tundish. Without flow control, the hot melt ascends and cooled melt descends and then recirculates back to

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Heat Transfer and Inclusion Behavior in Continuous Casting Tundishes

Zhu

Yong-lai

Zheng

et al. 2006

Dev. Chem. Eng. Mineral Process.

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A digital data acquisition system for the detectors at gammasphere

Anderson

David

Alcorta

et al. 2012

2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record (NSS/MIC)

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A new data acquisition system for experiments using the Gammasphere detector array and associated detectors including the double-sided silicon strip detector (DSSD) is under development. Waveform digitization and triggering hardware identical to that developed for GRETINA has been procured and interfaced to the both the existing Gammasphere and DSSD detectors to provide significantly increased data throughput and increased event rates. A new parasitic signal connection and cable plant provides the ability to simultaneously measure the same events using both the old and new systems. A triggering interface module has been manufactured that connects the Gammasphere trigger and clock to the new system. A second digital data acquisition system has been attached to the DSSD detector located downstream from Gammasphere. The trigger systems of Gammasphere, Digital Gammasphere and Digital DSSD have successfully synchronized the clocks of all three data acquisition systems demonstrating timestamp correlation across multiple detector systems. New firmware for the digitizer modules specific to the signals provided by the Gammasphere detector has been developed and is currently being tested in situ to directly compare the energy resolution of the two data acquisition systems. We describe the system as implemented and show test results to date, where significantly faster event processing rates have been obtained with nearly equivalent energy resolution.

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Digital gamma-ray tracking algorithms in segmented germanium detectors

Pearson

Dobón

Regan

et al. 2002

IEEE Trans. Nucl. Sci.

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A gamma-ray tracking algorithm has been implemented and tested, using simulated data, for gamma rays with energies between 0.1 and 2 MeV, and its performance evaluated for a 90-mm-long, 60-mm-diameter, cylindrical, 36 (6 6) segment detector. The performance of the algorithm in two areas was determined: Compton suppression and Doppler shift correction. It was found that for gamma rays of energies around 1 MeV, a ratio of photopeak counts to total counts of 2 : 3 could be obtained using the tracking algorithm, with only a 2% reduction in detection efficiency, compared to the untracked data. Approximately 80% of first interaction points could be correctly identified, enabling a good Doppler shift correction. A detector of the type simulated has recently been delivered, together with a compactPCI digital data acquisition system comprising 36 12-bit, 40-MHz flash ADCs, and 6 200-MHz DSPs. Some initial data has been recorded using this system, and the performance of the tracking algorithm on this real data is comparable to its performance on simulated data.

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Gammasphere

Cited by 3 publications

References 7 publications

Heat Transfer and Inclusion Behavior in Continuous Casting Tundishes

Heat Transfer and Inclusion Behavior in Continuous Casting Tundishes

A digital data acquisition system for the detectors at gammasphere

Digital gamma-ray tracking algorithms in segmented germanium detectors

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