Grain—A Java data analysis system for Total Data Readout

Abstract

Grain is a data analysis framework developed to be used with the novel Total Data Readout data acquisition system. In Total Data Readout all the electronics channels are read out asynchronously in singles mode and each data item is timestamped. Event building and analysis has to be done entirely in the software post-processing the data stream. A flexible and efficient event parser and the accompanying software framework have been written entirely in Java. The design and implementation of the software are discussed along with experiences gained in running real-life experiments.

Level structure above the 17+ isomeric state in Tm8369152

“…The FPGe detectors were used to detect the energies and timing of γ -ray events that had been delayed (E D γ ) with respect to the observed prompt γ rays (E P γ ) at the target position. The GRAIN software package [16] was used to perform offline data sorting and to obtain a three-dimensional E γ -E γ -E γ energy cube as well as two-dimensional E γ -E γ energy versus energy and E γ -T γ energy versus time matrices. Here, T γ corresponds to the time difference between a recoil implantation and a delayed γ -ray detection.…”

Spectroscopy of193Bi

“…All data channels were recorded synchronously using the triggerless total data readout (TDR) [8] data acquisition system. This allowed for using the very selective recoil-decay tagging, isomer-tagging and recoil gating techniques [9].…”

Promptγ-ray spectroscopy of the neutron-rich124Cd

“…Data from each individual Ge crystal were time-stamped and recorded on disk. Event building and data sorting were done offline using the GRAIN software package [11]. An event was defined as a set of three, or more, unsuppressed Ge detectors firing in a time-window of 150 ns.…”