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electronics [2013/10/31 09:42] pereira |
electronics [2013/11/19 07:30] pereira |
The trigger schematic is shown on the Graphical User Interface (GUI) displayed in the figure below. | The trigger schematic is shown on the Graphical User Interface (GUI) displayed in the figure below. |
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{{:wiki:800px-TriggerGUI.png?700|Layout of the S800}} | {{:wiki:800px-TriggerGUI.png?900|Layout of the S800}} |
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The two main trigger sources are labeled "S800" and "Secondary" in the GUI. Each source is routed to a gate and delay generator before forming a coincidence in the following AND gate. The AND signal is then widened before being ANDed with the delayed S800 source signal. The purpose of the second AND gate is to reset the timing of the coincidence to the S800 timing. This is necessary in case the secondary detector has a slow timing and large jitter (Germanium detectors for instance). Single triggers from each trigger source are also available in a second branch, after going through a delay generator followed by a downscaler (used to take a reduced number of events from the trigger sources). Note that each gate and delay generator can be bypassed. | The two main trigger sources are labeled "S800" and "Secondary" in the GUI. Each source is routed to a gate and delay generator before forming a coincidence in the following AND gate. The AND signal is then widened before being ANDed with the delayed S800 source signal. The purpose of the second AND gate is to reset the timing of the coincidence to the S800 timing. This is necessary in case the secondary detector has a slow timing and large jitter (Germanium detectors for instance). Single triggers from each trigger source are also available in a second branch, after going through a delay generator followed by a downscaler (used to take a reduced number of events from the trigger sources). Note that each gate and delay generator can be bypassed. |