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Quantum Diaries

Why we need an Event Viewer

30 Jun 2014, 22:44 UTC
Why we need an Event Viewer
(200 words excerpt, click title or image to see full post)

There’s a software tool I use almost every day, for almost any work situation. It’s good for designing event selections, for brainstorming about systematic errors, and for mesmerizing kids at outreach events. It’s good anytime you want to build intuition about the detector. It’s our event viewer. I wrote a bit about how I use our event viewer, and then interviewed the code architect Steve Jackson about his experience of putting it together.

The IceCube detector is buried in the glacier under the South Pole. The signals can only be read out electronically; there’s no way to reach the detector modules after the ice freezes around them. In designing the detector, we carefully considered what readout we would need to describe what happens in the ice, and now we’re at the stage of interpreting that data. A signal from one detector module might tell us the time, amplitude, and duration of light arriving at that detector, and we put those together into a picture of the detector. From five thousand points of light (or darkness), we have to answer: where did this particle come from? Does the random detector noise act the way we think it acts? Is the disruption ...

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