Updates and Results
Talks and Posters
Advice
Ideas
Important Figures
Write-Ups
Outreach
How-To
Funding Opportunities
GENETIS
Important Plots, Tables, and Measurements
Draft saved at 00:00:00
Fields marked with
*
are required
Entry time:
Wed Mar 15 17:18:51 2017
Author
*
:
Type
*
:
- please select -
Lab Measurement
Modeling
Analysis
Other
Category
*
:
- please select -
General
Hardware
Analysis
Simulation
Theory
Outreach
Service
Other
Subject:
Project:
- please select -
ARA
ANITA
EVA
BuckArray
Other
<p>Hello! Back to ARA analysis.</p> <p>Whenever I attempt to decide if a signal was an incoming plane wave, I compute the planarity of the event by summing cyclically the time-differences in adjacent channels that form a polygon. For square polygons, this looks is like summing the time-difference between channels A and B, B and C, C and D, with D and A. This sum should be zero for a plane wave, and a normal distribution for thermal noise. I identify 12 faces within the cubical ARA detectors. Using the Miller cubic crystal notation, the planes I use are the following: (001) (010) (100) plus opposites, (110) (101) (011) plus opposites. For the first set, opposite means the other side of the cube, and for the second set, opposite means (T10) (T01) (0T1).</p> <p>When a calibration pulser hits these surfaces, the wave should create a pulse waveform in each channel. Computing the cyclic sum (planarity) for each of the twelve polygons, I usually get a number close to zero. This must be a precision measurement, however. We know where the calibration pulsers are, and we know where the channels are. Thus, we can make a prediction for the timing corrections to each channel pair. Each offset to the time-difference in a channel pair may be introduced by my analysis techniques, or some unknown systematic error in the detector.</p> <p>My analysis code has a mode in which I can run over just tagged calibration pulses, in runs where there are a minimum number of tagged calibration pulse events. I first check that there are at least 100 events in a run, and then I compute the mean and rms of 100 timing offsets for every channel pair. The graphs below show the timing offsets versus time. By applying these corrections to the data, calibration pulse events have planarities centered on zero, and this match improves with increasing amplitude.</p> <p>Notice two things about these graphs: 1) Sometimes the data goes haywire, and that is because there are either thermal events tagged as calibration pulses, or a channel died. 2) For good data, that has small errors and small values (<10 ns), there seem to be linear trends that show drift in the station timing. This drift cannot be introduced by my analysis code.</p> <p>The graphs are for ARA2 data, and ARA3 plots are coming.</p>
Encoding
:
HTML
ELCode
plain
Suppress Email notification
Resubmit as new entry
Attachment 1:
ARA02_Face0Pair0.pdf
Attachment 2:
ARA02_Face0Pair1.pdf
Attachment 3:
ARA02_Face0Pair2.pdf
Attachment 4:
ARA02_Face0Pair3.pdf
Attachment 5:
ARA02_Face1Pair0.pdf
Attachment 6:
ARA02_Face1Pair1.pdf
Attachment 7:
ARA02_Face1Pair2.pdf
Attachment 8:
ARA02_Face1Pair3.pdf
Attachment 9:
ARA02_Face2Pair0.pdf
Attachment 10:
ARA02_Face2Pair1.pdf
Attachment 11:
ARA02_Face2Pair2.pdf
Attachment 12:
ARA02_Face2Pair3.pdf
Attachment 13:
ARA02_Face3Pair0.pdf
Attachment 14:
ARA02_Face3Pair1.pdf
Attachment 15:
ARA02_Face3Pair2.pdf
Attachment 16:
ARA02_Face3Pair3.pdf
Attachment 17:
ARA02_Face4Pair0.pdf
Attachment 18:
ARA02_Face4Pair1.pdf
Attachment 19:
ARA02_Face4Pair2.pdf
Attachment 20:
ARA02_Face4Pair3.pdf
Attachment 21:
ARA02_Face5Pair0.pdf
Attachment 22:
ARA02_Face5Pair1.pdf
Attachment 23:
ARA02_Face5Pair2.pdf
Attachment 24:
ARA02_Face5Pair3.pdf
Attachment 25:
ARA02_Face6Pair0.pdf
Attachment 26:
ARA02_Face6Pair1.pdf
Attachment 27:
ARA02_Face6Pair2.pdf
Attachment 28:
ARA02_Face6Pair3.pdf
Attachment 29:
ARA02_Face7Pair0.pdf
Attachment 30:
ARA02_Face7Pair1.pdf
Attachment 31:
ARA02_Face7Pair2.pdf
Attachment 32:
ARA02_Face7Pair3.pdf
Attachment 33:
ARA02_Face8Pair0.pdf
Attachment 34:
ARA02_Face8Pair1.pdf
Attachment 35:
ARA02_Face8Pair2.pdf
Attachment 36:
ARA02_Face8Pair3.pdf
Attachment 37:
ARA02_Face9Pair0.pdf
Attachment 38:
ARA02_Face9Pair1.pdf
Attachment 39:
ARA02_Face9Pair2.pdf
Attachment 40:
ARA02_Face9Pair3.pdf
Attachment 41:
ARA02_Face10Pair0.pdf
Attachment 42:
ARA02_Face10Pair1.pdf
Attachment 43:
ARA02_Face10Pair2.pdf
Attachment 44:
ARA02_Face10Pair3.pdf
Attachment 45:
ARA02_Face11Pair0.pdf
Attachment 46:
ARA02_Face11Pair1.pdf
Attachment 47:
ARA02_Face11Pair2.pdf
Attachment 48:
ARA02_Face11Pair3.pdf
Attachment 49:
Drop attachments here...
Draft saved at 00:00:00
ELOG V3.1.5-fc6679b