Magic numbers velocity measurement / values for the velocity repeat always

GoogleCodeExporter commented 9 years ago

Velocity measurement shows with small distances magic numbers:

INFO:9165:MuonicWidgets:calculate:193:measured VELOCITY 1.3342564163974109
INFO:9165:MuonicWidgets:calculate:193:measured VELOCITY 0.6671282081987054
INFO:9165:MuonicWidgets:calculate:193:measured VELOCITY 1.3342564163974109
INFO:9165:MuonicWidgets:calculate:193:measured VELOCITY 1.3342564163974109
INFO:9165:MuonicWidgets:calculate:193:measured VELOCITY 0.44475213879913694
INFO:9165:MuonicWidgets:calculate:193:measured VELOCITY 1.3342564163974109
INFO:9165:MuonicWidgets:calculate:193:measured VELOCITY 0.6671282081987054
INFO:9165:MuonicWidgets:calculate:193:measured VELOCITY 1.3342564163974109
INFO:9165:MuonicWidgets:calculate:193:measured VELOCITY 0.44475213879913694
INFO:9165:MuonicWidgets:calculate:193:measured VELOCITY 0.6671282081987054
INFO:9165:MuonicWidgets:calculate:193:measured VELOCITY 0.0019281162086667786
INFO:9165:MuonicWidgets:calculate:193:measured VELOCITY 0.26685128327948215
INFO:9165:MuonicWidgets:calculate:193:measured VELOCITY 1.3342564163974109
INFO:9165:MuonicWidgets:calculate:193:measured VELOCITY 0.14825071293304565
INFO:9165:MuonicWidgets:calculate:193:measured VELOCITY 0.26685128327948215
INFO:9165:MuonicWidgets:calculate:193:measured VELOCITY 1.3342564163974109
INFO:9165:MuonicWidgets:calculate:193:measured VELOCITY 0.3335641040993527
INFO:9165:MuonicWidgets:calculate:193:measured VELOCITY 0.3335641040993527
INFO:9165:MuonicWidgets:calculate:193:measured VELOCITY 1.3342564163974109
INFO:9165:MuonicWidgets:calculate:193:measured VELOCITY 0.44475213879913694
INFO:9165:MuonicWidgets:calculate:193:measured VELOCITY 0.6671282081987054
INFO:9165:MuonicWidgets:calculate:193:measured VELOCITY 0.3335641040993527
INFO:9165:MuonicWidgets:calculate:193:measured VELOCITY 1.3342564163974109

Original issue reported on code.google.com by basho.got on 13 Jun 2013 at 2:35

GoogleCodeExporter commented 9 years ago

What did you enter as distance? If it was 0.5m, this would be exactly our 
resolution of 1.25 ns....

Original comment by achim.st...@gmail.com on 14 Jun 2013 at 11:24

GoogleCodeExporter commented 9 years ago

No, values of 1cm up to 1.5m showed this behaviour, but might be a problem of 
the resolution as discussed.
I put it onto medium priority because it will be checked with the latest 
testruns.

Original comment by basho.got on 14 Jun 2013 at 12:33

GoogleCodeExporter commented 9 years ago

Magic Numbers are due to resolution in dt. Magic numbers / gaps in the velocity 
distribution appear at the same time and are caused by the resolution in the 
tmc timer.

Original comment by basho.got on 30 Jul 2013 at 9:11

Changed state: Fixed

Attachments:

CosMO_MuonVelocity.png

GoogleCodeExporter commented 9 years ago

Plot above generated with toy monte carlo with 1.25 ns time resolution

Original comment by basho.got on 30 Jul 2013 at 10:04

hhsiao2403 / muonic

Magic numbers velocity measurement / values for the velocity repeat always #15