{"action":"created","issue":{"url":"https://api.github.com/repos/GRIFFINCollaboration/GRSISort/issues/775","repository_url":"https://api.github.com/repos/GRIFFINCollaboration/GRSISort","labels_url":"https://api.github.com/repos/GRIFFINCollaboration/GRSISort/issues/775/labels{/name}","comments_url":"https://api.github.com/repos/GRIFFINCollaboration/GRSISort/issues/775/comments","events_url":"https://api.github.com/repos/GRIFFINCollaboration/GRSISort/issues/775/events","html_url":"https://github.com/GRIFFINCollaboration/GRSISort/issues/775","id":180705195,"number":775,"title":"Pileup Timestamps?","user":{"login":"r3dunlop","id":5428160,"avatar_url":"https://avatars.githubusercontent.com/u/5428160?v=3","gravatar_id":"","url":"https://api.github.com/users/r3dunlop","html_url":"https://github.com/r3dunlop","followers_url":"https://api.github.com/users/r3dunlop/followers","following_url":"https://api.github.com/users/r3dunlop/following{/other_user}","gists_url":"https://api.github.com/users/r3dunlop/gists{/gist_id}","starred_url":"https://api.github.com/users/r3dunlop/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/r3dunlop/subscriptions","organizations_url":"https://api.github.com/users/r3dunlop/orgs","repos_url":"https://api.github.com/users/r3dunlop/repos","events_url":"https://api.github.com/users/r3dunlop/events{/privacy}","received_events_url":"https://api.github.com/users/r3dunlop/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/GRIFFINCollaboration/GRSISort/labels/Griffin","name":"Griffin","color":"eb6420"},{"url":"https://api.github.com/repos/GRIFFINCollaboration/GRSISort/labels/question","name":"question","color":"cc317c"}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":9,"created_at":"2016-10-03T18:01:04Z","updated_at":"2016-10-07T22:32:37Z","closed_at":null,"body":"I've noticed something interesting. I'm not sure if this is a bug in our code, the firmware, or is expected, but it seems like our piled-up hits are getting unexpected (to me) timestamps. I have looked at the time differences of gamma-rays > 1300 keV with all other gamma rays. With no other conditions put on this, I see the following time spectrum:\r\n\r\n<img width=\"662\" alt=\"screenshot 2016-10-03 13 55 18\" src=\"https://cloud.githubusercontent.com/assets/5428160/19047730/09a1211a-8971-11e6-94b9-95c5416ee836.png\">\r\n\r\nwith the x value being the time difference in clock-ticks and the y value being the energy of the \"other\" gamma ray. Now, if I put a condition on both gamma rays that they both must have a KValue of 700 (standard for this experiment), I get the following spectrum.\r\n\r\n<img width=\"662\" alt=\"screenshot 2016-10-03 13 51 25\" src=\"https://cloud.githubusercontent.com/assets/5428160/19047754/253f2f16-8971-11e6-9b13-147bed706c09.png\">\r\n\r\nnotice that the low energy blob at 800 ns disappears. \r\n\r\n- @AdamGarnsworthy @MikeBowry Is it possible that we are writing separate LED times for pileup hits?\r\n \r\n\r\n"},"comment":{"url":"https://api.github.com/repos/GRIFFINCollaboration/GRSISort/issues/comments/252376780","html_url":"https://github.com/GRIFFINCollaboration/GRSISort/issues/775#issuecomment-252376780","issue_url":"https://api.github.com/repos/GRIFFINCollaboration/GRSISort/issues/775","id":252376780,"user":{"login":"MikeBowry","id":14794662,"avatar_url":"https://avatars.githubusercontent.com/u/14794662?v=3","gravatar_id":"","url":"https://api.github.com/users/MikeBowry","html_url":"https://github.com/MikeBowry","followers_url":"https://api.github.com/users/MikeBowry/followers","following_url":"https://api.github.com/users/MikeBowry/following{/other_user}","gists_url":"https://api.github.com/users/MikeBowry/gists{/gist_id}","starred_url":"https://api.github.com/users/MikeBowry/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/MikeBowry/subscriptions","organizations_url":"https://api.github.com/users/MikeBowry/orgs","repos_url":"https://api.github.com/users/MikeBowry/repos","events_url":"https://api.github.com/users/MikeBowry/events{/privacy}","received_events_url":"https://api.github.com/users/MikeBowry/received_events","type":"User","site_admin":false},"created_at":"2016-10-07T22:32:37Z","updated_at":"2016-10-07T22:32:37Z","body":"What run was this, just out of interest? I am not sure if the pile-up counter is working in the new (Revision 1) firmware yet. We hope to test this today."}}
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