{"action":"closed","issue":{"url":"https://api.github.com/repos/psi46/pxar/issues/195","labels_url":"https://api.github.com/repos/psi46/pxar/issues/195/labels{/name}","comments_url":"https://api.github.com/repos/psi46/pxar/issues/195/comments","events_url":"https://api.github.com/repos/psi46/pxar/issues/195/events","html_url":"https://github.com/psi46/pxar/issues/195","id":38168914,"number":195,"title":"Spiky pulse height distribution using roc2.1-test0-v1.2.1","user":{"login":"jpoehlsen","id":7328008,"avatar_url":"https://avatars.githubusercontent.com/u/7328008?v=3","gravatar_id":"","url":"https://api.github.com/users/jpoehlsen","html_url":"https://github.com/jpoehlsen","followers_url":"https://api.github.com/users/jpoehlsen/followers","following_url":"https://api.github.com/users/jpoehlsen/following{/other_user}","gists_url":"https://api.github.com/users/jpoehlsen/gists{/gist_id}","starred_url":"https://api.github.com/users/jpoehlsen/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jpoehlsen/subscriptions","organizations_url":"https://api.github.com/users/jpoehlsen/orgs","repos_url":"https://api.github.com/users/jpoehlsen/repos","events_url":"https://api.github.com/users/jpoehlsen/events{/privacy}","received_events_url":"https://api.github.com/users/jpoehlsen/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":8,"created_at":"2014-07-18T11:39:42Z","updated_at":"2015-01-13T07:49:12Z","closed_at":"2015-01-13T07:49:12Z","body":"When trying to take data with x-rays using this release (roc2.1-test0-v1.2.1, FLASH 2.22) which was recommended for the cross-calibration exercise, I obtain a very spiky pulse height distribution.  I did not see this with the previous release (roc2.1-test0-v1.2.0) and I don't see it with the HEAD version (FLASH 3.3).\r\n\r\nMy guess is that the problem is somewhere in the PH calibration, since using the calibration files from this release with the HEAD also produces the spiky PH dist.\r\n\r\nI've attached here the PH distributions for one single ROC module using this release (Ag_v121.png) and the HEAD from 17.07. (Ag_HEAD.png).  All conditions are the same except for the pXar and FLASH files (temperature = +17 C, measurement time 5 min, trimmed to 40, Ag target).\r\n\r\nroc2.1-test0-v1.2.1\r\n![ag_v121](https://cloud.githubusercontent.com/assets/7328008/3625662/d5b6849a-0e6f-11e4-986d-e163b38c0f07.png)\r\n\r\nHEAD\r\n![ag_head](https://cloud.githubusercontent.com/assets/7328008/3625664/d87b2d70-0e6f-11e4-9852-e0198cf6ab7c.png)\r\n\r\nI've observed this for 3 different single ROC modules, including the 2 already tested by ETH for the cross-calibration exercise.  \r\n\r\nOS: Ubuntu 12.04\r\n"}}