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Aaron Carta Undergraduate Research Progress, Fall 2013 (view source)
Revision as of 20:40, 23 December 2013
, 20:40, 23 December 2013→Analyzer
==Analyzer==
==Analyzer==
In order to be able to analyze the data collected by the halldtrg5 VME crate, it's necessary to convert the CODA output files to a more useful, user-friendly format. In this case, we have chosen to convert the CODA files to .root files.
The analyzer, written in C++, opens the CODA file, and is currently configured to read from an fADC and F1TDC (see above for descriptions). The CODA file consisting of events from a data run with these two components in operation. The analyzer was initially configured to read from two fADC's and one F1TDC, so this necessitated some reconfiguration. Since, as mentinoned before, I was relatively inexperienced with programming at the beginning of the semester, there was a relatively steep learning curve, as there are few comments and no documentation for the Event Analyzer file that was included with Halldtrg5, and this file was only intended to serve as an example. With the help of Alexander Somov from Jefferson Lab, I was able to make some sense of the analyzer, and use it to create .root files from my test set-up with the function generator.
I encountered a major problem at the end of the semester when I discovered that the set-up that I had been using was not exactly suitable for the testing that Dr. Jones and Alex Barnes had planned to do on the optical fibers. I had to incorporate an Event Recorder into the data acquisition run, by creating an mSQL database for CODA that included an Event Recorder. However, this lead to strange error messages when trying to initialize data runs, which I could resolve only by removing the Event Recorder from the database. This is not a feasible solution, since this prevents usable events from being recorded in the CODA output file. Without events, the Event Analyzer has nothing to export to the .root file. I plan to try to resolve this issue during the winter intersession. I have been speaking with Alex Somov some more regarding this, and hopefully he will be able to shed some light on how to fix this issue.
==ROOT==
==ROOT==