GEO++ Online Detector Characterization System. LIGO-G020382-00-Z GEO++ working group GEO++ working group Cardiff University: Birmingham University Cardiff.

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Presentation transcript:

GEO++ Online Detector Characterization System. LIGO-G Z GEO++ working group GEO++ working group Cardiff University: Birmingham University Cardiff University: Birmingham University Stas Babak Alberto Vecchio R. Balasubramanian Richard Ingley AEI: David Churches AEI: B.S. Sathyaprakash Soumya Mohanty

GEO++: General Review Online software enviroment to monitor and characterize the various channels produced by the interferometer. Online software enviroment to monitor and characterize the various channels produced by the interferometer. The software is written in C++. The software is written in C++. “Online”: “Online”: GEO++ software: GEO++ software:  Handles frame IO  C++ wrapper around mySQL C interface  Digital Signal Processing library: PSD, cross-correlation, filtering in time and frequency domain, filter design, resampling.  pipelines Ruthe Writing frame files (Hannover) Processing data (Hannover) Writing data base (Hannover)

GEO++: General Review  GEO++ pipelines Detector Characterization pipelines Data Analysis pipelines Inspiral/burst pipeline Stochastic (?) maybe Continuous waves, support  GEO++ is freely available from the web and is distributed as a standard GNU package.

GEO++: Detector Characterization The system is designed to be highly extensible. All analysis is carried out by Monitors and users can determine which monitors they wish to execute. The system is designed to be highly extensible. All analysis is carried out by Monitors and users can determine which monitors they wish to execute. The system produces results primarily in the form of database records. The system produces results primarily in the form of database records. Monitors are user defined algorithms which we will run continuously on the the various time series which are recorded at the interferometer. Monitors are user defined algorithms which we will run continuously on the the various time series which are recorded at the interferometer.  Saturation Monitor.  Excess Power Monitor.  Line Tracking Monitor.  Power Tracking Monitor.  Inspiral Monitor.

GEO++ Online Detector Characterization System Monitor Overseer. Oversees execution of monitors MMM Monitor Server Communicates With clients Using MPI Library Distributes Data to clients And inserts Records given By the various clients Database Frame Archive Monitor Overseer. Oversees execution of monitors MM Monitor Overseer. Oversees execution of monitors MMM MPI M

GEO++ Monitors. Saturation Monitor Saturation Monitor  Checks if ADC is getting saturated  Signal > maxVolt – (100% - level%)/100  maxVolt  Level (in %) is specified by user Excess Power Monitor Excess Power Monitor  Search for band limited burst.  Calculates spectrograms of windowed overlapped subsegments. Calculates power in limited bands (bandwidth is specified by user). Compares power in each band with median over all subsegments.  Trigger: power/( median power )  threshold or  1/threshold

GEO++ Monitors. Power Tracking Monitor Power Tracking Monitor  Tracks long time scale changes in power spectrum of a noise.  Calculates PSD (or uses PSD calculated by other monitor) of a data segment. Computes power in limited (overlapped) bands (bandwidth specified by user). Compares with corresponding power of a previous segment.  Trigger: power/( power prev.)  threshold or  1/threshold,or writes in database power within each limited band for every n-th data segment.  Example of a table: Power Tacking Monitor database table Channel_Name, GPStime, start_frequency, amplitude, process_id, pipeline_id, pipeline_name

GEO++ Monitors. Power Line Tracker / Line tracker. Power Line Tracker / Line tracker.  Tracks power lines (harmonics) / lines with known frequencies taken from line database (Uta Weiland).  Calculates PSD (or uses PSD calculated by other monitor). Adjust frequency of lines. Determines amplitude of lines. Compares with result obtained from previous data set. Records to database if frequency drift exceeds (freq.)threshold and if Amplitude/( Amplitude prev. )  (line)threshold  1/(line)threshold or writes to data base amplitude and frequency of lines estimated from every n-th data segment. or writes to data base amplitude and frequency of lines estimated from every n-th data segment.

GEO++ Monitors. Inspiral Monitor. Inspiral Monitor.  Checks the sensitivity of h(t) channel to the inspiral signal from BH-BH (10-10)M , BH-NS (10-1.4)M , NS-NS ( )M  systems.  Uses stationary phase approximation. Incorporates upper frequency cut-off at LSO. SNR specified by user. Estimates an effective distance to those systems. Line Auto Detection Monitor Line Auto Detection Monitor  Not ready yet as a GEO++ monitor (matlab code).  Automated detection of lines and recording (frequency, amplitude, width) to line database.

GEO++ Monitors. Example of pipeline Monitor Overseer Excess PowerPower Tracker Power Line Tracker Store PSD Retrieve PSD Retrieve PSD Monitor can change data and pass it to the next monitor via Store-Retrieve commands.

GEO++ Monitors. Example of a job file

GEO++ Monitors. jobFile singleDCPipeline database(geopp) hostname(local) user(geopp) password(geopp) comment(this is a test) basedir(/frames/frames) interval( ) job(16 0) monitor(test) SaturationMon(5) channels(SEI_NBC_SEIS-Y) monitor(test) ExcessPowerMon( ) channels(LSC_MID_EP-P) store()

GEO++ : future plans. Minimum of man-power in development, more effort in creating new monitors. Minimum of man-power in development, more effort in creating new monitors. Time-frequency analysis Time-frequency analysis Improve algorithms of existing monitors Improve algorithms of existing monitors Other monitors as a request/interaction from/with experimentalists. Other monitors as a request/interaction from/with experimentalists.