Class ModeAHDC

java.lang.Object

org.jlab.detector.pulse.HipoExtractor

org.jlab.detector.pulse.ModeAHDC

All Implemented Interfaces:

IExtractor

public class ModeAHDC
extends HipoExtractor

A new extraction method dedicated to the AHDC signal waveform Some blocks of code are inspired by MVTFitter.java and Bonus12 (`createBonusBank()`) To do list: - read pedestal from the DB when a baseline cannot be computed - change the definition of ADC to be the max of the peak? - fit waveforms to define arrival time (and charge)

Author:

ftouchte, pilleux

Constructor Summary

Constructors

Constructor	Description
ModeAHDC()

Method Summary

Modifier and Type	Method	Description
void	assignInvalidType()	This method assigns an invalid type (-1) to the waveform
void	assignValidType(int type)	This method assigns a new type to the waveform by checking if another more restrictive type had already been assigned
void	baselineComputation()	This method computes the waveform baseline from the average of the first few samples
void	baselineSlope()	This method checks if the wf starts with a flat baseline
int	computeTimeUsingConstantFractionDiscriminator()	This methods extracts a time using the Constant Fraction Discriminator (CFD) algorithm as described in https://commons.wikimedia.org/wiki/File:CFD_Diagram1.jpg for example
List<Pulse>	extract(NamedEntry pars, int id, long timestamp, long time_ZS, short... samples)	This method extracts relevant information from the waveform and builds a pulse from it
void	update(int n, IndexedTable it, DataEvent event, String wfBankName, String adcBankName)	This could be overriden, e.g., for non-standard ADC banks.
protected void	update(int n, IndexedTable it, org.jlab.jnp.hipo4.data.Bank wfBank, org.jlab.jnp.hipo4.data.Bank adcBank)	This could be overriden, e.g., for non-standard ADC banks.
int	waveformADCProcessing()	This method subtracts the baseline, computes the max ADC and corresponding time and the integral of the wf
int	waveformCFAprocessing()	This method computes the leading edge time and time over threshold over a constant fraction of the peak value

Methods inherited from class org.jlab.detector.pulse.HipoExtractor

copyIndices, copyIndices, getIndices, getIndices, getPulses, getPulses, update

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ModeAHDC

public ModeAHDC()

Method Details

baselineSlope

public void baselineSlope()

This method checks if the wf starts with a flat baseline

baselineComputation

public void baselineComputation()

This method computes the waveform baseline from the average of the first few samples

assignValidType

public void assignValidType(int type)

This method assigns a new type to the waveform by checking if another more restrictive type had already been assigned

Parameters:

type - an int that is the new wf type to be applied

assignInvalidType

public void assignInvalidType()

This method assigns an invalid type (-1) to the waveform

waveformADCProcessing

public int waveformADCProcessing()

This method subtracts the baseline, computes the max ADC and corresponding time and the integral of the wf

Returns:

an int for status

waveformCFAprocessing

public int waveformCFAprocessing()

This method computes the leading edge time and time over threshold over a constant fraction of the peak value

Returns:

an int for status

computeTimeUsingConstantFractionDiscriminator

public int computeTimeUsingConstantFractionDiscriminator()

This methods extracts a time using the Constant Fraction Discriminator (CFD) algorithm as described in https://commons.wikimedia.org/wiki/File:CFD_Diagram1.jpg for example

Returns:

an int for status

extract

public List<Pulse> extract(NamedEntry pars,
 int id,
 long timestamp,
 long time_ZS,
 short... samples)

This method extracts relevant information from the waveform and builds a pulse from it

Parameters:

pars - CCDB row

id - link to row in source bank

timestamp - ...

time_ZS - time_ZS time bin of the first channel of the AHDC pulse (linked to zero suppression; if ZS=0, time_ZS == 0)

samples - ADC samples

update

public void update(int n,
 IndexedTable it,
 DataEvent event,
 String wfBankName,
 String adcBankName)

Description copied from class: HipoExtractor

This could be overriden, e.g., for non-standard ADC banks.

Overrides:

update in class HipoExtractor

Parameters:

n - number of samples in readout

it - CCDB table containing extraction initialization parameters

event - the event to modify

wfBankName - name of the input waveform bank

adcBankName - name of the output ADC bank

update

protected void update(int n,
 IndexedTable it,
 org.jlab.jnp.hipo4.data.Bank wfBank,
 org.jlab.jnp.hipo4.data.Bank adcBank)

Description copied from class: HipoExtractor

This could be overriden, e.g., for non-standard ADC banks.

Overrides:

update in class HipoExtractor

Parameters:

n - number of samples in readout

it - CCDB table containing extraction initialization parameters

wfBank - input waveform bank

adcBank - output ADC bank