tracking::reco::TrackerPedestals Class Reference

Per-channel tracker pedestal conditions: the per-sample pedestal mean and RMS noise for every silicon-strip readout channel. More...

#include <TrackerPedestals.h>

Classes
struct	Channel
	Per-channel pedestal mean and RMS noise for the three APV25 samples. More...

Public Member Functions
void	add (uint8_t feb, uint8_t hybrid, uint8_t apv, uint8_t channel, const Channel &ped)
	Insert the pedestal for one electronics channel.
const Channel *	find (uint8_t feb, uint8_t hybrid, uint8_t apv, uint8_t channel) const
	Look up a channel; returns nullptr if the channel is not in the table.
float	noise (uint8_t feb, uint8_t hybrid, uint8_t apv, uint8_t channel) const
	Scalar per-channel noise (mean of the three per-sample noises); 0 if the channel is absent.
std::size_t	size () const
	Number of channels in the table.
Public Member Functions inherited from framework::ConditionsObject
	ConditionsObject (const std::string &name)
	Class constructor.
virtual	~ConditionsObject ()
	Destructor.
std::string	getName () const
	Get the name of this object.

Static Public Attributes
static const std::string	CONDITIONS_NAME = "TrackerPedestals"
	Name of the conditions object (must match the python registration).

Private Attributes
std::unordered_map< uint32_t, Channel >	channels_

Detailed Description

Per-channel tracker pedestal conditions: the per-sample pedestal mean and RMS noise for every silicon-strip readout channel.

This is a conditions object (a service), not event data: pedestals and noise are calibration constants delivered on demand via getCondition<>(), the same way Ecal/Hcal deliver their HGCROC pedestals/gains. Consumers (PedestalSubtractor, SiStripWaveformBuilder, ...) look up values by electronics address; nothing is persisted into the hit objects.

The object is filled by TrackerPedestalProvider, which reads the pedestal file produced by PedestalCalculator.

Definition at line 28 of file TrackerPedestals.h.

Constructor & Destructor Documentation

TrackerPedestals()

tracking::reco::TrackerPedestals::TrackerPedestals ( )

inline

Definition at line 39 of file TrackerPedestals.h.

: framework::ConditionsObject(CONDITIONS_NAME) {}

Member Function Documentation

add()

void tracking::reco::TrackerPedestals::add ( uint8_t feb, uint8_t hybrid, uint8_t apv, uint8_t channel, const Channel & ped )

inline

Insert the pedestal for one electronics channel.

Definition at line 42 of file TrackerPedestals.h.

                               {
    channels_[channelmap::channelId(feb, hybrid, apv, channel)] = ped;
  }

References tracking::reco::channelmap::channelId().

find()

const Channel * tracking::reco::TrackerPedestals::find ( uint8_t feb, uint8_t hybrid, uint8_t apv, uint8_t channel ) const

inline

Look up a channel; returns nullptr if the channel is not in the table.

Definition at line 48 of file TrackerPedestals.h.

                                             {
    auto it = channels_.find(channelmap::channelId(feb, hybrid, apv, channel));
    return it == channels_.end() ? nullptr : &it->second;
  }

References tracking::reco::channelmap::channelId().

Referenced by noise().

noise()

float tracking::reco::TrackerPedestals::noise ( uint8_t feb, uint8_t hybrid, uint8_t apv, uint8_t channel ) const

inline

Scalar per-channel noise (mean of the three per-sample noises); 0 if the channel is absent.

Definition at line 56 of file TrackerPedestals.h.

                                                                               {
    const Channel* c = find(feb, hybrid, apv, channel);
    if (!c) return 0.f;
    const float sum =
        std::accumulate(c->noise_.begin(), c->noise_.end(), 0.f);
    return sum / static_cast<float>(c->noise_.size());
  }

References find().

size()

std::size_t tracking::reco::TrackerPedestals::size ( ) const

inline

Number of channels in the table.

Definition at line 65 of file TrackerPedestals.h.

{ return channels_.size(); }

Member Data Documentation

channels_

std::unordered_map<uint32_t, Channel> tracking::reco::TrackerPedestals::channels_

private

Definition at line 68 of file TrackerPedestals.h.

CONDITIONS_NAME

const std::string tracking::reco::TrackerPedestals::CONDITIONS_NAME = "TrackerPedestals"

static

Name of the conditions object (must match the python registration).

Definition at line 31 of file TrackerPedestals.h.

Referenced by tracking::reco::PedestalSubtractor::produce(), and tracking::reco::SiStripWaveformBuilder::produce().

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The documentation for this class was generated from the following files:

• Tracking/include/Tracking/Reco/TrackerPedestals.h
• Tracking/src/Tracking/Reco/TrackerPedestalProvider.cxx