o2::trd::constants Namespace Reference

Variables
constexpr int	NSECTOR = 18
	the number of sectors
constexpr int	NSTACK = 5
	the number of stacks per sector
constexpr int	NLAYER = 6
	the number of layers
constexpr int	NCHAMBERPERSEC = 30
	the number of chambers per sector
constexpr int	NHCPERSEC = 60
	the number of half-chambers per sector
constexpr int	MAXCHAMBER = 540
	the maximum number of installed chambers
constexpr int	MAXHALFCHAMBER = 1080
	the maximum number of installed half-chambers
constexpr int	NCHAMBER = 521
	the number of chambers actually installed
constexpr int	NHALFCRU = 72
	the number of half cru (link bundles)
constexpr int	NLINKSPERHALFCRU = 15
	the number of links per half cru or cru end point.
constexpr int	NLINKSPERCRU = 30
	the number of links per CRU (two CRUs serve one supermodule)
constexpr int	NCRU = 36
	the number of CRU we have
constexpr int	NFLP = 12
	the number of FLP we have.
constexpr int	NCRUPERFLP = 3
	the number of CRU per FLP
constexpr int	TRDLINKID = 15
	hard coded link id, specific to TRD
constexpr int	NCOLUMN = 144
	the number of pad columns for each chamber
constexpr int	NROWC0 = 12
	the number of pad rows for chambers of type C0 (installed in stack 2)
constexpr int	NROWC1 = 16
	the number of pad rows for chambers of type C1 (installed in stacks 0, 1, 3 and 4)
constexpr int	FIRSTROW [NSTACK] = {0, 16, 32, 44, 60}
	first pad row for each stack
constexpr int	NMCMROB = 16
	the number of MCMs per ROB
constexpr int	NMCMHCMAX = 64
	the maximum number of MCMs for one half chamber (C1 type)
constexpr int	NMCMROBINROW = 4
	the number of MCMs per ROB in row direction
constexpr int	NMCMROBINCOL = 4
	the number of MCMs per ROB in column direction
constexpr int	NROBC0 = 6
	the number of ROBs per C0 chamber
constexpr int	NROBC1 = 8
	the number of ROBs per C1 chamber
constexpr int	NADCMCM = 21
	the number of ADC channels per MCM
constexpr int	NCOLMCM = 18
	the number of pads per MCM
constexpr int	NCHANNELSPERROW = NMCMROBINCOL * 2 * NADCMCM
	the number of readout channels per pad row
constexpr int	NCHANNELSC0 = NROWC0 * NCHANNELSPERROW
	the number of readout channels per C0 chamber
constexpr int	NCHANNELSC1 = NROWC1 * NCHANNELSPERROW
	the number of readout channels per C1 chamber
constexpr int	NCHANNELSTOTAL = NSECTOR * NLAYER * (NSTACK - 1) * NCHANNELSC1 + NSECTOR * NLAYER * NCHANNELSC0
	the total number of readout channels for TRD
constexpr int	NCHANNELSPERSECTOR = NCHANNELSTOTAL / NSECTOR
	then number of readout channels per sector
constexpr int	NCHANNELSPERLAYER = NCHANNELSPERSECTOR / NLAYER
	then number of readout channels per layer
constexpr int	NCPU = 4
	the number of CPUs inside the TRAP chip
constexpr int	NCHARGES = 3
	the number of charges per tracklet (Q0/1/2)
constexpr int	NBITSTRKLPOS = 11
	number of bits for position in tracklet64 word
constexpr int	NBITSTRKLSLOPE = 8
	number of bits for slope in tracklet64 word
constexpr int	ADDBITSHIFTSLOPE = 1 << 3
	in the TRAP the slope is shifted by 3 additional bits compared to the position
constexpr int	PADGRANULARITYTRKLPOS = 40
	tracklet position is stored in units of 1/40 pad
constexpr int	PADGRANULARITYTRKLSLOPE = 128
	tracklet deflection is stored in units of 1/128 pad per time bin
constexpr float	GRANULARITYTRKLPOS = 1.f / PADGRANULARITYTRKLPOS
	granularity of position in tracklet64 word in pad-widths
constexpr float	GRANULARITYTRKLSLOPE = 1.f / PADGRANULARITYTRKLSLOPE
	granularity of slope in tracklet64 word in pads/timebin
constexpr int	ADCBASELINE = 10
	baseline in ADC units
constexpr int	TIMEBINS = 30
	the number of time bins
constexpr float	MAXIMPACTANGLE = 25.f
	the maximum impact angle for tracks relative to the TRD detector plane to be considered for vDrift and ExB calibration
constexpr int	NBINSANGLEDIFF = 25
	the number of bins for the track angle used for the vDrift and ExB calibration based on the tracking
constexpr double	VDRIFTDEFAULT = 1.546
	default value for vDrift
constexpr double	EXBDEFAULT = 0.0
	default value for LorentzAngle
constexpr int	NBINSGAINCALIB = 320
	number of bins in the charge (Q0+Q1+Q2) histogram for gain calibration
constexpr float	MPVDEDXDEFAULT = 42.
	default Most Probable Value of TRD dEdx
constexpr float	T0DEFAULT = 1.2
	default value for t0
constexpr int	HBFBUFFERMAX = 1048576
	max buffer size for data read from a half cru, (all events)
constexpr unsigned int	CRUPADDING32 = 0xeeeeeeee
	padding word used in the cru.
constexpr int	CHANNELNRNOTRKLT = 23
	this marks channels in the ADC mask which don't contribute to a tracklet
constexpr int	NOTRACKLETFIT = 31
	this value is assigned to the fit pointer in case no tracklet is available
constexpr int	TRACKLETENDMARKER = 0x10001000
	marker for the end of tracklets in raw data, 2 of these.
constexpr int	PADDINGWORD = 0xeeeeeeee
	half-CRU links will be padded with this words to get an even number of 256bit words
constexpr int	DIGITENDMARKER = 0x0
	marker for the end of digits in raw data, 2 of these
constexpr int	MAXDATAPERLINK32 = 13824
	max number of 32 bit words per link ((21x12+2+4)*64) 64 mcm, 21 channels, 10 words per channel 2 header words(DigitMCMHeader DigitMCMADCmask) 4 words for tracklets.
constexpr int	MAXDATAPERLINK256 = 1728
	max number of linkwords per cru link. (256bit words)
constexpr int	MAXEVENTCOUNTERSEPERATION = 200
	how far apart can subsequent mcmheader event counters be before we flag for concern, used as a sanity check in rawreader.
constexpr int	MAXMCMCOUNT = 69120
	at most mcm count maxchamber x nrobc1 nmcmrob
constexpr int	MAXLINKERRORHISTOGRAMS = 10
	size of the array holding the link error plots from the raw reader
constexpr int	MAXPARSEERRORHISTOGRAMS = 60
	size of the array holding the parsing error plots from the raw reader
constexpr unsigned int	ETYPEPHYSICSTRIGGER = 0x2
	CRU Half Chamber header eventtype definition.
constexpr unsigned int	ETYPECALIBRATIONTRIGGER = 0x3
	CRU Half Chamber header eventtype definition.
constexpr int	MAXCRUERRORVALUE = 0x2
	Max possible value for a CRU Halfchamber link error. As of may 2022, can only be 0x0, 0x1, and 0x2, at least that is all so far(may2022).
constexpr int	INVALIDPRETRIGGERPHASE = 0xf
	Invalid value for phase, used to signify there is no hcheader.

Variable Documentation

ADCBASELINE

constexpr int o2::trd::constants::ADCBASELINE = 10

constexpr

baseline in ADC units

Definition at line 71 of file Constants.h.

ADDBITSHIFTSLOPE

constexpr int o2::trd::constants::ADDBITSHIFTSLOPE = 1 << 3

constexpr

in the TRAP the slope is shifted by 3 additional bits compared to the position

Definition at line 66 of file Constants.h.

CHANNELNRNOTRKLT

constexpr int o2::trd::constants::CHANNELNRNOTRKLT = 23

constexpr

this marks channels in the ADC mask which don't contribute to a tracklet

Definition at line 86 of file Constants.h.

CRUPADDING32

constexpr unsigned int o2::trd::constants::CRUPADDING32 = 0xeeeeeeee

constexpr

padding word used in the cru.

Definition at line 85 of file Constants.h.

DIGITENDMARKER

constexpr int o2::trd::constants::DIGITENDMARKER = 0x0

constexpr

marker for the end of digits in raw data, 2 of these

Definition at line 90 of file Constants.h.

ETYPECALIBRATIONTRIGGER

constexpr unsigned int o2::trd::constants::ETYPECALIBRATIONTRIGGER = 0x3

constexpr

CRU Half Chamber header eventtype definition.

Definition at line 98 of file Constants.h.

ETYPEPHYSICSTRIGGER

constexpr unsigned int o2::trd::constants::ETYPEPHYSICSTRIGGER = 0x2

constexpr

CRU Half Chamber header eventtype definition.

Definition at line 97 of file Constants.h.

EXBDEFAULT

constexpr double o2::trd::constants::EXBDEFAULT = 0.0

constexpr

default value for LorentzAngle

Definition at line 78 of file Constants.h.

FIRSTROW

constexpr int o2::trd::constants::FIRSTROW[NSTACK] = {0, 16, 32, 44, 60}

constexpr

first pad row for each stack

Definition at line 44 of file Constants.h.

GRANULARITYTRKLPOS

constexpr float o2::trd::constants::GRANULARITYTRKLPOS = 1.f / PADGRANULARITYTRKLPOS

constexpr

granularity of position in tracklet64 word in pad-widths

Definition at line 69 of file Constants.h.

GRANULARITYTRKLSLOPE

constexpr float o2::trd::constants::GRANULARITYTRKLSLOPE = 1.f / PADGRANULARITYTRKLSLOPE

constexpr

granularity of slope in tracklet64 word in pads/timebin

Definition at line 70 of file Constants.h.

HBFBUFFERMAX

constexpr int o2::trd::constants::HBFBUFFERMAX = 1048576

constexpr

max buffer size for data read from a half cru, (all events)

Definition at line 84 of file Constants.h.

INVALIDPRETRIGGERPHASE

constexpr int o2::trd::constants::INVALIDPRETRIGGERPHASE = 0xf

constexpr

Invalid value for phase, used to signify there is no hcheader.

Definition at line 100 of file Constants.h.

MAXCHAMBER

constexpr int o2::trd::constants::MAXCHAMBER = 540

constexpr

the maximum number of installed chambers

Definition at line 30 of file Constants.h.

MAXCRUERRORVALUE

constexpr int o2::trd::constants::MAXCRUERRORVALUE = 0x2

constexpr

Max possible value for a CRU Halfchamber link error. As of may 2022, can only be 0x0, 0x1, and 0x2, at least that is all so far(may2022).

Definition at line 99 of file Constants.h.

MAXDATAPERLINK256

constexpr int o2::trd::constants::MAXDATAPERLINK256 = 1728

constexpr

max number of linkwords per cru link. (256bit words)

Definition at line 92 of file Constants.h.

MAXDATAPERLINK32

constexpr int o2::trd::constants::MAXDATAPERLINK32 = 13824

constexpr

max number of 32 bit words per link ((21x12+2+4)*64) 64 mcm, 21 channels, 10 words per channel 2 header words(DigitMCMHeader DigitMCMADCmask) 4 words for tracklets.

Definition at line 91 of file Constants.h.

MAXEVENTCOUNTERSEPERATION

constexpr int o2::trd::constants::MAXEVENTCOUNTERSEPERATION = 200

constexpr

how far apart can subsequent mcmheader event counters be before we flag for concern, used as a sanity check in rawreader.

Definition at line 93 of file Constants.h.

MAXHALFCHAMBER

constexpr int o2::trd::constants::MAXHALFCHAMBER = 1080

constexpr

the maximum number of installed half-chambers

Definition at line 31 of file Constants.h.

MAXIMPACTANGLE

constexpr float o2::trd::constants::MAXIMPACTANGLE = 25.f

constexpr

the maximum impact angle for tracks relative to the TRD detector plane to be considered for vDrift and ExB calibration

Definition at line 75 of file Constants.h.

MAXLINKERRORHISTOGRAMS

constexpr int o2::trd::constants::MAXLINKERRORHISTOGRAMS = 10

constexpr

size of the array holding the link error plots from the raw reader

Definition at line 95 of file Constants.h.

MAXMCMCOUNT

constexpr int o2::trd::constants::MAXMCMCOUNT = 69120

constexpr

at most mcm count maxchamber x nrobc1 nmcmrob

Definition at line 94 of file Constants.h.

MAXPARSEERRORHISTOGRAMS

constexpr int o2::trd::constants::MAXPARSEERRORHISTOGRAMS = 60

constexpr

size of the array holding the parsing error plots from the raw reader

Definition at line 96 of file Constants.h.

MPVDEDXDEFAULT

constexpr float o2::trd::constants::MPVDEDXDEFAULT = 42.

constexpr

default Most Probable Value of TRD dEdx

Definition at line 80 of file Constants.h.

NADCMCM

constexpr int o2::trd::constants::NADCMCM = 21

constexpr

the number of ADC channels per MCM

Definition at line 52 of file Constants.h.

NBINSANGLEDIFF

constexpr int o2::trd::constants::NBINSANGLEDIFF = 25

constexpr

the number of bins for the track angle used for the vDrift and ExB calibration based on the tracking

Definition at line 76 of file Constants.h.

NBINSGAINCALIB

constexpr int o2::trd::constants::NBINSGAINCALIB = 320

constexpr

number of bins in the charge (Q0+Q1+Q2) histogram for gain calibration

Definition at line 79 of file Constants.h.

NBITSTRKLPOS

constexpr int o2::trd::constants::NBITSTRKLPOS = 11

constexpr

number of bits for position in tracklet64 word

Definition at line 64 of file Constants.h.

NBITSTRKLSLOPE

constexpr int o2::trd::constants::NBITSTRKLSLOPE = 8

constexpr

number of bits for slope in tracklet64 word

Definition at line 65 of file Constants.h.

NCHAMBER

constexpr int o2::trd::constants::NCHAMBER = 521

constexpr

the number of chambers actually installed

Definition at line 32 of file Constants.h.

NCHAMBERPERSEC

constexpr int o2::trd::constants::NCHAMBERPERSEC = 30

constexpr

the number of chambers per sector

Definition at line 28 of file Constants.h.

NCHANNELSC0

constexpr int o2::trd::constants::NCHANNELSC0 = NROWC0 * NCHANNELSPERROW

constexpr

the number of readout channels per C0 chamber

Definition at line 55 of file Constants.h.

NCHANNELSC1

constexpr int o2::trd::constants::NCHANNELSC1 = NROWC1 * NCHANNELSPERROW

constexpr

the number of readout channels per C1 chamber

Definition at line 56 of file Constants.h.

NCHANNELSPERLAYER

constexpr int o2::trd::constants::NCHANNELSPERLAYER = NCHANNELSPERSECTOR / NLAYER

constexpr

then number of readout channels per layer

Definition at line 59 of file Constants.h.

NCHANNELSPERROW

constexpr int o2::trd::constants::NCHANNELSPERROW = NMCMROBINCOL * 2 * NADCMCM

constexpr

the number of readout channels per pad row

Definition at line 54 of file Constants.h.

NCHANNELSPERSECTOR

constexpr int o2::trd::constants::NCHANNELSPERSECTOR = NCHANNELSTOTAL / NSECTOR

constexpr

then number of readout channels per sector

Definition at line 58 of file Constants.h.

NCHANNELSTOTAL

constexpr int o2::trd::constants::NCHANNELSTOTAL = NSECTOR * NLAYER * (NSTACK - 1) * NCHANNELSC1 + NSECTOR * NLAYER * NCHANNELSC0

constexpr

the total number of readout channels for TRD

Definition at line 57 of file Constants.h.

NCHARGES

constexpr int o2::trd::constants::NCHARGES = 3

constexpr

the number of charges per tracklet (Q0/1/2)

Definition at line 61 of file Constants.h.

NCOLMCM

constexpr int o2::trd::constants::NCOLMCM = 18

constexpr

the number of pads per MCM

Definition at line 53 of file Constants.h.

NCOLUMN

constexpr int o2::trd::constants::NCOLUMN = 144

constexpr

the number of pad columns for each chamber

Definition at line 41 of file Constants.h.

NCPU

constexpr int o2::trd::constants::NCPU = 4

constexpr

the number of CPUs inside the TRAP chip

Definition at line 60 of file Constants.h.

NCRU

constexpr int o2::trd::constants::NCRU = 36

constexpr

the number of CRU we have

Definition at line 36 of file Constants.h.

NCRUPERFLP

constexpr int o2::trd::constants::NCRUPERFLP = 3

constexpr

the number of CRU per FLP

Definition at line 38 of file Constants.h.

NFLP

constexpr int o2::trd::constants::NFLP = 12

constexpr

the number of FLP we have.

Definition at line 37 of file Constants.h.

NHALFCRU

constexpr int o2::trd::constants::NHALFCRU = 72

constexpr

the number of half cru (link bundles)

Definition at line 33 of file Constants.h.

NHCPERSEC

constexpr int o2::trd::constants::NHCPERSEC = 60

constexpr

the number of half-chambers per sector

Definition at line 29 of file Constants.h.

NLAYER

constexpr int o2::trd::constants::NLAYER = 6

constexpr

the number of layers

Definition at line 27 of file Constants.h.

NLINKSPERCRU

constexpr int o2::trd::constants::NLINKSPERCRU = 30

constexpr

the number of links per CRU (two CRUs serve one supermodule)

Definition at line 35 of file Constants.h.

NLINKSPERHALFCRU

constexpr int o2::trd::constants::NLINKSPERHALFCRU = 15

constexpr

the number of links per half cru or cru end point.

Definition at line 34 of file Constants.h.

NMCMHCMAX

constexpr int o2::trd::constants::NMCMHCMAX = 64

constexpr

the maximum number of MCMs for one half chamber (C1 type)

Definition at line 47 of file Constants.h.

NMCMROB

constexpr int o2::trd::constants::NMCMROB = 16

constexpr

the number of MCMs per ROB

Definition at line 46 of file Constants.h.

NMCMROBINCOL

constexpr int o2::trd::constants::NMCMROBINCOL = 4

constexpr

the number of MCMs per ROB in column direction

Definition at line 49 of file Constants.h.

NMCMROBINROW

constexpr int o2::trd::constants::NMCMROBINROW = 4

constexpr

the number of MCMs per ROB in row direction

Definition at line 48 of file Constants.h.

NOTRACKLETFIT

constexpr int o2::trd::constants::NOTRACKLETFIT = 31

constexpr

this value is assigned to the fit pointer in case no tracklet is available

Definition at line 87 of file Constants.h.

NROBC0

constexpr int o2::trd::constants::NROBC0 = 6

constexpr

the number of ROBs per C0 chamber

Definition at line 50 of file Constants.h.

NROBC1

constexpr int o2::trd::constants::NROBC1 = 8

constexpr

the number of ROBs per C1 chamber

Definition at line 51 of file Constants.h.

NROWC0

constexpr int o2::trd::constants::NROWC0 = 12

constexpr

the number of pad rows for chambers of type C0 (installed in stack 2)

Definition at line 42 of file Constants.h.

NROWC1

constexpr int o2::trd::constants::NROWC1 = 16

constexpr

the number of pad rows for chambers of type C1 (installed in stacks 0, 1, 3 and 4)

Definition at line 43 of file Constants.h.

NSECTOR

constexpr int o2::trd::constants::NSECTOR = 18

constexpr

the number of sectors

Definition at line 25 of file Constants.h.

NSTACK

constexpr int o2::trd::constants::NSTACK = 5

constexpr

the number of stacks per sector

Definition at line 26 of file Constants.h.

PADDINGWORD

constexpr int o2::trd::constants::PADDINGWORD = 0xeeeeeeee

constexpr

half-CRU links will be padded with this words to get an even number of 256bit words

Definition at line 89 of file Constants.h.

PADGRANULARITYTRKLPOS

constexpr int o2::trd::constants::PADGRANULARITYTRKLPOS = 40

constexpr

tracklet position is stored in units of 1/40 pad

Definition at line 67 of file Constants.h.

PADGRANULARITYTRKLSLOPE

constexpr int o2::trd::constants::PADGRANULARITYTRKLSLOPE = 128

constexpr

tracklet deflection is stored in units of 1/128 pad per time bin

Definition at line 68 of file Constants.h.

T0DEFAULT

constexpr float o2::trd::constants::T0DEFAULT = 1.2

constexpr

default value for t0

Definition at line 81 of file Constants.h.

TIMEBINS

constexpr int o2::trd::constants::TIMEBINS = 30

constexpr

the number of time bins

Definition at line 74 of file Constants.h.

TRACKLETENDMARKER

constexpr int o2::trd::constants::TRACKLETENDMARKER = 0x10001000

constexpr

marker for the end of tracklets in raw data, 2 of these.

Definition at line 88 of file Constants.h.

TRDLINKID

constexpr int o2::trd::constants::TRDLINKID = 15

constexpr

hard coded link id, specific to TRD

Definition at line 39 of file Constants.h.

VDRIFTDEFAULT

constexpr double o2::trd::constants::VDRIFTDEFAULT = 1.546

constexpr

default value for vDrift

Definition at line 77 of file Constants.h.