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DIRC technology

R&D department

  • DIRC
    • Overview
    • Cherenkov radiation
    • DIRC
    • Experiments
    • Ch. angle calculator
    • Material properties
    • Other
  • PANDA barrel DIRC
    • Overview
    • Baseline design
    • Design options
    • Focusing system
    • Photon yield
    • Time spectrum
    • PID
    • Other
  • Prototype
    • Overview
    • MCP layout
    • Photon yield
    • Hit pattern
    • Time spectrum
    • Calibration
    • SPR
    • PID
    • Beam J14
    • Beam A14
    • Beam M15
    • Beam J15
    • Beam O16
    • Beam A17
    • DIRC@EIC
    • DIRC@GlueX
    • DIRC@Torch
    • Other
  • Gallery
  • Contact

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Overview

  • First steps
  • geant geometryX 2014
  • Hld analysis workflow
  • prt layout 2015
  • Software installation

MCP layout

  • 1.5 pixel shift
  • 2.5 pixel shift
  • 2.5 pixel shift L1
  • 2.5 pixel shift L2
  • Mcp layout optimization 2015

Photon yield

  • mcp-prism airgap
  • Photons from Deltas
  • Photon yield
  • Photon yield. Plate
  • Photon yield. Proton

Hit pattern

  • Angle scan 1 (beam)
  • Angle scan 2 (beam)
  • Cherenkov cone position
  • hit pattern for L3
  • Mom. vs. particle
  • Monochromatic Cherenkov
  • Pattern vs. path
  • Pattern vs. reflections in prism
  • Plate, beam test geom
  • Plate pion@1.7
  • Plate pion@1.7 max step
  • Plate's hit pattern.
  • Scan over Cherenkov phi
  • step scan. real geom L0
  • step scan. real geom L2
  • Without MCPs
  • z scan of the hit pattern

Time spectrum

  • Calibration spectrum. 50mm
  • PiLas data 14.07.14
  • PiLas data 14.07.14 dch1952
  • PiLas + prelim. corrections
  • Time map 33
  • TOT double structure
  • z scan of the time

Calibration

  • best trigger search
  • Calib. curves. Beam+Pilas
  • Calib. of the fine time. Pilas
  • Calibration of the fine time 0
  • Calibration prism
  • Calibration spectrum. 75mm
  • Walk corr. table

SPR

  • SPR decomposition
  • SPR prj. vs. angle
  • SPR prj. vs. angle. 2012
  • SPR vs. angle
  • SPR vs. pixel size

PID

  • lh sep. for time imaging
  • time imaging j15

Beam J14

  • HP vs. beam width
  • HP vs tilt of dirc
  • J14 corrected time
  • J14 data info
  • J14 hit patterns.
  • step scan

Beam A14

Beam M15

  • debug info may15
  • Fine time catibration 2015
  • LE TE map
  • sim of hit pattern M15

Beam J15

  • Calibration HowTo
  • Calibration Summary
  • chromaticity HP
  • cluster size
  • Detection efficiency
  • Examples of reconst.
  • HP match Sel
  • j15 charge sharing in sim
  • J15 data info
  • J15 plots
  • LH separation
  • Likelihood calculation
  • matched LE
  • Match of the HP
  • Match of the LE
  • mix plots
  • noise investigation
  • PDF for p/pi
  • pre reco
  • pre time diff
  • Quantum efficiency
  • selection cuts
  • single event hit pattern
  • SPR vs time diff. cut
  • time alignment
  • time diff vs ctheta cut
  • Time imaging. LogLikelihood.
  • timing resolution
  • tof correction
  • tof selection
  • tof walk correction
  • TOT

Beam O16

  • 9MCP without shift
  • 9 vs 12 mcp
  • c angle fit o16
  • hit pattern o16
  • LE vs run time
  • mirror reflectivity
  • multiplicity CERN16
  • offset scan 100V
  • offset scan 150V
  • offset scan 200V
  • offset scan 50V
  • pdfs for S208
  • pdfs for S208 TOF1
  • pdfs for S209
  • photon yield o16
  • photon yield o16 plate
  • sep power o16
  • sep power vs. beam prof
  • simulations of pdf
  • single event HP
  • statistic scan for pdf
  • TOF1 walk
  • TOT vs LE S17
  • TOT vs LE S17 with corr

Beam A17

  • A17 data info
  • A17 plots
  • angle match for 50 deg
  • beam direction scan
  • dark counts 17
  • geant visualization
  • hit pattern bar A17
  • hit pattern plate A17
  • le match: sim vs. data
  • le offset
  • mcp multiplicity
  • minimization parameters
  • momentum scan A17
  • pion-proton mult ratio
  • plate vs bar for 3LC
  • prism-lens step scan
  • PY: grease vs air
  • quantum efficiency 17
  • separation vs phi
  • sep power vs nph
  • time resolution A17
  • tir separation vs tof cut
  • tof2 walk correction
  • TOF PID 17
  • walk correction A17
  • x scan

DIRC@EIC

  • 3.5 cm vs 7 cm bar width
  • 3 sigma contour
  • 4x5 PMTs layout
  • azimuthal map
  • background track
  • bar box window
  • bar imperfections
  • bar thickness
  • b-field
  • cern layout with 256 pixels
  • Cherenkov circle
  • Cherenkov circle fit
  • cherenkov ring fit
  • core with field
  • corrections
  • DIRC designs
  • DIRC@EIC prototype sim
  • DIRC@EIC prototype sim 256 vs 64
  • e/pi performance
  • e/pi rejection
  • fast pid
  • fast sim for EIC DIRC
  • focusing prism
  • geant4 11.1
  • hit pattern vs propagation time
  • hpDIRC perfromance
  • ideal focusing with thick plate as EV
  • LAPPD photon multiplicity
  • lens3's reflective edge
  • lens3 with 2mm pixels
  • lens vs no lens
  • low height lens
  • mcp-pmts 8x8 vs 16x16 pi/e
  • mcp-pmts 8x8 vs 16x16 pi/K
  • Measured arrival time vs. calculated.
  • momentum scan for 32x32 pixels PMT
  • MS for fast sim
  • neural net reconstruction
  • nlak33 vs sapphire
  • number of reflections
  • PANDA bars with BaBar bars
  • path length
  • pdf scan for 11 bar
  • pdf scan for 7 bar
  • performance vs design
  • performance vs tracking resoluton
  • physics list comparision
  • pid efficiency map
  • pi/e reconstruction
  • pixel size scan @ 6 GeV/c
  • plate as EV
  • plate as EV 2
  • post-dirc tracking
  • qe comparison
  • qe comparison for hpDIRC
  • radii scan for eic
  • radii scan for lens with EV-plate
  • Realistic tracking
  • Realistic tracking (updated)
  • Realistic tracking (v3)
  • separation vs. track res
  • sep vs tracking resolution
  • split EV with split prism
  • Spr fit for eiddirc
  • Spr fit for eiddirc. No cuts
  • SPR vs sensor dimensions
  • start time resolution
  • start time resolution TI
  • theta vs bar
  • Time difference
  • Time difference cut
  • time precision scan
  • time spread at epic dirc
  • TI with monochromatic light
  • TOP resolution
  • tracking resolution
  • track in prism
  • track smearing at bar
  • transport efficiency
  • transport efficiency with scaled RC

DIRC@GlueX

  • angle scan for gluex dirc
  • angle scan g1
  • angle vs mirror scan
  • bar rotation
  • Cherenkov ring fit
  • Cherenkov track resolution
  • chromatic correction
  • delta time shift
  • first beam hit pattern
  • geometrical reco for gluex
  • hit pattern
  • hit pattern 2
  • hitpatterns with hdgeant4
  • hit pattern vs theta-phi
  • lut improvements
  • mirror scan for gluex dirc
  • pdf scan map
  • per-bin plots
  • performace maps
  • performance vs particle charge
  • Photon multiplicity
  • photon yield
  • pi/K sep power (updated)
  • pion/kaon sep power
  • reco cuts
  • reco cuts 2
  • reconstructed C angle
  • time difference
  • time imaging
  • track correction
  • transport efficiency
  • v01 vs v12

DIRC@Torch

  • hit position scan
  • laser calibration
  • torch prototype in prtdirc

Other

  • 3-layer lens designs
  • beam direction scan j18
  • beam profile, trigger
  • Cherenkov ring prt2015
  • coma effect
  • cookie vs. grease
  • edd
  • event by event
  • Focal Plane
  • focal plane L3 jlab
  • focal plane of RMI lens
  • Focal Plane vs Energy
  • Focal plane with dist
  • geometrical reconstruction j18
  • lens 2 vs. lens 6 RMI
  • lens thickness
  • mcp layouts for 2017
  • multiplicity
  • offset scan 01.07.18
  • offset scan 18.10.16
  • pico time resolution
  • radii scan for 3-layer cyl lens
  • radii scan for 3LC 5 mm
  • radii scan for 3LCL with cut
  • radii scan for pbf2
  • scan of mcp12
  • signal shape SEQ 1
  • signal shape SEQ (updated)
  • signal shape STD (updated)
  • Threshold scan 3
  • Threshold scan 4
  • tot
  • yield vs intensity and threshold
  • yield vs pilas intensity
  • yield vs pilas intensity 2
PANDA bars with BaBar bars
qe comparison for hpDIRC
transport efficiency with scaled RC
hpDIRC perfromance
number of reflections
4x5 PMTs layout
bar imperfections
track in prism
low height lens
theta vs bar
corrections
cherenkov ring fit
split EV with split prism
radii scan for lens with EV-plate
plate as EV 2
3 sigma contour
pid efficiency map
azimuthal map
e/pi performance
Realistic tracking (v3)
ideal focusing with thick plate as EV
Realistic tracking (updated)
tracking resolution
bar box window
geant4 11.1
transport efficiency
neural net reconstruction
time precision scan
track smearing at bar
time spread at epic dirc
Realistic tracking
hit pattern vs propagation time
LAPPD photon multiplicity
plate as EV
background track
momentum scan for 32x32 pixels PMT
pixel size scan @ 6 GeV/c
mcp-pmts 8x8 vs 16x16 pi/e
mcp-pmts 8x8 vs 16x16 pi/K
DIRC@EIC prototype sim 256 vs 64
physics list comparision
e/pi rejection
core with field
performance vs tracking resoluton
nlak33 vs sapphire
performance vs design
radii scan for eic
DIRC designs
MS for fast sim
post-dirc tracking
bar thickness
b-field
cern layout with 256 pixels
3.5 cm vs 7 cm bar width
pdf scan for 7 bar
pdf scan for 11 bar
pi/e reconstruction
focusing prism
fast sim for EIC DIRC
start time resolution TI
TI with monochromatic light
TOP resolution
start time resolution
path length
DIRC@EIC prototype sim
sep vs tracking resolution
qe comparison
fast pid
separation vs. track res
SPR vs sensor dimensions
Time difference cut
Time difference
lens3 with 2mm pixels
lens3's reflective edge
lens vs no lens
Cherenkov circle fit
Cherenkov circle
Measured arrival time vs. calculated.
Spr fit for eiddirc. No cuts
Spr fit for eiddirc
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