performance vs design

Performance compassion for different EIC DIRC designs.

• DIRC@EIC designs
• 3-layer spherical lens with saphire, r=[62,36]
• 3 mm pixels HIQ400, CE=95%
• pions and kaons @ 6 GeV/c; pi/e @ 1.2 GeV/c; phi = 0
• 0.5 tracking resolution @ 6 GeV/c, 2.2 @ 1.2 GeV/c. See track resolution scan for more.
• 100 ps time precision
• geometrical reconstruction with averaged LUT from 15M photons
• GR with per-PMT and chromatic corrections
• 20k tracks for pdf generation (per each particle species); 10k for determining separation

Design highlights:

ATHENA

• barrel radius: 964.5 mm (middle of the barbox at 90 degree)
• number of bar boxes: 16
• bar box width: 350
• bar length: 4400
• number of bars in bar box: 10
• PMT layout: 6x4
• z_IP = -600

ECCE

• barrel radius: 729.6 mm (middle of the barbox at 90 degree)
• number of bar boxes: 12
• bar box width: 350
• bar length: 4200
• number of bars in bar box: 10
• PMT layout: 6x4
• z_IP = -400

CORE

• barrel radius: 501.7 mm (middle of the barbox at 90 degree)
• number of bar boxes: 16
• bar box width: 175
• bar length: 2800
• number of bars in bar box: 5
• PMT layout: 3x4
• z_IP = 10

Performance comparison for pi/K @ 6 GeV/c, 0.5 mrad tracking resolution:

Geometrical reconstruction:

Time imaging:

Performance comparison for pi/e @ 1.2 GeV/c, 2.2 mrad tracking resolution:

Geometrical reconstruction:

Time imaging:

ATHENA (photon yield with selection & TI):

ECCE (photon yield with selection & TI):

CORE (photon yield with selection & TI):

With K/p @ 12 GeV/c:

ATHENA (photon yield with selection & TI):

ECCE (photon yield with selection & TI):

CORE (photon yield with selection & TI):

With interaction point at z = 10 mm. Show/Hide

With interaction point at z = 10 mm. With < 50 ns time cut on pdf. Show/Hide

With interaction point at z = 10 mm. Show/Hide