smaller EV

Performance comparison for different EV designs.

  • EIC, ePIC, hpDIRC, updated geometry (barrel's R = 766.25)
  • with B-field
  • tracks hitting middle of the bar #5
  • pi/K @ 6 GeV/c
  • 0.5 mrad tracking resolution, unless labeled otherwise
  • 3-layer spherical lens with sapphire, r=[62,36] for prism EV
  • 2x3 and 1x3 layouts; 32x32 pixels HRPPD Incom.24, CE=70%; 100 ps time precision
  • transport efficiency based on BaBar ref. coef. measurements
  • TI with 20k PDF for each particle type.

Default, 300 mm prism depth, 2 rows of HRPPDs:

300 mm, 1 row:

200 mm, 1 row:

200 mm, 1 row, rectangular prism:

100 mm, 1 row:

Example of the hit pattern (30 deg). Default, 300 mm prism depth, 2 rows of HRPPDs :

HP (30 deg). 300 mm, 1 row:

HP (30 deg). 200 mm, 1 row:

HP (30 deg). 200 mm, 1 row, rect:

HP (30 deg). 100 mm, 1 row:

Radii scan. TI reconstruction. 200 mm prism:

Radii scan. TI reconstruction. 200 mm rectangular prism:

Radii scan. TI reconstruction. 100 mm prism: