Core Wiki - User contributions [en]

PID summary

2021-08-16T00:19:48Z

Gkalicy:

*Barrel Region (-1.70<η<1.70)
**DIRC: ''e/π/K/p''
*** ''π/K'' ≥ 3σ up to 6 GeV, ≥ 4σ up to 8 GeV
*** ''K/p'' ≥ 3σ up to 12 GeV
*** ''e/π'' 10:1 for 0.7 < p < 1.2 GeV/c
**EMCal
*** γ/π<sup>0</sup> discrimination up to 14 GeV (can be improved with preshower layer)
**Instrumented Flux Return
*** Muon vs neutral hadron discrimination
*** Neutral hadron (n,K_S) angular resolution ~20 mrad
*Electron Endcap (-4.0 <η < 1.7)
** Time-of-Flight: Low-Gain Avalanche Detector (LGad)
*** Goal: < 30 ps rms @ 1.2 m from IP
*** Example detector: ATLAS High Granularity Timing Detector (HGTD)
** PbWO4 Crystal EM Calorimeter
** Instrumented Flux return
*Ion Endcap (1.7 < η < 4.0)
** dual-radiator RICH (Aerogel + gas)
*** pi/K/p > 3σ discrimination from 10 to 60 GeV/c
**W-Shashlik EMCal
** High Granularity Hadronic Calorimetry

[[File:PID.png]]

DIRC

2021-08-16T00:18:24Z

Gkalicy:

CORE barrel hpDIRC geometry:

[[File:HpDIRC-CORE1.png]]

Low-Mass Thin hpDIRC assumes 10mm thick radiator bars which are a great option for 2nd EIC detector (most or all of the BaBar DIRC bars will be used on 1st EIC detector). Reduction in mass will be beneficial for the Emcal performance. The small 47 cm radius makes new bars option more affordable. Thinner bars lowers impact of multiple scattering and assures significant electron pion ID improvement at lower momenta, �without significantly affecting pion kaon ID above 4 GeV/c!

[[File:HpDIRC-CORE2.png]]

Performance comparison between 10mm and 17mm (BaBar DIRC) bar thickness in hpDIRC using full Geant4 simulation for 30 deg polar angle.

[[File:HpDIRC-CORE3.png]]

Pion/kaon separation power comparison between 10mm and 17mm (BaBar DIRC) bar thickness in hpDIRC using fast simulation.

[[File:HpDIRC-CORE4.png]]

Magnetic field on hpDIRC photosensors is below 0.5T! That is manageable field for commercially available options for MCP-PMTs. If needed for better performance, the expansion volume shape can be optimized for MCP-PMT magnetic field performance by tilted backplane.

[[File:HpDIRC-CORE5.png]]

Start time resolution can be obtained using only "dirc" information. Study performed for pions/kaons @ 6 GeV/c using only one track per event in whole DIRC. With more tracks in event the resolution would improve.

[[File:hpDIRC_t0.png]]

DIRC

2021-08-15T23:54:05Z

Gkalicy:

CORE barrel hpDIRC geometry:

[[File:HpDIRC-CORE1.png]]

47cm radius

[[File:HpDIRC-CORE2.png]]

PID summary

2021-08-15T23:53:07Z

Gkalicy:

File:HpDIRC t0.png

2021-08-15T23:52:12Z

Gkalicy: resolution of hpDIRC as start time

resolution of hpDIRC as start time

File:PID.png

2021-08-15T23:49:24Z

Gkalicy: PID coverage of CORE

PID coverage of CORE

File:HpDIRC-CORE5.png

2021-08-15T23:48:49Z

Gkalicy: hpDIRC with CORE magnetic field

hpDIRC with CORE magnetic field

File:HpDIRC-CORE4.png

2021-08-15T23:47:54Z

Gkalicy: Fast simulation performance of hpDIRC

Fast simulation performance of hpDIRC

File:HpDIRC-CORE3.png

2021-08-15T23:47:03Z

Gkalicy: G4 performance of hpDIRC

G4 performance of hpDIRC

File:HpDIRC-CORE2.png

2021-08-15T23:45:51Z

Gkalicy: Feature of low-mass hpDIRC

Feature of low-mass hpDIRC

DIRC

2021-08-15T23:44:43Z

Gkalicy: Replaced content with "CORE barrel hpDIRC geometry: File:HpDIRC-CORE1.png 47cm radius"

CORE barrel hpDIRC geometry:

[[File:HpDIRC-CORE1.png]]

47cm radius

File:HpDIRC-CORE1.png

2021-08-15T23:43:30Z

Gkalicy: Geometry of hpDIRC in CORE

Geometry of hpDIRC in CORE

DIRC

2021-08-15T23:22:41Z

Gkalicy: Created page with "CORE barrel hpDIRC geometry: 47cm radius 290cm barbox length 16 barboxes, 5 long radiator bars side-by-side in a barbox Radiator bar: 10 x 35 x 2900 mm3 (T x W x L) (2-3 shor..."

CORE barrel hpDIRC geometry:
47cm radius
290cm barbox length
16 barboxes, 5 long radiator bars side-by-side in a barbox
Radiator bar: 10 x 35 x 2900 mm3 (T x W x L) (2-3 shorter bars glued together)
Focusing optics: � Radiation-hard 3-layer spherical lens
Expansion volume: � Solid fused silica prism: 24 x 18 x 30 cm3 (H x W x L)� Additional longitudinal space for MCP-PMTs, readout cards, cables: ~13cm
Readout:� 12 commercial MCP-PMTs per prism, total 49k channels readout by hpDIRC
Number of sectors, barrel radius and bar length can be still optimized for � integration, PID performance largely independent of barrel radius and bar length
Expansion volume shape can be optimized for MCP-PMT magnetic field � performance (tilted backplane)