Difference between revisions of "EM Calorimetry"

Latest revision as of 11:05, 1 November 2021

Electron Endcap: −4 < η < −1.7
- PbWO4 crystals: 2cm x 2cm x 20 cm (> 20 X0)
- Energy resolution 2%/(√ E) ⊕ 1% ⊕ 1%/E
- Spatial resolution (isolated shower) 3mm / (√ E)
- Readout: Si-PMT, with MCP-PMT at small radius (high neutron fluence)
  - Fill factor > 50%
- Electonics: in situ ≥ 250 MHz Digitization (≥ 12 bits)
Barrel: −1.7 < η < 0
- PbWO4 crystals, 2D projective. Inner faces ≈ 2cm x 2cm. Projective depth 20 cm
- Energy resolution 2%/(√ E) ⊕ 1% ⊕ 1%/E
- Spatial resolution (isolated shower) 3mm / (√ E)
Barrel, 0 < η < 1.4
- W-Shashlik. 2D projective. Fiber spacing < 1cm. Projective depth 25 cm ( > 25 X0)
- Energy resolution 6.3%/(√ E) ⊕ 2% ⊕ 2%/E
- Two-cluster spatial separation: ≤ 1 cm
- Readout: Si-PMT, each fiber diffused to unique pixel
- Electonics: in situ ≥ 250 MHz Digitization (≥ 12 bits)
Ion Endcap 1.4 < η < 4
- W-Shashlik. 2D projective.

@@ Line 10: / Line 10: @@
 ** Energy resolution  2%/(&radic; E) &oplus; 1% &oplus; 1%/E
 ** Spatial resolution (isolated shower) 3mm / (&radic; E)
-* Barrel, 0 < &eta; <
+* Barrel, 0 < &eta; < 1.4
 ** W-Shashlik. 2D projective. Fiber spacing < 1cm. Projective depth 25 cm ( > 25 X0)
-** Energy resolution  6%/(&radic; E) &oplus; 2% &oplus; 2%/E
+** Energy resolution  6.3%/(&radic; E) &oplus; 2% &oplus; 2%/E
 ** Two-cluster spatial separation: ≤ 1 cm
 ** Readout:  Si-PMT, each fiber diffused to unique pixel
 ** Electonics:  in situ ≥ 250 MHz Digitization (≥ 12 bits)
-* Ion Endcap
+* Ion Endcap 1.4 < &eta; < 4
 ** W-Shashlik. 2D projective.