Difference between revisions of "EM Calorimetry"

Revision as of 10:27, 21 June 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 <
- W-Shashlik. 2D projective. Fiber spacing < 1cm. Projective depth 25 cm ( > 25 X0)
- Energy resolution 6%/(√ 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
- W-Shashlik. 2D projective.

@@ Line 1: / Line 1: @@
-* Electron Endcap: --4<&eta; < --1.7
+* Electron Endcap: &minus;4 < &eta; < &minus;1.7
 ** PbWO4 crystals: 2cm x 2cm x 20 cm (> 20 X0)
 ** Energy resolution  2%/(&radic; E) &oplus; 1% &oplus; 1%/E
@@ Line 6: / Line 6: @@
 *** Fill factor > 50%
 ** Electonics:  in situ ≥ 250 MHz Digitization (≥ 12 bits)
-* Barrel: -1.7 < &eta; < 0
+* Barrel: &minus;1.7 < &eta; < 0
 ** PbWO4 crystals, 2D projective.  Inner faces &approx; 2cm x 2cm.  Projective depth 20 cm
 ** Energy resolution  2%/(&radic; E) &oplus; 1% &oplus; 1%/E
 ** Spatial resolution (isolated shower) 3mm / (&radic; E)
-* Barrel, &eta; > 0
+* Barrel, 0 < &eta; <
 ** W-Shashlik. 2D projective. Fiber spacing < 1cm. Projective depth 25 cm ( > 25 X0)
 ** Energy resolution  6%/(&radic; E) &oplus; 2% &oplus; 2%/E