CMS Document 2941-v1
ECAL Spike Plots
- Document #:
- CMS-doc-2941-v1
- Document type:
- Other
- Submitted by:
- Nicolo Cartiglia
- Updated by:
- Nicolo Cartiglia
- Document Created:
- 25 Aug 2010, 14:50
- Contents Revised:
- 26 Aug 2010, 17:39
- Metadata Revised:
- 16 Nov 2010, 10:02
- Abstract:
- Images and documents relating to spokes observed in ECAL
In collision data we observe anomalous signals in ECAL, having the appearance of large energy deposits in a single crystal.
Characteristics:
These signals are uniformly distributed and only in the barrel part of the calorimeter where the readout is by APD; they are not seen in the EE crystals readout by VPTs.
The rate of these anomalous signals is of order one per 103 minimum-bias events at c.m.s. of 900 GeV. Origin:
The origin of the signal is energy deposited by heavily ionizing particles in the avalanche photodiode.
- Files in Document:
-
- caption-spike-2.txt (579 bytes)
- caption-spike-3.txt (347 bytes)
- caption-spike-4.txt (571 bytes)
- smallspike-1.png (9.8 kB)
- smallspike-1a.png (32.3 kB)
- smallspike-2.png (16.0 kB)
- smallspike-2a.png (10.9 kB)
- smallspike-3.png (13.4 kB)
- smallspike-4.png (18.2 kB)
- spike-1.png (95.2 kB)
- spike-1.ppt (140.5 kB)
- spike-1a.png (153.3 kB)
- spike-2.png (76.0 kB)
- spike-2a.png (5.5 kB)
- spike-3.png (8.8 kB)
- spike-4.png (9.0 kB)
- spike-intro.txt (528 bytes)
- spike.pdf (381.6 kB)
- spike.ppt (770.0 kB)
- Topics:
- Authors: