LGPS Matrix
From GlueXWiki
Notes on the Physical Condition of Detectors
| PS Detector Codes and Comments | ||
| PMT # | PMT Serial # | Comments |
| 1 | 5235 | No notable defects |
| 2 | 5230 | No notable defects |
| 3 | 5261 | Minor clouding around edges of glue |
| 4 | 5185 | 1 cm horizontal scratch on scintillator; Small chip in corner of scintillator |
| 5 | 5206 | No notable defects |
| 6 | 5194 | No notable defects |
| 7 | 5216 | No notable defects |
| 8 | 5203 | No notable defects |
| 9 | 5223 | No notable defects |
| 10 | 5148 | 3 scratches on scintillator approximately 2 cm long, about width of a hair |
| 11 | 5167 | Glued off center |
| 12 | 5146 | Minor clouding around edge |
| 13 | 5164 | Scratched Scintillator |
| 14 | 5141 | No notable defects |
| 15 | 5156 | 3 minor scratches on scintillator |
| 16 | 5271 | No notable defects |
| 17 | 5269 | Off center gluing, small scratch on scintillator |
| 18 | 5259 | 1 cm scratch on flat side of light guide near scintillator about the thickness of a fingernail |
A Word on Clouding
Clouding is a word we use to describe an apparent color change in the cured glue. At these points the light guide is not well connected and the air between the PMT and light guide make the glue seem "cloudy". An example of this can be seen here:
Most of the detectors exhibiting this characteristic came apart due to the weakened connection. All of those that came apart did so cleanly and are in the process of being reglued with no damage to the detectors.
