Difference between revisions of "Monitoring System Requirements"
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| Relative gain check || yes || yes | | Relative gain check || yes || yes | ||
|- | |- | ||
| − | | Linearity check || | + | | Linearity check || low end only || low end only |
|- | |- | ||
| − | | Temperature stability || || | + | | Temperature stability || yes, sensors in box|| sensors in areal spread? |
|- | |- | ||
| − | | Tower row flashing || || | + | | Tower row flashing || yes, multiplexer || yes, multiplexer |
|- | |- | ||
| Simultaneously flash both ends || || 1<sup>o</sup> causes 3% gain change | | Simultaneously flash both ends || || 1<sup>o</sup> causes 3% gain change | ||
| Line 20: | Line 20: | ||
|- | |- | ||
| Geometrical constraints || Approximately 90% of front 4x4 cm2 area available || packing of WC and LGs, LED fitting, cable routing | | Geometrical constraints || Approximately 90% of front 4x4 cm2 area available || packing of WC and LGs, LED fitting, cable routing | ||
| + | |- | ||
| + | | R&D done || Some, solution not preferred || Extensive, mature solution exists | ||
|- | |- | ||
| Cost || Approximately 90% of front 4x4 cm2 area available || packing of WC and LGs, LED fitting, cable routing | | Cost || Approximately 90% of front 4x4 cm2 area available || packing of WC and LGs, LED fitting, cable routing | ||
Revision as of 17:56, 8 December 2010
| Characteristic | LED/fibre | LED/wire |
|---|---|---|
| Dead/alive or on/off | yes | yes |
| Timing check/offset | yes | yes |
| Relative gain check | yes | yes |
| Linearity check | low end only | low end only |
| Temperature stability | yes, sensors in box | sensors in areal spread? |
| Tower row flashing | yes, multiplexer | yes, multiplexer |
| Simultaneously flash both ends | 1o causes 3% gain change | |
| Location of calibration input | From front to monitor rad damage | light guide tapered side |
| Geometrical constraints | Approximately 90% of front 4x4 cm2 area available | packing of WC and LGs, LED fitting, cable routing |
| R&D done | Some, solution not preferred | Extensive, mature solution exists |
| Cost | Approximately 90% of front 4x4 cm2 area available | packing of WC and LGs, LED fitting, cable routing |
- Comment: Time (and temperature) stability most important.
- Comment: Option of delivering a range of light intensities important (e.g. using various filter settings).
- Comment from Werner: The flexibility in the use of the LED would be very useful for the start counter. Christina: Still need to test stability.
- Questions to Matt: What uniformity could one expect from the plexiglass input system? How many fibers were used to pulse the plexiglass, i.e. how often were they spaced?
- Comment: Matt drew attention to an LED pulser by Paul Smith which might be a useful reference.
