Difference between revisions of "Alternative readout"
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(→Options for readout of the Bcal using existing technologies) |
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*#* planacons, wire mesh pmts | *#* planacons, wire mesh pmts | ||
*# magnetic fringe fields / shielding | *# magnetic fringe fields / shielding | ||
− | *#* | + | *#* preliminary field calculations using ANSYS available (on hard copy) |
*# cabling / number and sizes of cables / signal degradation | *# cabling / number and sizes of cables / signal degradation | ||
*#* cable differences between various detectors, e.g. HV | *#* cable differences between various detectors, e.g. HV |
Revision as of 08:42, 9 June 2008
Options for readout of the Bcal using existing technologies
- Readout of the barrel calorimeter based on conventional photomultiplier tubes (GlueX-doc-832, Jun 2007)
- Issues that need to be considered (rough outline)
- light guides and collection
- fiber light guides? re-evaluation of the granularity for the inner cal
- light detector
- planacons, wire mesh pmts
- magnetic fringe fields / shielding
- preliminary field calculations using ANSYS available (on hard copy)
- cabling / number and sizes of cables / signal degradation
- cable differences between various detectors, e.g. HV
- dark box / "wrapping of detector"
- presently no scheme has been worked out for any scenario
- impact on photon reconstruction [what is our current geometry?]
- what material is included for the WCs/SiPMs/cables?
- cost estimates
- light guides and collection
- Comments:
- Area of fibers cover 50% of the area of the end of the Bcal. Reduction is 2.
- Area of the output of the WC (1.2 cm2) reduces the readout by 4cm2/1.2cm2 = 3.3.
- The Sketch below is to illustrate the space constraints for any light collection and readout system: