Difference between revisions of "Coordinate Detector"

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[[category:SBSinfo]]
 
[[category:SBSinfo]]
 
*[https://hallaweb.jlab.org/wiki/images/8/80/Ejensen_corrdet_report.pdf Report] by E. Jensen on the rates in the coordinate detector.
 
*[https://hallaweb.jlab.org/wiki/images/8/80/Ejensen_corrdet_report.pdf Report] by E. Jensen on the rates in the coordinate detector.
* Study of resolution by Mark Jones
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*[https://userweb.jlab.org/~jones/SBS/CDreport.pdf] Report] By L. Pentchev comparing the resolutions and rates for 5mm versus 3mm thick scintillators in the Coordinate Detector. [https://userweb.jlab.org/~jones/SBS/CDreport.tex Tex] version of the report.
**Point target with 4.4 +/- 0.2 GeV electrons. Front face of calorimeter is 526cm from target.
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**3 planes of scintillator planes with 0.5cm thickness, 134cm long and 3cm width.
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**each plane is 300 bars with the middle plane offset by .25cm
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**15cm plastic absorber block in front.
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** Throw electron for vertical and horizontal angle of +/-0.12 radians.
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***[https://hallaweb.jlab.org/wiki/images/a/a6/Cdet_Eloss.gif Plot] of energy loss.
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***[https://hallaweb.jlab.org/wiki/images/9/94/Cdet_Nbar.gif Plot ] of number of bars hit with 4 MeV threshold.
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***[https://hallaweb.jlab.org/wiki/images/6/66/Cdet_Sigma.gif Plot] of Measured minus predicted vertical position.
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** Tables of resolutions and efficiencies with different thresholds
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{|class="wikitable" style="text-align: center" width="50%"
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|-
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!Threshold (MeV)
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! Eff         
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! sigma (mm)
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|-
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|3
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|        0.90
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|          1.01
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|-
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|4
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|            0.89
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|          0.98
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|-
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|4.5
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|          0.87
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|          0.95
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|-
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|5
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|            0.84
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|          0.94
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|-
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|5.5
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|          0.75
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|          1.02
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|-
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|6
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|            0.63
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|          1.06
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|}
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Revision as of 09:42, 27 June 2012

  • Report by E. Jensen on the rates in the coordinate detector.
  • [1] Report] By L. Pentchev comparing the resolutions and rates for 5mm versus 3mm thick scintillators in the Coordinate Detector. Tex version of the report.