Difference between revisions of "Detectors"

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=='''Detectors'''==
 
=='''Detectors'''==
  
* The detectors are described in the following POLOG Entry:
+
* The detectors are described in the following POLOG Entries:
  
http://opweb.acc.jlab.org/CSUEApps/elog02/elog_item.php?elog_id=1542515
 
  
https://cebaf.jlab.org/elog/entry/1542515
+
https://logbooks/entry/1542515
 +
 
 +
https://logbooks/entry/1542519
 +
 
 +
https://logbooks/entry/1542529
  
  
Line 25: Line 28:
  
  
=='''Logic Setup'''==
+
=='''Old Logic Setup'''==
  
 
[[file:Mott_Logic.jpg||600px|]]
 
[[file:Mott_Logic.jpg||600px|]]
Line 79: Line 82:
 
|-
 
|-
 
| '''LEFT'''
 
| '''LEFT'''
| '''1+2+8 ns'''  
+
| '''0.5+4+16+32 ns'''  
 
|-
 
|-
 
| '''RIGHT'''
 
| '''RIGHT'''
| '''4+8 ns'''  
+
| '''0.5+1+2+16+32 ns'''  
 
|-
 
|-
 
| '''UP'''
 
| '''UP'''
| '''0.5+4+8 ns'''  
+
| '''1+2+16+32 ns '''  
 
|-  
 
|-  
 
| '''DOWN'''
 
| '''DOWN'''
| '''1+4+8 ns'''  
+
| '''0.5+2+16+32 ns'''  
 
|-
 
|-
 
|}
 
|}
Line 159: Line 162:
  
 
-----
 
-----
 
 
  
 
=='''New Logic Setup'''==
 
=='''New Logic Setup'''==
Line 166: Line 167:
 
The above is what we had in December 2013 and earlier. On Jan 13, 2014:
 
The above is what we had in December 2013 and earlier. On Jan 13, 2014:
  
  1- Adjusted HV such that signals are '''-200 mV'''.
+
  1- Adjusted HV such that signals of ΔE and E are '''-200 mV'''. FADC range = 0 to -500 mV, 0 to 2<sup>12</sup> = 4096.  
 
  2- Set E thresholds = '''-25 mV'''.
 
  2- Set E thresholds = '''-25 mV'''.
 
  3- Set ΔE thresholds = '''-25 mV'''.
 
  3- Set ΔE thresholds = '''-25 mV'''.
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|-
 
|-
 
| '''LEFT'''
 
| '''LEFT'''
| '''-1070 V'''  
+
| '''-1300 V'''  
 
|-
 
|-
 
| '''RIGHT'''
 
| '''RIGHT'''
| '''-1070 V'''  
+
| '''-1320 V'''  
 
|-
 
|-
 
| '''UP'''
 
| '''UP'''
| '''-1070 V'''   
+
| '''-1230 V'''   
 
|-  
 
|-  
 
| '''DOWN'''
 
| '''DOWN'''
| '''-1080 V'''   
+
| '''-1320 V'''   
 
|-
 
|-
 
|}
 
|}
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|-
 
|-
 
| '''RIGHT'''
 
| '''RIGHT'''
| '''-1200 V'''  
+
| '''-1185 V'''  
 
|-
 
|-
 
| '''UP'''
 
| '''UP'''
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|-  
 
|-  
 
| '''DOWN'''
 
| '''DOWN'''
| '''-1230 V'''   
+
| '''-1225 V'''   
 
|-
 
|-
 
|}
 
|}
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|-
 
|-
 
| '''LEFT'''
 
| '''LEFT'''
| '''30 ns'''  
+
| '''16+32 ns'''  
 
|-
 
|-
 
| '''RIGHT'''
 
| '''RIGHT'''
| '''30 ns'''  
+
| '''16+32 ns'''  
 
|-
 
|-
 
| '''UP'''
 
| '''UP'''
| '''30 ns'''  
+
| '''16+32 ns'''  
 
|-  
 
|-  
 
| '''DOWN'''
 
| '''DOWN'''
| '''30 ns'''  
+
| '''16+32 ns'''  
 
|-
 
|-
 
|}
 
|}
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[[file:ADCdEs_7248.gif||500px|]]
+
[[file:ADCdEs_7298.gif||500px|]]
  
  
[[file:ADCEs_7248.gif||500px|]]
+
[[file:ADCEs_7298.gif||500px|]]
  
  

Latest revision as of 07:51, 25 April 2014

Detectors

  • The detectors are described in the following POLOG Entries:


https://logbooks/entry/1542515

https://logbooks/entry/1542519

https://logbooks/entry/1542529


Data Sheets

- The Acrylic Light Guide is 0.125 inch x 1 inch wide x 2 inch long (data sheet: media:Light_Guide.pdf).
- The Plastic Scintillator for the DE detector is an EJ-212 machine finish of the size 1 mm x 1 inch x 1 inch 
(data sheet: media:EJ-212.pdf).
- The Plastic Scintillator Rod for the E detector is an EJ-200 (data sheet: media:EJ-200.pdf) of the size 
3 inch diameter x 2.5 inch long painted with EJ-510 (data sheet: media:EJ-510.pdf) with one end clear.
- The 1-inch PMT is R6427 (media:PMT_R6427.pdf) in an H7415 Assembly.
- The 3-inch PMT is R6091 (media:PMT_R6091.pdf) in an H6559 Assembly.


Old Logic Setup

Mott Logic.jpg

TEK0377.jpg


  • ΔE Detector PMT HV:
LEFT -1000 V
RIGHT -1000 V
UP -1000 V
DOWN -1080 V


  • E Detector PMT HV:
LEFT -1125 V
RIGHT -1120 V
UP -1140 V
DOWN -1160 V


LEFT 0.5+4+16+32 ns
RIGHT 0.5+1+2+16+32 ns
UP 1+2+16+32 ns
DOWN 0.5+2+16+32 ns


LEFT -185 mV
RIGHT -189 mV
UP -185 mV
DOWN -186 mV


  • ΔE Detector 715 Constant Fraction Timing Discriminator Thresholds (media:715ds.pdf):

Shaping Delay = 2 ns

LEFT -25 mV
RIGHT -29 mV
UP -27 mV
DOWN -42 mV


  • E Detector 715 Constant Fraction Timing Discriminator Thresholds (media:715ds.pdf):

Shaping Delay = 4 ns

LEFT -25 mV
RIGHT -25 mV
UP -30 mV
DOWN -30 mV



New Logic Setup

The above is what we had in December 2013 and earlier. On Jan 13, 2014:

1- Adjusted HV such that signals of ΔE and E are -200 mV. FADC range = 0 to -500 mV, 0 to 212 = 4096. 
2- Set E thresholds = -25 mV.
3- Set ΔE thresholds = -25 mV.
4- Set the Veto thresholds to -450 mV.


  • ΔE Detector PMT New HV:
LEFT -1300 V
RIGHT -1320 V
UP -1230 V
DOWN -1320 V



  • E Detector PMT New HV:
LEFT -1200 V
RIGHT -1185 V
UP -1220 V
DOWN -1225 V



  • ΔE Detector New Delays:
LEFT 16+32 ns
RIGHT 16+32 ns
UP 16+32 ns
DOWN 16+32 ns


  • E and ΔE signal triggered from the E signal with a trigger threshold of -50 mV. PMT HVs are adjusted such that all signals are -200 mV.


EDE Raw Signals LEFT.jpg
EDE Raw Signals RIGHT.jpg
EDE Raw Signals UP.jpg
EDE Raw Signals DOWN.jpg


ADCdEs 7298.gif


ADCEs 7298.gif




  • E trigger gate (30 ns) and ΔE trigger gate (5 ns) triggered from E signal (with ΔE delays listed ) and the E-ΔE Coincidence signal.


EDE Disc Signals LEFT.jpg
EDE Disc Signals RIGHT.jpg
EDE Disc Signals UP.jpg
EDE Disc Signals DOWN.jpg