IDEA for a measurement of the Pion Structure Function using BONUS rTPC, SBS, BigBite, LAC in Hall A.
BigBite Plan
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Navaphon Muangma (Tai) “SRC collaboration Meeting” Feb 21, 2012 BigBite Plan 1
description
BigBite Plan. BigBite Calibration. MWDC T0 [done] Absolute position dE&E TDC TOF ADC Energy Gap correction!. The Time of flight and the energy deposited can be used to identify the coincident and the particle id. Both tdc and adc will be calibrate the same as the S1 and S2. - PowerPoint PPT Presentation
Transcript of BigBite Plan
Navaphon Muangma (Tai)“SRC collaboration Meeting” Feb 21, 2012
BigBite Plan
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Navaphon Muangma (Tai)“SRC collaboration Meeting” Feb 21, 2012
BigBite Calibration
• MWDC– T0 [done]– Absolute position
• dE&E– TDC TOF– ADC Energy– Gap correction!
• The Time of flight and the energy deposited can be used to identify the coincident and the particle id.
• Both tdc and adc will be calibrate the same as the S1 and S2
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Navaphon Muangma (Tai)“SRC collaboration Meeting” Feb 21, 2012
Optics plan
- The t0 of the MWDC were set.
- The optics can be done in this point as it only involve the MWDC only
- (Can also be improve with the help of the E plane hit location)
1. The vertex is the first part of the optics to be set.Reason: -Dipole magnet -the aid from the left arm vertex
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Navaphon Muangma (Tai)“SRC collaboration Meeting” Feb 21, 2012
Optics plan
2. The theta and phi matrix are calibrated with the sieve slit run. 3. The final data is the momentum which strongly related in theta.
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Navaphon Muangma (Tai)“SRC collaboration Meeting” Feb 21, 2012
dE vs E
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Navaphon Muangma (Tai)“SRC collaboration Meeting” Feb 21, 2012
Time of flight
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Current tof resolution is with sigma = 4.6 ns
The background to signal ration are:7.05 %
