Difference between revisions of "SoLID Ecal Weekly 20230818"
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*Mike's slides on MIP shift (integral) | *Mike's slides on MIP shift (integral) | ||
*Ye's slides on MIP and baseline shift (height), and expected rate of low-energy background in ECal from beam-on-target simulation | *Ye's slides on MIP and baseline shift (height), and expected rate of low-energy background in ECal from beam-on-target simulation | ||
| − | *suggest: | + | *suggest for the MIP shift study: |
**Ye can apply beam current cut to get baseline (from "before pulse" window) for intermediate beam current values; | **Ye can apply beam current cut to get baseline (from "before pulse" window) for intermediate beam current values; | ||
**decompose MIP shift as sum of baseline shift and PMT gain shift. To do so, we need a few plots clearly indicating each component: | **decompose MIP shift as sum of baseline shift and PMT gain shift. To do so, we need a few plots clearly indicating each component: | ||
| Line 16: | Line 16: | ||
#If possible, plot all above vs. background rate instead of beam current (but only if we have a reliable way to get the rate). | #If possible, plot all above vs. background rate instead of beam current (but only if we have a reliable way to get the rate). | ||
| − | * | + | *suggest for rate comparison with beam-on-target simulation: |
| − | + | **Can we add a tiny Edep cut, rather than greater than zero? | |
| − | + | **Can we possibly get this from random trigger FADC raw signals? | |
=SPD timing= | =SPD timing= | ||
*Carter's slides | *Carter's slides | ||
*need to add C-D data, perhaps check the timing propagation | *need to add C-D data, perhaps check the timing propagation | ||
Revision as of 22:50, 18 August 2023
Rate discussion
- Mike's slides on MIP shift (integral)
- Ye's slides on MIP and baseline shift (height), and expected rate of low-energy background in ECal from beam-on-target simulation
- suggest for the MIP shift study:
- Ye can apply beam current cut to get baseline (from "before pulse" window) for intermediate beam current values;
- decompose MIP shift as sum of baseline shift and PMT gain shift. To do so, we need a few plots clearly indicating each component:
- plot total MIP peak integral vs beam current (Mike already has this)
- use 2D peak integral vs. peak height plot, extract a "time factor", let's call it t_trig
- plot baseline vs beam current (Ye already has this but need more current values), expect an exp() function
- multiply baseline with "t_trig" then times two (2), plot this vs. beam current; expect an exp() function
- plot MIP height (minus baseline) vs. beam current
- multiply MIP height (minus baseline) from above with t_trig, plot this vs. beam current
- add 4 and 6 from above, do they agree with 1?
- check how much horizontal scaling is needed for the Shower histogram to match the 5 uA run (from Ye)
- does the scaling from 8 resembles the inverse of the values from 3 above? (make a comparison or plot)
- If possible, plot all above vs. background rate instead of beam current (but only if we have a reliable way to get the rate).
- suggest for rate comparison with beam-on-target simulation:
- Can we add a tiny Edep cut, rather than greater than zero?
- Can we possibly get this from random trigger FADC raw signals?
SPD timing
- Carter's slides
- need to add C-D data, perhaps check the timing propagation
