Difference between revisions of "SoLID Ecal Weekly 20230818"
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=Rate discussion= | =Rate discussion= | ||
| − | *Mike's slides | + | *Mike's slides on MIP shift (integral) |
| − | *Ye's slides | + | *Ye's slides on MIP and baseline shift (height), and expected rate of low-energy background in ECal from beam-on-target simulation |
| − | *suggest: decompose "Total MIP peak integral" = "baseline \times timing window width" + "MIP peak height - baseline" \times "timing window width" / 2. Plot all on one graph. Does | + | *suggest: |
| + | **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 | ||
| + | ### | ||
| + | ***If possible, plot all above vs. background rate instead of beam current (but only if we have a reliable way to get the rate). | ||
| + | |||
| + | **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? | ||
| + | |||
| + | "Total MIP peak integral" = "baseline \times timing window width" + "MIP peak height - baseline" \times "timing window width" / 2. Plot each one per graph, then all on one graph. Does the equation work? | ||
| + | ** | ||
=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 22:47, 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:
- 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
- If possible, plot all above vs. background rate instead of beam current (but only if we have a reliable way to get the rate).
- 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?
- For rate comparison with beam-on-target simulation:
"Total MIP peak integral" = "baseline \times timing window width" + "MIP peak height - baseline" \times "timing window width" / 2. Plot each one per graph, then all on one graph. Does the equation work?
SPD timing
- Carter's slides
- need to add C-D data, perhaps check the timing propagation
