Merge pull request #645 from SBNSoftware/feature/jzennamo_updateclock

Updating Clock to the New Porch Size

Author: bear-is-asleep

sbndcode/Utilities/detectorclocks_sbnd.fcl

@@ -13,7 +13,7 @@ sbnd_detectorclocks: @local::standard_detectorclocks
 
 sbnd_detectorclocks.TrigModuleName:     "triggersim"
 sbnd_detectorclocks.InheritClockConfig: true
-sbnd_detectorclocks.TriggerOffsetTPC:   -0.2e3  # Time [us] for TPC readout start w.r.t. trigger time
+sbnd_detectorclocks.TriggerOffsetTPC:   -0.205e3  # Time [us] for TPC readout start w.r.t. trigger time
 sbnd_detectorclocks.FramePeriod:        1.3e3   # Frame period [us]
 sbnd_detectorclocks.ClockSpeedTPC:      2.      # TPC clock speed in MHz
 sbnd_detectorclocks.ClockSpeedOptical:  500.    # Optical clock speed in MHz

sbndcode/WireCell/cfg/pgrapher/common/params.jsonnet

@@ -156,6 +156,11 @@ local wc = import "wirecell.jsonnet";
     // Parameters related to simulation, not given elsewhere.
     sim : {
 
+        // The "absolute" time (ie, relative to trigger time?) that the lower edge
+        // of final readout tick #0 should correspond to.  This is a
+        // "fixed" notion.
+        tick0_time: 0,
+
         // The number of impact bins per wire region gives the
         // granularity of the simulation convolution in the transverse
         // dimension.  Typically should match what the granularity at

sbndcode/WireCell/cfg/pgrapher/experiment/sbnd/params.jsonnet

@@ -121,9 +121,9 @@ base {
         fixed: true,
 
         // The "absolute" time (ie, relative to trigger time?) that the lower edge
-        // of final readout tick #0 should correspond to.  This is a
-        // "fixed" notion.
-        local tick0_time = -205*wc.us, // updated in January 2025, front porch in data = 410 ticks
+        // of final readout tick #0 should correspond to.
+        // this is the default value unless overridden with extVar in main
+        tick0_time: -205 * wc.us,
 
         // Open the ductor's gate a bit early.
         local response_time_offset = $.det.response_plane / $.lar.drift_speed,
@@ -132,7 +132,7 @@ base {
         ductor : {
             nticks: $.daq.nticks + response_nticks,
             readout_time: self.nticks * $.daq.tick,
-            start_time: tick0_time - response_time_offset,
+            start_time: $.sim.tick0_time - response_time_offset,
         },
 
         // To counter the enlarged duration of the ductor, a Reframer

sbndcode/WireCell/cfg/pgrapher/experiment/sbnd/wcls-sim-drift-depoflux-nf-sp.jsonnet

@@ -28,6 +28,10 @@ local params = base {
     // Electron drift speed, assumes a certain applied E-field
     drift_speed: std.extVar('driftSpeed') * wc.mm / wc.us,
   },
+  sim: super.sim {
+    // front porch size [us]
+    tick0_time: std.extVar('tick0_time') * wc.us,
+  }
 };
 
 local tools = tools_maker(params);

sbndcode/WireCell/wcsimsp_sbnd.fcl

@@ -1,3 +1,4 @@
+#include "detectorclocks_sbnd.fcl"
 BEGIN_PROLOG
 
 sbnd_wcls: { 
@@ -68,6 +69,8 @@ sbnd_wcls_simsp.wcls_main.structs:  {
                                      lifetime: 100.0
                                      ## Electron drift speed, assumes 0.5 kV/cm and 88.4 K. Units: mm/us
                                      driftSpeed: 1.563
+                                     ## simulated front porch size [us]
+                                     tick0_time: @local::sbnd_detectorclocks.TriggerOffsetTPC
                                     }
 
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