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--- tuning_the_s800_xdt [2015/10/21 16:09]
pereira
+++ tuning_the_s800_xdt [2015/10/21 16:50]
pereira [Unreacted beam]
@@ Line 57: / Line 57: @@
       * The OBJ signal feeding this module is not patched out to data U6
       * The OBJ signal from MCFD-16 module goes to the Mesytec MTDC32 module and scaler (channel OBJ.MCFD.Scint)
-      * Adjust CFD threshold looking at scalers. The ratio of OBJ to XFP scaler rates (channels OBJ.MCFD.Scint and XFP.MCFD.Scint) should reflect the transmission of the cocktail beam
+      * Make sure that the threshold of the XFP MCFD channel is reasonable. Rates in scaler channels XFP.Scint and XFP.MCFD.Scint should be comparable
+      * Adjust MCFD OBJ threshold looking at scalers. The ratio of OBJ to XFP scaler rates (channels OBJ.MCFD.Scint and XFP.MCFD.Scint) should reflect the transmission of the cocktail beam
       * Save new threshold in configuration file **MCFD16.tcl**
@@ Line 157: / Line 158: @@
 === Timing setup ===
+rview:
+  * There are three electronic "sources" with time information for ToF calculation: Tennelec TACs, Phillips TDC, and Mesytec MTDC. Although the "start" signal in these three sources is given by E1 up, the electronic path from the detector to the module is different
+  * MTDC:
+      * The OBJ and XFP signals comes from the MCFD module
+      * The OBJ signal into the MCFD comes from the detector via S3 patch panel #94 (going to the target area)
+      * The XFP signal into the MCFD module comes from data-U6 patch panel #70, which is connected to the CANBERRA 454 CFD XFP output in data U6
+      * The MTDC timing signals do not require external delay adjustments because the matching window is sufficiently wide
+  * Tennelec TACs:
+      * The OBJ and XFP signals do not go through the MCFD module
+      * The OBJ stop signal comes from data-U6 patch panel #62, which is connected to the CANBERRA 454 CFD OBJ output in data U6. The corresponding CFD input is connected to data-U6 patch panel #54
+      * The XFP stop signal comes from data-U6 patch panel #70, which is connected to the CANBERRA 454 CFD OBJ output in data U6. The corresponding CFD input receives the signal via patch panel to data U1
+      *
+      * the detector via S3 patch panel #94 (going to the target area)
+      * The XFP signal into the MCFD module comes from data-U6 patch panel #70, which is connected to the CANBERRA 454 CFD output in data U6
+      * The MTDC timing signals do not require external delay adjustments because the matching window is sufficiently wide
+  * Phillips TDC:
+      * The OBJ and XFP signals do not go through the MCFD module
+      * The OBJ stop signal comes from data-U6 patch panel #67.
+      *
+      * The XFP signal into the MCFD module comes from data-U6 patch panel #70, which is connected to the CANBERRA 454 CFD output in data U6
+      * The full range of the TACs and Phillips TDC is ~400 ns
+      *
   * See [[http://groups.nscl.msu.edu/s800/Technical/Electronics/Electronics_frameset.htm]] for background information on the trigger setup

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