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--- tuning_the_s800_xdt [2015/10/26 12:40]
pereira [Timing setup]
+++ tuning_the_s800_xdt [2015/10/26 13:21]
pereira [Timing setup]
@@ Line 162: / Line 162: @@
-  * Select SpecTcl window S800_TOF.win
+  * Select SpecTcl window **S800_TOF.win**
-      * The three columns correspond to the RF-FP ToF (left), OBJ-FP (center), and XFP-FP (right)
+      * The three columns correspond to the **RF-FP** ToF (left), **OBJ-FP** (center), and **XFP-FP** (right)
       * The first (top) row corresponds to the Phillips TDC
       * The second row corresponds to the MTDC with all the hits included
       * The third row corresponds to the MTDC with only the first hit
-      * The fourth row corresponds to the ORTEC TACs. Note that there is not RF-FP TAC
+      * The fourth row corresponds to the ORTEC TACs. Note that there is not **RF-FP TAC**
       * The two spectra in the fifth row corresponds to the MTDC summary spectra of OBJ-FP and XFP-FP ToFs (zoomed in). The spectra show the ToF (vertical axis) vs. hit number (horizontal axis). In an unreacted setting, one expects to see the most of the "good" ToF peak recorded in the first hit
       * An empty ToF spectrum means that either the delays are not right (and need to be adjusted) or the spectrum range is too narrow
@@ Line 174: / Line 174: @@
 {{:wiki:SpecTcl-e14019-run103.jpg?850|S800_ToF.win page}}
-  * Adjust delays for
+  * If necessary, adjust delays:
-  *
+      * Using ULM GUI assign TDC-start to one of the Inspect Trigger channels and trigger the scope with it
-  *
+      * Select the timing signals (Delay inspect channels) E1 up, OBJ and XFP with the Delay GUI and look at them in the scope
-   * Phillips TDC:
+      * Adjust the TDC delays of OBJ and XFP using the delay boxes connected to the CANBERRA CFD in data U6
+      * Adjust the TDC delays of E1 up, down using the Delay GUI
+      * In principle, the TACs delays don't need to be adjusted
-  * See [[http://groups.nscl.msu.edu/s800/Technical/Electronics/Electronics_frameset.htm]] for background information on the trigger setup
-  * The TDC delays can only be changed when the run control is stopped; must SAVE settings before starting run control not to overwrite adjustments being made
-  * The “S800” trigger is from E1 up signal
-  * Trigger the scope with the “Live Trigger” signal patched to data-U6
-      * There are 4 trigger inspect channels patched to data-U6 that can be assigned using the trigger GUI
-  * Examine the timing of each of the selectable listed signals with respect to the “Live Trigger” signal
-      * There are 4 TDC inspect channels patched to data-U6 that can be assigned using the trigger GUI
-      * The full range of the TDC is 400 ns
-      * Set each timing to 200 ns
-          * TDCs of last 4 listed signals (including XF and object scintillators) are bypassed with cable delays inside the vault and thus their delays cannot be controlled with the GUI
-          * They can be inspected, however using the GUI
-  * Information
-      * The signal delays controlled by the GUI (and not by cable delays) are not “pipelined” -– i.e., any new signals that arrive during the delay time of a previous signal are lost and thus deadtime is introduced into the system.  The signals delayed passively by cables are “pipelined” and thus are not subject to deadtime losses
-      * All of the trigger signals are not pipelined and are thus subject to deadtime
 ==== Checking Particle ID and rate at S800 FP ====

S800 Documentation

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