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tuning_the_s800_xdt [2015/10/25 16:29] pereira |
tuning_the_s800_xdt [2015/10/26 13:21] pereira [Timing setup] |
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==== Timing setup ==== | ==== Timing setup ==== | ||
+ | At present, there are three electronic " | ||
- | Overview: | ||
- | * There are three electronic " | + | * Select SpecTcl window **S800_TOF.win** |
- | * Although | + | * The three columns correspond to the **RF-FP** |
- | * Before going to the ToF modules, the OBJ and XFP signals are sent to a CANBERRA CFD 454 CFD in data U6 from the data-U6 patch panel (OBJ: patch panel #54, XFP: patch panel #1). (The exception is the OBJ signal into the MTDC) | + | * The first (top) row corresponds to the Phillips TDC |
- | * MTDC: | + | * The second row corresponds to the MTDC with all the hits included |
- | * Before getting into the MTDC, the OBJ, XFP, and E1 up signals in the MTDC go through a Mesytec MCFD | + | * The third row corresponds to the MTDC with only the first hit |
- | * The OBJ signal into the MCFD comes directly from the detector via S3 patch panel #94 (i.e., there is no signal to check in data U6) | + | * The fourth row corresponds to the ORTEC TACs. Note that there is not **RF-FP TAC** |
- | * The XFP signal into the MCFD module comes from data-U6 patch panel #70, connected | + | * The two spectra in the fifth row corresponds |
- | * SpecTcl calculates the OBJ-to-Focal-Plane | + | * An empty ToF spectrum means that either the delays are not right (and need to be adjusted) or the spectrum range is too narrow |
- | * The MTDC timing signals do not require external delay adjustments | + | * The MTDC spectra should never be empty because the matching window is sufficiently wide (around 4000 ns) |
- | * Tennelec TACs: | + | |
- | * The OBJ **stop** signal to the " | + | |
- | * The XFP **stop** signal to the " | + | |
- | * Phillips TDC: | + | {{:wiki:SpecTcl-e14019-run103.jpg? |
- | * The OBJ output signal from the CANBERRA 454 CFD is delayed with the low-noise delay boxes in data-U6, and sent to the TDC via patch panel #67 | + | |
- | * The XFP output signal from the CANBERRA 454 CFD is delayed with the low-noise delay boxes in data-U6, and sent to the TDC via patch panel #66 | + | |
- | * SpecTcl | + | |
- | | + | |
- | + | * Using ULM GUI assign | |
- | * Examine the timing of each of the selectable listed signals with respect to the “Live Trigger” signal | + | * Select |
- | * There are 4 TDC inspect channels patched to data-U6 that can be assigned using the trigger GUI | + | * Adjust |
- | * The full range of the TDC is 400 ns | + | * Adjust |
- | * Set each timing | + | * In principle, |
- | * TDCs of last 4 listed signals (including XF and object scintillators) are bypassed with cable delays inside | + | |
- | * They can be inspected, however using the GUI | + | |
- | + | ||
- | + | ||
- | * 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 | + | |
- | + | ||
- | * Trigger | + | |
- | * There are 4 trigger inspect channels patched to data-U6 that can be assigned using the trigger GUI | + | |
- | + | ||
- | * Examine | + | |
- | * There are 4 TDC inspect channels | + | |
- | * 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 | + | |
- | * They can be inspected, however using the GUI | + | |
- | + | ||
- | + | ||
- | | + | |
- | + | ||
- | * The TDC delays | + | |
- | + | ||
- | * 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 | + | |
- | + | ||
- | * Examine the timing of each of the selectable listed signals with respect | + | |
- | * 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 | + | |
- | + | ||
- | * 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. | + | |
- | * All of the trigger signals are not pipelined and are thus subject to deadtime | + | |
==== Checking Particle ID and rate at S800 FP ==== | ==== Checking Particle ID and rate at S800 FP ==== |