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tuning_the_s800_xdt [2015/10/26 12:33] pereira [Timing setup] |
tuning_the_s800_xdt [2015/10/26 13:57] pereira [Checking Particle ID and rate at S800 FP] |
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- | * Select SpecTcl window S800_TOF.win | + | * Select SpecTcl window |
- | | + | * The three columns correspond to the **RF-FP** ToF (left), |
- | * 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 first (top) row corresponds to the Phillips TDC | ||
* The second row corresponds to the MTDC with all the hits included | * 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 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 " | * 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 " | ||
+ | * 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 spectra should never be empty because the matching window is sufficiently wide (around 4000 ns) | ||
{{: | {{: | ||
- | * Although the ToF reference (" | + | * If necessary, adjust delays: |
- | * 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) | + | * Using the [[S800 DAQ tools# |
- | * MTDC: | + | * Select |
- | * Before getting into the MTDC, the OBJ, XFP, and E1 up signals | + | * Adjust the TDC delays of OBJ and XFP using the delay boxes connected to the CANBERRA |
- | * 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) | + | * Adjust |
- | * The XFP signal into the MCFD module comes from data-U6 patch panel #70, connected to the CANBERRA 454 CFD XFP output | + | * In principle, |
- | * SpecTcl calculates the OBJ-to-Focal-Plane and XFP-to-Focal-Plane ToFs by substracting | + | |
- | * The MTDC timing signals do not require external delay adjustments because | + | |
- | * Tennelec | + | |
- | * The OBJ **stop** signal | + | |
- | * The XFP **stop** signal to the " | + | |
- | * Phillips TDC: | + | ==== Checking Particle ID and rate at S800 FP ==== |
- | * The OBJ output signal from the CANBERRA 454 CFD is delayed with the low-noise delay boxes in data-U6, | + | |
- | * 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 calculates the OBJ-to-Focal-Plane and XFP-to-Focal-Plane ToFs by substracting the E1 up time (channel 8) to the OBJ time (channel 14) and the XFP time (channel 15) | + | |
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- | + | * The three columns correspond | |
- | | + | * The first (top) row corresponds to the Phillips |
- | | + | * The second row corresponds |
- | | + | * The third row corresponds to the ORTEC TACs. Note that there is not **RF-FP TAC** |
- | | + | * You might need to adjust the limits |
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- | * 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 | + | |
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- | * Trigger | + | |
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- | * There are 4 TDC inspect channels patched to data-U6 that can be assigned using the trigger GUI | + | |
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- | * TDCs of last 4 listed signals | + | |
- | * They can be inspected, however using the GUI | + | |
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- | * The full range of the TDC is 400 ns | + | |
- | * Set each timing | + | |
- | * 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 | + | |
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- | * Information | + | |
- | * The signal delays controlled by the GUI (and not by cable delays) are not “pipelined” -– i.e., any new signals | + | |
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- | ==== Checking Particle ID and rate at S800 FP ==== | + | |
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- | | + | |
- | * dE-TOF | + | |
- | * dE signal from Ion Chamber | + | |
- | * TOF from XF or Object scintillator | + | |
- | * Not necessary to implement dE- or TOF-based corrections | + | |
- | * Document rate of fragment of interest with run to disk | + | |
- | * Measure beam current with appropriate Faraday cups | + | |
- | * Timed run | + | |
+ | {{: | ||
+ | * Establish PID and measure rate | ||
+ | * Determine the blob that corresponds to the unreacted beam (refer to information on setting from A1900 FP) | ||
+ | * Take gates around the fragment of interest | ||
+ | * Measure the beam intensity the appropriate faraday cup | ||
+ | * Take a run on disk | ||
+ | * Measure the beam intensity again and calculate the average value | ||
+ | * In **[[s800 SpecTcl|SpecTcl GUI]], click **Attach to File** and select data file **run-xxxx-xx.evt** in directory **/ | ||
+ | * Check the run time and live time from the corresponding scaler file in directory **/ | ||
+ | * Calculate the rate and purity and compare with the value in the A1900 FP to determine the transmission | ||
==== Analysis line classic PPAC setup (Focus optics only) ==== | ==== Analysis line classic PPAC setup (Focus optics only) ==== | ||
* " | * " |