tuning_the_s800_xdt
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tuning_the_s800_xdt [2015/10/26 13:21] pereira [Timing setup] |
tuning_the_s800_xdt [2015/10/26 14:01] pereira |
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| * If necessary, adjust delays: | * If necessary, adjust delays: | ||
| - | * Using ULM GUI assign TDC-start to one of the Inspect Trigger channels and trigger the scope with it | + | * Using the [[S800 DAQ tools# |
| - | * Select the timing signals (Delay inspect channels) E1 up, OBJ and XFP with the Delay GUI and look at them in the scope | + | * Select the timing signals (Delay inspect channels) E1 up, OBJ and XFP with the [[S800 DAQ tools#Delay Window|Delay GUI]] and look at them in the scope |
| - | * 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 OBJ and XFP using the delay boxes connected to the CANBERRA CFD 454 in data U6 |
| * Adjust the TDC delays of E1 up, down using the Delay GUI | * Adjust the TDC delays of E1 up, down using the Delay GUI | ||
| * In principle, the TACs delays don't need to be adjusted | * In principle, the TACs delays don't need to be adjusted | ||
| ==== Checking Particle ID and rate at S800 FP ==== | ==== Checking Particle ID and rate at S800 FP ==== | ||
| - | | + | |
| - | * Refer to information on setting from A1900 FP | + | * Select SpecTcl window **S800_PID.win** in directory **/ |
| - | * dE-TOF | + | * The three columns correspond |
| - | | + | * The first (top) row corresponds to the Phillips TDC |
| - | | + | * The second row corresponds to the MTDC with just the first hit included |
| - | | + | * The third row corresponds |
| - | * Document | + | * You might need to adjust the limits of the spectra to get a good resolution |
| - | * Measure beam current with appropriate Faraday cups | + | |
| - | * Timed run | + | {{: |
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| + | * 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 | ||
| + | * 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 | ||
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| ==== Analysis line classic PPAC setup (Focus optics only) ==== | ==== Analysis line classic PPAC setup (Focus optics only) ==== | ||
| + | |||
| * " | * " | ||
| * Classic PPACs have rate limitations from pileups | * Classic PPACs have rate limitations from pileups | ||
| Line 218: | Line 237: | ||
| ==== Setup beamline ==== | ==== Setup beamline ==== | ||
| + | |||
| * Object and XF scintillators and intermediate image PPACs inserted if they will be used | * Object and XF scintillators and intermediate image PPACs inserted if they will be used | ||
| * If Object scintillator will not be used, there is no reason to look at beam on it unless to debug a problem with the transmission | * If Object scintillator will not be used, there is no reason to look at beam on it unless to debug a problem with the transmission | ||
| * Set spectrograph Brho for unreacted fragment | * Set spectrograph Brho for unreacted fragment | ||
| + | |||
| ==== Start scalers ==== | ==== Start scalers ==== | ||
| + | |||
| * Use s800 account | * Use s800 account | ||
| Line 240: | Line 262: | ||
| === Focused optics === | === Focused optics === | ||
| + | |||
| * Expectations for A1900 FP to S800 FP transmission | * Expectations for A1900 FP to S800 FP transmission | ||
| * 80% or better for mid-Z fragments | * 80% or better for mid-Z fragments | ||
| Line 255: | Line 278: | ||
| === Matched optics === | === Matched optics === | ||
| + | |||
| * Typically much more time is invested for optimizing optics for matched optics than for focused optics | * Typically much more time is invested for optimizing optics for matched optics than for focused optics | ||
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| ==== Setting up Reaction Settings ==== | ==== Setting up Reaction Settings ==== | ||
| + | |||
| * Calculating reaction setting | * Calculating reaction setting | ||
| * Center unreacted beam at S800 FP | * Center unreacted beam at S800 FP | ||
| Line 293: | Line 318: | ||
| ==== Coincidences ==== | ==== Coincidences ==== | ||
| + | |||
| * Overview | * Overview | ||
| * Most experiments at the S800 involve setting up an auxiliary detector system (e.g. SeGA, HiRA, etc) to be used in coincidence with the standard detectors of the S800. | * Most experiments at the S800 involve setting up an auxiliary detector system (e.g. SeGA, HiRA, etc) to be used in coincidence with the standard detectors of the S800. | ||
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| ====== Dispersion Matching tuning ====== | ====== Dispersion Matching tuning ====== | ||
| + | |||
| In the dispersion-matching optics, the S800 focal point is achromatic, i.e. the position of the beam in the dispersive direction does not depend on the momentum. As a consequence, | In the dispersion-matching optics, the S800 focal point is achromatic, i.e. the position of the beam in the dispersive direction does not depend on the momentum. As a consequence, | ||
tuning_the_s800_xdt.txt · Last modified: 2023/09/22 15:15 by swartzj
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