tuning_the_s800_xdt
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tuning_the_s800_xdt [2015/10/26 13:56] pereira [Checking Particle ID and rate at S800 FP] |
tuning_the_s800_xdt [2015/10/26 14:02] pereira |
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| * 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 | ||
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| ==== Checking Particle ID and rate at S800 FP ==== | ==== Checking Particle ID and rate at S800 FP ==== | ||
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| * Take a run on disk | * Take a run on disk | ||
| * Measure the beam intensity again and calculate the average value | * Measure the beam intensity again and calculate the average value | ||
| - | * In SpecTcl GUI, click **Attach to File** and select data file **run-xxxx-xx.evt** in directory **/ | + | * 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 **/ | * 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 | * 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) ==== | ||
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| * " | * " | ||
| * Classic PPACs have rate limitations from pileups | * Classic PPACs have rate limitations from pileups | ||
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| ==== Setup beamline ==== | ==== Setup beamline ==== | ||
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| * 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 | ||
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| ==== Start scalers ==== | ==== Start scalers ==== | ||
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| * Use s800 account | * Use s800 account | ||
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| === Focused optics === | === Focused optics === | ||
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| * 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 | ||
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| === Matched optics === | === Matched optics === | ||
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| * 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 ==== | ||
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| * Calculating reaction setting | * Calculating reaction setting | ||
| * Center unreacted beam at S800 FP | * Center unreacted beam at S800 FP | ||
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| ==== Coincidences ==== | ==== Coincidences ==== | ||
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| * 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 ====== | ||
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| 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 ยท Last modified: 2023/09/22 15:15 by swartzj
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