tuning_the_s800_xdt
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tuning_the_s800_xdt [2015/10/25 16:27] pereira |
tuning_the_s800_xdt [2015/10/26 12:40] pereira [Timing setup] |
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| - | === Send beam to FP === | + | ==== Send beam to FP ==== |
| * Ensure that the S800 spectrograph magnets are tuned to the right rigidity | * Ensure that the S800 spectrograph magnets are tuned to the right rigidity | ||
| Line 40: | Line 40: | ||
| - | === Object scintillator setup === | + | ==== Object scintillator setup ==== |
| * Bias detector. Typical bias: **1200-1800 V** (up to 2200 V) | * Bias detector. Typical bias: **1200-1800 V** (up to 2200 V) | ||
| Line 65: | Line 65: | ||
| * Watch for no rate change on scaler display with a bias adjustment up or down of about 50-100 V | * Watch for no rate change on scaler display with a bias adjustment up or down of about 50-100 V | ||
| - | === FP scintillator setup === | + | ==== FP scintillator setup ==== |
| * Set trigger to “s800 trigger” | * Set trigger to “s800 trigger” | ||
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| - | === Ionization Chamber setup === | + | ==== Ionization Chamber setup ==== |
| * Gas should be [[Gas handling system# | * Gas should be [[Gas handling system# | ||
| Line 108: | Line 108: | ||
| - | === CRDCs setup === | + | ==== CRDCs setup ==== |
| * **[[hv bias#hv remote control|Bias]]** CRDCs | * **[[hv bias#hv remote control|Bias]]** CRDCs | ||
| Line 158: | Line 158: | ||
| - | === 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 ToF (left), OBJ-FP (center), and XFP-FP (right) |
| - | * 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 | + | |
| - | | + | |
| - | + | * | |
| - | * 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 | + | |
| - | * 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 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 | + | |
| Line 223: | Line 200: | ||
| * All of the trigger signals are not pipelined and are thus subject to deadtime | * 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 ==== |
| * Establish PID | * Establish PID | ||
| * Refer to information on setting from A1900 FP | * Refer to information on setting from A1900 FP | ||
| Line 236: | Line 213: | ||
| - | === 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 259: | Line 236: | ||
| - | === 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 | ||
| Line 265: | Line 242: | ||
| * Set spectrograph Brho for unreacted fragment | * Set spectrograph Brho for unreacted fragment | ||
| - | === Start scalers === | + | ==== Start scalers |
| * Use s800 account | * Use s800 account | ||
| Line 279: | Line 256: | ||
| * scalers (gives error if no bridge) | * scalers (gives error if no bridge) | ||
| - | === Setting Optimization === | + | ==== Setting Optimization |
| === Focused optics === | === Focused optics === | ||
tuning_the_s800_xdt.txt · Last modified: 2023/09/22 15:15 by swartzj
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