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tuning_the_s800_xdt [2015/10/21 13:55]
pereira
tuning_the_s800_xdt [2015/10/21 14:03]
pereira
Line 13: Line 13:
 === 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
 +
 +  * Verify that the beam blocker (labeled I255 Slits) in the S3 page of Barney is open:
 +      * Expected "open" values for top and bottom slits are CT ~6.8 and CB ~3.2, respectively 
  
   * Ensure that CRAD04 (typically connected to object scintillator) is enabled with a rate limit of **20 kHz** (CRAD04 looks at E1 up FP scintillator)   * Ensure that CRAD04 (typically connected to object scintillator) is enabled with a rate limit of **20 kHz** (CRAD04 looks at E1 up FP scintillator)
Line 108: Line 111:
           * Patched to data-U6 on labeled connector           * Patched to data-U6 on labeled connector
           * **200 – 500 mV** signals are good           * **200 – 500 mV** signals are good
 +          * CRDC1 anode is noisier (digital noise) than CRDC2 
       * Bias CRDC1 and CRDC2. Typical starting values:       * Bias CRDC1 and CRDC2. Typical starting values:
           * For He-3 @ ~130 MeV/u: CRDC1 (Anode=1120 V, Drift=1000 V); CRDC2 (Anode=1120 V; Drift=1000 V)           * For He-3 @ ~130 MeV/u: CRDC1 (Anode=1120 V, Drift=1000 V); CRDC2 (Anode=1120 V; Drift=1000 V)
tuning_the_s800_xdt.txt · Last modified: 2023/09/22 15:15 by swartzj