S800 Documentation

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tuning_the_s800_xdt [2015/10/26 14:14]
pereira [Setting Optimization] 		tuning_the_s800_xdt [2015/10/26 14:19]
pereira [Dispersion Matching tuning]
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       * Want to balance losses between S800 analysis line and Transfer Hall (the S800 analysis line is typically slightly worse)       * Want to balance losses between S800 analysis line and Transfer Hall (the S800 analysis line is typically slightly worse)
       * Best diagnostic is scalers from S800 FP, object scintillator and XF scintillator       * Best diagnostic is scalers from S800 FP, object scintillator and XF scintillator
-      * Using knob box and Tweak y-quads (while watching scalers) in front of dipole gaps (this works both for Transfer Hall and analysis line); choose elements that have biggest effect with smallest ratio change+      * Using the knob box and the NCS application **QtKM** (file **BLSetup_A1900.gkm**), tweak y-quads (while watching scalers) in front of dipole gaps (this works both for Transfer Hall and analysis line); choose elements that have biggest effect with smallest ratio change
  
   * Document optimized transmission with another run to disk to measure rate of fragment of interest at S800 FP   * Document optimized transmission with another run to disk to measure rate of fragment of interest at S800 FP
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-====== Dispersion Matching tuning ======+====== Dispersion Matching Mode ======
  
 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, the beam is momentum-dispersed on the target area (pivot point) with a dispersion of about 10 cm/%. The main goal of the tuning is to ensure that the position and angle dispersion are cancelled at the focal plane, thus maximizing the resolution at that point. We also want a good image in the object position, which will also contribute to increase the resolution at the focal plane.  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, the beam is momentum-dispersed on the target area (pivot point) with a dispersion of about 10 cm/%. The main goal of the tuning is to ensure that the position and angle dispersion are cancelled at the focal plane, thus maximizing the resolution at that point. We also want a good image in the object position, which will also contribute to increase the resolution at the focal plane. 
tuning_the_s800_xdt.txt ยท Last modified: 2023/09/22 15:15 by swartzj

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