Difference between revisions of "MagnetScan"

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* Counting mode.
 
* Counting mode.
 
* 20 nA on Lead
 
* 20 nA on Lead
 +
** 200k events per run
 +
** GEMs ON
 +
** sieve IN and sieve OUT;
  
* Q2 scan +/- 2%, 5%, 10%
+
* Q2 scan 0%; +15% to -25% in steps of 5;
 
+
* Septum scan: +/- 5%, 10%, 15%
+
 
+
* Do we already have these data from earlier in the experiment ?
+
Later to have a Geant4 model to try to understand these scans.
+

Latest revision as of 16:16, 29 August 2019

Magnet scan for rescattering and poletip. (Proposal)

== Rescattering

  • Integrating mode
  • 2 uA (to be safe) on Lead
  • Adjust HV to get a good signal for 2 uA
  • Compare signal on detector for new HV to normal HV
  • Detune spectrometer up in momentum. All magnets adjusted.
  • 1%, 2%, 4%, 7%, 10%, 15%, 20%, 25%
  • Note, Jack said the septum could go up but wasn't sure how high. The septum power supply may limit us.
  • A scan down may be considered. Motivation is for poletip scattering and just in general to understand the HRS.
  • Same conditions as above.
  • -1%, -2%, -4%, -7%, -10% (negative)

== Poletip Scan

  • Start with all magnets at tune P (nominal).
  • Counting mode.
  • 20 nA on Lead
    • 200k events per run
    • GEMs ON
    • sieve IN and sieve OUT;
  • Q2 scan 0%; +15% to -25% in steps of 5;