Difference between revisions of "MagnetScan"

From PREX Wiki
Jump to: navigation, search
Line 7: Line 7:
 
* Adjust HV to get a good signal for 2 uA  
 
* Adjust HV to get a good signal for 2 uA  
 
* Compare signal on detector for new HV to normal HV
 
* Compare signal on detector for new HV to normal HV
* Detune spectrometer up in momentum.
+
* Detune spectrometer up in momentum.  All magnets adjusted.
 
* 1%, 2%, 4%, 7%, 10%, 15%, 20%, 25%
 
* 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.
 
* Note, Jack said the septum could go up but wasn't sure how high.  The septum power supply may limit us.

Revision as of 09:22, 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
  • Q2 scan +/- 2%, 5%, 10%
  • Septum scan: +/- 5%, 10%, 15%

Later to have a Geant4 model to try to understand these scans.