User Tools

Site Tools


rt_improvement_by_post-processing

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
rt_improvement_by_post-processing [2019/02/06 13:57]
vschaefer [Bunch Charge Determination]
rt_improvement_by_post-processing [2019/02/06 16:11] (current)
vschaefer [Basic Principle]
Line 12: Line 12:
 <color #ed1c24>-> insufficient e.g. for transmission control</color> <color #ed1c24>-> insufficient e.g. for transmission control</color>
  
-{{:bild_zu_basic_principle.png?direct&400|}}+===== Bunch Charge determination =====
  
-===== Post-Processing of RT Oscillation Data =====+{{:bunch_charge_determination.png?direct&400|}}
  
-  * idearesonant frequency ω0 and decay time constant λare fixed by hardware +[from"A High Stability Intensity Monitoring System"M.A. Clarke-GaytherRAL, Didcot (UK), presented on EPAC, Sitges (E) 1996]
-  * omission of inexact peak detector +
-<color #ed1c24>-> improved RT resolution by digitization of oscillation dataFFT filtering and envelope fit  +
-</color>+
  
-**Algorithm for bunch charge Determination:** +{{:bild_zu_basic_principle.png?direct&400|}}
-  * FFT filtering and offset correction +
-  * identification of maxima and minima until pre-set S/N value crossed +
-  * robust estimator of exponential decay curve +
-  * evaluation of amplitude ~ total pulse charge+
  
-===== Bunch Charge Determination =====+{{:bild_zu_bunch_charge.png?direct&400|}}
  
-{{::bunch_charge_determination.png?direct&400|}}+<color #7092be>Courtesy of AReiter</color>
  
-[from: “A High Stability Intensity Monitoring System”, M. A. Clarke-Gayther, RAL, Didcot (UK), presented on EPAC, Sitges (E) 1996]+===== Post-Processing of RT Oscillation Data =====
  
-{{::bild_zu_bunch_charge.png?direct&400|}}+  * idea: : resonant frequency ω0 and decay time constant λ, are fixed by hardware 
 +  * omission of inexact peak detector 
 +  <color #ed1c24>-> improved RT resolution by digitization of oscillation data, FFT filtering and envelope fit </color>  
  
-<color #7092be>Courtesy of A. Reiter</color>+==== Algorithm for bunch charge determination ====
  
-{{::bild1.png?direct&400|}}+  * FFT filtering and offset correction 
 +  * identification of maxima and minima until preset S/N value crossed 
 +  * robust estimator of exponential decay curve  
 +  * evaluation of amplitude ~ total pulse charge
  
 +{{:bild1.png?direct&400|}}
  
rt_improvement_by_post-processing.1549457878.txt.gz · Last modified: 2019/02/06 13:57 by vschaefer