Improvements in LLRF Control Algorithms and Automation - Desy
Improvements in LLRF Control Algorithms and Automation - Desy
Improvements in LLRF Control Algorithms and Automation - Desy
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<strong>LLRF</strong> FSM: S<strong>in</strong>gle Pulse Identification<br />
What can be obta<strong>in</strong>ed from a s<strong>in</strong>gle pulse<br />
(3rd June 04, SP=14, no feedback, no beam)<br />
Ideally:<br />
Full system identification<br />
<strong>in</strong>clud<strong>in</strong>g non l<strong>in</strong>ear<br />
behaviour of all<br />
subsystems (slow, not<br />
completely achieved so<br />
far)<br />
Loop phase is obta<strong>in</strong>ed<br />
at the beg<strong>in</strong>n<strong>in</strong>g of the<br />
pulse<br />
Timeconstant gives<br />
b<strong>and</strong>width of the cavity,<br />
early quench <strong>in</strong>dicator<br />
Phase slope at the end<br />
of the pulse gives the<br />
detun<strong>in</strong>g<br />
Slope of feedforward<strong>and</strong><br />
probe-phase <strong>in</strong><br />
comb<strong>in</strong>ation give<br />
detun<strong>in</strong>g at the<br />
beg<strong>in</strong>n<strong>in</strong>g of the pulse<br />
fill<strong>in</strong>g time flattop klystron off<br />
Evaluation of LO<br />
Generation<br />
Determ<strong>in</strong>ation of<br />
offsets- <strong>and</strong> crosstalk<br />
parameters.<br />
September 7 th 2004 alex<strong>and</strong>er.br<strong>and</strong>t@desy.de 8/14
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