Gerrit BruhaugLee Teng Internship Presentations08/10/2016

The Design of a Resonance Control System for the IOTA RF Cavity

•  Overview of IOTA

•  Specifics of RF Cavity

•  Controls System Design and Theory

•  System Implementation and Results

•  Thanks and References

Presentation Content

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Integral Optics Test Accelerator (IOTA)

All pictures are provided by NML at Fermilab[1]

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Bunching and Modulation

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The IOTA Bunching Cavity

Drawing of IOTA Buncher1

•  Cavityhastwosec.ons•  2MHzsec.onbunches

protons•  30MHzsec.on

buncheselectronsandmodulatesprotons4

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PID Loops and Controls Theory

•  Proportional, Integral, Derivative

•  Used to prevent oscillations in controls systems

•  Origin can be traced back to 19th Centaury steam ship

controls3

PID Control Loop Equation2

Overview of PLC based RF Control SystemDiagram drawn with Gliffy graphics website

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System Implementation

Old Single Ceramic Break with One Stepper for Testing

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Mounting for Testing

Phase of RF Cavity with Untuned PID

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Live Test and ResultsPhase of RF Cavity with Tuned PID

Untuned PID Output Tuned PID Output

PhasePhase

StepsSteps

ClockTime

ClockTime

ClockTime

ClockTime

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References and Acknowledgments1.  NewMuonLab,Fermilab,

hHp://asta.fnal.gov/IOTA/IOTA_Parameters.pdf

2.  Automa.onDirect,Introduc.ontoPIDLoops,hHps://www.automa.ondirect.com/resources/microsites/videos/take_aways/VID_L_PC_P3K_005-Programming.pdf

3.  S.Bennet,“HistoricalPerspec.ve”,1993,hHp://www.ieeecss.org/CSM/library/1993/dec1993/w05-HistoricalPerspec.ves.pdf

4.  E.~Prebys,"RFCaptureofProtonstheIOTARingatFermilab",Batavia,Illinois,January2015

5.  G.~Kazakevich,K.~Carlson,"IOTACavi.esEngineering",Batavia,Illinois,December2015