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Optical Transition Radiation Measurements of Pbar Transfers. Vic Scarpine Instrumentation Dept/AD. Optical Transition Radiation. OTR is generated when a charged-particle beam transits the interface of two media with different dielectric constants Surface phenomena
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Optical Transition Radiation Measurements of Pbar Transfers Vic Scarpine Instrumentation Dept/AD
Optical Transition Radiation OTR is generated when a charged-particle beam transits the interface of two media with different dielectric constants • Surface phenomena OTR detectors are primary beam instruments for electron machines • Far-field and Near-field imaging Fermilab has developed a generic OTR detector for proton and antiproton beams Near-field imaging Far-field imaging All Experiments Meeting
Proton/Pbar OTR Detectors at FNAL TeV OTR • Next to IPM • 150 GeV Proton & Pbar Injections A150 OTR • 150 GeV Pbars • Emittance AP1 OTR • Up to 8e12 120 GeV protons at ~0.5 Hz NuMI OTR • Up to ~4e13 120 GeV protons at ~0.5 Hz All Experiments Meeting
Pbar OTR Measurements in A150 Line • Two OTR detectors in A150 line • Can measure P and Pbar • Set for pbar now • 5 mm aluminized mylar at 45 degree angle to beam • Neutral density filters to adjust dynamic range • Fiducials on foils to set focus and scale/distortion All Experiments Meeting
Constructed OTR Detector • 5 mm mylar or kapton with ~1200 angstroms Aluminum • replaceable foils • Back illuminated fiducials for in-situ scale/orientation calibration All Experiments Meeting
A150 Line Beta Functions 903 902 All Experiments Meeting
OTR at 902 Location All Experiments Meeting
OTR Foil and Calibration All Experiments Meeting
Projections All Experiments Meeting