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Title |
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| THPLT130 |
Synchronization of the Fermilab Booster and Main Injector for Multiple Batch Injection
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2768 |
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- R.M. Zwaska, S.E. Kopp
The University of Texas at Austin, Austin, Texas
- W. Pellico, R.C. Webber
Fermilab, Batavia, Illinois
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To date, the 120 GeV Fermilab Main Injector accelerator has accelerated a single batch of protons from the 8 GeV rapid-cycling Booster synchrotron for production of antiprotons for Run II. In the future, the Main Injector must accelerate 6 or more Booster batches simultaneously; the first will be extracted to the antiproton source, while the remaining are extracted for the NuMI/MINOS neutrino experiment. Performing this multi-batch operation while avoiding unacceptable radioactivation of the beamlines requires a previously unnecessary synchronization between the accelerators. We describe a mechanism and present results of advancing or retarding the longitudinal progress of the Booster beam by active feedback radial manipulation of the beam during the acceleration period.
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| THPLT129 |
Ion Chambers for Monitoring the NuMI Beam at FNAL
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2765 |
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- S.E. Kopp, D. Indurthy, R. Keisler, S. Mendoza, Z. Pavlovich, M. Proga, R.M. Zwaska
The University of Texas at Austin, Austin, Texas
- M. Diwan, B. Viren
BNL, Upton, Long Island, New York
- A.R. Erwin, H.P. Ping, C.V. Velisaris
UW-Madison/PD, Madison
- D. Harris, A. Marchionni, J. Morfin
Fermilab, Batavia, Illinois
- J. McDonald, D. Naples, D. Northacker
University of Pittsburgh, Pittsburgh, Pennsylvania
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We summarize selected instrumentation under construction for the NuMI neutrino beam facility at Fermilab. An array of foil secondary emission monitors (SEM's) will measure the 120GeV proton beam position, profile and halo at 10 stations along the transport to the NuMI target. The final two foil SEM's align the proton beam to within 50 microns on target. These are capable of withstanding the 400kW proton beam and causing <5·10-6 beam loss. Further instrumentation includes four stations of ionization chambers located downstream of the decay volume, one upstream and three downstream of the beam dump. The latter three monitor the tertiary muon beam, the first monitors the remnant hadron beam. The ion chamber arrays align the proton beam to 14microRadian and the neutrino beam to within 50 microRadian, as well as monitoring flux to better than 1%. The ion chambers are designed to withstand the ~1GRad doses and 109 particle/cm2/spill fluxes anticipated during NuMI beam operations. Beam tests and R&D efforts are discussed.
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