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dc.contributor.authorAlarcon, R.
dc.contributor.authorBalascuta, S.
dc.contributor.authorBenson, S.V.
dc.contributor.authorBoyce, J. R.
dc.contributor.authorDouglas, D.
dc.contributor.authorEvtushenko, P.
dc.contributor.authorKalantarians, N.
dc.contributor.authorKossler, W. J.
dc.contributor.authorLegg, R.
dc.contributor.authorLong, E.
dc.contributor.authorNeil, G. R.
dc.contributor.authorTennant, C.
dc.contributor.authorWilliams, G. P.
dc.contributor.authorZhang, S.
dc.contributor.authorBertozzi, William
dc.contributor.authorCowan, Ray Franklin
dc.contributor.authorFisher, Peter H.
dc.contributor.authorIhloff, Ernest E.
dc.contributor.authorKelleher, Aidan
dc.contributor.authorMilner, Richard G.
dc.contributor.authorOu, Longwu
dc.contributor.authorSchmookler, Barak Abraham
dc.contributor.authorTschalar, Christoph
dc.date.accessioned2016-04-08T15:10:12Z
dc.date.available2016-04-08T15:10:12Z
dc.date.issued2013-07
dc.date.submitted2013-05
dc.identifier.issn01689002
dc.identifier.urihttp://hdl.handle.net/1721.1/102207
dc.description.abstractWe report measurements of photon and neutron radiation levels observed while transmitting a 0.43 MW electron beam through millimeter-sized apertures and during beam-off, but accelerating gradient RF-on, operation. These measurements were conducted at the Free-Electron Laser (FEL) facility of the Jefferson National Accelerator Laboratory (JLab) using a 100 mev electron beam from an energy-recovery linear accelerator. The beam was directed successively through 6 mm, 4 mm, and 2 mm diameter apertures of length 127 mm in aluminum at a maximum current of 4.3 mA (430 kW beam power). This study was conducted to characterize radiation levels for experiments that need to operate in this environment, such as the proposed DarkLight Experiment. We find that sustained transmission of a 430 kW continuous-wave (CW) beam through a 2 mm aperture is feasible with manageable beam-related backgrounds. We also find that during beam-off, RF-on operation, multipactoring inside the niobium cavities of the accelerator cryomodules is the primary source of ambient radiation when the machine is tuned for 130 mev operation.en_US
dc.description.sponsorshipUnited States. Dept. of Energy. Office of Scienceen_US
dc.language.isoen_US
dc.publisherElsevieren_US
dc.relation.isversionofhttp://dx.doi.org/10.1016/j.nima.2013.06.042en_US
dc.rightsCreative Commons Attribution-Noncommercial-NoDerivativesen_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en_US
dc.sourceArxiven_US
dc.titleMeasured radiation and background levels during transmission of megawatt electron beams through millimeter aperturesen_US
dc.typeArticleen_US
dc.identifier.citationAlarcon, R., S. Balascuta, S.V. Benson, W. Bertozzi, J.R. Boyce, R. Cowan, D. Douglas, et al. “Measured Radiation and Background Levels During Transmission of Megawatt Electron Beams through Millimeter Apertures.” Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 729 (November 2013): 233–240.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Physicsen_US
dc.contributor.departmentMassachusetts Institute of Technology. Laboratory for Nuclear Scienceen_US
dc.contributor.mitauthorBertozzi, Williamen_US
dc.contributor.mitauthorCowan, Ray Franklinen_US
dc.contributor.mitauthorFisher, Peter H.en_US
dc.contributor.mitauthorIhloff, Ernest E.en_US
dc.contributor.mitauthorKelleher, Aidanen_US
dc.contributor.mitauthorMilner, Richard G.en_US
dc.contributor.mitauthorOu, Longwuen_US
dc.contributor.mitauthorSchmookler, Barak Abrahamen_US
dc.contributor.mitauthorTschalar, Christophen_US
dc.relation.journalNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipmenten_US
dc.eprint.versionAuthor's final manuscripten_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsAlarcon, R.; Balascuta, S.; Benson, S.V.; Bertozzi, W.; Boyce, J.R.; Cowan, R.; Douglas, D.; Evtushenko, P.; Fisher, P.; Ihloff, E.; Kalantarians, N.; Kelleher, A.; Kossler, W.J.; Legg, R.; Long, E.; Milner, R.G.; Neil, G.R.; Ou, L.; Schmookler, B.; Tennant, C.; Tschalär, C.; Williams, G.P.; Zhang, S.en_US
dc.identifier.orcidhttps://orcid.org/0000-0002-4876-7716
dc.identifier.orcidhttps://orcid.org/0000-0002-0031-1963
dc.identifier.orcidhttps://orcid.org/0000-0003-2713-7800
dc.identifier.orcidhttps://orcid.org/0000-0001-6770-4908
dc.identifier.orcidhttps://orcid.org/0000-0002-6337-331X
dc.identifier.orcidhttps://orcid.org/0000-0002-8667-5660
mit.licensePUBLISHER_CCen_US


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