《user’smanualforelegant》

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1、User’sManualforelegantProgramVersion25.1.0AdvancedPhotonSourceMichaelBorlandOctober4,2012Note:anothersourceofhelpforelegantistheon-lineforum.Usersareencouragedtojoinandparticipate.Atminimum,usersshouldsubscribetothe“Bugs”topic,sincethisiswherebugnotificationsareposted.Contrary

2、topreviouspractise,wewillnolongerannouncebugsviaemail.Abriefoverviewofelegantisalsoavailable,whichintroducesthecapabilitiesatahigh-level.1HighlightsofWhat’sNewinVersion25.1Hereisasummaryofwhat’schangedsincerelease25.0:1.1BugFixesforElements•TherewasabugintheECOLelementwhenthe

3、lengthwasnonzeroandtheoffset(DXorDY)wasnonzero.Thiswasfixed.•Toavoidnumericalproblems,synchrotronradiationisnowdisabledautomaticallyforKSEXTelementsshorterthan1µmwhenperformingbeammomentscalculationswithradiation.•Insomecases,thematrixfortheMATRelementwouldnotgetloadedpriortotr

4、acking,resultinginacrash.Thiswasfixed.•Abugwasfixedinpost-adjustmentofsynchrotronradiationlossesintheCSRCSBENDelement,whichmadeextremelysmallerrorsintheresultsThiswasreportedbyK.Amyx(Tech-X).1.2BugFixesforCommands•DeterminationofthematrixfortheMAPSOLENOIDandTWMTAelementswasbrok

5、eninversion22.Thiswasfixed.1.3NewandModifiedElements•AddedtheCORGPIPEelement,whichimplementsabeamdechirperusingacorrugatedpipewakefield,basedonthetheoreticaltreatmentofK.Bane[38].ThiswassuggestedbyP.Emma(LBNL).•Ifnotsetbytheusers,theN_KICKSparameterofRFCAandRFCWwillnowbeautomati

6、callysetinordertoensureasufficientnumberofkicks,definedas100kicksperwavelength.Thismaybeexcessiveforhigh-energybeams.1•AutomaticselectionofthenumberofbinsandbinsizefortheWAKEelementwasmodifiedtoavoidwarningmessages.•TheEDRIFTelementcannowbesubdividedusingtheusualelementdivisionco

7、mmands.•TheCSRCSBENDelementwasimprovedtosupporttheintegratedGreen’sfunctionmethodforsteady-statewakes.ThiswasdonewiththeassistanceofR.Ryne(LBNL).•TheNIBENDelementnowallowspositioningofthefringeregionrelativetothereferenceplane.Thefringeregionmaybeinside,outside,orcenteredonth

8、ereferenceplane.ThiswasaddedafterdiscussionswithN.Nakamura(KEK).1.4N