001287895 001__ 1287895
001287895 003__ SzGeCERN
001287895 005__ 20240223164424.0
001287895 0248_ $$aoai:cds.cern.ch:1287895$$pcerncds:CERN$$pcerncds:CERN:FULLTEXT$$pcerncds:FULLTEXT
001287895 037__ $$aCERN-ATS-2010-193
001287895 041__ $$aeng
001287895 100__ $$aFox, JD$$uSLAC
001287895 245__ $$aSPS Ecloud Instabilities - Analysis of machine studies and implications for Ecloud Feedback
001287895 260__ $$c2010
001287895 269__ $$aGeneva$$bCERN$$c30 May 2010
001287895 300__ $$a4 p
001287895 520__ $$aThe SPS at high intensities exhibits transverse singlebunch instabilities with signatures consistent with an Ecloud driven instability.[1] We present recent MD data from the SPS, details of the instrument technique and spectral analysis methods which help reveal complex vertical motion that develops within a subset of the injected bunch trains. The beam motion is detected via wideband exponential taper striplines and delta-sigma hybrids. The raw sum and difference data is sampled at 50 GHz with 1.8 GHz bandwidth. Sliding window FFT techniques and RMS motion techniques show the development of large vertical tune shifts on portions of the bunch of nearly 0.025 from the base tune of 0.185. Results are presented via spectrograms and bunch slice trajectories to illustrate development of the unstable beam and time scale of development along the injected bunch train. The study shows that the growing unstable motion occupies a very broad frequency band of 1.2 GHz. These measurements are compared to numerical simulation results, and the system parameter implications for an Ecloud feedback system are outlined.
001287895 540__ $$3publication$$aCC-BY$$bJACoW
001287895 595__ $$aCERN EDS
001287895 595__ $$zCLAS1
001287895 65017 $$2SzGeCERN$$aAccelerators and Storage Rings
001287895 690C_ $$aCERN
001287895 690C_ $$aARTICLE
001287895 693__ $$aCERN SPS$$eNot applicable
001287895 700__ $$aBullitt, A$$uSLAC
001287895 700__ $$aMastorides, T$$uSLAC
001287895 700__ $$aNdabashimiye, G$$uSLAC
001287895 700__ $$aRivetta, C$$uSLAC
001287895 700__ $$aTurgut, O$$uSLAC
001287895 700__ $$aVan Winkle, D$$uSLAC
001287895 700__ $$aByrd, J$$uLBL, Berkeley
001287895 700__ $$aFurman, M$$uLBL, Berkeley
001287895 700__ $$aVay, JL$$uLBL, Berkeley
001287895 700__ $$aHofle, W$$uCERN
001287895 700__ $$aRumolo, S$$uCERN
001287895 700__ $$aDe Maria, R$$uBrookhaven
001287895 710__ $$5ATS
001287895 773__ $$qIPAC2010$$wC10-05-23
001287895 859__ [email protected]
001287895 8564_ $$uhttps://accelconf.web.cern.ch/IPAC10/papers/WEPEB052.pdf$$yPublished version from JACoW
001287895 8564_ $$uhttps://cds.cern.ch/record/1287895/files/CERN-ATS-2010-193.pdf
001287895 916__ $$sn$$w201035$$ya2010
001287895 960__ $$a13
001287895 961__ $$c20110202$$h1509$$lCER01$$x20100831
001287895 962__ $$b1208994$$kWEPEB052$$nkyoto20100523
001287895 963__ $$aPUBLIC
001287895 970__ $$a000709563CER
001287895 980__ $$aARTICLE
001287895 980__ $$aConferencePaper