Author: Ziemann, V.G.
Paper Title Page
MOPWA038 Flashbox Compact Beam Spectrometer and its Application to the High-gradient Acceleration Study 753
 
  • A. Dubrovskiy, F. Tecker
    CERN, Geneva, Switzerland
  • M. Jacewicz, R.J.M.Y. Ruber, V.G. Ziemann
    Uppsala University, Uppsala, Sweden
  
  A Flash­box com­pact spec­trom­e­ter has been de­vel­oped for the Two-beam Test Stand (TBTS), which is a part of the CLIC test fa­cil­ity CTF3 at CERN. It is used to study lim­i­ta­tions of high-gra­di­ent ac­cel­er­a­tion in X-band struc­tures being pro­to­typed in the TBTS. The Flash­box is built around the beam tube such that an elec­tron beam can pass to be ac­cel­er­ated in the X-band struc­ture while charged par­ti­cles emit­ted from the ac­cel­er­at­ing struc­ture can be in­ter­cepted on the spec­trom­e­ter con­sist­ing of de­tec­tor plates aligned along the beam axis in com­bi­na­tion with mag­netic and elec­tric fields. The Flash­box has made it pos­si­ble to iden­tify elec­trons and ions emit­ted by the ac­cel­er­at­ing struc­ture dur­ing RF break­down. We de­scribe the Flash­box and first re­sults.  
 
WEPEA067 Beam Optics Measurements through Turn by turn Beam Position Data in the SLS 2663
 
  • P. Zisopoulos, Y. Papaphilippou
    CERN, Geneva, Switzerland
  • A. Streun
    PSI, Villigen PSI, Switzerland
  • V.G. Ziemann
    Uppsala University, Uppsala, Sweden
  
  Re­fined Fourier analy­sis of turn-by-turn (TBT) trans­verse po­si­tion data mea­sure­ments can be used for de­ter­min­ing sev­eral beam prop­er­ties of a ring, such as trans­verse tunes, op­tics func­tions, phases, chro­matic prop­er­ties and cou­pling. In par­tic­u­lar, the Nu­mer­i­cal Analy­sis of Fun­da­men­tal Fre­quen­cies (NAFF) al­go­rithm is used to an­a­lyze TBT data from the Swiss Light Source (SLS) stor­age ring in order to es­ti­mate on and off-mo­men­tum beam char­ac­ter­is­tics. Of par­tic­u­lar in­ter­est is the po­ten­tial of using the full po­si­tion in­for­ma­tion within one turn in order to mea­sure beam op­tics prop­er­ties.