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| Home > Publications database > Emittance Growth and Energy Loss Due to Coherent Synchrotron Radiation in the Bunch Compressor of the CLIC Test Facility (CTF II) |
| Home > Publications database > Emittance Growth and Energy Loss Due to Coherent Synchrotron Radiation in the Bunch Compressor of the CLIC Test Facility (CTF II) |
| Report/Contribution to a conference proceedings | PUBDB-2016-02924 |
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2000
DESY
Hamburg
Report No.: CERN-CLIC-NOTE-438; CERN-PS-2000-034-AE; CLIC-NOTE-438; DESY-M-00-04P; SLAC-REPRINT-2000-052
Abstract: Bunches of high charge (10 nC) are compressed in length in the CTF II bunch compressor from 1.2 mm rms to less than 0.4 mm. The short bunches start to radiate coherently, thus affecting the horizontal and longitudinal phase spaces of the beam. This paper reports the results of measurements and simulations concerning the increase of the beam emittance and the impact on the energy distribution. Beam emittances were measured for different bunch compression factors and bunch charges. For each compressor setting, the energy spectrum of the beam was recorded in order to measure the energy loss due to coherent synchrotron radiation. For bunch charges of 10 nC a maximum increase of the horizontal emittance of 50% was observed at full compression, while the mean beam energy decreased by 5% from 39 MeV to 37 MeV. Both effects were correlated with an increase of the energy spread from 2.3% to 8.5% rms. The experimental results are compared with simulations.
Keyword(s): talk: Vienna 2000/06/26 ; electron positron: linear collider ; linear collider: proposed ; accelerator: two-beam ; synchrotron radiation: coherence ; bunching: length ; bending magnet ; beam emittance: enhancement ; beam: energy loss ; CERN Lab
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