2000
DOI: 10.1103/physrevlett.84.658
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Emittance Growth during Bunch Compression in the CTF-II

Abstract: Measurements of the beam emittance during bunch compression in the CLIC Test Facility (CTF-II) are described. The measurements were made with different beam charges and different energy correlations versus the bunch compressor settings which were varied from no compression through the point of full compression and to overcompression. Significant increases in the beam emittance were observed with the maximum emittance occurring near the point of full (maximal) compression. Finally, evaluation of possible emitta… Show more

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Cited by 43 publications
(35 citation statements)
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“…As a bunch propagates through the bends of a magnetic bunch compressor, the tail-head interaction due to CSR induces increased beam energy spread and transverse emittance dilution that can degrade the downstream FEL performance [1][2][3]. In addition, the CSR interaction is known to generate a microbunching instability in which large-amplitude current modulations can grow from small-amplitude, shortwavelength variations in the initial current profile [4,5].…”
Section: Introductionmentioning
confidence: 99%
“…As a bunch propagates through the bends of a magnetic bunch compressor, the tail-head interaction due to CSR induces increased beam energy spread and transverse emittance dilution that can degrade the downstream FEL performance [1][2][3]. In addition, the CSR interaction is known to generate a microbunching instability in which large-amplitude current modulations can grow from small-amplitude, shortwavelength variations in the initial current profile [4,5].…”
Section: Introductionmentioning
confidence: 99%
“…On the other hand, it is clear that the beam emittance " does not decrease during compression; it can be at best constant, and may indeed increase due to collective effects [20,21] such as coherent synchrotron radiation. If one assumes that the beam emittance is held constant during compression, and that the beam is injected in a matched fashion to the ion focusing, then the normalized transverse beam size scales~r k p eq " p / k p p .…”
Section: Experimental Scaling With a Gaussian Beam-plasma Systemmentioning
confidence: 99%
“…Otherwise, in the arcs even a partially compressed beam with peak current of a few hundred amps would experience severe emittance growth caused by coherent synchrotron radiation (CSR) [13][14][15]. In such a scheme, the CSR originating from the strong compressors could greatly degrade the quality of the e-beam [16][17][18].…”
Section: Introductionmentioning
confidence: 99%