| Autor: |
J.P. Laget, S. Joly, A. Loulergue, P. Balleyguier, S. Striby, F. Schumann, G. Haouat, F. Sabary, P. Fourdin, J.-L. Coacolo, D.H. Dowell, Ch. Couillaud, J. Raimbourg, J. Frehaut, J.P. De Brion, J. Di Crescenzo |
| Rok vydání: |
1994 |
| Předmět: |
|
| Zdroj: |
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 341:386-390 |
| ISSN: |
0168-9002 |
| DOI: |
10.1016/0168-9002(94)90388-3 |
| Popis: |
A non-isochronous beam transport system can be used to reduce the pulse length of an electron beam with a proper correlation in energy and time. By performing magnetic bunching at relativistic beam energies a high-peak current is achieved while the emittance growth due to space charge forces is minimized. When combined with an rf-gun photocathode injector, magnetic bunching has the potential to produce an electron beam with a low transverse emittance and a high-peak current necessary for efficient free-electron laser operation. The ELSA rf photocathode accelerator beam line contains a 180°, three dipole, non-isochronous bend which has been used to bunch the electron beam. A compression factor of 3 has been achieved in preliminary tests. Pulse length measurements over a range of compression factors can provide the longitudinal emittance using an emittance analysis technique similar to that for the transverse emittance. Experimental results of beam bunching, longitudinal and transverse emittances and a discussion of beam brightness are presented. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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