| Autor: |
Bogacz, Alex, Boyce, Jim, Clarke, Jim, DOuglas, David, Hutton, Andrew, Krafft, Geoffrey, Merminga, Lia, Neil, George, Poole, Mike, Smith, Sue, Suller, Vic, Williams, Gwyn, Warwick, T. |
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| Zdroj: |
AIP Conference Proceedings; 2004, Vol. 705 Issue 1, p29-32, 4p |
| Abstrakt: |
A high brightness sub-picosecond x-ray source can be created by installing an undulator at Jefferson Lab’s CEBAF, a nuclear physics electron accelerator. Although the beam current is only 100 microamps, the electron beam has an extremely small emittance and energy spread, with the result that one can produce x-ray beams tunable over the range 5–30keV with an average brightness quite comparable to beamlines at the Advanced Photon Source (APS) at Argonne National Lab. In addition, with rms bunch lengths measured down to 85 fsecs, peak brightness values are much higher than at the APS. Furthermore, this x-ray source has similar emittance in both horizontal and vertical directions, (a so-called round beam) making it of very high potential for many applications. In order to determine if indeed such a source is worth pursuing we present “tuning curve” calculations of peak and average flux and brightness for an undulator on CEBAF. They are compared with similar calculations for a dipole and for undulator-A at the APS. Finally we calculate the impact of such a device on the CEBAF beam itself itself and find it to be much smaller than the natural energy spread of the beam. © 2004 American Institute of Physics [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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