000207483 001__ 207483
000207483 005__ 20180317093411.0
000207483 022__ $$a1098-4402
000207483 0247_ $$2doi$$a10.1103/PhysRevSTAB.18.033401
000207483 037__ $$aARTICLE
000207483 245__ $$aIntrinsic emittance reduction of copper cathodes by laser wavelength tuning in an rf photoinjector
000207483 269__ $$a2015
000207483 260__ $$aCollege Pk$$bAmerican Physical Society$$c2015
000207483 300__ $$a6
000207483 336__ $$aJournal Articles
000207483 520__ $$aWith the improvement of acceleration techniques, the intrinsic emittance of the cathode has a strong impact on the final brightness of a free electron laser. The systematic studies presented in this paper demonstrate for the first time in a radiofrequency photocathode gun a reduction of the intrinsic emittance when tuning the laser photon energies close to the effective work function of copper. The intrinsic emittance was determined by measuring the core slice emittance as a function of the laser beam size at laser wavelengths between 260 and 275 nm. The results are consistent with the measured effective work function of the cathode. Slice emittance values normalized to the laser beam size reached values down to 500 nm/mm, close to that expected from theory. A 20% reduction of the intrinsic emittance was observed over the spectral range of the laser.
000207483 700__ $$aDivall, Marta Csatari
000207483 700__ $$aPrat, Eduard
000207483 700__ $$aBettoni, Simona
000207483 700__ $$aVicario, Carlo
000207483 700__ $$aTrisorio, Alexandre
000207483 700__ $$aSchietinger, Thomas
000207483 700__ $$0244705$$aHauri, Christoph P.$$g204280
000207483 773__ $$j18$$k3$$q033401$$tPhysical Review Special Topics - Accelerators and Beams
000207483 909CO $$ooai:infoscience.tind.io:207483$$particle$$pSB
000207483 909C0 $$0252525$$pGR-HAU$$xU12312
000207483 917Z8 $$x204280
000207483 917Z8 $$x148230
000207483 937__ $$aEPFL-ARTICLE-207483
000207483 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000207483 980__ $$aARTICLE