Commisioning of the FERMI@elettra laser heater

Simone Spampanati, Enrico Allaria, Laura Badano, Silvano Bassanese, Davide Castronovo, Miltcho B. Danailov, Alexander Demidovich, Simone Di Mitri, Bruno Diviacco, William M. Fawley, Lars Froelish, Giuseppe Penco, Carlo Spezzani, Mauro Trovò, Giovanni DeNinno, Eugenio Ferrari, Luca Giannessi

Research output: Contribution to conferencePaper

3 Citations (Scopus)


The linac of the FERMI seeded free electron laser includes a laser heater to control the longitudinal microbunching instability, which otherwise is expected to degrade the quality of high brightness electron beam sufficiently to reduce the FEL power. The laser heater consists of a short undulator located in a small magnetic chicane through which an external laser pulse enters to modulate the electron beam energy both temporally and spatially. This modulation, which varies on the scale of the laser wavelength, together with the effective R52 transport term of the chicane increases the incoherent energy spread (i.e., e-beam heating). We present the first commissioning results of this system, and its impact both upon the electron beam phase space, and upon the FEL output intensity and quality. Copyright © 2012 by the respective authors.
Original languageEnglish
Publication statusPublished - 2012
Externally publishedYes
Event34th International Free Electron Laser Conference, FEL 2012 - , Japan
Duration: 1 Jan 2012 → …


Conference34th International Free Electron Laser Conference, FEL 2012
Period1/1/12 → …


All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Spampanati, S., Allaria, E., Badano, L., Bassanese, S., Castronovo, D., Danailov, M. B., Demidovich, A., Di Mitri, S., Diviacco, B., Fawley, W. M., Froelish, L., Penco, G., Spezzani, C., Trovò, M., DeNinno, G., Ferrari, E., & Giannessi, L. (2012). Commisioning of the FERMI@elettra laser heater. Paper presented at 34th International Free Electron Laser Conference, FEL 2012, Japan.