Record wavelength at FLASH – First lasing below 4.5 nanometres (Jun. 2010)
For the first time, FLASH produced laser light with a wavelength of 4.45 nanometres; thus, DESY’s free-electron laser for soft X-ray light considerably beat its previous record of 6.5 nanometres. At the same time, the peak intensity of single light pulses nearly doubled, with 0.3 millijoule. ...