Beamline D611 - Short information

Beamline D611 is a bending magnet beamline dedicated to time-resolved studies. MAX II is a pulsed source operating at 500 MHz. The duration of the pulses has been measured to be approximately 150 ps using a streak camera. The beamline has a double crystal mononchromator. Until a toroidal focusing mirror has been installed, one of the crystals in the monochromator is cylindrically bent to provide horisontal focusing. A laser providing pulses with durations of 20-30 fs has been synchronised to the ring, and a streakcamera yielding sub-ps time resolution will be installed. The temporal resolution will not depend on the relative jitter between the laser and the synchrotron (10 ps) but rather the jitter between the streak camera and the laser. The laser operates at a maximum of 10 kHz which sets the data accumulation repetition rate. You can read more about our research at Time-resolved X-ray science.

Contact persons:

Jörgen Larsson, beamline manager, Atomic Physics, LTH

Technical data:

Source	Bending magnet, 4 mrad.
Focusing optics	Not installed.
Monochromator	Double Crystal monochromator with Si (111) or InSb(111) crystals.
Energy range	2 - 10 keV
Energy resolution	E/dE = 2-5 x 104.
Photon flux on sample	~105 - 105 ph/s. (on laser repetition rate).
Spot size on sample	0.3(v) * 3(h) mm2.
Experimental station	The system consists of a short-pulse laser synchronised to the storage ring. A vacuum chamber providing pressures in the 10^-6 mbar range is available for combined laser/synchrotron radiation experiments. A streakcamera detector can be used for sub-ps time-resolution or alternatively an avalanche photo diode for the ns range can be used.

2007-08-22