Laser Mira HP (Sincrotrone Trieste)

The X-ray absorption spectroscopy (XAS and XMCD) open up various opportunities to probe laser-induced changes of the electronic, magnetic and geometric structure. The properties of the TR-XAS/XMCD@BACH endstation offer wide experimental conditions with respect to repetition rate, overall energy range, time-resolution, operation modes of the Synchrotron source and sample experimental enviroments.

Elettra Synchrotron radiation source provide radiation pulse widths sufficiently short to investigate dynamic processes in the time between 70 ps up to 0.5 μs. Typically, optical excitation of the sample is done by laser pulses (synchronized to either hybrid or multi bunch SR pulses), and probing is performed by time-delayed synchrotron radiation pulses. For the optical excitation of the sample we use a Mira HP Ti:Sa oscillator with a pulsepicker and produces nJ pulses with a repetition rate tunable between 0.01 and 83.3 MHz.
The maximum pulse energy at 800nm is about 9nJ/pulse (fluence about 20 microJ/cm2 in the centre of the focus), 2W
At 400nm pulse energy and fluence are about 10-times lower (with the BBO 50 mW).
The laser belongs to Elettra Sincrotrone Trieste S.C.p.A. The XAS experiments are performed measuring the X-ray fluorescence yield by means of an ultra-fast MCP detector (Hamamatsu). Different acquisition modes are available: full XAS energy scan, fixed Energy-time delayed acquisitions.
IMPORTANT UPDATE: The RegA9000 Laser (a regenerative amplifier system (RegA9000 from Coherent) providing 5µJ photon pulses at a repetition rate of 250 kHz will not be available from September 2015. Mira HP will be still available.

For the Time-resolved setup at BACH: read here
For the Laser set up: read here 
For the time-resolved XAS acquisition: read here

Please contact BACH staff for further information.

Feature of the Laser Sources RegA9000 (NOT AVAILABLE) Mira HP Ti:Sa oscillator
Wavelenght 800nm; SHG: 400nm 800nm; SHG: 400nm
Pulse width 100 fs 100 fs
Pulse energy 5 μJ/pulse (NOT AVAILABLE) 24 nJ/pulse@800nm @83.3MHz
0.6 nJ/pulse@400nm @83.3MHz
5.6 nJ/pulse@800nm @4.6MHz
0.07 nJ/pulse@800nm @4.6MHz
Repetition rate 200-250 KHz (NOT AVAILABLE) (5-0.01) MHz and 83.3 MHz


Last Updated on Wednesday, 20 October 2021 14:44