Experimental Techniques
In the last years I have mastered the operation of
the following equipment, derived from mainly two type of experimental
tecniques: (magneto-)optical
spectroscopy, and transient
absorption pump-probe experiments. The experiments involving a
Free Electron Laser (two-color spectroscopy and pump-probe experiments)
were carried on in the FELIX Facility,
FOM-Institute for Plasma Physics Rijnhuizen.
- Excitation sources, LASERs
- CW lasers
- Ar-ion laser (VIS and UV, several lines)
- He-Cd laser (UV, 265 nm)
- Millenia solid state laser (VIS, 532 nm)
- Multiple small solid state laser units (VIS and
near-IR)
- Pulsed lasers
- Nd:YAG laser, working at fundamental (1064 nm),
second (532 nm) and third harmonics (354 nm); 10 Hz, 5 ns pulses
- OPO pumped by the 3rd harmonic of the YAG (tunable
400 - 2700 nm)
- OPO+DFG double
non-linear crystal (tunable 9000 - 17000 nm)
- Free Electron Laser (FEL), in the FOM-Institute
Rijnhuizen FELIX Facility
- Free Electron Laser, FELIX Facility Rijnhuizen
- The FELIX facility provides continuously tunable,
pulsed radiation in the near- to far-IR (4 - 250 µm). The
infrared beam consists of short micropulses of 5 ps; a train of
micropulses form a macropulse with a duration up to 15 µs. The
micropulses are used in our research in pump-probe experiments, whereas
the macropulses in two-color experiments.
- Detectors
- InGaAs Photomultiplier Tube (PMT) Hamamatsu R5509 (300
- 1700
nm detection range), which can be operated in time-correlated photon
counting mode,
providing time resolution up to 250 ps
- El-Ge high sensitivity detector, Edinburgh Intruments
- Spectrometers
- Three Jobin-Yvon grating spectrometers:
Triax 320, Triax 550, and Spex 1000 (high resolution)
- Cryogenics, optical cryostats
- Flow cryostat, Oxford Instruments, allowing variable
temperatures between 4 and 300 K
- Closed-cycle cryostat, Oxford Instruments, down to 15 K
- Magneto-Optics
- Split-coil superconducting magnet with optical access,
providing variable magnetic fields up to 8 T, and temperatures down to
2.5 K
|