Review of Scientific Instruments

A test stand for off-line laser ion source development at TRIUMF

J. P. Lavoie, R. Li, P. Bricault, J. Lassen, O. Chachkova et al.
A test stand for ion source development and laser resonance ionization spectroscopy was built and commissioned at TRIUMF. The test stand is needed to develop efficient ion sources that can function reliably in the hostile, high temperature, high radiation environment of TRIUMF's isotope separator on ... [Rev. Sci. Instrum. 84, 013306 (2013)] published Tue Jan 29, 2013.

Implementation of focal zooming on the Nike KrF laser

D. M. Kehne, M. Karasik, Y. Aglitsky, Z. Smyth, S. Terrell et al.
In direct drive inertial confinement laser fusion, a pellet containing D-T fuel is imploded by ablation arising from absorption of laser energy at its outer surface. For optimal coupling, the focal spot of the laser would continuously decrease to match the reduction in the pellet's diameter, thereby ... [Rev. Sci. Instrum. 84, 013509 (2013)] published Tue Jan 29, 2013.

Adaptive femtosecond laser-induced breakdown spectroscopy of uranium

P. Ko, K. C. Hartig, J. P. McNutt, R. B. D. Schur, T. W. Jacomb-Hood et al.
Laser-induced breakdown spectroscopy (LIBS) is an established technique for material characterization applicable to a variety of problems in research, industry, environmental studies, and security. LIBS conducted with femtosecond laser pulses exhibits unique properties, arising from the characterist ... [Rev. Sci. Instrum. 84, 013104 (2013)] published Fri Jan 25, 2013.

Endstation for ultrafast magnetic scattering experiments at the free-electron laser in Hamburg

L. Muller, C. Gutt, S. Streit-Nierobisch, M. Walther, S. Schaffert et al.
An endstation for pumpprobe small-angle X-ray scattering (SAXS) experiments at the free-electron laser in Hamburg (FLASH) is presented. The endstation houses a solid-state absorber, optical incoupling for pumpprobe experiments, time zero measurement, sample chamber, and detection unit. It can be use ... [Rev. Sci. Instrum. 84, 013906 (2013)] published Thu Jan 24, 2013.

Note: Comparison between a prism-based and an acousto-optic tunable filter-based spectrometer for diffusive media

A. Farina, I. Bargigia, P. Taroni, and A. Pifferi
This paper compares two continuously tunable systems for time-resolved spectroscopy of diffusive media based on a supercontinuum laser source. Two approaches for spectral selection are considered relying either on a dispersive prism or on a commercial acoustic-optic tunable filter (AOTF) device. The ... [Rev. Sci. Instrum. 84, 016109 (2013)] published Wed Jan 23, 2013.

A novel photonic Doppler velocimetry for transverse velocity measurement

Guanghua Chen, Detian Wang, Jun Liu, Jianhua Meng, Shouxian Liu et al.
A fiber interferometry for transverse velocity measurement has been developed. This diagnostic is similar to photonic Doppler velocimetry in the way in which laser propagates and couples. The interferometer mainly consists of a fiber coupler, an emitting probe, and two receiving probes. A pair of sc ... [Rev. Sci. Instrum. 84, 013101 (2013)] published Fri Jan 18, 2013.

Development of a single-shot-imaging thin film for an online Thomson parabola spectrometer

H. Sakaki, M. Kanasaki, Y. Fukuda, M. Nishiuchi, T. Hori et al.
A single-shot-imaging thin scintillator film was developed for an online Thomson parabola (TP) spectrometer and the first analysis of laser accelerated ions, using the online TP spectrometer, was demonstrated at the JAEA-Kansai Advanced Relativistic Engineering Laser System (J-KAREN). An energy spec ... [Rev. Sci. Instrum. 84, 013301 (2013)] published Wed Jan 9, 2013.

Note: Focus error detection device for thermal expansion-recovery microscopy (ThERM)

E. A. Domene and O. E. Martinez
An innovative focus error detection method is presented that is only sensitive to surface curvature variations, canceling both thermoreflectance and photodefelection effects. The detection scheme consists of an astigmatic probe laser and a four-quadrant detector. Nonlinear curve fitting of the defoc ... [Rev. Sci. Instrum. 84, 016104 (2013)] published Tue Jan 8, 2013.

Note: Switch-mode hybrid current controllers for quantum cascade lasers

Matthew S. Taubman
Chemical sensing in the mid-infrared has been revolutionized by the advent of quantum cascade lasers. Their higher current and voltage demands compared to laser diodes however, negatively impact size, weight, and power footprint for fieldable systems, particularly in hot environments. This Note pres ... [Rev. Sci. Instrum. 84, 016103 (2013)] published Mon Jan 7, 2013.

Monitoring of railway embankment settlement with fiber-optic pulsed time-of-flight radar

Ari Kilpela, Veijo Lyori, and Guoyong Duan
This paper deals with a fiber-optic pulsed time-of-flight (PTOF) laser radar used for monitoring the settlement of a railway embankment. The operating principle is based on evaluating the changes in the lengths of the fiber-optic cables embedded in the embankment by measuring the time separation of ... [Rev. Sci. Instrum. 83, 125004 (2012)] published Fri Dec 28, 2012.

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