Results 251 to 260 of about 78,610 (291)

Cryogenic cooling of monochromators

Review of Scientific Instruments, 1992
In this paper, we report on the design and x-ray diffraction properties of cryocooled silicon single crystals exposed to the following wiggler beams: power density: 150 W/mm2, total power: 75 W and power density: 0.5 W/mm2, total power: 100 W. First, thermomechanical and engineering aspects of low-temperature crystal cooling are discussed, leading to ...
G. Marot, M. Rossat, A. Freund, S. Joksch, H. Kawata, L. Zhang, E. Ziegler, L. Berman, D. Chapman, J. B. Hastings, M. Iarocci   +10 more
openaire   +1 more source

System-Level Impingement Cooling with Cryogens

Journal of Thermophysics and Heat Transfer, 2020
System-level impingement cooling with cryogens has potential thermal applications in size-constrained, weight-constrained, and power-constrained or low-atmosphere environments by utilizing a phase change for enhanced heat transfer at cryogenic temperatures. In this work, an experiment capable of measuring the heat and mass flow of liquid nitrogen jets
Nicholas Pellizzari, Ryan Touzjian, Andrea Scouras, William P. Flaherty   +3 more
openaire   +1 more source

Cryogenically cooled Er:YAG laser

2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference, 2007
We demonstrated highly efficient ultra-low-photon-defect resonantly diode-pumped Er-doped cryo-cooled laser. Slope efficiency of 71.5% per cavity absorbed power was achieved at 78 degK in these initial experiments. It was shown that cryo-laser resonantly pumped by "full-width" laser diodes can be temperature tuned to achieve better optimized overall ...
M. Dubinskii, N. Ter-Gabrielyan, G. A. Newburgh, L. D. Merkle   +3 more
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Cryogenically cooled Ti:sapphire amplifiers

SPIE Proceedings, 2006
Power scaling in laser systems is fundamentally constrained by detrimental effects of absorbed heat in the lasing medium. Cryogenic cooling is a well known technique for improving thermal performance in solid state laser materials. In particular the dramatic improvement in the thermal properties of Ti:sapphire at cryogenic temperatures has enabled a ...
Jean-Marc Heritier, Steve Fournier, G. J. Germann, B. Resan, R. Viselga, A. Fry   +5 more
openaire   +1 more source

165-W cryogenically cooled Yb:YAG laser

Optics Letters, 2004
Thermo-optic distortions often limit the beam quality and power scaling of high-average-power lasers. Cryogenically cooled Yb:YAG is used to efficiently generate 165 W of near-diffraction-limited beam from a power oscillator with negligible thermo-optic effects.
Daniel J, Ripin, Juan R, Ochoa, R L, Aggarwal, Tso Yee, Fan   +3 more
openaire   +2 more sources

Cooling power of transverse thermoelectrics for cryogenic cooling

SPIE Proceedings, 2016
Transverse Peltier coolers have been experimentally and theoretically studied since 1960s due to their capability of achieving cooling in a single-leg geometry. Recently proposed p x n -type transverse thermoelectrics reveal the possibility of intrinsic or undoped transverse coolers that can, in principle, function at cryogenic temperatures, which has
Yang Tang, Ming Ma, M. Grayson
openaire   +1 more source

Cryogenic Cooling by Noncondensible-Gas Injection

Science, 1965
Temperature control of various cryogenic liquids in the range from their boiling points to near or below their freezing points has been achieved by injecting a noncondensing gas, helium. The process is more easily accomplished than the usual vapor-pumping technique and is applicable in the range from 15° to 300°K.
F W, Lytle, J T, Stoner
openaire   +2 more sources

Cryogenic-cooled Tm:SBN tunable laser

Photonics, Devices, and Systems VII, 2017
In this work the temperature dependence of spectroscopic and laser properties of new ac- tive medium Tm:SBN (Strontium-Barium Niobate, SrxBa1−xNb2O6, x = 0.61). The tested sample of Tm:SBN (2 wt. % of Tm2O3) appropriate for generation of laser radiation at 1.88 μm had plan-parallel polished faces without anti-reflection (thickness 6.65 mm).
Liudmila I. Ivleva, Pavel A. Lykov, Alexander G. Papashvili, Maxim E. Doroshenko, Helena Jelínková, Michal Němec, Jan Šulc, Richard Švejkar   +7 more
openaire   +1 more source

High Energy Cryogenically Cooled Ho:YAG Oscillator

2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2021
High energy laser sources operating around 2 µm are of interest in a variety of applications: LIDAR, material processing, medicine and pump sources for optical parametric oscillators (OPOs) for high-energy mid-IR nonlinear conversion. The OPO approach using ZGP is a scalable route for generating mid-IR radiation. In order to achieve high energy output,
Miftar Ganija, Keiron Boyd, Alexander Hemming, Neil Carmody, Nikita Simakov, Peter Veitch, Jesper Munch   +6 more
openaire   +1 more source

Cryogenically cooled, Ho:YAG, Q-switched laser

Applied Physics B, 2020
The authors report on the performance and scalability of a Q-switched, cryogenically cooled Ho:YAG laser. The Ho:YAG slab was resonantly pumped using a continuous wave thulium fibre laser, and the output energy from the oscillator was extracted using a confocal resonator with a single-pass pump geometry, resulting in 135 mJ at 200 Hz with a beam ...
Miftar Ganija, Alexander Hemming, Nikita Simakov, Keiron Boyd, Neil Carmody, Peter Veitch, John Haub, Jesper Munch   +7 more
openaire   +1 more source