Investigation of the laser pumping power impact on the operating regimes of a laser passively Q-switched by a saturated absorber

2011 ◽  
Vol 50 (9) ◽  
pp. 094201 ◽  
Author(s):  
Mustapha Benarab
Keyword(s):  
Pumping Power ◽  
Laser Pumping ◽  
Saturated Absorber ◽  
Operating Regimes

Blue Upconversion Luminescence Properties of La2(WO4)3:Yb3+/Tm3+Phosphor

2011 ◽  
Vol 399-401 ◽  
pp. 1020-1025
Author(s):  
Jin Sheng Liao ◽  
Hang Ying You ◽  
Qing Xia Wu ◽  
He Rui Wen ◽  
Jing Lin Chen ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Upconversion Luminescence ◽  
Hydrothermal Process ◽  
Pumping Power ◽  
X Ray Diffraction ◽  
X Ray ◽  
Laser Pumping ◽  
Upconversion Mechanism ◽  
Upconversion Emissions ◽  
Scanning Electron

Monoclinic La2(WO4)3 nanophosphors codoped with Tm3+ and Yb3+ ions were synthesized via hydrothermal process followed by heat treatment. Powder X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to characterize as-prepared samples. The dependences of Yb3+/ concentration and laser pumping power on the upconversion emissions were extensively investigated. The results show that upconversion luminescence increases with the Yb3+/ concentration and gets its peak at 30 %. The upconversion mechanism and process in the Yb3+/Tm3+ codoped La2(WO4)3 phosphors were analysed.

Effect of laser pumping power on the SRS-CARS signal in compressed hydrogen

2007 ◽  
Vol 33 (4) ◽  
pp. 319-322
Author(s):  
G. M. Mikheev ◽  
A. Yu. Popov ◽  
T. N. Mogileva
Keyword(s):  
Pumping Power ◽  
Laser Pumping

Controlled Filament Non-Local Discharge (CFND) for Laser Pumping and Plasma Processing

2009 ◽  
Author(s):  
George Miley ◽  
Atanu Khan ◽  
Ben Ulmen ◽  
Guilherme Amadio ◽  
Hugo Leon
Keyword(s):  
Plasma Processing ◽  
Laser Pumping ◽  
Non Local

Transient operating regimes modeling in low-power boilers of a high-temperature fluidized bed

2020 ◽  
Vol 919 ◽  
pp. 052042
Author(s):  
A V Bondarev ◽  
S V Sarkisov ◽  
V N Tarasov ◽  
V A Vakunenko ◽  
N A Biryukov
Keyword(s):  
High Temperature ◽  
Low Power ◽  
Fluidized Bed ◽  
Operating Regimes

Operating regimes in circulating fluidized bed combustors: fast fluidization or bubbling-entrained bed?

Fuel ◽  
2021 ◽  
Vol 297 ◽  
pp. 120727
Author(s):  
Jiaying Wang ◽  
Zeneng Sun ◽  
Yuanyuan Shao ◽  
Jesse Zhu
Keyword(s):  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Operating Regimes

scholarly journals Numerical study of a ring-array-concentrator for Nd:YAG solar laser pumping

2021 ◽  
Vol 1859 (1) ◽  
pp. 012057
Author(s):  
R Boutaka ◽  
R Bouadjemine ◽  
D Liang ◽  
N Hendaoui ◽  
A Kellou
Keyword(s):  
Numerical Study ◽  
Laser Pumping

scholarly journals Background Pressure Effects on the Performance of a 20 kW Magnetically Shielded Hall Thruster Operating in Various Configurations

Aerospace ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 69
Author(s):  
Antonio Piragino ◽  
Farbod Faraji ◽  
Maryam Reza ◽  
Eugenio Ferrato ◽  
Annalisa Piraino ◽  
...  
Keyword(s):  
Mass Flow ◽  
Discharge Current ◽  
Pressure Effects ◽  
Hall Thruster ◽  
Physical Processes ◽  
Linear Behavior ◽  
Mass Flow Rates ◽  
Anode Mass ◽  
Lower Background ◽  
Operating Regimes

The paper reports the characterization results of a 20 kW-class magnetically shielded Hall thruster in three different configurations and operating with a centrally mounted cathode. The characterization was carried out at two different pumping speeds in SITAEL’s IV10 vacuum chamber, resulting in two different background pressure levels for each tested operating point. A linear behavior of discharge current and thrust values versus the anode mass flow rate was noticed for both pumping speeds levels and for all the three configurations. In addition, the thrust and discharge current values were always found to be lower at lower background pressure levels. From the performance levels, a preliminary estimate of the ingested mass flow rates was performed, and the values were then compared to a recently developed background flow model. The results suggested that, for this thruster and in the tested operating regimes, the change in performance due to background pressure could be ascribed not only to the ingestion of external mass flow coming from the chamber but also to other physical processes caused by the flux of residual background neutrals.

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