Accelerated life time testing of fused silica for DUV laser applications revised

2013 ◽  
Author(s):  
Christian Mühlig ◽  
Simon Bublitz
Keyword(s):  
Life Time ◽  
Fused Silica ◽  
Laser Applications ◽  
Accelerated Life

Accelerated life time testing of fused silica upon ArF laser irradiation

2008 ◽  
Author(s):  
Ch. Mühlig ◽  
W. Triebel ◽  
S. Kufert ◽  
U. Natura
Keyword(s):  
Laser Irradiation ◽  
Life Time ◽  
Fused Silica ◽  
Accelerated Life ◽  
Arf Laser

A High-Pressure Window for Volumetric Solar Receivers

1998 ◽  
Vol 120 (2) ◽  
pp. 101-107 ◽  
Author(s):  
J. Karni ◽  
A. Kribus ◽  
B. Ostraich ◽  
E. Kochavi
Keyword(s):  
High Pressure ◽  
Thermal Analyses ◽  
Life Time ◽  
Elevated Pressure ◽  
Fused Silica ◽  
Working Fluid ◽  
Operating Pressure ◽  
Accelerated Life ◽  
Solar Receiver

The absorbing matrix of a volumetric (directly irradiated) solar receiver must be exposed to the concentrated incoming sunlight. Most applications require that the receiver operates at an elevated pressure and in many cases the working fluid is not air. These requirements can be met only if the receiver is equipped with a transparent window. A novel frustum-like high-pressure (FLHiP) window, made of fused silica, is presented. Optical, mechanical, and thermal analyses, over 1,000 hours of accelerated life-time tests and several hundred hours of tests in a solar receiver, show that this window satisfies the required criteria for operation in a volumetric solar receiver, whose operating pressure and peak absorber temperature reach 30 bar and 1700°C, respectively.

scholarly journals Testing in Nonparametric Accelerated Life Time Models

2016 ◽  
Vol 37 (1) ◽  
Author(s):  
Hannelore Liero
Keyword(s):  
Limit Distribution ◽  
Goodness Of Fit ◽  
Bootstrap Method ◽  
Life Time ◽  
Test Statistic ◽  
Goodness Of Fit Test ◽  
Time Model ◽  
Power Of The Test ◽  
Accelerated Life ◽  
Type Test

A goodness-of-fit test for testing the acceleration function in a nonparametric life time model is proposed. For this aim the limit distribution of an L2-type test statistic is derived. Furthermore, a bootstrap method is considered and the power of the test is studied.

Accelerated life-time test of MEA durability under vehicle operating conditions in PEM fuel cell

2017 ◽  
Vol 11 (3) ◽  
pp. 326-333 ◽  
Author(s):  
Tian Tian ◽  
Jianjun Tang ◽  
Wei Guo ◽  
Mu Pan
Keyword(s):  
Fuel Cell ◽  
Life Time ◽  
Pem Fuel Cell ◽  
Operating Conditions ◽  
Accelerated Life ◽  
Time Test

Development of Accelerated Life Test Method of Hydraulic Pump

2006 ◽  
Vol 326-328 ◽  
pp. 1861-1864
Author(s):  
Dong Soo Jung ◽  
Hyoung Eui Kim ◽  
Sung Hun Kim ◽  
E Sok Kang
Keyword(s):  
Duty Cycle ◽  
Weighted Average ◽  
Life Time ◽  
Test Method ◽  
Accelerated Life Test ◽  
Hydraulic Pump ◽  
Life Test ◽  
Accelerated Life ◽  
Equivalent Load

This paper proposes a new accelerated life test method of hydraulic pump used in vehicles, which have multiple alternating loads. For determination of life time of hydraulic pump for given field conditions with respect to duty cycle, the equivalent load and speed of this unit has to be determined. Equivalent load and speed can be calculated from the given duty cycle using the predominant theory for cumulative fatigue damage. Finally, we can perform accelerated life test on hydraulic pump by determination of test pressure and speed from calculated equivalent cumulative damage per working cycle and weighted average speed.

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