Cooling options for high-average-power laser mirrors
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F15%3A00367393" target="_blank" >RIV/68407700:21340/15:00367393 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1117/12.2086590" target="_blank" >https://doi.org/10.1117/12.2086590</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1117/12.2086590" target="_blank" >10.1117/12.2086590</a>
Alternative languages
Result language
angličtina
Original language name
Cooling options for high-average-power laser mirrors
Original language description
Thermally-induced deformations of steering mirrors reflecting 100 J/10 Hz laser pulses in vacuum have been analyzed. This deformation is caused by the thermal stress arisen due to parasitic absorption of 1 kW square-shaped flat-top laser beam in the dielectric multi-layer structure. Deformation depends on amount of absorbed power and geometry of the mirror as well as on the heat removal scheme. In our calculations, the following percentages of absorption of the incident power have been used: 1%, 0.5% and 0.1%. The absorbed power has been considered to be much higher than that expected in reality to assess the worst case scenario. Rectangular and circular mirrors made of zerodur (low thermal expansion glass) were considered for these simulations. The effect of coating layers on induced deformations has been neglected. Induced deformation of the mirror surface can significantly degrade the quality of the laser beam in the beam delivery system. Therefore, the proper design of the cooling scheme for the mirror in order to minimize the deformations is needed. Three possible cooling schemes of the mirror have been investigated. The first one takes advantage of a radiation cooling of the mirror and a copper heatsink fixed to the rear face of the mirror, the second scheme is based on additional heat conduction provided by flexible copper wires connected to the mirror holder, and the last scheme combines two above mentioned methods.
Czech name
—
Czech description
—
Classification
Type
D - Article in proceedings
CEP classification
—
OECD FORD branch
20501 - Materials engineering
Result continuities
Project
—
Continuities
S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Proc. SPIE 9442, Optics and Measurement Conference 2014
ISBN
978-1-62841-557-5
ISSN
0277-786X
e-ISSN
1996-756X
Number of pages
7
Pages from-to
—
Publisher name
SPIE
Place of publication
Bellingham (stát Washington)
Event location
Liberec
Event date
Oct 7, 2014
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000349403500051