PPPL-4147 is available in <a href="PPPL-4147.pdf">pdf</a> format (1 MB).

<p>
<b>Design and Numerical Stress Analysis of Silicon Membrane Hibachi Windows</b>
</p>

<p>
<b>Authors:</b> Chang H. Jun, Charles Gentile, Craig Priniski, and John Sethian
</p>

<p>
<b>Date of PPPL Report:</b> February 2006
</p>

<p>
<b>Presented at:</b> the 21st IEEE/NPSS Symposium on Fusion Engineering (SOFE), September 26-29, 2005, Knoxville, TN.</p>


<p>
A silicon membrane window is developed for a KrF laser system. The main function of the windows is to pass electron beam into the laser cell and to hold pressurized gas in the cell. 150 micro-meter thick silicon windows successfully survived from heated electron beam bombardment, and show 80% of electron beam transmission rate. The single silicon windows endured 250,000 cycles of electron beam shots. The arrayed windows did not show sufficient performance due to excessive heat generation. To enhance the longevity, the cooling system has to be improved, and a study of the arc generated by the cathode is necessary.







</p>