<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:DengXian;
panose-1:2 1 6 0 3 1 1 1 1 1;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:"\@DengXian";
panose-1:2 1 6 0 3 1 1 1 1 1;}
@font-face
{font-family:Roboto;
panose-1:2 0 0 0 0 0 0 0 0 0;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
font-size:10.0pt;
font-family:"Calibri",sans-serif;}
h3
{mso-style-priority:9;
mso-style-link:"Heading 3 Char";
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:13.5pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
span.Heading3Char
{mso-style-name:"Heading 3 Char";
mso-style-priority:9;
mso-style-link:"Heading 3";
font-family:"Calibri Light",sans-serif;
color:#1F3763;}
span.gmail-qu
{mso-style-name:gmail-qu;}
span.gmail-gd
{mso-style-name:gmail-gd;}
span.gmail-go
{mso-style-name:gmail-go;}
span.gmail-g3
{mso-style-name:gmail-g3;}
span.gmail-hb
{mso-style-name:gmail-hb;}
span.gmail-g2
{mso-style-name:gmail-g2;}
span.EmailStyle26
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-US" link="blue" vlink="purple" style="word-wrap:break-word;-webkit-nbsp-mode: space;line-break:after-white-space">
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:11.0pt">Hi Antoine,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Setting ed_numberOfRays_1 as a multiple of ed_gridnRadialTics_1, so that there are integer number of angular slices, might help to better match the expected profile.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Best,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Yingchao<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;color:black">From:
</span></b><span style="font-size:12.0pt;color:black">flash-users <flash-users-bounces@flash.rochester.edu> on behalf of Reyes, Adam <adam.reyes@rochester.edu><br>
<b>Date: </b>Wednesday, February 23, 2022 at 3:19 PM<br>
<b>To: </b>Antoine Gintrand <antoine.gintrand@gmail.com><br>
<b>Cc: </b>flash-users@flash.rochester.edu <flash-users@flash.rochester.edu><br>
<b>Subject: </b>Re: [FLASH-USERS] problem with spatial distribution of laser rays<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span style="font-size:11.0pt">Hi Antoine, <o:p></o:p></span></p>
<div>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:11.0pt">I think this might be related to using the 2Din3D ray tracing combined with a radial grid for the rays. On a 2D radial grid, with points equally spaced in radius and angle the density of rays will be higher
closer to r=0, and so the laser power is distributed amongst a larger number of rays, so the individual rays will have less power than farther away. You might be able to account for this by weighing the ray power by a factor of 1/r to account for the change
in ray density.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:11.0pt"> You can see that the energy deposition in your plot seems to match the expected profile.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:11.0pt">Adam<o:p></o:p></span></p>
<div>
<p class="MsoNormal"><span style="font-size:11.0pt"><br>
<br>
<o:p></o:p></span></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal"><span style="font-size:11.0pt">On Feb 23, 2022, at 11:19 AM, Antoine Gintrand <<a href="mailto:antoine.gintrand@gmail.com">antoine.gintrand@gmail.com</a>> wrote:<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<div>
<div>
<div>
<div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Roboto"><img border="0" id="gmail-_x003a_my_15-e" src="https://ssl.gstatic.com/ui/v1/icons/mail/profile_mask2.png" name=":my"><o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0" width="0" style="width:0in;border-collapse:collapse">
<tbody>
<tr>
<td width="853" nowrap="" valign="top" style="width:639.95pt;padding:0in 0in 0in 0in">
<table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0" width="853" style="width:639.95pt;border-collapse:collapse">
<tbody>
<tr>
<td style="padding:0in 0in 0in 0in">
<h3 style="line-height:15.0pt"><span class="gmail-gd"><span style="color:#202124;letter-spacing:.15pt">Antoine Gintrand</span></span><span class="gmail-qu"><span style="color:#5F6368;letter-spacing:.25pt"> </span></span><span class="gmail-go"><span style="color:#555555;letter-spacing:.25pt"><<a href="mailto:antoine.gintrand@gmail.com">antoine.gintrand@gmail.com</a>></span></span><span style="color:#5F6368;letter-spacing:.25pt"><o:p></o:p></span></h3>
</td>
</tr>
</tbody>
</table>
</td>
<td nowrap="" valign="top" style="padding:0in 0in 0in 0in;max-height:20px">
<div>
<p class="MsoNormal" align="right" style="text-align:right"><span style="font-size:11.0pt;letter-spacing:.15pt"><img border="0" id="_x0000_i1028" src="https://mail.google.com/mail/u/0/images/cleardot.gif" alt="Pièces jointes"></span><span class="gmail-g3"><span style="font-size:11.0pt;color:#5F6368;letter-spacing:.25pt">17:34
(il y a 2 heures)</span></span><span style="font-size:11.0pt;letter-spacing:.15pt">
<o:p></o:p></span></p>
</div>
</td>
<td nowrap="" valign="top" style="padding:0in 0in 0in 0in;display:flex"></td>
<td nowrap="" rowspan="2" valign="top" style="padding:0in 0in 0in 0in;max-height:20px">
<div style="margin-left:15.0pt;display:inline-flex;border-radius:2px 0px 0px 2px;font-size:0.875rem;min-width:0px;outline:none">
<p class="MsoNormal" align="center" style="text-align:center;line-height:13.5pt">
<span style="font-size:11.0pt;color:#444444;letter-spacing:.15pt"><img border="0" id="_x0000_i1027" src="https://mail.google.com/mail/u/0/images/cleardot.gif"><o:p></o:p></span></p>
</div>
<div style="margin-left:15.0pt;display:inline-flex;border-radius:0px 2px 2px 0px;font-size:0.875rem;min-width:0px;outline:none" id="gmail-:2qm">
<p class="MsoNormal" align="center" style="text-align:center;line-height:13.5pt">
<span style="font-size:11.0pt;color:#444444;letter-spacing:.15pt"><img border="0" id="_x0000_i1026" src="https://mail.google.com/mail/u/0/images/cleardot.gif"><o:p></o:p></span></p>
</div>
</td>
</tr>
<tr style="display:flex">
<td colspan="3" style="padding:0in 0in 0in 0in;text-overflow:ellipsis;display:flex;overflow:visible">
<table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0" width="1120" style="width:840.0pt;border-collapse:collapse">
<tbody>
<tr>
<td style="padding:0in 0in 0in 0in">
<div>
<p class="MsoNormal" style="line-height:15.0pt"><span class="gmail-hb"><span style="font-size:11.0pt;color:#5F6368;letter-spacing:.25pt">À </span></span><span class="gmail-g2"><span style="font-size:11.0pt;color:#5F6368;letter-spacing:.25pt">flash-users</span></span><span style="font-size:11.0pt"><o:p></o:p></span></p>
</div>
<div style="margin-left:3.0pt;display:inline-flex;outline:none" id="gmail-:3n9">
<p class="MsoNormal" style="line-height:15.0pt;vertical-align:top"><span style="font-size:11.0pt"><img border="0" id="_x0000_i1025" src="https://mail.google.com/mail/u/0/images/cleardot.gif"><o:p></o:p></span></p>
</div>
</td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
</div>
<div>
<div style="margin-top:6.0pt;font-size:0.875rem" id="gmail-:3ed">
<div id="gmail-:3nb">
<div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif">Dear flash users,<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif">I have a problem concerning the spatial distribution of my laser rays.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif">The laser is supposed to come from the top with no angle<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif">and hit the target at z = 400 microns with a gaussian spatial profile<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif">I(r) = exp (-(r/R)^gamma) where gamma = 4.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif">The rest of the domain is a 100 microns low density vacuum at the top.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif">Unfortunately the centre of the gaussian is not in r = 0. Why so?<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif">I do not understand because I put the center of the gaussian to<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif">be ed gaussianCenterMajor_1 = 0. and ed_gaussiancenterMinor_1 = 0.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif">I am using 3Dto2D laser ray tracing.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif">Here is attached my .par file and .log and a plot of the depo var + rays power.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif">Thank you very much for any help on this,<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif">All the best,<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif">Antoine<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<p class="MsoNormal"><span style="font-size:11.0pt"><depo_nofoam_t50ps.png><flash.par><lasslab.log>_______________________________________________<br>
flash-users mailing list<br>
<a href="mailto:flash-users@flash.rochester.edu">flash-users@flash.rochester.edu</a><br>
<br>
For list info, including unsubscribe:<br>
https://flash.rochester.edu/mailman/listinfo/flash-users<o:p></o:p></span></p>
</div>
</blockquote>
</div>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
</div>
</div>
</body>
</html>