<p>
Hi Eddie:
</p>
<p>
<br>
</p>
<p>
Thank you for your reply. At here i only use one beam coming at 45 degree, but in the end i will use maybe four beams from different angle to implode a part of this spherical shell. So i need to keep these beams symmetric to their incident axis.
</p>
<p>
<br>
</p>
<p>
2D cartesian geometry is not accuurate in this simulation, and 3D simulation spend too much time, so I need use 2D cylindrical set up to do this.
</p>
<p>
<br>
</p>
<p>
Thank you for your suggestion!
</p>
<p>
<br>
</p>
<p>
-Ke Fang
</p>
<br>
<br>
<blockquote name="replyContent" class="ReferenceQuote" style="padding-left:5px;margin-left:5px;border-left:#b6b6b6 2px solid;margin-right:0;">
-----原始邮件-----<br>
<b>发件人:</b><span id="rc_from">"Eddie Hansen" <ehansen@pas.rochester.edu></span><br>
<b>发送时间:</b><span id="rc_senttime">2020-09-10 19:02:33 (星期四)</span><br>
<b>收件人:</b> "方可" <kfang@iphy.ac.cn><br>
<b>抄送:</b> "Shu Zhang" <shz133@eng.ucsd.edu>, flash-users <flash-users@flash.uchicago.edu><br>
<b>主题:</b> Re: [EXT] Re: [FLASH-USERS] laser setup in cylindrical geometry<br>
<br>
<div dir="auto">
Not sure what else you have going on in your simulation, but why not rotate your frame of reference? The 1 beam coming in at 45 degrees is still just 1 beam pointed towards the center of a sphere. You could have it come from 0 deg (the equator), and then it will look symmetric.
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">
On Thu, Sep 10, 2020, 2:55 AM 方可 <<a href="mailto:kfang@iphy.ac.cn">kfang@iphy.ac.cn</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<p>
<span style="font-family:Verdana;font-size:14px;">Hi Shu:</span>
</p>
<p>
<br>
</p>
<p>
<span style="font-family:Verdana;font-size:14px;">Thank you for your explanation, this make sense and now i understand why at the pole end the intensity is always stronger. I will try some other methods like 3D simulation. </span>
</p>
<p>
<span style="font-family:Verdana;font-size:14px;"><br>
</span>
</p>
<p>
<span style="font-family:Verdana;font-size:14px;">Best regards,</span>
</p>
<p>
<span style="font-family:Verdana;font-size:14px;"><br>
</span>
</p>
<p>
<span style="font-family:Verdana;font-size:14px;">-Ke Fang</span>
</p>
<br>
<blockquote name="replyContent" style="padding-left:5px;margin-left:5px;border-left:#b6b6b6 2px solid;margin-right:0;">
-----原始邮件-----<br>
<b>发件人:</b><span id="m_5853046075679043878rc_from">"Shu Zhang" <<a href="mailto:shz133@eng.ucsd.edu" target="_blank" rel="noreferrer">shz133@eng.ucsd.edu</a>></span><br>
<b>发送时间:</b><span id="m_5853046075679043878rc_senttime">2020-09-10 12:34:17 (星期四)</span><br>
<b>收件人:</b> "方可" <<a href="mailto:kfang@iphy.ac.cn" target="_blank" rel="noreferrer">kfang@iphy.ac.cn</a>><br>
<b>抄送:</b> "<a href="mailto:flash-users@flash.uchicago.edu" target="_blank" rel="noreferrer">flash-users@flash.uchicago.edu</a>" <<a href="mailto:flash-users@flash.uchicago.edu" target="_blank" rel="noreferrer">flash-users@flash.uchicago.edu</a>><br>
<b>主题:</b> Re: [FLASH-USERS] laser setup in cylindrical geometry<br>
<br>
Hi Ke,
<div>
<br>
</div>
<div>
After 3D-in-2D projection, the simulation is working like you have a ring of lasers injected at 45 deg. So at the pole, you have higher overlapped intensity, but at the equator, the averaged intensity is lower. This is real<span style="color:#000000;"> when multiple large spot beams are injected at 45 deg. </span><br>
<div>
<br>
</div>
<div>
-Shu
</div>
<div>
<br>
<blockquote type="cite">
<div>
On Sep 9, 2020, at 8:32 PM, 方可 <<a href="mailto:kfang@iphy.ac.cn" target="_blank" rel="noreferrer">kfang@iphy.ac.cn</a>> wrote:
</div>
<br>
<div>
<p>
Shu:
</p>
<p>
<br>
</p>
<p>
Thank you very much for your answer, but i think there is still some problem. What i mean is when i inject the laser with 45 deg, truly the intensity and energy is not uniform, but i think it should be symmetrically to the 45 degree injection axis.
</p>
<br>
<p>
When i use the cartesian geometry without 3Din2D laser setup, the results is symmetrical, but I need run this in cylindrical geometry. I added 2 screenshot of these results of pressure distribution in the mail attachment.
</p>
<p>
<br>
</p>
<p>
Thank you for your help!
</p>
<div>
<br>
</div>
<p>
-Ke Fang
</p>
<p>
<br>
</p>
<blockquote name="replyContent" style="padding-left:5px;margin-left:5px;border-left:#b6b6b6 2px solid;margin-right:0;">
-----原始邮件-----<br>
<b>发件人:</b><span id="m_5853046075679043878rc_from">"Shu Zhang" <<a href="mailto:shuzhang@princeton.edu" target="_blank" rel="noreferrer">shuzhang@princeton.edu</a>></span><br>
<b>发送时间:</b><span id="m_5853046075679043878rc_senttime">2020-09-10 10:56:45 (星期四)</span><br>
<b>收件人:</b> "方可" <<a href="mailto:kfang@iphy.ac.cn" target="_blank" rel="noreferrer">kfang@iphy.ac.cn</a>><br>
<b>抄送:</b> "<a href="mailto:flash-users@flash.uchicago.edu" target="_blank" rel="noreferrer">flash-users@flash.uchicago.edu</a>" <<a href="mailto:flash-users@flash.uchicago.edu" target="_blank" rel="noreferrer">flash-users@flash.uchicago.edu</a>><br>
<b>主题:</b> Re: [FLASH-USERS] laser setup in cylindrical geometry<br>
<br>
Hi Ke,
<div>
<br>
</div>
<div>
Your settings are correct. The 3D in 2D laser ray tracing is calculating the laser ray deflection and the energy deposition in 3D and then project the energy deposition on the 2D RZ coordinates. Thus, when the laser is injected in 45 deg, naturally
the projected energy deposition is not really uniform. It would look like uniform if you have a planar target normal to the Z(Y) axis.
</div>
<div>
<br>
</div>
<div>
-Shu
</div>
<div>
<div>
<div>
<br>
<blockquote type="cite">
<div>
On Sep 9, 2020, at 7:42 PM, 方可 <<a href="mailto:kfang@iphy.ac.cn" target="_blank" rel="noreferrer">kfang@iphy.ac.cn</a>> wrote:
</div>
<br>
<div>
<div style="font-family:"lucida Grande",Verdana,"Microsoft YaHei";font-size:14px;white-space:normal;background-color:#ffffff;">
Hi, everyone:
</div>
<div style="font-family:"lucida Grande",Verdana,"Microsoft YaHei";font-size:14px;white-space:normal;background-color:#ffffff;">
<br>
</div>
<div style="font-family:"lucida Grande",Verdana,"Microsoft YaHei";font-size:14px;white-space:normal;background-color:#ffffff;">
My simulation is using one laser beam irradiate on a spherical shell, and this laser beam have a 45 degree angle to x-axis. I used the cylindrical geometry, and from the output hdf5 files, I found that the intensity of laser is not symmetrically on the surface
of the shell. But when i used the cartesian geometry with same 45 degree incident laser, the intensity on the shell is uniform and symmetrically.
</div>
<div style="font-family:"lucida Grande",Verdana,"Microsoft YaHei";font-size:14px;white-space:normal;background-color:#ffffff;">
<br>
</div>
<div style="font-family:"lucida Grande",Verdana,"Microsoft YaHei";font-size:14px;white-space:normal;background-color:#ffffff;">
I guess here are some problems when i'm seting up the laser beam. My laser setup in the .par file is as follows:
</div>
<div style="font-family:"lucida Grande",Verdana,"Microsoft YaHei";font-size:14px;white-space:normal;background-color:#ffffff;">
<br>
</div>
<div style="font-family:"lucida Grande",Verdana,"Microsoft YaHei";font-size:14px;white-space:normal;background-color:#ffffff;">
<div>
useEnergyDeposition = .true.
</div>
<div>
ed_maxRayCount = 20000
</div>
<div>
ed_gradOrder = 2
</div>
<div>
<br>
</div>
<div>
# Activate 3D-in-2D ray trace:
</div>
<div>
ed_laser3Din2D = .true.
</div>
<div>
ed_laser3Din2DwedgeAngle = 0.1
</div>
<div>
<br>
</div>
<div>
### LASER IO OPTIONS ###
</div>
<div>
ed_useLaserIO = .true.
</div>
<div>
ed_laserIOMaxNumberOfPositions = 10000
</div>
<div>
ed_laserIOMaxNumberOfRays = 128
</div>
<div>
<br>
</div>
<div>
### SETUP LASER PULSES ###
</div>
<div>
ed_numberOfPulses = 1<span style="white-space:pre-wrap;"> </span>
</div>
<div>
<br>
</div>
<div>
# Define Pulse 1:
</div>
<div>
ed_numberOfSections_1 = 4<span style="white-space:pre-wrap;"> </span>
</div>
<div>
<br>
</div>
<div>
ed_time_1_1 = 0.0
</div>
<div>
ed_time_1_2 = 0.01e-09
</div>
<div>
ed_time_1_3 = 0.50e-09
</div>
<div>
ed_time_1_4 = 0.51e-09
</div>
<div>
<br>
</div>
<div>
ed_power_1_1 = 0.0
</div>
<div>
ed_power_1_2 = 1.52e+012
</div>
<div>
ed_power_1_3 = 1.52e+012
</div>
<div>
ed_power_1_4 = 0.0
</div>
<div>
<br>
</div>
<div>
<br>
</div>
<div>
### SETUP LASER BEAM ###
</div>
<div>
ed_numberOfBeams = 1
</div>
<div>
<br>
</div>
<div>
# Setup Gaussian Beam:
</div>
<div>
<br>
</div>
<div>
ed_lensX_1 = 10.0<span style="white-space:pre-wrap;"> </span>
</div>
<div>
ed_lensZ_1 = 10.0
</div>
<div>
ed_lensY_1 = 0.0
</div>
<div>
ed_lensSemiAxisMajor_1 = 3.0e-01
</div>
<div>
<br>
</div>
<div>
ed_targetX_1 = 212.0e-04
</div>
<div>
ed_targetZ_1 = 212.0e-04
</div>
<div>
ed_targetY_1 = 0.0
</div>
<div>
<br>
</div>
<div>
ed_targetSemiAxisMajor_1 = 225.0e-04
</div>
<div>
ed_targetSemiAxisMinor_1 = 225.0e-04
</div>
<div>
<br>
</div>
<div>
ed_pulseNumber_1 = 1
</div>
<div>
ed_wavelength_1 = 0.351
</div>
<div>
ed_crossSectionFunctionType_1 = "gaussian2D"
</div>
<div>
ed_gaussianExponent_1 = 4.0
</div>
<div>
ed_gaussianRadiusMajor_1 = 212e-04
</div>
<div>
ed_gaussianRadiusMinor_1 = 212e-04
</div>
<div>
ed_numberOfRays_1 = 4096
</div>
<div>
ed_gridType_1 = "radial2D"
</div>
<div>
ed_gridnRadialTics_1 = 64
</div>
<div>
ed_semiAxisMajorTorsionAngle_1= 0.0
</div>
<div>
ed_semiAxisMajorTorsionAxis_1 = "x"
</div>
</div>
<div style="font-family:"lucida Grande",Verdana,"Microsoft YaHei";font-size:14px;white-space:normal;background-color:#ffffff;">
<br>
</div>
<div style="font-family:"lucida Grande",Verdana,"Microsoft YaHei";font-size:14px;white-space:normal;background-color:#ffffff;">
<br>
</div>
<div style="font-family:"lucida Grande",Verdana,"Microsoft YaHei";font-size:14px;white-space:normal;background-color:#ffffff;">
And in mesh parameters:
</div>
<div style="font-family:"lucida Grande",Verdana,"Microsoft YaHei";font-size:14px;white-space:normal;background-color:#ffffff;">
geometry = "cylindrical"<span style="white-space:pre-wrap;"> </span>
</div>
<div style="font-family:"lucida Grande",Verdana,"Microsoft YaHei";font-size:14px;white-space:normal;background-color:#ffffff;">
<br>
</div>
<div style="font-family:"lucida Grande",Verdana,"Microsoft YaHei";font-size:14px;white-space:normal;background-color:#ffffff;">
And, this shell is a hollow spherical shell with outer radius 300 microns and inner radius 150 microns.
</div>
<div style="font-family:"lucida Grande",Verdana,"Microsoft YaHei";font-size:14px;white-space:normal;background-color:#ffffff;">
<br>
</div>
<div style="font-family:"lucida Grande",Verdana,"Microsoft YaHei";font-size:14px;white-space:normal;background-color:#ffffff;">
So, what should i do to let the intensity of the laser on the shell to be symmetrically to the 45 degree incident axis?
</div>
<div style="font-family:"lucida Grande",Verdana,"Microsoft YaHei";font-size:14px;white-space:normal;background-color:#ffffff;">
<br>
</div>
<div style="font-family:"lucida Grande",Verdana,"Microsoft YaHei";font-size:14px;white-space:normal;background-color:#ffffff;">
Thank you for your attention and help !
</div>
<div style="font-family:"lucida Grande",Verdana,"Microsoft YaHei";font-size:14px;white-space:normal;background-color:#ffffff;">
<br>
</div>
<div style="font-family:"lucida Grande",Verdana,"Microsoft YaHei";font-size:14px;white-space:normal;background-color:#ffffff;">
Best regards,
</div>
<div style="font-family:"lucida Grande",Verdana,"Microsoft YaHei";font-size:14px;white-space:normal;background-color:#ffffff;">
<br>
</div>
<div style="font-family:"lucida Grande",Verdana,"Microsoft YaHei";font-size:14px;white-space:normal;background-color:#ffffff;">
<hr align="left" style="margin:0px 0px 10px;border-top:0px;border-right:0px;border-left:0px;border-bottom-style:solid;border-bottom-color:#e4e5e6;height:0px;line-height:0;font-size:0px;padding:20px 0px 0px;width:50px;">
<div style="font-family:Verdana;">
<div>
<span style="font-size:small;">Ke Fang</span>
</div>
<div>
<span style="line-height:22.1px;font-size:x-small;"><br>
</span>
</div>
<div>
<span style="line-height:22.1px;font-size:x-small;">phd student</span>
</div>
<div>
<span style="line-height:22.1px;font-size:x-small;">Chinese Academy of Sciences</span>
</div>
</div>
</div>
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</blockquote>
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</div>
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</blockquote>
<span id="m_5853046075679043878cid:0881EF10-9C37-4011-8F1A-5FE879142424"><45degree_cartesian.PNG></span><span id="m_5853046075679043878cid:20BB5A07-7D96-4795-97B4-255083219973"><45degree_cylindrical.PNG></span>
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</blockquote>
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</blockquote>
</blockquote>
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</blockquote>