Return-Path: Received: from [149.220.60.203] (account rp6038@hzdr.de [149.220.60.203] verified) by hzdr.de (CommuniGate Pro SMTP 6.1.12) with ESMTPSA id 16356798 for picongpu-users@hzdr.de; Wed, 08 Feb 2017 11:50:07 +0100 Message-ID: <589AF7DF.708@hzdr.de> Date: Wed, 08 Feb 2017 11:50:07 +0100 From: Richard Pausch User-Agent: Mozilla/5.0 (X11; Linux i686; rv:31.0) Gecko/20100101 Thunderbird/31.1.1 MIME-Version: 1.0 To: picongpu-users@hzdr.de Subject: Re: [PIConGPU-Users] [PIConGPU-Users] [PIConGPU-Users] Laser pulse polarization References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------080504080900050603010405" This is a multi-part message in MIME format. --------------080504080900050603010405 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Hi Bifeng Lei, Okay - that looks fine (except that you time step is a bit short for numerical stability in long simulation runs, better would be ~1.12969e-16). Why does your picture only show one “imshow cell”/colored cell per ~10-50 cells? Did you reduce the resolution during analysis? Might the transversal structures we see in the picture be an aliasing effect? (can be avoided by setting |plt.imshow( ... , interpolation="nearest"|) Could you please re-plot the picture in 1D, be selecting the center x-position and plotting a lineout of the field along the y-axis with a mark for each value. That would ease determining if there are aliasing effects in the imshow picture. Best, Richard Am 08.02.2017 um 11:37 schrieb Bifeng Lei: > Dear Richard, > > Thank you so much for your reply. > > A 0.8um laser is used. The resolution is given as: > > dx and dz: 0.0743e-6m --> 0.8/0.0743=10.7 > > dy: 0.0443e-6m --> 0.8/0.0443=18 > > dt : 3.0e-17s > > By the way, is there a way to set the polarization angle with respect > to x/z-axis? > > All best > > Bifeng Lei > > > On 02/08/2017 11:28 AM, Richard Pausch wrote: >> longitudinal resolution is too low? > > With best regards, > Ph.D Bifeng Lei > -- > GSI Helmholtzzentrum für Schwerionenforschung GmbH > Planckstraße 1 > 64291 Darmstadt > www.gsi.de > > Gesellschaft mit beschränkter Haftung > Sitz der Gesellschaft: Darmstadt > Handelsregister: Amtsgericht Darmstadt, HRB 1528 > > Geschäftsführung: > Ursula Weyrich, Professor Dr. Karlheinz Langanke, Jörg Blaurock > > Vorsitzender des Aufsichtsrates: Staatssekretär Dr. Georg Schütte > Stellvertreter: Ministerialdirigent Dr. Rolf Bernhardt --------------080504080900050603010405 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit

Hi Bifeng Lei,

Okay - that looks fine (except that you time step is a bit short for numerical stability in long simulation runs, better would be ~1.12969e-16).

Why does your picture only show one “imshow cell”/colored cell per ~10-50 cells?
Did you reduce the resolution during analysis?
Might the transversal structures we see in the picture be an aliasing effect? (can be avoided by setting plt.imshow( ... , interpolation="nearest")

Could you please re-plot the picture in 1D, be selecting the center x-position and plotting a lineout of the field along the y-axis with a mark for each value. That would ease determining if there are aliasing effects in the imshow picture.

Best,
Richard

Am 08.02.2017 um 11:37 schrieb Bifeng Lei:

Dear Richard,

Thank you so much for your reply.

A 0.8um laser is used. The resolution is given as:

dx and dz: 0.0743e-6m --> 0.8/0.0743=10.7

dy: 0.0443e-6m --> 0.8/0.0443=18

dt : 3.0e-17s

By the way, is there a way to set the polarization angle with respect to x/z-axis?

All best

Bifeng Lei

On 02/08/2017 11:28 AM, Richard Pausch wrote:

longitudinal resolution is too low?
With best regards,
Ph.D Bifeng Lei
-- 
GSI Helmholtzzentrum für Schwerionenforschung GmbH
Planckstraße 1 
64291 Darmstadt
www.gsi.de

Gesellschaft mit beschränkter Haftung 
Sitz der Gesellschaft: Darmstadt 
Handelsregister: Amtsgericht Darmstadt, HRB 1528

Geschäftsführung: 
Ursula Weyrich, Professor Dr. Karlheinz Langanke, Jörg Blaurock

Vorsitzender des Aufsichtsrates: Staatssekretär Dr. Georg Schütte 
Stellvertreter: Ministerialdirigent Dr. Rolf Bernhardt

--------------080504080900050603010405--