Return-Path: Received: from [149.220.60.110] (account huebl@hzdr.de [149.220.60.110] verified) by hzdr.de (CommuniGate Pro SMTP 6.1.12) with ESMTPSA id 16164094 for picongpu-users@hzdr.de; Fri, 13 Jan 2017 17:00:34 +0100 Subject: Re: [PIConGPU-Users] Electron density asymmetry To: picongpu-users@hzdr.de References: From: Axel Huebl X-Enigmail-Draft-Status: N1110 Organization: HZDR Message-ID: <6ff22edc-c9d2-d1c4-3bf0-e6f66c0612f1@hzdr.de> Date: Fri, 13 Jan 2017 17:00:33 +0100 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Hi Danila, the LWFA example is a bit rought, too close to the border, has a unrealistic few-cycle laser pulse (5fs!), etc., which can heavily influence the formation of the bubble. But still: what you see is a rather random snapshot from some plane position at some random time of the wake. To get a better picture, read the density from the HDF5 output and vary the plane along y. Also, better take a longer pulse. Does that result in a more physical picture then? :) Best, Axel On 13.01.2017 16:46, Khikhlukha Danila wrote: > Dear all, > I've noticed a strange electron density asymmetry on the pictures > provided by the pngModule. > > As an example I'm using PoG 0.2.1 standard LWFA example with all default > settings. The computational grid is specified like `TBG_gridSize="-g > 128 256 128"` with no moving window. I have noticed that the shape of > the wake wave is not circular in the transversal direction. Please find > a picture attached to illustrate the issue. > It looks a bit strange to me as the laser pulse has a circular > polarization and grid size/step are the same in both transversal > directions. This "rectangular" shape of the wake wave puzzles me a bit... > > Best regards, > Danila. > > > ############################################################# > This message is sent to you because you are subscribed to > the mailing list . > To unsubscribe, E-mail to: > To switch to the DIGEST mode, E-mail to > To switch to the INDEX mode, E-mail to > Send administrative queries to > -- Axel Huebl Phone +49 351 260 3582 https://www.hzdr.de/crp Computational Radiation Physics Laser Particle Acceleration Division Helmholtz-Zentrum Dresden - Rossendorf e.V. Bautzner Landstrasse 400, 01328 Dresden POB 510119, D-01314 Dresden Vorstand: Prof. Dr.Dr.h.c. R. Sauerbrey Prof. Dr.Dr.h.c. P. Joehnk VR 1693 beim Amtsgericht Dresden