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Hi Norman, Yes, it was quarter plane. It just that from the picture I do not see a quarter plane, it is more like a half plane. Regards, Stepan On 3/11/14, 3:28 AM, Graf, Norman A. wrote: > Hello Stepan, > The field I released was the quarter plane B_Y at y=0. > The file was named b18d36.dat. > Norman > > ________________________________________ > From: Stepan Stepanyan [[log in to unmask]] > Sent: Monday, March 10, 2014 7:25 PM > To: McCormick, Jeremy I. > Cc: Nelson, Timothy Knight; hps-software; Graf, Norman A. > Subject: Re: update on HPS 3d mag field > > Jeremy, > > I think you are showing only field distribution what is in the file, > which is > only half plane (X, Z) for Z<=0. If you let me know which files did you use > I can comment on X points. In the field maps points were generated for X=0 > to X=25 cm with steps of 1 cm. In addition, Z=0 for the field map should > have > correspond to the center of the magnet, which is not in the picture, I > think. > > In the attachment I am sending a zip file which has field maps for > central field > of 5000G. Just want to make sure we are talking about the same maps. > > Hope this will help. > > Regards, Stepan > > On 3/10/14, 7:14 PM, McCormick, Jeremy I. wrote: >> Hi, Tim/Stepan, >> >> What about the field display do you think is wrong vis-a-vis the input field map? >> >> I’m in contact with the Geant4 developers on this, so it would be good to know so I can request a fix. Tim, I wasn’t sure what you meant on this. >> >> As far as the extent of the field map in -Z, I think that this is something that needs to be done in the conversion from the unfolded single plane set of points to the 3D version. Norman must have that code/script, but I haven’t seen it. This would be good to put into the SVN someplace (sandbox even) so it can be improved. >> >> —Jeremy >> >> On Mar 10, 2014, at 7:46 AM, Stepan Stepanyan <[log in to unmask]> wrote: >> >>> Hi TIm, >>> >>> Yes, I suspected that it might be a visualization issue. >>> The reason I was not sure is that I can see the same as you described >>> about colors and arrows but simply as 1/2 field with Z=0 not at the >>> center of the magnet. >>> >>> Thanks, Stepan >>> On 3/10/14 10:36 AM, Nelson, Timothy Knight wrote: >>>> Hi Stepan, >>>> >>>> I think the problems at this point are all due to the visual representation. Colors and arrow lengths are field strength, red being large and green to blue being relatively smaller. I am not sure why the field is cut off on the downstream side, but still well past z=0, in this image but I'm pretty sure that's a problem with the visualization based on the map data I saw that goes into this. >>>> >>>> Tim >>>> >>>> Sent from my iPad >>>> >>>>> On Mar 7, 2014, at 8:48 AM, "Stepan Stepanyan" <[log in to unmask]> wrote: >>>>> >>>>> Hello Jeremy, >>>>> >>>>> Thanks for implementing the field. I am not sure how much I should trust >>>>> the visual picture, but the field you have is generated from the middle of >>>>> the magnet (in Z), so if I am reading the picture correctly, field is >>>>> shifted >>>>> relative to the magnet. For completeness the same (X,+Z) distribution must >>>>> be repeated for (X,-Z) half plane. >>>>> One of things we have discussed with Norman some time ago is the need >>>>> for a full 3-D field map (B_x, B_y, B_z) for (X, Y, Z) points. Will be >>>>> good to >>>>> know this early on. >>>>> >>>>> Regards, Stepan >>>>> >>>>>> On 3/6/14 7:28 PM, McCormick, Jeremy I. wrote: >>>>>> Hi, >>>>>> >>>>>> I made a few fixes to SLIC/LCDD for the support of 3D magnetic field maps. The map’s offsets were not being set correctly, and I believe this is now fixed in the HEAD configuration of SLIC in ilcinstall. >>>>>> >>>>>> I also added the missing field data to the SVN at hps/java/trunk/fieldmap which is referenced by the detector that includes the field map. >>>>>> >>>>>> I was able to get simple visualization working with the 10.00.p01 release of Geant, and the best picture I have so far is this: >>>>>> >>>>>> http://www.slac.stanford.edu/~jeremym/hps/field/hps_field7.png >>>>>> >>>>>> This visualization tool is at an “alpha” stage of development in that project, unfortunately, but it at least gives some idea that the field has been loaded in successfully. >>>>>> >>>>>> That’s the good news. >>>>>> >>>>>> The bad news is that the performance is approximately 150x worse when using the 3D field in a Proposal2014 geometry compared to a setup with the simplistic fixed dipole. This compares the HPS-Proposal2014-v5-2pt2 detector with HPS-Proposal2014-v4-fieldmap using the event file egs_tri_2.2gev_0.00125x0_200na_5e5b_30mr_001.stdhep. >>>>>> >>>>>> So it appears to me this is not really going to be useable in large scale simulation production until the algorithm for retrieving and interpolating the field values has been significantly optimized. >>>>>> >>>>>> —Jeremy >>>>>> ######################################################################## >>>>>> Use REPLY-ALL to reply to list >>>>>> >>>>>> To unsubscribe from the HPS-SOFTWARE list, click the following link: >>>>>> https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=HPS-SOFTWARE&A=1 >>>>> ######################################################################## >>>>> Use REPLY-ALL to reply to list >>>>> >>>>> To unsubscribe from the HPS-SOFTWARE list, click the following link: >>>>> https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=HPS-SOFTWARE&A=1 >>>> ######################################################################## >>>> Use REPLY-ALL to reply to list >>>> >>>> To unsubscribe from the HPS-SOFTWARE list, click the following link: >>>> https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=HPS-SOFTWARE&A=1 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the HPS-SOFTWARE list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=HPS-SOFTWARE&A=1