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Re: [Imgcif-l] ... also
- To: <imgcif-l@iucr.org>
- Subject: Re: [Imgcif-l] ... also
- From: <Graeme.Winter@Diamond.ac.uk>
- Date: Wed, 17 Feb 2010 08:32:36 -0000
- In-Reply-To: <279aad2a1002161513h77b926b1y239ee4192442e55b@mail.gmail.com>
- References: <4854F2500EA8C4478A508D2D92973E5206D6B2EA@EXCHANGE25.fed.cclrc.ac.uk><alpine.BSF.2.00.1002160753380.66907@epsilon.pair.com><279aad2a1002161513h77b926b1y239ee4192442e55b@mail.gmail.com>
Hi James, Herbert, What you say I think is correct but not complete. For instance, if the fundamental beam size is ~ 120 x 80 microns (as it is on our phase 1 stations here) then slits at 200 x 200 won't mean anything, but slits at 80 x 80 will... Describing all of this information would help to give hints about the expected beam profile - a 40 x 40 "beam" above will likely be pretty uniform. Based on this I would propose: _diffrn_radiation.beam_size_x _diffrn_radiation.beam_size_y To refer to the "fundamental" beam - that which you would receive with no additional collimation - as a FWHM I assume. Then: _diffrn_radiation.collimation_x _diffrn_radiation.collimation_y To refer to the recorded spacing of the slits. I could see in terms of actually recording this information that this would be doable - the former would be a property of the beamline, the latter a data collection choice. Best wishes, Graeme -----Original Message----- From: imgcif-l-bounces@iucr.org [mailto:imgcif-l-bounces@iucr.org] On Behalf Of James Hester Sent: 16 February 2010 23:14 To: The Crystallographic Binary File and its imgCIF application to image data Subject: Re: [Imgcif-l] ... also I agree with Herbert's suggestion, although I would name the tags _diffrn_radiation.beam_size_x _diffrn_radiation.beam_size_y simply because that makes more immediate sense to me. 'Spread' reminds me of 'wavelength spread', 'angular spread', 'vegemite' etc. But that might just be me. I would advocate against the use of a slit width unless enough information is provided to interpret its meaning i.e. location of the slit relative to source/monochromator/sample/other slits. NB The powder CIF dictionary defines beam size tags for the size of the beam at the sample (DDL1, however). James. On Wed, Feb 17, 2010 at 12:05 AM, Herbert J. Bernstein < yaya@bernstein-plus-sons.com> wrote: > Another nice question. We have the angular crossfire in > > _diffrn_radiation.div_x_source > _diffrn_radiation.div_y_source > _diffrn_radiation.div_x_y_source > > Should this new tag be viewed as a characteristic of the beam, say > > _diffrn_radiation.spread_x_source > _diffrn_radiation.spread_y_source > _diffrn_radiation.spread_x_y_source > > or, as Graeme suggests, the width of slits collimating the beam or as > ??? > > Suggestions, please. > > ===================================================== > Herbert J. Bernstein, Professor of Computer Science > Dowling College, Kramer Science Center, KSC 121 > Idle Hour Blvd, Oakdale, NY, 11769 > > +1-631-244-3035 > yaya@dowling.edu > ===================================================== > > On Tue, 16 Feb 2010, Graeme.Winter@Diamond.ac.uk wrote: > > > Hello again, > > > > Is there a way to specify the size of the beam - or at least, the > > gap between the slits? This obviously relates to the question before. > > > > Looking in the dictionary from version 1.5.4 - 2007-07-28 I could > > not find these (this was the latest dictionary I could find in the > > cbflib > > distribution) > > > > Thanks again, > > > > Graeme > > > > Graeme Winter > > Software and MX Support Scientist > > Diamond Light Source > > > > +44 1235 778091 (work) > > +44 7786 662784 (work mobile) > > > > > > > > > > > > -- > > > > This e-mail and any attachments may contain confidential, copyright > > and > or privileged material, and are for the use of the intended addressee only. > If you are not the intended addressee or an authorised recipient of > the addressee please notify us of receipt by returning the e-mail and > do not use, copy, retain, distribute or disclose the information in or > attached to the e-mail. > > > > Any opinions expressed within this e-mail are those of the > > individual and > not necessarily of Diamond Light Source Ltd. > > > > Diamond Light Source Ltd. cannot guarantee that this e-mail or any > attachments are free from viruses and we cannot accept liability for > any damage which you may sustain as a result of software viruses which > may be transmitted in or with the message. > > > > Diamond Light Source Limited (company no. 4375679). Registered in > > England > and Wales with its registered office at Diamond House, Harwell Science > and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, United Kingdom > > > > > > > > > > > > > > > > > > > > _______________________________________________ > > imgcif-l mailing list > > imgcif-l@iucr.org > > http://scripts.iucr.org/mailman/listinfo/imgcif-l > > > _______________________________________________ > imgcif-l mailing list > imgcif-l@iucr.org > http://scripts.iucr.org/mailman/listinfo/imgcif-l > -- T +61 (02) 9717 9907 F +61 (02) 9717 3145 M +61 (04) 0249 4148 _______________________________________________ imgcif-l mailing list imgcif-l@iucr.org http://scripts.iucr.org/mailman/listinfo/imgcif-l -- This e-mail and any attachments may contain confidential, copyright and or privileged material, and are for the use of the intended addressee only. If you are not the intended addressee or an authorised recipient of the addressee please notify us of receipt by returning the e-mail and do not use, copy, retain, distribute or disclose the information in or attached to the e-mail. Any opinions expressed within this e-mail are those of the individual and not necessarily of Diamond Light Source Ltd. Diamond Light Source Ltd. cannot guarantee that this e-mail or any attachments are free from viruses and we cannot accept liability for any damage which you may sustain as a result of software viruses which may be transmitted in or with the message. Diamond Light Source Limited (company no. 4375679). Registered in England and Wales with its registered office at Diamond House, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, United Kingdom _______________________________________________ imgcif-l mailing list imgcif-l@iucr.org http://scripts.iucr.org/mailman/listinfo/imgcif-l
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