http://iffwww.iff.kfa-juelich.de/~wuttke/doku/ 2010-03-15T17:15:47+01:00 http://iffwww.iff.kfa-juelich.de/~wuttke/doku/ http://iffwww.iff.kfa-juelich.de/~wuttke/doku/lib/images/favicon.ico text/html 2010-03-15T15:35:29+01:00 Sebastian Busch (sbusch@129.187.179.90) http://iffwww.iff.kfa-juelich.de/~wuttke/doku/doku.php?id=frida:frida1:inst&do=diff1268663729 “Frida-1” installation instruction being part of the ongoing FRIDA project. This page contains for the moment installation instructions for FRIDA-1 on a Linux PC. The installation procedure depends on whether you need to compile the pro... text/html 2010-03-10T13:52:56+01:00 Joachim Wuttke (jwu@172.25.45.34) http://iffwww.iff.kfa-juelich.de/~wuttke/doku/doku.php?id=spheres:spheres_bibliography&do=diff1268225576 This is the authorative list of publications resulting from experiments performed at the Jülich backscattering spectrometer SPHERES. For publications about the spectrometer, see backscattering bibliography. 2010 W. Doster, S. Busch, A. M. Gaspar... text/html 2010-03-09T22:38:04+01:00 Joachim Wuttke (jwu@84.153.40.75) http://iffwww.iff.kfa-juelich.de/~wuttke/doku/doku.php?id=spheres:coding_style&do=diff1268170684 SPHERES Technical Documentation: Coding Style C Programming Style C-Code einheitlich formatiert mit for I in */*.[ch]; do indent -kr -prs -nsai -nsaw -nsaf $I; done Strenges ISO C; Verifikation mit Compiler-Option gcc -g -std=c99 Im Gegensatz... text/html 2010-03-09T22:37:28+01:00 Joachim Wuttke (jwu@84.153.40.75) http://iffwww.iff.kfa-juelich.de/~wuttke/doku/doku.php?id=spheres:techdoc&do=diff1268170648 This is part of the SPHERES online handbook. Team members see also spheres-intern. Neutronics, Geometry neutronic design — vertical focussing — detector numbering — standard samples — test results Electronics and Compu... text/html 2010-03-04T15:24:36+01:00 Joachim Wuttke (jwu@195.83.126.10) http://iffwww.iff.kfa-juelich.de/~wuttke/doku/doku.php?id=jwu:publications-chron&do=diff1267712676 Joachim Wuttke: publications (see also: talks and posters) Most of my papers are available online. “restricted” means that the publisher of the journal restricts full-text access to IP’s from research institutions that have subscr... text/html 2010-02-19T11:13:09+01:00 Joachim Wuttke (jwu@84.153.2.169) http://iffwww.iff.kfa-juelich.de/~wuttke/doku/doku.php?id=jwu:home&do=diff1266574389 Dr. Joachim Wuttke Jülich Centre for Neutron Science Institut für Festkörperforschung Forschungszentrum Jülich Außenstelle am FRM-II Lichtenbergstraße 1 85747 Garching bei München Tel. +49 89 2891 0715 (office) Tel. +49 89 2891 4875 (laborato... text/html 2010-02-19T11:10:26+01:00 Joachim Wuttke (jwu@84.153.2.169) http://iffwww.iff.kfa-juelich.de/~wuttke/doku/doku.php?id=spheres:data_analysis&do=diff1266574226 This is part of the SPHERES user manual. We are currently developping the following tools: slaw: Read raw histograms, subtract empty-can measurement, normalise to vanadium measurement, save scattering law S(q,w) in a variety of data formats. Fr... text/html 2010-02-19T11:05:17+01:00 Joachim Wuttke (jwu@84.153.2.169) http://iffwww.iff.kfa-juelich.de/~wuttke/doku/doku.php?id=spheres:spheres&do=diff1266573917 Register now for the first JCNS School on Data Analysis for Quasielastic Neutron Scattering with FRIDA (Garching, 28-29 April 2010): http://www.jcns.info/DataAnalysis2010/ SPHERES online handbook SPHERES is a third-generation neutron backscatter... text/html 2010-02-19T11:04:06+01:00 Joachim Wuttke (jwu@84.153.2.169) http://iffwww.iff.kfa-juelich.de/~wuttke/doku/doku.php?id=start&do=diff1266573846 Documentation maintained by Joachim Wuttke: SPHERES backscattering spectrometer explog current log intern calendar schedule slaw: neutron-histogram to scattering-law converter Frida: Fast reliable interactive data analysis bug tracker alte_wu... text/html 2010-02-12T19:52:13+01:00 Joachim Wuttke (jwu@84.153.41.137) http://iffwww.iff.kfa-juelich.de/~wuttke/doku/doku.php?id=jwu:talks_and_posters&do=diff1266000733 Joachim Wuttke: recent talks and posters (see also: publications) (formatted for use in the Jülich annual report) 2010 JCNS Vortrag (intern) Theory of Bragg Scattering by Moving Crystals and Optimisation of a Phase-Space-Transform Chopper for the ... text/html 2010-02-06T12:08:52+01:00 Joachim Wuttke (jwu@84.153.21.253) http://iffwww.iff.kfa-juelich.de/~wuttke/doku/doku.php?id=frida:installation&do=diff1265454532 This is part of the Frida online handbook. Requirements Operating system At present, only Linux is actively supported. As most tests are done in a Debian or Ubuntu environment, we are grateful for feedback if there are difficulties with other ... text/html 2010-01-22T16:48:25+01:00 Joachim Wuttke (jwu@172.25.45.34) http://iffwww.iff.kfa-juelich.de/~wuttke/doku/doku.php?id=spheres:elastic_scans&do=diff1264175305 Parameters: lpf (acq.par.tscan_lines_per_file) spl (acq.par.tscan_seconds_per_line) typical values lpf = 60 (s), spl = 15, resulting in one subfile covering lpf x spl = 900 s. For the moment, this product determines the time resolution of the fin... text/html 2010-01-22T16:36:49+01:00 Joachim Wuttke (jwu@172.25.45.34) http://iffwww.iff.kfa-juelich.de/~wuttke/doku/doku.php?id=spheres:instrument_control&do=diff1264174609 This is part of the SPHERES User Manual. sic: the Graphic User Interface In perspective, routine operation can be done fully from the graphic user interface sic (SPHERES interactive control). To start sic, log in as user bsguest on u1.spheres.fr... text/html 2010-01-14T15:18:46+01:00 Joachim Wuttke (jwu@172.25.45.34) http://iffwww.iff.kfa-juelich.de/~wuttke/doku/doku.php?id=spheres:principle&do=diff1263478726 This is part of the SPHERES online handbook. The instrument is located at the end of the cold neutron guide NL6. A mechanical velocity selector transmits a wavelength band of ± 6%. The neutrons enter the instrument housing through a convergent ne... text/html 2009-11-05T10:56:01+01:00 Carlos Pardo (pardolui@147.83.136.125) http://iffwww.iff.kfa-juelich.de/~wuttke/doku/doku.php?id=frida:frida1:tut_susceptibility&do=diff1257414961 Susceptibility is defined as: Xq ' ' (w)=S(q,w)/(exp(hw/KBT)-1)-1 and Xq it is expected to factorize as: Xq(w)=hq*X(w) (see PRE 61 3 2730 (2000), Wuttke et al.), confer to Making a master curve _sgto convert input y(x,z) to another representat... text/html 2009-10-28T12:37:06+01:00 Sebastian Busch (sbusch@129.187.179.90) http://iffwww.iff.kfa-juelich.de/~wuttke/doku/doku.php?id=frida:quick_tutorial&do=diff1256729826 This tutorial is intended only to show how to use the data analysis program Frida to make some basic actions such as see the data, and perform simple fittings. However, Frida has much more possibilities which you can explore... First of all, you ha... text/html 2009-09-20T14:34:25+01:00 Joachim Wuttke (jwu@89.55.249.31) http://iffwww.iff.kfa-juelich.de/~wuttke/doku/doku.php?id=frida:frida&do=diff1253450065 Welcome to FRIDA central. This content management system is used to build up documentation of the FRIDA data analysis system. Source code will be released through sourceforge (http://sourceforge.net/projects/frida/). FRIDA is software for scientifi... text/html 2009-09-11T13:09:27+01:00 Joachim Wuttke (jwu@172.25.45.34) http://iffwww.iff.kfa-juelich.de/~wuttke/doku/doku.php?id=spheres:samples_cells&do=diff1252667367 This is part of the SPHERES User Manual. Sample Geometry The sample size is subject to the following constraints: Maximum diameter 55 mm to fit in our cryostat. The cross section illuminated by the neutron beam has about width 30 mm and height... text/html 2009-09-11T13:08:10+01:00 Joachim Wuttke (jwu@172.25.45.34) http://iffwww.iff.kfa-juelich.de/~wuttke/doku/doku.php?id=spheres:sample_environment&do=diff1252667290 This is part of the SPHERES User Manual. Janis Cryostat / Cryofurnace Temperature ranges: low-T mode high-T mode low-T stick 3.5 to 310 K 290 to 500 K high-T stick 30 to 310 K 290 to 700 K Geometry: tube diameter: 60 mm allowab... text/html 2009-06-24T10:28:51+01:00 Joachim Wuttke (jwu@172.25.45.34) http://iffwww.iff.kfa-juelich.de/~wuttke/doku/doku.php?id=spheres:energy_scale&do=diff1245832131 SPHERES Technical Documentation: energy scale Linear term Jülich standard: positive energy means sample energy gain ⇒ neutron looses energy in sample ⇒ E_i > E_f ⇒ E_i > E_Bragg ⇒ neutron gains energy by Doppler shift &r...