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41<td id="breadcrumb"><a href="../../../index.shtml">Home</a> &gt;
42 <a href="../../index.shtml">Collaboration</a> &gt;
43 <a href="../../working_groups.shtml">Working Groups</a> &gt;
44 Geometry
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49
50<p><center>
51<h1><b>Geometry & Transport Working Group</b></h1>
52</center></p>
53
54<p align="center">
55 [&nbsp;<b><u><A HREF="docs/SRD_geom.pdf">Software Requirements Document</A></u></b>&nbsp;]
56 &nbsp;&nbsp;&nbsp;&nbsp;
57 [&nbsp;<b><u><a href="docs/URD_geom.pdf">Users Requirements Document</a></u></b>&nbsp;]
58 &nbsp;&nbsp;&nbsp;&nbsp;
59 [&nbsp;<b><u><a href="witems.html">Planned Activities</a></u></b>&nbsp;]
60</p>
61
62<hr>
63<i><small>
64<center>
65 The Geant4 geometry working group is responsible for the development and
66 maintenance of the geometry modeller in the Geant4 toolkit. The development
67 in the Geant4 geometry modeller spawns within the following areas:
68 geometrical shapes, navigation algorithms, detector modelling techniques
69 (volumes positioning), transportation in field and importance biasing
70 techniques.
71</center>
72 <p></p>
73 The Working Group is currently composed by:
74 <ul>
75 <li>Gabriele Cosmo, CERN (<u>coordinator</u> - management, navigation, volumes)</li>
76 <li>John Apostolakis, CERN (<u>deputy-coordinator</u> - field, navigation)</li>
77 <li>Pedro Arce Dubois, CIEMAT (navigation, volumes)</li>
78 <li>Makoto Asai, SLAC (biasing, volumes)</li>
79 <li>Vladimir Grichine, CERN (solids)</li>
80 <li>Ivana Hrivnacova, IN2P3 (g3tog4, volumes)</li>
81 <li>Tatiana Nikitina, CERN (field, solids)</li>
82 </ul>
83</small></i>
84<hr>
85
86<h2><b>Development</b></h2>
87<b>Detector Description</b>
88<ul>
89<li>GDML - Geometry Description Markup Language:
90 <a href="http://cern.ch/gdml">specifications</a><br>
91 - <i><a href="mailto:Gabriele.Cosmo@cern.ch">G.Cosmo</a></i></li>
92</ul>
93<br>
94<b>Solids</b>
95<ul>
96<li>Twisted shapes (<a href="docs/twistedtrap.pdf">PDF</a>)<br>
97 - <i><a href="mailto:Vladimir.Grichine@cern.ch">V.Grichine</a></i></li>
98<li>Using the <i>Surface-Checker</i> test (<a href="docs/surface_checker.pdf">PDF</a>)<br>
99 - <i><a href="mailto:Tatiana.Nikitina@cern.ch">T.Nikitina</a></i></li>
100<li>BREPs <a href="http://cern.ch/radoone/g4/BREPgallery.html">Gallery</a><br>
101 - <i><a href="mailto:Radovan.Chytracek@cern.ch">R.Chytracek</a>, February 2002</i></li>
102</ul>
103<br>
104<b>Cuts by detector region</b>
105<ul>
106<li>Category class diagrams:
107 <a href="docs/regions/geometry-cdiag.ps">Geometry</a>,
108 <a href="docs/regions/processes-cdiag.ps">Processes</a>,
109 <a href="docs/regions/track-cdiag.ps">Track</a>.</li>
110<li>Use cases through interaction diagrams:
111 <ol>
112 <li><a href="docs/regions/ucase1.ps">Standard initialisation</a>
113 <i>(Define region, set cuts, build physics table)</i></li>
114 <li><a href="docs/regions/ucase2.ps">Alternative initialisation</a>
115 <i>(Define production cut, add/remove region)</i></li>
116 <li><a href="docs/regions/ucase3.ps">Step computation and tracking</a>
117 <i>(PostStepDoIt, handling of material-cut-couples)</i></li>
118 </ol></li>
119</ul>
120<br>
121<b>Parallel Navigation</b> <img src="http://cern.ch/geant4/images/new.gif">
122<ul>
123<li><a href="docs/parnav/parallel-navigation.html">Design description</a>.</li>
124<li>Category class diagrams:
125 <a href="docs/parnav/multinav.pdf">Multiple Navigators</a>,
126 <a href="docs/parnav/path_finder.pdf">Path Finder</a>.</li>
127<li>Use cases through interaction diagrams:
128 <ol>
129 <li><a href="docs/parnav/init_scenario.pdf">Standard initialisation</a></li>
130 <li><a href="docs/parnav/tracking_scenario.pdf">Tracking initialisation</a></li>
131 <li><a href="docs/parnav/stepping_scenario.pdf">Stepping interaction</a></li>
132 </ol></li>
133</ul>
134<br>
135<b>Event biasing</b>
136<ul>
137<li>Latest development in importance sampling and scoring:
138 <a href="biasing/Sampling.html">documentation</a><br>
139 - <i><a href="mailto:Alexander.Howard@cern.ch">A.Howard</a></i></li>
140<li>Scoring and geometrical importance sampling
141 <a href="biasing/BiasScoreUseCases.html">use cases</a><br>
142 - <i><a href="mailto:Alexander.Howard@cern.ch">A.Howard</a></i></li>
143</ul>
144<br>
145<b>Tallies</b>
146<ul>
147<li>User Requirements Document
148 (<a href="docs/URD_tallies.pdf">PDF</a>, v.0.2)<br>
149 - <i><a href="mailto:Alexander.Howard@cern.ch">A.Howard</a></i></li>
150</ul>
151
152<hr>
153
154<h2><b>LXR Code Browsing</b></h2>
155<ul>
156<li><a href="http://www-geant4.kek.jp/lxr/source/geometry/">Geometry module</a></li>
157<li><a href="http://www-geant4.kek.jp/lxr/source/processes/transportation/">Transportation module</a></li>
158</ul>
159
160<hr>
161
162<h2><b>Talks</b></h2>
163<ul>
164<li>Reference-counted touchables proposal
165 (<a href="../../../reports/talks/geometry/touchables/index.htm">HTML</a>,
166 <a href="../../../reports/talks/geometry/touchables/g4touchables.ppt">PPT</a>)<br>
167 - <i><a href="mailto:Radovan.Chytracek@cern.ch">R.Chytracek</a>, May 2001</i></li>
168<li>Importance Sampling (geometrical splitting and Russian Roulette)
169 (<a href="docs/u02.pdf">PDF</a>)<br>
170 - <i><a href="mailto:Michael.Dressel@cern.ch">M.Dressel</a>, November 2002</i></li>
171</ul>
172
173<h2><b>Recent Publications</b></h2>
174<ul>
175<li><a href="docs/geometry-chep2006.pdf">CHEP-2006 Proceedings</a>
176 (<i>May 2006</i>)</li>
177</ul>
178
179<h2><b>Tutorial</b></h2>
180<ul>
181<li><a href="training/geo_unit.pdf">School course</a> (<i>May 2005</i>)</li>
182</ul>
183
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209 28 Nov 2008
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