[Display Elements] [DST->WIRED] [Known bugs] [Acknowledgements]
The WIRED Event Display allows you to view events at
different orientations and magnifications.
Although it's almost certainly easiest to see the
topology of the event by rotating at random,
you can think of it as dragging the surface of an (invisible) globe centred at
the primary vertex.
Events are converted from the latest processing's shortDST to the WIRED format
- Tracks are displayed from the primary or secondary vertex
to their last-measured point in the tracking detectors
(excluding the muon chambers).
To simplify the display, all tracks without a reconstructed
secondary vertex are forced through the primary vertex.
The primary vertex is defined as the origin (to simplify zooming).
- Calorimeter (HPC, HAC, SAT/STIC, EMF)
energy deposits are shown with a "histogram".
You might notice that these have a slightly odd projective behaviour -
this ensures that it maintains its length, which is proportional
to the energy deposited.
PAs are not shown separately.
- Muon chamber hits (if available) are shown as small squares on the outside.
You may have to Zoom out from the initial scale in
order to see them.
- The jet assignments are shown by the colours on all the above
- The scale and orientation of the detector is implied by the
wire-frame view of the HPC shown in white.
The initial window size represents 10.4 x 6.5 m.
Each zoom in/out magnifies/reduces by a factor of two, giving
|Zoom In|| Factor|| Width (mm)|| Height (mm)|
|-1 ||0.5 ||20800 ||13000|
|0 ||1 ||10400 ||6500|
|1 ||2 ||5200 ||3250|
|2 ||4 ||2600 ||1625|
|3 ||8 ||1300 ||813|
|4 ||16 ||650 ||406|
|5 ||32 ||325 ||203|
|6 ||64 ||163 ||102|
|7 ||128 ||81 ||51|
|8 ||256 ||41 ||25|
|9 ||512 ||20 ||13|
|10 ||1024 ||10 ||6|
des script using d2wired.
- Sometimes the image is not redisplayed after a zoom or
reset. Usually the image will be redrawn when you next click
(though if you were zooming, you will have zoomed twice as far) or
move the mouse pointer into the image area (even a small rotation will
serve to redraw the image).
- At maximum magnification and certain orientations, some tracks
may be shown as not coming from any vertex. This is an artifact of the
display program (there are no single-track vertices!)
and can usually be cured by choosing a different orientation.
- Occasionally, and also most often at maximum magnification, the display
goes into reverse-video (eg. black on red).
- WIRED has a small memory leak whenever one moves between events.
If it is in use for a long time, you may find the system slowing down.
The best way to remedy this is to restart Netscape, though for a short time after
you quit it will refuse to load while the memory is cleared. However,
this problem will probably only occur after several hours of usage.
- Due to a bug/feature of the 1992-5 (Z0) shortDST
production, muon chamber hits often (always?) aren't included.
These seem to be OK for 1996 (and later) data.
Thanks to Mark Dönszelmann of CERN IT/IPT Group for conceiving and
realizing WIRED and for all his changes for this version.
Java and Swing were
developed by Sun Microsystems.
from Microstar Software.
Swing and Ælfred are Java class libraries,
parts of which are included in the downloaded WIRED archive.
The relevant licenses, available from the above-referenced web sites,
should be consulted before attempting to
develop or redistribute this software.
created 11st February 1999 by Tim Adye, <T.J.Adye@rl.ac.uk>