All functions in the description of the PLOT command (f1, f2 ... f6) may depend on the following set of variables: ------------------------------------------------------------------------ Symbol Meaning Note ------------------------------------------------------------------------ X, Y, Z Position R, PHI for polar cells EX, EY, EZ, E E-field at (x,y,z) ER, EPHI for polar cells EWX, EWY, EWZ, EW Weighting at (x,y,z) EWR, EWPHI for polar cells BX, BY, BZ, B B-field at (x,y,z) only if there is a B-field VDX, VDY, VDZ, VD Local e- drift velocity VDR, VDPHI for polar cells TIME_E Drift time for electrons TIME_ION Drift time for ions STATUS_E Drift status for electrons a number, not a string STATUS_ION Drift status for ions a number, not a string Q_E Charge induced by an e- Q_ION Charge induced by an ion ------------------------------------------------------------------------ Other variables can be added on request.
Additional Information on:
Produces a plot of the lines of equal function values. The contours are labeled with the function value if the LABEL option is on (which is by default the case). The function is computed on the part of the viewing plane that is located within the current AREA box. If you request AUTOMATIC scaling of the range, contours are drawn at decent function heights covering the range of the function on the AREA. The number of contours is used to compute a rough distance between two contours; the distance is rounded downwards. The number of contours actually drawn may therefore be larger than the number you request. [The default function is Q_E, the charge induced on the read-out electrode by an electron drifting from (x,y,z). The contour range is by default adjusted automatically. By default, about 20 contours are plotted.]
The function is evaluated on the track or on the curve specified with the ON keyword. The geometric aspects of the track, if used, should be set by means of the TRACK command before calling PLOT. Other aspects of the track, such as the clustering model, are not used in the present context. A curve should be parametrised in terms of T which will run from 0 to 1. All 3 coordinates of the curve should be specified. Note that ON expects only one argument, the parametrisation should therefore be enclosed in quotes, e.g. 'cos(pi*t),sin(pi*t),0' would be appropriate to describe a semi-circle in the z=0 plane. The SCALE option can be used to force a vertical scale in the plot, this can for instance be useful if you intend to overlay various graphs. If you select the PRINT option, then the values plotted in the graph will also be printed out. Output re-routing (> file) can be used to write the values to a file. The number of sampling points can be set with N. [The default function is Q_E, the charge induced on the read out electrode by an electron drifting from (x,y,z). The default number of sampling points is MXLIST, 200 or 1000 depending on the compilation parameters.]
The function is sampled at GRID by GRID points on the part of the current viewing plane that is located inside the AREA box. The function values are entered in an histogram. This kind of plot can be useful to estimate for instance the spread in drift time over a given region. The automatic search for proper binning (AUTOMATIC) uses the first few entries to set the range. Since the grid is scanned in a regular sequence, these entries are not necessarily representative for the entire sample, in particular if the number of bins is small compared to the grid size. See CALL -> BOOK_HISTOGRAM -> options -> AUTOMATIC for details on the automatic binning procedure. [The default function is Q_E, the charge induced on the read out electrode by an electron drifting from (x,y,z). The default preset to 100 and the range is by default chosen automatically.]
The function is sampled at GRID by GRID points on the part of the current viewing plane that is located inside the AREA box. The function values are presented as a three dimensional plot. The plot is first rotated by phi degrees around the z-axis and then tilted by theta degrees from the z-axis. This plot is decorative but it is generally agreed upon that it is hard to extract any meaningful information from it ... [The default function is Q_E, the charge induced on the read out electrode by an electron drifting from (x,y,z). The default viewing angles are 30 and 60 degrees.]
This plot shows the flow of a 3-vector sampled at GRID by GRID points on the part of the current viewing plane that is located inside the AREA box. The vectors are displayed like geometrical objects. The z-component is set to 0, if not explicitely specified. For other than (x,y) views, this may give incorrect impressions. It is advisable to have roughly equal ranges in view of the scaling that is performed on the vectors. [The default functions are EWX, EWY, EWZ, i.e. the weighting field.]
The number of the sense wire group for which you wish to have the field plotted. This number can be found in the output of the SELECT command without arguments. By default, all sense wire groups are plotted.
The number of any wire of the sense wire group for which you wish to have the field plotted. These numbers can be found in the output that is produced in response to the CELL-PRINT option of the cell section, and of the PRINT-CELL command in the optimisation section.
Since the induced currents are not the same for all copies of periodic cells, a separate field can be computed for each such copy. Accurate results for other copies than the basic one are non-trivial to obtain in periodic cells. See also the FOURIER instruction. By default, the basic cell is assumed.