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Garfield Version 4.11 - Forthcoming Release

  Rob Veenhof, IPN Orsay

The major new features of the forthcoming release of Garfield (W5050) is an interface with finite element programs such as Maxwell, plus some improvements in the Heed interface.

CELL section:

Addition of an interface to read field maps generated by finite element electrostatics programs such as Maxwell. This in particular enables one to use Garfield in applications with dielectrics. Interfaces to files generated by other programs than Maxwell can be added.

MAGNETIC-FIELD section:

No changes

OPTIMISATION section:

No changes.

FIELD section:

No changes.

GAS section:

As recommended by the author of Magboltz, Steve Biagi/University of Liverpool, the default set of cross-sections for 'CO' sub 2 used by MAGBOLTZ has been changed from those derived by Phelps and Bulos to those calculated by Nakamura, slightly modified in the low-energy region. The Phelps and Bulos cross-sections are still available as CO2-OLD while the unmodified Nakamura cross-sections are known as CO2-NAKAMURA. The agreement with the Zhao et al. data [NIM A340 (1994) 485] has significantly improved with this modification.

You can see a picture (PS) at URL: http://consult.cern.ch/writeup/garfield/examples/mudt/new_CO2.ps

DRIFT section:

The TIMING instruction has been revised in the light of Heed-generated tracks and Monte Carlo drift line integration.

SIGNAL section:

Users are reminded that it is important to select a clustering model with the TRACK statement prior to a signal calculation. The default clustering model (a fixed number of clusters at regular intervals) is not suitable for signal calculations.

Graphics:

The numerical parameters used to compute contours can be modified with the command !CONTOUR-PARAMETERS. This is useful when plotting unusually twisted contours and when plotting contours in a very small area.

The labels on the contours used to be placed in too small gaps when HIGZ was used as graphics systems. This has been fixed.

Histograms, Matrices, Formulae and Calls:

No changes.

Datasets and input / output:

No changes.

Global options:

A command-line option -noprofile (Unix) or /NOPROFILE (Vax/VMS) has been added to disable reading a .garfinit or GARFINIT.DAT file.

Compilation:

As a result of the change in the command-line options, the CLD file on Vax/VMS has changed and needs to be recompiled.

Documentation

Currently, the most accurate description of the program can be found in the on-line help (1); the printed manual is not available at the moment, lacking SGML at CERN. A set of examples (2) and full documentation (3) can be found on the Web. 

(1) http://consult.cern.ch/writeup/garfield/help
(2) http://consult.cern.ch/writeup/garfield/examples/examples.html
(3) http://consult.cern.ch/writeup/garfield
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Next: Text Processing Up: cnl227.html Previous: An Introduction to the M Language

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