is a great way to convert just about anything automatically. Area, angles,
energy, force, power, pressure, speed, it's all in there, even cooking and
currency. This is the caffiene-fueled brainchild of Lily Hammond, engineering
student at NCSU.
Go to IBM Patent Search and look
5,763,812 for a "Compact Personal Rail Gun" filed in 1995. It
is an educational introduction, if you can read through the legalese. His
design detects the projectile position by measuring the inductance of the
.HV Community has very active discussions
of high voltage and linear accelerator topics. This is where I hang out.
eGroups Femm Board
is where users can share ideas about FEMM, the finite element magnetics
eFusion Consortium is a top-notch
marketing and communications company that I've been involved in.
MWS Wire provides all kinds of magnet wire, and has
even written me to say they are eager to sell small lots to hobbyists like us!
WireTron manufactures wires for electromagnets and
other applications. They offer a handy piece of free software to help understand and choose
magnet wire. Get it!
Hart Scientific and INSCO is the calibration
laboratory for all types of measurement devices. They provide ISO accredited calibration services for
research equipment, laboratory equipment and measurement weights.
Tribology: Rtec Instruments specializes in
design and manufacturing of high tech instruments such as tribometers, 3d profilometer,
stress tester and atomic force microscope etc.
Finite-Element Analysis Programs
FEMM, a free package supported by
Dr. David Meeker, is an excellent choice for coilgun modelling.
The FEMM Tutorial by
David Meeker (based on Ian Stokes-Rees tutorial) is an essential introduction to using FEMM.
QuickField by Tera
Analysis does magnetic field plots for user-defined configurations. Highly graphical
and relatively easy to set up 3d configurations. The student edition is a free 3MB download
but the limit of 200 nodes will prevent you from solving real problems.
Solenoid Physlet is
a Java applet for a novel visualization of the magnetic field around a solenoid. This is part
of the Web Physics pages by Davidson College.
Field Precision creates 2D and 3D finite-element programs
for electrostatics, magnet design, thermal transport, charged-particle devices, electromagnetic
analysis and radiation transport in materials. The programs are moderately priced for consultants,
universities and small companies. Their web site also features several
educational items available for download at no charge, including an educational version
of 2D software for electrostatics and magnetostatics, a complete package for 3D time-domain
electromagnetic simulations, and textbooks on charged-particle acceleration and physics.
Magnet Formulas is a small web site devoted
to the vanishing art of practical magnet design without FEA (Finite Element Analysis). It offers
a number of very useful formulas.