Atomic Physics and Radiation | Physics A. Helmholtz Coils
A pair of precision coils with 4mm terminals and 400 turns of copper wire are wound on former of about 150 mm diameter. The coil is comprised of a support rod, which fits on the holders of the track system supplied, which enables them to be aligned on a common axis for measurements and study of the magnetic fields. Normally used in pairs, each coil has 4 mm terminals and their distance apart is adjusted over the track supplied. The maximum current in the coil is 1A to avoid overheating. Direction of current is marked on each coil. Min & Max distance coils can
be a part: 1.75” to 12” 6.5” tall , 11” Long 6.5” wide. CP00051630
B. Spark Discharge Apparatus
The Spark Discharge Apparatus is an extremely visual and audible demonstration of the ionisation of air caused by Alpha particles. As an Alpha source is moved along the brass mesh, Alpha particles ionise the air, causing a conductive path to form from the mesh to the conductor below, causing a shower of bright sparks and a crackling sound. Moving the source along the track clearly demonstrates that the sparks follow the source.
Requires an alpha source and EHT (5kV) power supply
E8R07784 £81.84 £79.82 A
B
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