Changes for page 17A-16 Tesla Coil

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19	19	The assistant will catalogue each material, the duration of the electro-static discharge and any immediately observable changes, e.g. discolouration, combustion, etc. The material samples will be stored for future inspection.
20	20
21	21	**Science background:** Dust Devils on Mars produce strong electromagnetic emissions and could lead to arcing on equipment. Dust events on Earth caused by triboelectric charging of saltating and colliding sand and dust particles produce strong electric fields in terrestrial dust events, sometimes in excess of 100 kV/m. However, Martian dust devils can reach up to 7km height with a diameter of several hundreds of meters. The dust devils have up to 70 times the local atmospheric particle density (corresponding to concentrations of more than 10 billion particles per cubic meter). Due to the low atmospheric density, electrical discharge occurs at an electric field gradient between ∼5 and 20 kV/m on Mars, much lower than the ∼3,000kV/m on Earth.
	22	+
	23	+= Results =
	24	+
	25	+== Material samples ==
	26	+|=Sample|=Description|=Time in discharge(s)|=Notes
	27	+|1A|External suit material|45|Test stopped due to material starting to burn
	28	+|1B|External suit material|32|Test stopped due to material starting to burn
	29	+|2A|Suit underwear|19|Test stopped due to material catching fire
	30	+|2B|Suit underwear|13|Test stopped due to material catching fire
	31	+|3|Plexiglass visor|11|Localised heating lead to hole and start of fire
	32	+|4|Painted aluminium (white)|60|Very small holes seen in paint layer, aluminium unaffected
	33	+|5|Painted wood (white)|27|Sample started to burn on one edge
	34	+
	35	+== Electronics ==
	36	+