Athousandleaves posted up a link to a DIY particle accelerator -
A HOME-MADE ACCELERATOR Can Altineller Kadikoy Anadolu Lisesi, Dr. Esat IsÄ±k Cad., Moda, Istanbul, Turkiye
The topic discussed within this paper is a construction of an accelerator with amateur gadgets. The aim was the understanding of the research capabilities of such device. Nearly all equipment was supplied from the hobby market. Some experimentsÂ were carried out, and the results are presented; also some tips about construction are presented.
DIY particle accelerator – Link (PDF).