A second stripper for an EN or FN tandem accelerator

A second stripper has frequently been installed, part way down the high-energy acceleration tube, in an MP or other very large tandem to achieve a higher particle energy and charge state. In an EN, FN or similar accelerator the space available in the dead section is very small, approximately 4'' in length and little more than the tube diameter transversely. The 4'' length must also accommodate the flexible bellows and vacuum seals that are necessary between the individual acceleration tubes. A stripper housing 22 foils 0.75'' diameter has been built and successfully installed, in this space, on the FN tandem accelerator at Florida State University. This accelerator has always operated with a 0.75'' diameter aperture in this position so no loss of beam transmission occurs. (orig.)