| Popis: |
The Fuego Nuevo II (FN‐II) dense plasma focus device is a small machine (4.6 kJ), operating at the Instituto de Ciencias Nucleares, UNAM, in which neutrons, as well as soft and hard X rays have been studied with a number of diagnostics. Neutrons are studied with silver activation counters, and scintillator‐photomultiplier detectors, while their angular distribution inside and outside the discharge chamber have been studied with CR‐39 plastic track detectors. The soft X rays are studied with a multiple‐pin‐hole camera and PIN diodes, while the hard X‐rays are observed with the scintillator‐photomultiplier detectors mentioned above. When a needle is inserted on the inner electrode, a bright spot of hard x‐rays can be concentrated, and used for the production of high‐contrast radiography. Dosimetric measurements have been made for X‐rays crossing a 300 micron aluminum window, through the axis of the machine, showing an average dose of 0.11±0.01 mGy per shot. In contrast, the average dose with a hollow cathod... |
