Stripper foil

With conventional ERD, all elements lighter than the incident ion are detected and all the other elements are blocked by the stripper foil. The use of a heavier mass incident ion beam, allows a multitude of other different elements to be recoiled forward and detected. In the conventional ERD, the different elemental spectra superimpose on each other and it becomes difficult to sort the separate masses so as to provide unambiguous data on the different elemental depth profiles. 

Carbon films of high conductivity with low activation energy that are very stable, chemically inert, and highly corrosion resistant have a wide range of applications, e.g., as standard resistors, electrode coatings, stripper foils for accelerators, interconnects in circuits, and corrosion-resistant coatings as listed below [191]. 

Proposition 65 s warning requirement has provided an incentive for manufacturers to remove listed chemicals from their products. For example, trichloroethylene, which causes cancer, is no longer used in most correction fluids reformulated paint strippers do not contain the carcinogen methylene chloride and toluene, which causes birth defects or other reproductive harm, has been removed from many nail care products. In addition, a Proposition 65 enforcement action prompted manufacturers to decrease the lead content in ceramic tableware and wineries to eliminate the use of lead-containing foil caps on wine bottles. 

Figure 7.1. A schematic illustration of a cyclotron V alternating voltage, S ion source, A and B dees under vacuum, D carbon foil stripper, W window.

Figure 2 Schematic of the accelerator mass spectrometer at the Centre for AMS at Lawrence Livermore National Laboratory. Negative ions from a muiti-sampie ion source are separated by a low-energy mass spectrometer, accelerated to 6 MeV in an electrostatic accelerator, converted to positive ions by passage through a foil stripper, and accelerated again. Quadruply charged carbon atomic ions (30 MeV kinetic energy) are focused by quadrupole lenses and resolved by high-energy mass spectrometers, followed by velocity selection and identification of charge state in an ionization detector.

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