RF-excited carbon dioxide lasers: concerns of RF occupational exposures.
Proceedings of the International Laser Safety Conference, Cincinnati, Ohio, November 27-30, 1990. Charscan SS, ed., Orlando, FL: Laser Institute of America, 1991 Jan; :3-3
Radiofrequency (RF) exposures were measured during the use of a RF excited carbon-dioxide laser. Measurements were made on a 5 kilowatt (kW) carbon-dioxide laser at an industrial laser manufacturing facility. The laser under study contained an RF generator which produced up to 40kW at a frequency of 13.56 megahertz (MHz). Measurements were made under normal operating conditions and under worst case conditions with all cabinet doors open, side panels raised, and all interlocks bypassed. Measurements made during operation of the laser indicated that no RF or body current levels were detected above the lowest meter indicating level (LMIL) when the laser was in its conventional operating mode. The operator was sufficiently protected from the RF field by the inherent shielding. When the laser was operating in a worst case mode, there were some measurements obtained above the LMIL. Such a mode could occur during maintenance or service work. According to the authors, results indicate that it is possible for manufacturers to design laser systems which produce RF radiation and do not leak under normal or maintenance operations.
Radiation-exposure; Occupational-exposure; Radiation-shielding; Laser-radiation; Nonionizing-radiation; Lasers; Electromagnetic-radiation
Proceedings of the International Laser Safety Conference, Cincinnati, Ohio, November 27-30, 1990