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Details of A robot for the cancellations

Developed from the investigators of the Infn a fantoccio anthropomorhic in order to measure the received doses of cancellation on the flights of line and in other atmospheres.

Jimmy, hung is called little more than 50 kilograms and ago long travels in airplane, but he is not a passenger like all the others. Draft of a fantoccio from the human, vaguely able shape to be moderate the amount of cosmic cancellation that the body of a person receives in a normal intercontinental flight. Jimmy has been put to point from a group of investigators of the section of Turin of the National Institute for Nuclear Physics (Infn), under the direction of Zanini Dawn and is studied in order to estimate in particularly accurate way the neutronica member of the cosmic cancellation.

The Alitalia accommodates it just in these months on its aircrafts in order to control the dose received from the travelling staff: in fact the crew is exposed to the cosmic cancellations in occasion of the flight activities and the international directives demand to the airlines to execute periodicals controls on the various routes. The particles that constitute the cosmic cancellations are of varied type and between of they, beyond to neutrons, there are between other protons, electrons and photons. The neutrons have an ability to produce damage to the cells from 5 to 20 times greater of that one of i beams X and range. They moreover constitute a type of particularly important cancellation to the quotas the intercontinental flights in how much approximately represent the 50 percento to the dose total.

Some woven and organs of the human body are particularly sensitive to the biological effects of the cancellations, as an example the tiroide, the bony marrow and the lungs, and consequently it is important to know the dose of such cancellations due to the neutrons that is absorbed from these leaves of our body. Therefore Jimmy has been realized under shape of fantoccio anthropomorhic in which, to the inside of cavity localized in correspondence of the mainly radiosensibili human organs, are lodges as many to you dosimetri: everyone of they measure the energy rilasciata from neutrons to the organs in issue and is realized with substances that simulate the composition of the human woven ones. Naturally, since the modality with which happens the release of energy to the woven ones is complex much, they are necessary appropriate technical materials and of measure in order to obtain one correct appraisal of the neutronica dose.

The entire system accurately is tested in order to verify of the reliability, let alone calibrated using various neutroniche sources, near the Joint Research Center of Ispra (Goes) of the European Community and in the laboratories of the CERN of Geneva. Carefullied lay down on two seats of a common airliner and investigator to its flank, Jimmy already has been experimented on two intercontinental routes to January: that equatorial Rome-Buenos Aires-Milan and the polar route Rome-Tokio-Milan. The ways have been chosen considering that the flights that journey on the polar routes receive amount of greater cancellations regarding that they cover broken off equatorial, since the land magnetic field has a various effect shielding on the cosmic cancellation incident.

The fantoccio therefore it has allowed to determine with one technical of the all innovative absorbed neutronica dose during a flight. This new integral series of data the dose appraisals acclimatizes them that they come regularly carried out, according to procedures standard, from the experts of the Alitalia who take care of prevention and protection of the navigating staff with the characterized supervision of the expert one for the cosmic cancellations. "Thanks to Jimmy, can be confirmed that the travelling staff to edge of the intercontinental flights receives in the arc of the year, habitually, an equal additional dose to approximately once and half the bottom of natural radioactivity that everyone of we absorbs every day on the earth in the life", emphasizes Lorenzo Visca, the physical young person of the Infn that has been the official companion of the mockup in its transoceanici flights.

Beyond that on the airliners, Jimmy comes used in other situations in which it is necessary to know the dose of neutrons absorbed a human being. Always in the within of the measures in high atmosphere, but this time without companion, Jimmy in june 2001 has flown from Bottoming drills to Seville to edge of launch stratospheric footballs from the Agency Spaces them Italian (Asi), in order to estimate the dose that would be absorbed to highest quotas from the pilots of airplane experiences them of new generation, which will be able to catch up the 30 kilometers of altitude. Moreover the fantoccio it has been already used, in various Italian and European hospitals, near the equipment used for the radioterapici treatments of the tumors. In these situations in fact, although the patients are irraggiati with a bundle of range beams concentrated on the zone to deal, secondary undesired neutron member produces itself also one, originates to you from the interaction of the range beams with the apparatus. These neutrons are diffused in the atmosphere, and are opportune to estimate of the dose in order to optimize the treatment.

Other measures finally have been completed to the laboratory Grey Head of the Cnr, situated to 3.480 meters on the massive one of the Cervino, like preliminary study in order to determine the dose absorbed from the populations that live in high mountain, for which more are elevated the natural bottom which had to the ionizzanti cancellations of cosmic origin. Watching to the future, for the sophisticated mockup others are shown interesting applications. Jimmy will be one of the first passengers of Boeing 777, a innovation of the Alitalia fleet as far as comfort and technology, that it will travel in the next few months on the route Rome-Buenos Aires, comfortably arranged on 2 of the 293 places available. Jimmy, moreover, could be used in order to measure the neutronica member of the residual bottom of still present cancellation in the area of Chernobyl, in Ucraina, to continuation of the incident of 1986. Finally, the fantoccio it could come employed, after opportune modifications, for measures of absorbed dose to edge of the Station Spaces them International (Iss), in orbit around the Earth.