NOTICt-Thti upon wu pf«(i»>d tt an ac:m>n( o( sponioted 6r fhf (fnlnd Suits Ctivcfumcnl. -Vclth l)i< Unind Sisits r,M ih< Unli«d Suicj Atomic Kncto Cuminltiioo. nar snr <••! (JicU la)icts. na; any of (htV eunitsclors. sutte«ni(acf»r«, at Ihea cmpioyvei. makes any >oic>niy. <«p»iiui tmptind. at auumcs any tf»»l linblllly ot ftipofiiifcUlly fur ihc accuiaef, tornpl'lctiru or ui«fulflc» of tat Infucmallun, a|)p»aiut. pmducl ur (ituctu dtultued, at ecptewnu lhal Us use lJ I W lhutty OVKICI) rifttu. ?1 DISTRIBUTION OF THIS DOCUMENT DOSE DISTRIBUTION KITH MOVING NEGATIVE PlOii SEAMS by Eric Rotigera A4STSACTdense ioniration in the stopping region as negative pious coac to rest in matter Makes theft attractive for trettaent of cancer. Pions of the sane energy have essentially the saae range in natter which means that • •wnoenerfssie feeia will produce * Bragg pesifc region of aaxiwum ionisastion as they cone to rest. In cancer therapy, the entire treatment volume should be exposed, if possible, to the Brags peak. A distribution of energy anil adjustment of J«t«r»l dimensions could theoretically adjust tht Bragg peak to fit into nust any treatment volume but this flight be difficult in practice to accomplish. As an jiJternativ-, ;he bean can be tuned to produce a peak with (mown properties, anil thin peats can be •eved in * controlled wanner so as to sew the treatment volume. For a vertical beas, this Method usually wilt require verticil oscillations of the fc*a* as welt as horizontal Motion to cover the entire volume. Both of th«se motions ctn result in ttmlesirablc dost distributions. It is shown how to avoid or minimise the unwanted eiffects and it is also Shawn now velocity distributions can be determined for unifora effective dose throughoui a trtatwent volume.
We present the dynamical response of a nonlinear system designed for vibrational energy harvesting. The mechanical resonator is composed of two steel beams. The beams are coupled by a screw together at the ends with various distance element. Additionally, two piezoelectric patches are placed on their surface giving output powers on electric loads. In the article, we examine the output powers and dynamics of the system for variable frequency, different sizes of distance elements and several tip mass distributions.
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