The probability of spin re-orientation is estimated for polarized protons accelerated in a cyclotron in which the field falls off with increasing radius and varies azimuthally. Beam extraction is also considered. The depolarization probabilities are shown to be both small....
Next, the detector was irradiated with 17.5 MeV protons at beam intensities of up to 1.3 nA using the research Beam Transfer Line (BTL) of the IBA Cyclone 18 MeV cyclotron in operation at the Bern University Hospital (Inselspital), which is used as an irradiation facility for multi-disciplin...
The Synchrocyclotron and the PS: a comparison1 September 1960 In the summer of 1960, the Courier compared and contrasted the 600 MeV Synchrocyclotron (CERN’s first accelerator) and the 28 GeV Proton Synchrotron, which had accelerated its first protons the previous year. The vacuum system ...
the search for abnormal metabolic pathways that can be therapeutically exploited drastically accelerated, leading to the discovery of oncogenes and tumour suppressor genes that are the basis for alternative metabolic pathways in cancer. The uncontrolled cell proliferation, increased cell survival, cell diff...
Electromagnetic radiation is strongly absorbed by a magnetized plasma if the radiation frequency equals the cyclotron frequency of plasma electrons. It is ... G Shvets,Wurtele, J - 《Physical Review Letters》 被引量: 96发表: 2002年 Electron acceleration by electromagnetic waves in a weakly magneti...
For the parameters characteristic of the flaring region, our calculations suggest that the termination shock formed in the reconnection outflow region (above post-flare loops) could accelerate electrons to a kinetic energy of a few MeV within 100 ion cyclotron periods, which is of the order of ...
The accelerated beam is extracted from the cyclotron, flattened by means of the optical elements of the BTL and collimated into an area larger than the one occupied by the target material. The protons encounter thin aluminum discs used to degrade their energy on target, which was calculated by...
A four-rod RFQ which enables to obtain a continuous variation of the frequency is presented and experimental results of the electrical tests are given. The construction of a prototype to accelerate protons using frequencies in the 50 MHz range is proposed....
Tumour growth data obtained for the mice irradiated with the continuous cyclotron reference and LPA proton beam are shown in Fig.3c,d. By comparison with the corresponding curves for growth controls and sham irradiations, a clear radiation-induced effect is indicated. A strongly delayed onset of ...
This leads to a shadow fringe pattern as indicated in b, which is shifted in the presence of a force (blue trajectories). Finally, the antiprotons are detected with a spatially resolving emulsion detector. To infer the force, the shifted position of the moire´ pattern has to be compared...