Recently, it was proposed to use negatively charged electron beams for compensation of beambeam effects due to protons in the Tevatron collider [1]. We show that a similar compensation is possible in space-charge dominated low energy proton beams. The idea has a potential of severalfold increase of the FNAL Booster beam brightness. Best results will be obtained using three electron lenses aroun...

The authors attempt to establish the relative biological effectiveness (RBE) calculation for designing therapeutic proton beams on the basis of microdosimetry. The tissue-equivalent proportional counter (TEPC) was used to measure microdosimetric lineal energy spectra for proton beams at various depths in a water phantom. An RBE-weighted absorbed dose is defined as an absorbed dose multiplied by...

PURPOSE To evaluate the dosimetric characteristics of a two-dimensional (2D) diode array detector irradiated with passively scattered proton beams. MATERIALS AND METHODS A diode array detector, MapCHECK (Model 1175, Sun Nuclear, Melbourne, FL, USA) was characterized in passive-scattered proton beams. The relative sensitivity of the diodes and absolute dose calibration were determined using a ...

Vacuum arc ion sources and filament driven multi cusp ion sources are used for the production of high current ion beams of a variety of metallic and gaseous ions at the GSI accelerator facility. For the future project FAIR (Facility of Antiproton and Ion Research) it is foreseen to provide in addition to the existing ion beams a high current proton beam from a separate linear accelerator (plina...

The spatial energy distributions of beams of protons accelerated by ultrahigh intensity (>10(19)Wcm2) picosecond laser pulse interactions with thin foil targets are investigated. Using separate, low intensity (<10(13)Wcm2) nanosecond laser pulses, focused onto the front surface of the target foil prior to the arrival of the high intensity pulse, it is demonstrated that the proton beam profile c...

Recently, it was proposed to use negatively charged electron beams for compensation of beam-beam effects due to protons in the Tevatron collider [1]. We show that a similar compensation is possible in space-charge dominated low energy proton beams. The idea has a potential of several-fold increase of the FNAL Booster beam brightness. Best results will be obtained using three electron lenses aro...

The successful demonstration of PIAVE superconducting RFQ (SRFQ) resonator gives the opportunity of new applications, making possible the construction of compact CW accelerators, driven by small RF systems. In this paper, we outline the basic principles of SRFQ design, and discuss the possible applications to the acceleration of Exotic Ion beams and intermediate intensity proton beams for Posit...

There is substantial interest in providing slow-spill external proton beams in parallel with “interaction running” at the 20 TeV SSC collider. The proposal is to cause a flux of particles to impinge on a target consisting of a bent crystal extraction ‘channel.13 Additionally, a slow spill onto a conventional internal target could be used as a source of secondary beams for physics or test purpos...

Proton beam therapy has been gaining popularity in the management of a wide spectrum of cancers. However, little is known about the effect of proton beams on epigenetic alterations. In this study, the effects of proton beams on DNA methylation were evaluated in the breast cell lines MCF-10A and MCF-7. Pyrosequencing analysis of the long interspersed element 1 (LINE1) gene indicated that a few s...

Two chargeand current neutral plasma beams are modelled with a onedimensional PIC simulation. The beams are uniform and unbounded. The relative speed between both beams is 0.4c. One beam is composed of electrons and protons and one out of protons and negatively charged oxygen (dust). All species have the temperature 9 keV. A Buneman instability develops between the electrons of the first beam a...