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Recent progress in Laser Plasma Accelerators has demonstrated the possibility of generating GeV electron bunches with very interesting beam qualities. It is now conceivable that the further development of such devices could generate beams... more
Recent progress in Laser Plasma Accelerators has demonstrated the possibility of generating GeV electron bunches with very interesting beam qualities. It is now conceivable that the further development of such devices could generate beams with emittance, energy spread and peak current suitable for FEL operation in the XUV range with relatively short undulator trains. In this context the OPALS project aims at the construction of a XUV radiation source, driven by a Laser Plasma Accelerator, capable of generating ultrashort fs XUV pulses. Such a source is small enough to be hosted in an academic or industrial institution and could therefore have a major impact on time-resolved science
ABSTRACT The vacuum window and in-beam ion detection of a radiobiological endstation have been studied using the Monte Carlo particle transport code MCNPX 2.5.0, investigating the effects of different elements on an incident beam of 50... more
ABSTRACT The vacuum window and in-beam ion detection of a radiobiological endstation have been studied using the Monte Carlo particle transport code MCNPX 2.5.0, investigating the effects of different elements on an incident beam of 50 MeV protons. The scattering and energy spread as well as secondary particle generation are analysed. A 200 nm thick silicon nitride vacuum window was found to have the least effect on the incident beam, giving an energy spread of 5.01(8)× 10−4 MeV. Placing a silicon pixel detector before the sample caused scattering of the beam of around 15 μm in radius; too much to be used for experiments targeting individual nuclei.
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... Synchrotrons are very flexible, but the need to ramp the magnets limits the repetition rate to a few Hertz. In principle, an FFAG could produce variable energy extraction at a high repetition rate. ... However, this too was a... more
... Synchrotrons are very flexible, but the need to ramp the magnets limits the repetition rate to a few Hertz. In principle, an FFAG could produce variable energy extraction at a high repetition rate. ... However, this too was a remarkable experience, as recalled by Manny Paschos. ...
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One of the potential advantages of charged particle therapy is the reduction in the risk of radiation-induced malignancies compared with x-ray tele-therapy. Several studies, using the standard radioprotection model, have shown that the... more
One of the potential advantages of charged particle therapy is the reduction in the risk of radiation-induced malignancies compared with x-ray tele-therapy. Several studies, using the standard radioprotection model, have shown that the risk is reduced by a factor of 2-15 depending on the anatomical [for full text, please go to the a.m. URL]
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For the PAMELA project, the injection layout for both protons as well as carbon 6 ions is discussed. The injection system would consist of a 30 MeV cyclotron for protons and a chain of elements for carbon ions such as ECR ion source,... more
For the PAMELA project, the injection layout for both protons as well as carbon 6 ions is discussed. The injection system would consist of a 30 MeV cyclotron for protons and a chain of elements for carbon ions such as ECR ion source, bending magnets and focusing solenoids; RFQ, IH/CH structures and a stripping foil. The charge particle simulation for both protons and carbon ions passing through the elements has been carried out via General Particle Tracer (GPT) software.
Several 14 Ω-e+ pairs of which 11.4±3.8 are consistent with the decay Ωc0→ Ω-e+ve were reconstructed. The probability that a background fluctuation was observed is 7.6×10-5. The measured Β·σ is (42.2±14.1±5.7) fb
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Data from NA31 experiment at CERN have been used to measure the decay KS → γγ. From 69 candidate events of the type K0 → γγ, 52 events can be attributed to KL → γγ and one event is expected from background processes. The ratio of the... more
Data from NA31 experiment at CERN have been used to measure the decay KS → γγ. From 69 candidate events of the type K0 → γγ, 52 events can be attributed to KL → γγ and one event is expected from background processes. The ratio of the relative decay widths R = Γ(KS → γγ)Γ(KL → γγ) is measured to be R = 2.2 ± 1.0(stat.) ± 0.3(syst.) ± 0.2(ext.) where the external systematic error is due to the experimental uncertainty in the branching ratio of the decay KL → γγ. This translates into a branching ratio of BR(KS → γγ) = (2.2 ± 1.1) × 10−6. If these data are combined with the published data from an earlier data taking period with the same experiment, the ratio R is determined to be R = 2.35 ± 0.75(stat.) ± 0.4(syst.) + 7.5 · (1 − BR(KL → γγ)5.86 × 10−4) where the last term accounts for the dependence on the measured KL → γγ branching ratio. The corresponding branching ratio for KS → γγ is BR(KS → γγ) = (2.4 ± 0.9) × 10−6. The measurement is a sensitive test of chiral perturbation theory and in good agreement with theoretical predictions.
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The NA48 experiment offers a four fold improvement in statistical and systematic error over earlier measurements of the magnitude of the direct CP (Charge-Parity) violation of the neutral Kaon system. This requires maximum event readout... more
The NA48 experiment offers a four fold improvement in statistical and systematic error over earlier measurements of the magnitude of the direct CP (Charge-Parity) violation of the neutral Kaon system. This requires maximum event readout efficiency, controlled event building and fast monitoring of run time errors. The event data flow in particular must be sustained at 100 Mbyte/s. The Data
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Research Interests: Materials Engineering, Physics, Condensed Matter Physics, Nuclear Physics, Cyclotron, and 14 moreCancer Therapy, Case Study, Magnetic Resonance, Proton Therapy, Particle Accelerator, Proton, Magnet, Medical Application, Particle Acceleration, Electrical And Electronic Engineering, Superconducting magnets, Magnetic resonance image, Charged Particles, and Electromagnetic coil
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A search for the decay KL→π0e+e- has been performed at the CERN SPS. One candidate event has been found, compatible with an expected background of 1.5 events. The corresponding upper limit for the branching ration is Γ(KL→π0e+e-) Γ(KL →... more
A search for the decay KL→π0e+e- has been performed at the CERN SPS. One candidate event has been found, compatible with an expected background of 1.5 events. The corresponding upper limit for the branching ration is Γ(KL→π0e+e-) Γ(KL → all)<4×10-8 with 90% confidence. © 1988
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Data from the NA31 experiment at CERN have been used for a search for the decay mode KL --&amp;gt; pi0pi0gamma. After all cuts, three events remain in the signal region with an estimated background of 2.2 +/- 0.9 events. The upper... more
Data from the NA31 experiment at CERN have been used for a search for the decay mode KL --&amp;gt; pi0pi0gamma. After all cuts, three events remain in the signal region with an estimated background of 2.2 +/- 0.9 events. The upper limit for the branching ratio of KL --&amp;gt; pi0pi0gamma is 5.6 × 10-6 at the 90% confidence level. Funded
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Skip to main content. CERN Logo CERN Document Server. Related links. CDS; Indico; Library; Bulletin; EDMS. Main navigation links: Search; Submit; Help; Your CDS: Your alerts; Your baskets; Your searches. login. Home > Articles ...
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The status of PAMELA (Particle Accelerator for MEdicaL Applications) ¿ an accelerator for proton and light ion therapy using a non-scaling FFAG (ns-FFAG) accelerator ¿ is reviewed and discussed.
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Barr, Giles David; Carosi, D; Coward, DH; Cundy, Donald C; Doble, Niels T; Gatignon, L; Gibson, V; Grafström, P; Van der Lans, J; Nelson, HN; Wahl, H; Peach, Kenneth J; Blümer, H; Kleinknecht, K; Mayer, P; Renk, B; Augé, E; Chase, Robert... more
Barr, Giles David; Carosi, D; Coward, DH; Cundy, Donald C; Doble, Niels T; Gatignon, L; Gibson, V; Grafström, P; Van der Lans, J; Nelson, HN; Wahl, H; Peach, Kenneth J; Blümer, H; Kleinknecht, K; Mayer, P; Renk, B; Augé, E; Chase, Robert L; Fournier, D; Iconomidou-Fayard, L ...
I have been asked to submit a revised version of this chapter, published almost a decade ago. However, I think that it is better to leave the historical record as it was—this was an article written in its time and for its time. If I was... more
I have been asked to submit a revised version of this chapter, published almost a decade ago. However, I think that it is better to leave the historical record as it was—this was an article written in its time and for its time. If I was writing this article today, I would call it “The Future of Particle Physics—Beyond the LHC”, in recognition of the fact that, when originally written, the LHC was still under construction and now it has been operating for several years. The other key event which informed the original article was the recently-developed European Strategy for Particle Physics, adopted by the CERN Council in July 2006; the strategy was updated in 2013 and formally adopted in May of that year [1]; as I write, the process of updating the strategy is under way.
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ABSTRACT