The UK programme of high power target developments for a Neutrino Factory is centred on the study... more The UK programme of high power target developments for a Neutrino Factory is centred on the study of high-Z materials (tungsten, tantalum). A description of lifetime shock tests on candidate materials is given as part of the research into a solid target solution. A fast high current pulse is applied to a thin wire of the sample material and the lifetime measured from the number of pulses before failure. These measurements are made at temperatures up to ~2000 K. The stress on the wire is calculated using the LS-DYNA code and compared to the stress expected in the real Neutrino Factory target. It has been found that tantalum is too weak to sustain prolonged stress at these temperatures but a tungsten wire has reached over 26 million pulses (equivalent to more than ten years of operation at the Neutrino Factory). An account is given of the optimisation of secondary pion production from the target and the issues related to mounting the target in the muon capture solenoid and target stat...
EMMA is the world's first non-scaling fixed field alternating gradient accelerator and is bei... more EMMA is the world's first non-scaling fixed field alternating gradient accelerator and is being constructed at the STFC Daresbury Laboratory. Experience from the initial commissioning phases (from early 2010) will be reported and lessons for future machines of a similar type will be discussed. The present experimental status and future plans will also be reported.
The Non Scaling Fixed Field Alternating Gradient EMMA has a compact linear lattice. Effect of Fri... more The Non Scaling Fixed Field Alternating Gradient EMMA has a compact linear lattice. Effect of Fringe Field on the beam has to be studied carefully. A numerical magnetic field map is generated by magnet measurements or magnet design softwares. We developed a technique that produces from the numerical field map, a dynamical map for a particle travelling in the entire EMMA cell for a reference energy without acceleration. Since the beam dynamics change with energy, a set of maps have been produce with different reference energies between 10 and 20MeV. For each reference energy, simulated tune and time of flight (TOF) have been compared with results in Zgoubi - tracking directly through numerical field map. The range of validity of a single map has been investigated by tracking particle with large energy deviation. From that, a sensible acceleration scheme has been implemented.
CERN - pbar p collider. Study of heavy flavour production in events with a large PT muon accompan... more CERN - pbar p collider. Study of heavy flavour production in events with a large PT muon accompanied by jets.
The UK programme of high power target developments for a Neutrino Factory is centred on the study... more The UK programme of high power target developments for a Neutrino Factory is centred on the study of high-Z materials (tungsten, tantalum). A description of lifetime shock tests on candidate materials is given as part of the research into a solid target solution. A fast high current pulse is applied to a thin wire of the sample material and the lifetime measured from the number of pulses before failure. These measurements are made at temperatures up to ~2000 K. The stress on the wire is calculated using the LS-DYNA code and compared to the stress expected in the real Neutrino Factory target. It has been found that tantalum is too weak to sustain prolonged stress at these temperatures but a tungsten wire has reached over 26 million pulses (equivalent to more than ten years of operation at the Neutrino Factory). An account is given of the optimisation of secondary pion production from the target and the issues related to mounting the target in the muon capture solenoid and target stat...
EMMA is the world's first non-scaling fixed field alternating gradient accelerator and is bei... more EMMA is the world's first non-scaling fixed field alternating gradient accelerator and is being constructed at the STFC Daresbury Laboratory. Experience from the initial commissioning phases (from early 2010) will be reported and lessons for future machines of a similar type will be discussed. The present experimental status and future plans will also be reported.
The Non Scaling Fixed Field Alternating Gradient EMMA has a compact linear lattice. Effect of Fri... more The Non Scaling Fixed Field Alternating Gradient EMMA has a compact linear lattice. Effect of Fringe Field on the beam has to be studied carefully. A numerical magnetic field map is generated by magnet measurements or magnet design softwares. We developed a technique that produces from the numerical field map, a dynamical map for a particle travelling in the entire EMMA cell for a reference energy without acceleration. Since the beam dynamics change with energy, a set of maps have been produce with different reference energies between 10 and 20MeV. For each reference energy, simulated tune and time of flight (TOF) have been compared with results in Zgoubi - tracking directly through numerical field map. The range of validity of a single map has been investigated by tracking particle with large energy deviation. From that, a sensible acceleration scheme has been implemented.
CERN - pbar p collider. Study of heavy flavour production in events with a large PT muon accompan... more CERN - pbar p collider. Study of heavy flavour production in events with a large PT muon accompanied by jets.
The PAMELA (Particle Accelerator for MEdicaL Applications) project is to design an accelerator fo... more The PAMELA (Particle Accelerator for MEdicaL Applications) project is to design an accelerator for proton and light ion therapy using non-scaling Fixed Field Alternating Gradient (FFAG) accelerators, as part of the CONFORM project, which is also constructing the EMMA electron model of a non-scaling FFAG at Daresbury. This paper presents an overview of the PAMELA design, and a discussion of the design goals and the principles used to arrive at a preliminary specification of the accelerator.
Uploads
Papers