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ion-source

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WGB17 Development of Large Scale Optimization Tools for Beam Tracking Codes linac, emittance, optics, beam-losses 254
 
  • B. Mustapha, P.N. Ostroumov
    ANL, Argonne, Illinois
 
 

Matrix-based beam optics codes such as TRACE-3D are often used for small scale optimizations such as beam matching which involves a limited number of parameters. The limitation of such codes is further amplified for high-intensity and multiple charge state beams as their predictions start to deviate from the more realistic 3D particle tracking codes. For these reasons we have started developing large scale optimization tools for beam tracking codes. The large scale nature comes first from the possibility of optimizing a large number of parameters and second from the minimum number of particles to track especially for space charge dominated beams. The ultimate goal of these developments is not only to optimize the design of an accelerator but also to be able to use a beam dynamics code to operate it once built. A selected set of optimization options will be presented and discussed along with specific applications. We'll also emphasize the need for parallel computing to speed-up the optimization process.

 

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WGE16 The 40 MeV Proton/Deuteron Linac at SARAF linac, ion, rfq, beam-losses 438
 
  • D. Berkovits, B. Bazak, G. Feinberg, I. Mardor, A. Nagler, J. Rodnizki, A. Shor, Y. Yanay
    Soreq NRC, Yavne
  • K. Dunkel
    ACCEL, Bergisch Gladbach
 
 

The Soreq Applied Research Accelerator Facility (SARAF) is built to be used for basic research, medical research, neutron based non-destructive testing and radio-pharmaceuticals development and production. The accelerator, designed and constructed by Accel Instruments GmbH, starts with a 5 mA, 20 keV/u ECR ion source. A LEBT transports the beam and matches it to a normal-conducting 4-rod RFQ. The RFQ bunches the beam at a frequency of 176 MHz 4 mA ions and accelerate the ions to 1.5 MeV/u. A 0.65 m long MEBT transports and matches the beam into the superconducting linac. The 20 m long linac is composed of six cryostats that contain a total of 44 half-wave resonators optimized for β0=0.09 and 0.15, which are kept at a temperature of 4.5 K by liquid helium. In order to achieve the dose rate criterion for hands-on maintenance, beam loss is limited to 1 nA/m. Extensive beam dynamics simulations, including error analysis with high statistics, indicate that beam loss will indeed be below the above mentioned criterion. Currently, Phase I of the SARAF linac, including the ion source, LEBT, RFQ, MEBT and the first SC cryostat, is installed on site and is undergoing commissioning.

 

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WGF07 Beam Diagnostics at the RAL Front-End Test Stand – First Results and New Ideas diagnostics, emittance, ion, extraction 458
 
  • J.K. Pozimski
    STFC/RAL, Chilton, Didcot, Oxon
  • D.C. Faircloth, S.R. Lawrie, A.P. Letchford
    STFC/RAL/ISIS, Chilton, Didcot, Oxon
  • C. Gabor
    STFC/RAL/ASTeC, Chilton, Didcot, Oxon
  • S. Jolly, D.A. Lee
    Imperial College of Science and Technology, Department of Physics, London
 
 

In order to contribute to the development of high power proton accelerators in the MW range a front end test stand (FETS) is being constructed at the Rutherford Appleton Laboratory (RAL) in the UK. The aim of the FETS is to demonstrate the production of a 60 mA, 2 ms, 50 pps chopped beam at 3 MeV with sufficient beam quality. Therefore a comprehensive set of diagnostic tools have been developed or are in the design and construction phase. To improve the beam quality delivered by the Penning H- ion source using a slit extraction, a pepper pot emittance measurement device and a 2D-transversal profile scanner has been built and used on the ion source development rig and results of the beam measurements will be presented. As destructive diagnostic devices suffer from the high beam power deposited on the device surfaces, two new diagnostic devices based on the photo detachment principle are under construction: A laser wire scanner allowing the reconstruction of the full 2D-transversal density distribution using tomographic techniques and an emittance scanner device. The design and status of construction of both devices will be presented and new ideas for the data analyses discussed.

 

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