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Your search keyword '"Pozimski, J. K."' showing total 4 results
Start Over Author "Pozimski, J. K." Topic ion sources
4 results on '"Pozimski, J. K."'

1. Commissioning the Front End Test Stand High Performance H- Ion Source at RAL.

Author

Faircloth, D. C., Lawrie, S., Letchford, A. P., Gabor, C., Wise, P., Whitehead, M., Wood, T., Perkins, M., Bates, M., Savage, P. J., Lee, D. A., and Pozimski, J. K.

Subjects
ION sources, PROTON accelerators, PARTICLES (Nuclear physics), NEUTRON sources, PHYSICS research
Abstract

The RAL Front End Test Stand (FETS) is being constructed to demonstrate a chopped H- beam of up to 60 mA at 3 MeV with 50 p.p.s. and sufficiently high beam quality for future high-power proton accelerators (HPPA). High power proton accelerators with beam powers in the several megawatt range have many applications including drivers for spallation neutron sources, neutrino factories, waste transmuters and tritium production facilities. The aim of the FETS project is to demonstrate that chopped low energy beams of high quality can be produced and is intended to allow generic experiments exploring a variety of operational conditions. This paper details the first stage of construction- the installation and commissioning of the ion source. Initial performance figures are reported. [ABSTRACT FROM AUTHOR]

Published
2009
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2. Plasma meniscus and extraction electrode studies of the ISIS H- ion source.

Author

Lawrie, S. R., Faircloth, D. C., Letchford, A. P., Gabor, C., and Pozimski, J. K.

Subjects
NUCLEAR physics instruments, ELECTRON cyclotron resonance sources, ION sources, CAPILLARITY, SURFACE tension, PROPERTIES of matter
Abstract

In order to reduce the emittance and increase the transported beam current from the ISIS Penning-type H- ion source, improvements to the extraction system are required. This ion source is currently being commissioned on the front end test stand at the Rutherford Appleton Laboratory, which demands higher extraction energies, higher beam currents, and smaller emittances. To facilitate this, the present geometry requires optimization. This paper details the experimental and simulation studies performed of the plasma meniscus and the possible electrode geometry modifications needed to extract the highest quality beam. [ABSTRACT FROM AUTHOR]

Published
2010
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3. The front end test stand high performance H- ion source at Rutherford Appleton Laboratory.

Author

Faircloth, D. C., Lawrie, S., Letchford, A. P., Gabor, C., Wise, P., Whitehead, M., Wood, T., Westall, M., Findlay, D., Perkins, M., Savage, P. J., Lee, D. A., and Pozimski, J. K.

Subjects
INDUSTRIAL lasers, FREQUENCIES of oscillating systems, RADIO measurements, INDUSTRIAL productivity measurement, RADIO frequency, ION sources
Abstract

The aim of the front end test stand (FETS) project is to demonstrate that chopped low energy beams of high quality can be produced. FETS consists of a 60 mA Penning Surface Plasma Ion Source, a three solenoid low energy beam transport, a 3 MeV radio frequency quadrupole, a chopper, and a comprehensive suite of diagnostics. This paper details the design and initial performance of the ion source and the laser profile measurement system. Beam current, profile, and emittance measurements are shown for different operating conditions. [ABSTRACT FROM AUTHOR]

Published
2010
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4. Diagnostic experiments at a 3 MeV test stand at Rutherford Appleton Laboratory (United Kingdom).

Author

Gabor, C., Faircloth, D. C., Lee, D. A., Lawrie, S. R., Letchford, A. P., and Pozimski, J. K.

Subjects
RADIO frequency, FREQUENCIES of oscillating systems, ION sources, RADIO measurements, COMPENSATION (Psychology)
Abstract

A front end is currently under construction consisting of a H- Penning ion source (65 keV, 60 mA), low energy beam transport (LEBT), and radio frequency quadrupole (3 MeV output energy) with a medium energy beam transport suitable for high power proton applications. Diagnostics can be divided either in destructive techniques such as beam profile monitor, pepperpot, slit-slit emittance scanner (preferably used during commissioning) or nondestructive, permanently installed devices such as photodetachment-based techniques. Another way to determine beam distributions is a scintillator with charge-coupled device camera. First experiments have been performed to control the beam injection into the LEBT. The influence of beam parameters such as particle energy and space-charge compensation on the two-dimensional distribution and profiles will be presented. [ABSTRACT FROM AUTHOR]

Published
2010
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