The NDCX-II engineering design

Waldron, W.L.; Abraham, W.; Arbelaez, Diego; Friedman, A.; Galvin, James E.; Gilson, Erik; Greenway, W.; Grote, D.P.; Jung, Jin‐Young; Kwan, J.W.; Leitner, M.; Lidia, Steven; Lipton, Thomas; Reginato, L.L.; Regis, M.; Roy, P.K.; Sharp, W.M.; Stettler, M.; Takakuwa, J.; Volmering, J.; Vytla, Vamsi

doi:10.1016/j.nima.2013.05.063

Cited by 18 publications

(9 citation statements)

References 20 publications

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“…The calibration of HD-v2 films was performed at the Neutralized Drift Compression Experiment II (NDCX-II) particle accelerator at Lawrence Berkeley National Laboratory (LBNL). [23][24][25] NDCX-II can deliver short helium and now also proton pulses with a pulse duration of 2 to ∼10 ns (full-width at half-maximum, FWHM), as shown in Fig. 1.…”

Section: Calibration Resultsmentioning

confidence: 99%

Absolute calibration of GafChromic film for very high flux laser driven ion beams

Seidl

et al. 2019

Review of Scientific Instruments

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Section: Calibration Resultsmentioning

confidence: 99%

Absolute calibration of GafChromic film for very high flux laser driven ion beams

Seidl

et al. 2019

Review of Scientific Instruments

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“…The possibility of efficient acceleration of these ion species has already been demonstrated within the TNSA regime 13 . With these forseen upgrades, the beamline might enter a comparable parameter regime as the proposed NDCX-II machine 28 .…”

Section: Discussionmentioning

confidence: 99%

Towards highest peak intensities for ultra-short MeV-range ion bunches

Busold

Schumacher

Brabetz

et al. 2015

Sci Rep

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A laser-driven, multi-MeV-range ion beamline has been installed at the GSI Helmholtz center for heavy ion research. The high-power laser PHELIX drives the very short (picosecond) ion acceleration on μm scale, with energies ranging up to 28.4 MeV for protons in a continuous spectrum. The necessary beam shaping behind the source is accomplished by applying magnetic ion lenses like solenoids and quadrupoles and a radiofrequency cavity. Based on the unique beam properties from the laser-driven source, high-current single bunches could be produced and characterized in a recent experiment: At a central energy of 7.8 MeV, up to 5 × 108 protons could be re-focused in time to a FWHM bunch length of τ = (462 ± 40) ps via phase focusing. The bunches show a moderate energy spread between 10% and 15% (ΔE/E0 at FWHM) and are available at 6 m distance to the source und thus separated from the harsh laser-matter interaction environment. These successful experiments represent the basis for developing novel laser-driven ion beamlines and accessing highest peak intensities for ultra-short MeV-range ion bunches.

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“…NDCX-II is a facility that enables such experiments. The linear induction accelerator NDCX-II is designed to deliver short, intense helium ion pulses 1 , up to several tens of nC/pulse, or 10 10 -10 11 ions, with a peak kinetic energy of approximately 1.1 MeV and a repetition rate of one shot every 45 s. The ~12 m long accelerator consists of a helium plasma ion source driven by a filament 2 , induction cells for particle acceleration and axial compression, diagnostic cells and a neutralized drift compression section 3 . Solenoids, with a maximum magnetic field of 2.5 T, in each cell steer and focus the beam radially.…”

Section: Introductionmentioning

confidence: 99%

Design and implementation of a Thomson parabola for fluence dependent energy-loss measurements at the Neutralized Drift Compression eXperiment

Treffert

Seidl

et al. 2018

Review of Scientific Instruments

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The interaction of ion beams with matter includes the investigation of the basic principles of ion stopping in heated materials. An unsolved question is the effect of different, especially higher, ion beam fluences on ion stopping in solid targets. This is relevant in applications such as in fusion sciences. To address this question, a Thomson parabola was built for the Neutralized Drift Compression eXperiment (NDCX-II) for ion energy-loss measurements at different ion beam fluences. The linear induction accelerator NDCX-II delivers 2 ns short, intense ion pulses, up to several tens of nC/pulse, or 10 10 -10 11 ions, with a peak kinetic energy of ~1.1 MeV and a minimal spot size of 2 mm FWHM. For this particular accelerator the energy determination with conventional beam diagnostics, for example, time of flight measurements, is imprecise due to the non-trivial longitudinal phase space of the beam. In contrast, a Thomson parabola is well suited to reliably determine the beam energy distribution. The Thomson parabola differentiates charged particles by energy and charge-to-mass ratio, through deflection of charged particles by electric and magnetic fields. During first proof-of-principle experiments, we achieved to reproduce the average initial helium beam energy as predicted by computer simulations with a deviation of only 1.4 %. Successful energy-loss measurements with 1 μm thick Silicon Nitride foils show the suitability of the accelerator for such experiments. The initial ion energy was determined during a primary measurement without a target, while a second measurement, incorporating the target, was used to determine the transmitted energy. The energy-loss was then determined as the difference between the two energies.

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The NDCX-II engineering design

Cited by 18 publications

References 20 publications

Absolute calibration of GafChromic film for very high flux laser driven ion beams

Absolute calibration of GafChromic film for very high flux laser driven ion beams

Towards highest peak intensities for ultra-short MeV-range ion bunches

Design and implementation of a Thomson parabola for fluence dependent energy-loss measurements at the Neutralized Drift Compression eXperiment

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