NAPAC2016 - Table of Session: THB3 (Oral Presentations (MC8))

Paper

Title

Page

Development of a High Brightness Source for Fast Neutron Imaging*

1260

B. Rusnak, S.G. Anderson, D.L. Bleuel, M.L. Crank, P. Fitsos, D.J. Gibson, M. Hall, M.S. Johnson, R.A. Marsh, J.D. Sain, R. Souza, A. Wiedrick
LLNL, Livermore, California, USA

Funding: *This work performed under the auspices of the U. S. Department of Energy by Lawrence Livermore National Laboratory under contract DE-AC52-07NA27344.
Lawrence Livermore National Lab is developing an intense, high-brightness fast neutron source to create high resolution neutron radiographs and images. An intense source (10¹¹ n/s/sr at 0 degrees) of fast neutrons (10 MeV) allows: penetrating very thick, dense objects; maintaining high scintillator response efficiency; and remaining below the air activation threshold for (n,p) reactions. Fast neutrons will be produced using a pulsed 7 MeV, 300 microamp average-current commercial ion accelerator that will deliver deuterons to a 3 atmosphere deuterium gas cell. To achieve high resolution, a small (1.5 mm diameter) beam spot size will be used, and to reduce scattering from lower energy neutrons, a transmission gas cell will be used to produce a quasi-monoenergetic neutron beam. Because of the high power density of such a tightly focused, modest-energy ion beam, the gas target is a major engineering challenge that combines a 'windowless' rotating aperture, a rotary valve to meter cross-flowing high pressure gases, a novel gas beam stop, and recirculating gas compressor systems. A summary of the progress of the system design and building effort shall be presented.

Slides THB3IO01 [6.998 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-THB3IO01

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THB3IO02

Review of Potential Accelerator Systems for Energy and Environmental Applications

S. Henderson
ANL, Argonne, Illinois, USA

Review potential accelerator concepts for Energy and Environmental applications. The talk should cover several potential applications and address the technological requirements and the issues that must be addressed to reach successful market insertion.

Slides THB3IO02 [6.250 MB]

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THB3CO03

Thermoacoustic Range Verification for Ion Therapy

1265

S.K. Patch, Y.M. Qadadha
UWM, Milwaukee, Wisconsin, USA
R. Albright, P. Bloemhard, K. Campbell, A.P. Donoghue, T.L. Gimpel, A. Jackson, M.B. Johnson, M. Kireeff Covo, B. Ninemire, L. Phair, C.R. Siero, S.M. Small
LBNL, Berkeley, California, USA

Funding: We acknowledge support from a UWM Intramural Instrumentation Grant and by the Director, Office of Science, Office of Nuclear Physics, of the U.S. Dept. of Energy under Contract No. DE-AC02-05CH11231.
The potential of particle therapy due to focused dose deposition in the Bragg peak has not yet been fully realized due to inaccuracies in range verification. We report correlation of the Bragg peak location with target structure, by overlaying thermoacoustic localization of the Bragg peak onto a standard ultrasound image. Pulsed delivery of 50 MeV protons was accomplished by a fast chopper installed between the ion source and the inflector of the 88" cyclotron at Lawrence Berkeley National Lab. 2 Gy were delivered in 2 μs by a beam with peak current of 2 μA. Thermoacoustic emissions were detected by a clinical ultrasound array, which also generated a grayscale ultrasound image. Data was collected in a room temperature water bath and gelatin phantom with a cavity designed to mimic the intestine, where gas pockets can displace the Bragg peak. Experiments were performed with the cavity both empty and filled with olive oil. In the waterbath overlays of the Bragg peak agreed with Monte Carlo simulations to within 800±170 μm. Agreement within 1.3 ± 0.2 mm was achieved in the gelatin phantom, for which stopping power was estimated to first order from CT scans.

Slides THB3CO03 [1.156 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-THB3CO03

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THB3CO04

Technology Development Toward High Duty Cycle Inverse Compton Scattering X-Ray Source

WEPOB46

use link to see paper's listing under its alternate paper code

A.Y. Murokh, R.B. Agustsson, T.J. Campese, A.G. Ovodenko
RadiaBeam, Santa Monica, California, USA
M. Babzien, M.G. Fedurin, I. Pogorelsky, M.N. Polyanskiy, T.V. Shaftan, C. Swinson
BNL, Upton, Long Island, New York, USA
J.B. Rosenzweig, Y. Sakai
UCLA, Los Angeles, California, USA

An important challenge in the development of practical X-ray sources based on Inverse Compton Scattering is the implementation of a reliable, increased-repetition-rate operation cycle. To this end, we report the first demonstration of an actively re-amplified CO2 laser intra-cavity ICS source, which matches the electron linac pulse structure at 40 MHz repetition rate. Multi-bunch interaction with 5- and 15-pulse trains was demonstrated, and near linear photon yield gain from multi-pulse interaction was demonstrated. The system shows noticeably higher operational reliability than several contemporary single shot systems, as well as a great potential for future scalability.

Slides THB3CO04 [2.320 MB]

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Paper	Title	Page
THB3IO01	Development of a High Brightness Source for Fast Neutron Imaging*	1260
	B. Rusnak, S.G. Anderson, D.L. Bleuel, M.L. Crank, P. Fitsos, D.J. Gibson, M. Hall, M.S. Johnson, R.A. Marsh, J.D. Sain, R. Souza, A. Wiedrick LLNL, Livermore, California, USA
	Funding: *This work performed under the auspices of the U. S. Department of Energy by Lawrence Livermore National Laboratory under contract DE-AC52-07NA27344. Lawrence Livermore National Lab is developing an intense, high-brightness fast neutron source to create high resolution neutron radiographs and images. An intense source (10¹¹ n/s/sr at 0 degrees) of fast neutrons (10 MeV) allows: penetrating very thick, dense objects; maintaining high scintillator response efficiency; and remaining below the air activation threshold for (n,p) reactions. Fast neutrons will be produced using a pulsed 7 MeV, 300 microamp average-current commercial ion accelerator that will deliver deuterons to a 3 atmosphere deuterium gas cell. To achieve high resolution, a small (1.5 mm diameter) beam spot size will be used, and to reduce scattering from lower energy neutrons, a transmission gas cell will be used to produce a quasi-monoenergetic neutron beam. Because of the high power density of such a tightly focused, modest-energy ion beam, the gas target is a major engineering challenge that combines a 'windowless' rotating aperture, a rotary valve to meter cross-flowing high pressure gases, a novel gas beam stop, and recirculating gas compressor systems. A summary of the progress of the system design and building effort shall be presented.
	Slides THB3IO01 [6.998 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-THB3IO01
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THB3IO02	Review of Potential Accelerator Systems for Energy and Environmental Applications
	S. Henderson ANL, Argonne, Illinois, USA
	Review potential accelerator concepts for Energy and Environmental applications. The talk should cover several potential applications and address the technological requirements and the issues that must be addressed to reach successful market insertion.
	Slides THB3IO02 [6.250 MB]
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THB3CO03	Thermoacoustic Range Verification for Ion Therapy	1265
	S.K. Patch, Y.M. Qadadha UWM, Milwaukee, Wisconsin, USA R. Albright, P. Bloemhard, K. Campbell, A.P. Donoghue, T.L. Gimpel, A. Jackson, M.B. Johnson, M. Kireeff Covo, B. Ninemire, L. Phair, C.R. Siero, S.M. Small LBNL, Berkeley, California, USA
	Funding: We acknowledge support from a UWM Intramural Instrumentation Grant and by the Director, Office of Science, Office of Nuclear Physics, of the U.S. Dept. of Energy under Contract No. DE-AC02-05CH11231. The potential of particle therapy due to focused dose deposition in the Bragg peak has not yet been fully realized due to inaccuracies in range verification. We report correlation of the Bragg peak location with target structure, by overlaying thermoacoustic localization of the Bragg peak onto a standard ultrasound image. Pulsed delivery of 50 MeV protons was accomplished by a fast chopper installed between the ion source and the inflector of the 88" cyclotron at Lawrence Berkeley National Lab. 2 Gy were delivered in 2 μs by a beam with peak current of 2 μA. Thermoacoustic emissions were detected by a clinical ultrasound array, which also generated a grayscale ultrasound image. Data was collected in a room temperature water bath and gelatin phantom with a cavity designed to mimic the intestine, where gas pockets can displace the Bragg peak. Experiments were performed with the cavity both empty and filled with olive oil. In the waterbath overlays of the Bragg peak agreed with Monte Carlo simulations to within 800±170 μm. Agreement within 1.3 ± 0.2 mm was achieved in the gelatin phantom, for which stopping power was estimated to first order from CT scans.
	Slides THB3CO03 [1.156 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-THB3CO03
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THB3CO04	Technology Development Toward High Duty Cycle Inverse Compton Scattering X-Ray Source
WEPOB46	use link to see paper's listing under its alternate paper code
	A.Y. Murokh, R.B. Agustsson, T.J. Campese, A.G. Ovodenko RadiaBeam, Santa Monica, California, USA M. Babzien, M.G. Fedurin, I. Pogorelsky, M.N. Polyanskiy, T.V. Shaftan, C. Swinson BNL, Upton, Long Island, New York, USA J.B. Rosenzweig, Y. Sakai UCLA, Los Angeles, California, USA
	An important challenge in the development of practical X-ray sources based on Inverse Compton Scattering is the implementation of a reliable, increased-repetition-rate operation cycle. To this end, we report the first demonstration of an actively re-amplified CO2 laser intra-cavity ICS source, which matches the electron linac pulse structure at 40 MHz repetition rate. Multi-bunch interaction with 5- and 15-pulse trains was demonstrated, and near linear photon yield gain from multi-pulse interaction was demonstrated. The system shows noticeably higher operational reliability than several contemporary single shot systems, as well as a great potential for future scalability.
	Slides THB3CO04 [2.320 MB]
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)