PAC2013 - List of Authors (Boucher, S.)

Paper

Title

Page

Continued Development and Testing of Carbon Nanotube Cathodes at Radiabeam

394

J.J. Hartzell, R.B. Agustsson, S. Boucher, L. Faillace, A.Y. Murokh, A.V. Smirnov
RadiaBeam, Santa Monica, USA
W.A. Hubbard, C. Regan
UCLA, Los Angeles, USA

Funding: US Department of Energy
RadiaBeam Technologies is developing carbon nanotube (CNT) based field emission cathodes for DC-pulsed and radio-frequency electron sources. CNT cathodes offer simple operation, have demonstrated high current densities, and can maintain low thermal emittance due to their ability to emit at room temperature. The experimental results of high-voltage and lifetime testing of CNT cathodes are presented. There is also a brief summary of a planned experiment in a dual-frequency RF gun. Additionally, some of the challenges posed by the fabrication and handling of the CNT cathodes are discussed.

Slides TUOAB2 [10.433 MB]

TUPSM28

Innovative Low-Energy Ultra-Fast Electron Diffraction (UED) System

697

E.W. Threlkeld, P. Musumeci
UCLA, Los Angeles, USA
S. Boucher, L. Faillace, A.V. Smirnov
RadiaBeam, Santa Monica, USA

Funding: Work supported by US DOE grant # DE-SC0006274
RadiaBeam, in collaboration with UCLA, is developing an innovative, inexpensive, low-energy ultra-fast electron diffraction (UED) system which allows us to reconstruct a single ultrafast event with a single pulse of electrons. Time resolved measurement of atomic motion is one of the frontiers of modern science, and advancements in this area will greatly improve our understanding of the basic processes in materials science, chemistry and biology. The high-frequency (GHz), high voltage, phase-locked RF field in the deflector allows temporal resolution as fine as sub-100 fs. In this paper, we show the complete design of the UED system based on this concept, including initial beam measurements.

WEOCB1

Diagnostic Proton Computed Tomography Using Laser-Driven Ion Acceleration

770

K.E. Woods, S. Boucher
RadiaBeam, Santa Monica, USA
V.A. Bashkirov, R.W. Schulte
LLU/MC, Loma Linda, California, USA
B.M. Hegelich
The University of Texas at Austin, Austin, Texas, USA

Although the growing utilization of computed tomography (CT)-based imaging has led to major advances in diagnostic capabilities, it has also resulted in higher cumulative radiation doses to patients. In order to fully exploit the benefits of high-resolution diagnostic CT scans while minimizing the risks of radiation-induced cancer, the realization of low-dose CT is crucial. Recent research has shown that the use of protons, rather than X-rays, for CT has the potential to greatly reduce the radiation dose delivered to the patient without reducing image quality. RadiaBeam Technologies, in collaboration with the Loma Linda University Medical Center and the University of Texas at Austin, is proposing the development of a proton CT scanner utilizing laser-driven ion acceleration (LDIA) techniques. The initial design of this system is presented.

Slides WEOCB1 [1.999 MB]

WEPBA18

Performance of Planar Radiator in the Radiabeam-IAC Experiment

925

A.V. Smirnov, R.B. Agustsson, S. Boucher, J.J. Hartzell, S. Storms
RadiaBeam, Santa Monica, USA
Y. Kim
IAC, Pocatello, IDAHO, USA

Funding: Work supported by the U.S. Department of Energy (award No. DE- SC-FOA-0000760 and in part DE-FG02-07ER84877)
Planar gratings structure for generation of mm-sub-mm wavelength long-range wakefields is analyzed. The rugged, side-open, slow wave structure can sustain substantial beam loading including long multi-bunch trains up to CW operation. Electromagnetic performance of the structure is characterized numerically vs. experiment with emphasis to application to flat beams. It is shown that such an electrically wide, wavelength-gap structure can operate at significantly reduced tolerances whereas substantial flatness of the wakefield can be obtained at essentially non-flat eigenmode profile.

THOAA2

Compact, Inexpensive X-band Linacs as Radioactive Isotope Source Replacements

S. Boucher, R.B. Agustsson, L. Faillace, J.J. Hartzell, A.Y. Murokh, S. Seung, A.V. Smirnov, S. Storms, K.E. Woods
RadiaBeam, Santa Monica, USA

Funding: Work supported by DNDO Phase II SBIR HSHQDC-10-C-00148 and DOE Phase II SBIR DE-SC0000865.
Radioisotope sources are commonly used in a variety of industrial and medical applications. The US National Research Council has identified as a priority the replacement of high-activity sources with alternative technologies, due to the risk of accidents and diversion by terrorists for use in Radiological Dispersal Devices (“dirty bombs”). RadiaBeam Technologies is developing novel, compact, inexpensive linear accelerators for use in a variety of such applications as cost-effective replacements. The technology is based on the MicroLinac (originally developed at SLAC), an X-band linear accelerator powered by an inexpensive and commonly available magnetron. Prototypes are currently under construction. This paper will describe the design, engineering, fabrication and testing of these linacs at RadiaBeam. Future development plans will also be discussed.

Slides THOAA2 [6.067 MB]

Paper	Title	Page
TUOAB2	Continued Development and Testing of Carbon Nanotube Cathodes at Radiabeam	394
	J.J. Hartzell, R.B. Agustsson, S. Boucher, L. Faillace, A.Y. Murokh, A.V. Smirnov RadiaBeam, Santa Monica, USA W.A. Hubbard, C. Regan UCLA, Los Angeles, USA
	Funding: US Department of Energy RadiaBeam Technologies is developing carbon nanotube (CNT) based field emission cathodes for DC-pulsed and radio-frequency electron sources. CNT cathodes offer simple operation, have demonstrated high current densities, and can maintain low thermal emittance due to their ability to emit at room temperature. The experimental results of high-voltage and lifetime testing of CNT cathodes are presented. There is also a brief summary of a planned experiment in a dual-frequency RF gun. Additionally, some of the challenges posed by the fabrication and handling of the CNT cathodes are discussed.
	Slides TUOAB2 [10.433 MB]

TUPSM28	Innovative Low-Energy Ultra-Fast Electron Diffraction (UED) System	697
	E.W. Threlkeld, P. Musumeci UCLA, Los Angeles, USA S. Boucher, L. Faillace, A.V. Smirnov RadiaBeam, Santa Monica, USA
	Funding: Work supported by US DOE grant # DE-SC0006274 RadiaBeam, in collaboration with UCLA, is developing an innovative, inexpensive, low-energy ultra-fast electron diffraction (UED) system which allows us to reconstruct a single ultrafast event with a single pulse of electrons. Time resolved measurement of atomic motion is one of the frontiers of modern science, and advancements in this area will greatly improve our understanding of the basic processes in materials science, chemistry and biology. The high-frequency (GHz), high voltage, phase-locked RF field in the deflector allows temporal resolution as fine as sub-100 fs. In this paper, we show the complete design of the UED system based on this concept, including initial beam measurements.

WEOCB1	Diagnostic Proton Computed Tomography Using Laser-Driven Ion Acceleration	770
	K.E. Woods, S. Boucher RadiaBeam, Santa Monica, USA V.A. Bashkirov, R.W. Schulte LLU/MC, Loma Linda, California, USA B.M. Hegelich The University of Texas at Austin, Austin, Texas, USA
	Although the growing utilization of computed tomography (CT)-based imaging has led to major advances in diagnostic capabilities, it has also resulted in higher cumulative radiation doses to patients. In order to fully exploit the benefits of high-resolution diagnostic CT scans while minimizing the risks of radiation-induced cancer, the realization of low-dose CT is crucial. Recent research has shown that the use of protons, rather than X-rays, for CT has the potential to greatly reduce the radiation dose delivered to the patient without reducing image quality. RadiaBeam Technologies, in collaboration with the Loma Linda University Medical Center and the University of Texas at Austin, is proposing the development of a proton CT scanner utilizing laser-driven ion acceleration (LDIA) techniques. The initial design of this system is presented.
	Slides WEOCB1 [1.999 MB]

WEPBA18	Performance of Planar Radiator in the Radiabeam-IAC Experiment	925
	A.V. Smirnov, R.B. Agustsson, S. Boucher, J.J. Hartzell, S. Storms RadiaBeam, Santa Monica, USA Y. Kim IAC, Pocatello, IDAHO, USA
	Funding: Work supported by the U.S. Department of Energy (award No. DE- SC-FOA-0000760 and in part DE-FG02-07ER84877) Planar gratings structure for generation of mm-sub-mm wavelength long-range wakefields is analyzed. The rugged, side-open, slow wave structure can sustain substantial beam loading including long multi-bunch trains up to CW operation. Electromagnetic performance of the structure is characterized numerically vs. experiment with emphasis to application to flat beams. It is shown that such an electrically wide, wavelength-gap structure can operate at significantly reduced tolerances whereas substantial flatness of the wakefield can be obtained at essentially non-flat eigenmode profile.

THOAA2	Compact, Inexpensive X-band Linacs as Radioactive Isotope Source Replacements
	S. Boucher, R.B. Agustsson, L. Faillace, J.J. Hartzell, A.Y. Murokh, S. Seung, A.V. Smirnov, S. Storms, K.E. Woods RadiaBeam, Santa Monica, USA
	Funding: Work supported by DNDO Phase II SBIR HSHQDC-10-C-00148 and DOE Phase II SBIR DE-SC0000865. Radioisotope sources are commonly used in a variety of industrial and medical applications. The US National Research Council has identified as a priority the replacement of high-activity sources with alternative technologies, due to the risk of accidents and diversion by terrorists for use in Radiological Dispersal Devices (“dirty bombs”). RadiaBeam Technologies is developing novel, compact, inexpensive linear accelerators for use in a variety of such applications as cost-effective replacements. The technology is based on the MicroLinac (originally developed at SLAC), an X-band linear accelerator powered by an inexpensive and commonly available magnetron. Prototypes are currently under construction. This paper will describe the design, engineering, fabrication and testing of these linacs at RadiaBeam. Future development plans will also be discussed.
	Slides THOAA2 [6.067 MB]