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CERN Accelerating science

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1.
Electromagnetic Simulations of Helical-Based Ion Acceleration Structures / Nelson, Scott D ; Briggs, Richard J ; Caporaso, George ; Friedman, Alex ; Poole, Brian R ; Waldron, William
Helix structures have been proposed* for accelerating low energy ion beams using MV/m fields in order to increase the coupling effeciency of the pulsed power system and to tailor the electromagnetic wave propagation speed with the particle beam speed as the beam gains energy. Calculations presented here show the electromagnetic field as it propagates along the helix structure, field stresses around the helix structure (for voltage breakdown determination), optimizations to the helix and driving pulsed power waveform, and simulations showing test particles interacting with the simulated time varying fields..
2005 External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.2485
2.
Dispersion Analysis of the Pulseline Accelerator / Caporaso, George ; Briggs, Richard J ; Nelson, Scott D ; Poole, Brian R
We analyze the sheath helix model of the pulseline accelerator.* We find the dispersion relation for a shielded helix with a dielectric material between the shield and the helix and compare it against the results from 3-D electromagnetic simulations. Expressions for the fields near the beam axis are obtained. [...]
2005 External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.2330
3.
Helical Pulseline Structures for Ion Acceleration / Briggs, R J ; Reginato, Lou ; Waldron, William
The basic concept of the "Pulseline Ion Accelerator" involves launching a ramped high voltage pulse on a broad band traveling wave (slow-wave) structure. An applied voltage pulse at the input end with a segment rising linearly in time becomes a linear voltage ramp in space that propagates down the line, corresponding to a (moving) region of constant axial accelerating electric field [...]
2005 External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.440
4.
RF Impedance Measurements on the DARHT-II Accelerator Intercell Assembly / Briggs, Richard J ; Reginato, Lou ; Waldron, William
2003 - 3 p. External link: Published version from JACoW
In : 20th IEEE Particle Accelerator Conference, Portland, OR, USA, 12 - 16 May 2003, pp.3098
5.
Beam Dynamics in the ETA and ATA 10 kA Linear Induction Accelerators-Observations and Issues / Briggs, R J ; Birx, D L ; Caporaso, G J ; Fessenden, T J ; Hester, R E ; Melendez, R ; Neil, V K ; Paul, A C ; Struve, K W
1981 External link: Published version from JACoW
In : 9th Particle Accelerator Conference, Washington, DC, USA, 11 - 13 Mar 1981, pp.3360
6.
Highly Compressed Ion Beams for High Energy Density Science / Friedman, Alex ; Barnard, John J ; Briggs, Richard J ; Callahan, Debra ; Caporaso, George ; Celata, C M ; Davidson, Ronald C ; Faltens, Andy ; Grant-Logan, B ; Grisham, Larry et al.
The Heavy Ion Fusion Virtual National Laboratory (HIF-VNL) is developing the intense ion beams needed to drive matter to the High Energy Density (HED) regimes required for Inertial Fusion Energy (IFE) and other applications. An interim goal is a facility for Warm Dense Matter (WDM) studies, wherein a target is heated volumetrically without being shocked, so that well-defined states of matter at 1 to 10 eV are generated within a diagnosable region. [...]
2005 External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.339
7.
Status of the DARHT Phase 2 Long-Pulse Accelerator / Burns, M J ; Carlsten, B E ; Davis, H A ; Ekdahl, C A ; Fortgang, C M ; McCuistian, B T ; Merrill, F E ; Nielsen, K E ; Wilkinson, C A ; Chow, K P et al.
2001 IEEE Published version, local copy: PDF;
In : 19th IEEE Particle Accelerator Conference, Chicago, IL, USA, 18 - 22 Jun 2001, pp.e-proc. 325
8.
Theoretical And Experimental Investigation Of The Interaction impedances and Q Values Of The Accelerating Cells In The Advanced Test accelerator / Briggs, R J ; Birx, D L ; Caporaso, G J ; Neil, V K (LLNL, Livermore) ; Genoni, T C
1986 - Published in : Part. Accel.: 18 (1986) , pp. 41-62 Fulltext: PDF;
9.
High Voltage Operation of Helical Pulseline Structures for Ion Acceleration / Waldron, William ; Briggs, Richard J ; Reginato, Lou
The basic concept for the acceleration of heavy ions using a helical pulseline requires the launching of a high voltage traveling wave with a waveform determined by the beam transport physics in order to maintain stability and acceleration.* This waveform is applied to the front of the helix, creating over the region of the ion bunch a constant axial acceleration electric field that travels down the line in synchronism with the ions. Several methods of driving the helix have been considered. [...]
2005 External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.2092
10.
A Long Pulse Linac for the Second Phase of DARHT / Burgess, E L ; Comins, J D ; Fawley, W M ; Munson, D V ; Nyman, M A ; Jackson, L T ; Peters, C ; Reginato, L ; Rutkowski, H L ; Vella, M C et al.
1999 IEEE Published version, local copy: PDF;
In : 18th Biennial Particle Accelerator Conference, New York, NY, USA, 29 Mar - 2 Apr 1999, pp.e-proc. 3257

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