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Title: High-gradient compact linear accelerator

Abstract

A high-gradient linear accelerator comprises a solid-state stack in a vacuum of five sets of disc-shaped Blumlein modules each having a center hole through which particles are sequentially accelerated. Each Blumlein module is a sandwich of two outer conductive plates that bracket an inner conductive plate positioned between two dielectric plates with different thicknesses and dielectric constants. A third dielectric core in the shape of a hollow cylinder forms a casing down the series of center holes, and it has a dielectric constant different that the two dielectric plates that sandwich the inner conductive plate. In operation, all the inner conductive plates are charged to the same DC potential relative to the outer conductive plates. Next, all the inner conductive plates are simultaneously shorted to the outer conductive plates at the outer diameters. The signal short will propagate to the inner diameters at two different rates in each Blumlein module. A faster wave propagates quicker to the third dielectric core across the dielectric plates with the closer spacing and lower dielectric constant. When the faster wave reaches the inner extents of the outer and inner conductive plates, it reflects back outward and reverses the field in that segment of themore » dielectric core. All the field segments in the dielectric core are then in unipolar agreement until the slower wave finally propagates to the third dielectric core across the dielectric plates with the wider spacing and higher dielectric constant. During such unipolar agreement, particles in the core are accelerated with gradients that exceed twenty megavolts per meter.« less

Inventors:
 [1]
  1. (205 Rogue River Hwy., Gold Hill, OR 97525)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
871578
Patent Number(s):
US 5757146
Assignee:
Carder, Bruce M. (205 Rogue River Hwy., Gold Hill, OR 97525) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
high-gradient; compact; linear; accelerator; comprises; solid-state; stack; vacuum; five; sets; disc-shaped; blumlein; modules; center; particles; sequentially; accelerated; module; sandwich; outer; conductive; plates; bracket; inner; plate; positioned; dielectric; thicknesses; constants; third; core; shape; hollow; cylinder; forms; casing; series; holes; constant; operation; charged; dc; potential; relative; simultaneously; shorted; diameters; signal; propagate; rates; faster; wave; propagates; quicker; closer; spacing; reaches; extents; reflects; outward; reverses; field; segment; segments; unipolar; agreement; slower; finally; wider; gradients; exceed; twenty; megavolts; meter; outer conductive; inner conductive; hollow cylinder; dielectric constants; inner diameter; dielectric constant; linear accelerator; outer diameter; conductive plates; blumlein modules; potential relative; plate positioned; conductive plate; blumlein module; /315/

Citation Formats

Carder, Bruce M. High-gradient compact linear accelerator. United States: N. p., 1998. Web.
Carder, Bruce M. High-gradient compact linear accelerator. United States.
Carder, Bruce M. Thu . "High-gradient compact linear accelerator". United States. doi:. https://www.osti.gov/servlets/purl/871578.
@article{osti_871578,
title = {High-gradient compact linear accelerator},
author = {Carder, Bruce M.},
abstractNote = {A high-gradient linear accelerator comprises a solid-state stack in a vacuum of five sets of disc-shaped Blumlein modules each having a center hole through which particles are sequentially accelerated. Each Blumlein module is a sandwich of two outer conductive plates that bracket an inner conductive plate positioned between two dielectric plates with different thicknesses and dielectric constants. A third dielectric core in the shape of a hollow cylinder forms a casing down the series of center holes, and it has a dielectric constant different that the two dielectric plates that sandwich the inner conductive plate. In operation, all the inner conductive plates are charged to the same DC potential relative to the outer conductive plates. Next, all the inner conductive plates are simultaneously shorted to the outer conductive plates at the outer diameters. The signal short will propagate to the inner diameters at two different rates in each Blumlein module. A faster wave propagates quicker to the third dielectric core across the dielectric plates with the closer spacing and lower dielectric constant. When the faster wave reaches the inner extents of the outer and inner conductive plates, it reflects back outward and reverses the field in that segment of the dielectric core. All the field segments in the dielectric core are then in unipolar agreement until the slower wave finally propagates to the third dielectric core across the dielectric plates with the wider spacing and higher dielectric constant. During such unipolar agreement, particles in the core are accelerated with gradients that exceed twenty megavolts per meter.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 1998},
month = {Thu Jan 01 00:00:00 EST 1998}
}

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