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Title: Coupled-cavity drift-tube linac

A coupled-cavity drift-tube linac (CCDTL) combines features of the Alvarez drift-tube linac (DTL) and the .pi.-mode coupled-cavity linac (CCL). In one embodiment, each accelerating cavity is a two-cell, 0-mode DTL. The center-to-center distance between accelerating gaps is .beta..lambda., where .lambda. is the free-space wavelength of the resonant mode. Adjacent accelerating cavities have oppositely directed electric fields, alternating in phase by 180 degrees. The chain of cavities operates in a .pi./2 structure mode so the coupling cavities are nominally unexcited. The CCDTL configuration provides an rf structure with high shunt impedance for intermediate velocity charged particles, i.e., particles with energies in the 20-200 MeV range.
Inventors:
 [1]
  1. (Los Alamos, NM)
Issue Date:
OSTI Identifier:
870705
Assignee:
Regents of Univ. of California (Alameda, CA) LANL
Patent Number(s):
US 5578909
Contract Number:
W-7405-ENG-36
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM
Country of Publication:
United States
Language:
English
Subject:
coupled-cavity; drift-tube; linac; ccdtl; combines; features; alvarez; dtl; -mode; ccl; embodiment; accelerating; cavity; two-cell; 0-mode; center-to-center; distance; gaps; beta; lambda; free-space; wavelength; resonant; mode; adjacent; cavities; oppositely; directed; electric; fields; alternating; phase; 180; degrees; chain; operates; structure; coupling; nominally; unexcited; configuration; provides; rf; shunt; impedance; intermediate; velocity; charged; particles; energies; 20-200; mev; range; oppositely directed; configuration provides; charged particles; electric field; charged particle; electric fields; accelerating cavities; accelerating cavity; accelerating gaps; accelerating gap; resonant mode; mev range; drift-tube linac; coupled-cavity drift-tube; /315/

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