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Title: Pulsed klystrons with feedback controlled mod-anode modulators

Abstract

This paper describes a fast rise and fall, totem-pole mod-anode modulators for klystron application. Details of these systems as recently installed utilizing a beam switch tube ''on-deck'' and a planar triode ''off-deck'' in a grid-catch feedback regulated configuration will be provided. The grid-catch configuration regulates the klystron mod-anode voltage at a specified set-point during switching as well as providing a control mechanism that flat-top regulates the klystron beam current during the pulse. This flat-topped klystron beam current is maintained while the capacitor bank droops. In addition, we will review more modern on-deck designs using a high gain, high voltage planar triode as a regulating and switching element. These designs are being developed, tested, and implemented for the Los Alamos Neutron Science Center (LANSCE) accelerator refurbishment project, ''LANSCE-R''. An advantage of the planar triode is that the tube can be directly operated with solid state linear components and provides for a very compact design. The tubes are inexpensive compared to stacked semiconductor switching assemblies and also provide a linear control capability. Details of these designs are provided as well as operational and developmental results.

Authors:
 [1];  [1];  [1];  [1]
  1. Los Alamos National Laboratory
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
992205
Report Number(s):
LA-UR-09-05310; LA-UR-09-5310
TRN: US1007700
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Conference
Resource Relation:
Conference: European Pulsed Power Conference 2009 ; September 21, 2009 ; Geneva, Switzerland
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; BEAM CURRENTS; CAPACITORS; CONFIGURATION; DESIGN; FEEDBACK; KLYSTRONS; NEUTRONS

Citation Formats

Reass, William A, Baca, David M, Jerry, Davis L, and Rees, Daniel E. Pulsed klystrons with feedback controlled mod-anode modulators. United States: N. p., 2009. Web.
Reass, William A, Baca, David M, Jerry, Davis L, & Rees, Daniel E. Pulsed klystrons with feedback controlled mod-anode modulators. United States.
Reass, William A, Baca, David M, Jerry, Davis L, and Rees, Daniel E. Thu . "Pulsed klystrons with feedback controlled mod-anode modulators". United States. https://www.osti.gov/servlets/purl/992205.
@article{osti_992205,
title = {Pulsed klystrons with feedback controlled mod-anode modulators},
author = {Reass, William A and Baca, David M and Jerry, Davis L and Rees, Daniel E},
abstractNote = {This paper describes a fast rise and fall, totem-pole mod-anode modulators for klystron application. Details of these systems as recently installed utilizing a beam switch tube ''on-deck'' and a planar triode ''off-deck'' in a grid-catch feedback regulated configuration will be provided. The grid-catch configuration regulates the klystron mod-anode voltage at a specified set-point during switching as well as providing a control mechanism that flat-top regulates the klystron beam current during the pulse. This flat-topped klystron beam current is maintained while the capacitor bank droops. In addition, we will review more modern on-deck designs using a high gain, high voltage planar triode as a regulating and switching element. These designs are being developed, tested, and implemented for the Los Alamos Neutron Science Center (LANSCE) accelerator refurbishment project, ''LANSCE-R''. An advantage of the planar triode is that the tube can be directly operated with solid state linear components and provides for a very compact design. The tubes are inexpensive compared to stacked semiconductor switching assemblies and also provide a linear control capability. Details of these designs are provided as well as operational and developmental results.},
doi = {},
url = {https://www.osti.gov/biblio/992205}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2009},
month = {1}
}

Conference:
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