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Title: Upgrading the LAMPF 201 MHz RF generators

Abstract

Radio-frequency generators, operating at 201 MHz, power the first four stages of the Los Alamos Meson Physics Facility (LAMPF) accelerator. Each generator consists of four stages of series-connected, vacuum-tube amplifiers. The first amplifier is a grid-modulated tetrode that produces 500 W peak-power. The second amplifier is a drivemodulated tetrode that produces 5 kW peak-power. The third stage is a grid- and plate-modulated tetrode that produces 130 kW peak-power. The last stage is a plate-modulated triode that produces 2.5 MW peak power. A modernization program has been initiated to improve the reliability of each of these stages. The first two stages of each generator are being replaced with a single, drive-modulated, solid-state amplifier. Specifications for the amplifier design, and requirements for integration into the system are presented. The third stage will be converted to a drive-modulated system using the current tetrode. This modification involves the development of a 17-kV, 15-A switching supply to replace the present plate-modulator. Design requirements for this switching supply are presented. The final stage will remain plate-modulated but will contain a new driver unit for the modulator tube.

Authors:
; ;
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10142750
Report Number(s):
LA-UR-93-823; CONF-930292-1
ON: DE93010715
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: Workshop on accelerators for future spallation neutron sources,Santa Fe, NM (United States),15-21 Feb 1993; Other Information: PBD: [1993]
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; RF SYSTEMS; MODIFICATIONS; LAMPF LINAC; RELIABILITY; POWER AMPLIFIERS; 430303; EXPERIMENTAL FACILITIES AND EQUIPMENT

Citation Formats

Parsons, W M, Lyles, J T.M., and Harris, H W. Upgrading the LAMPF 201 MHz RF generators. United States: N. p., 1993. Web.
Parsons, W M, Lyles, J T.M., & Harris, H W. Upgrading the LAMPF 201 MHz RF generators. United States.
Parsons, W M, Lyles, J T.M., and Harris, H W. Thu . "Upgrading the LAMPF 201 MHz RF generators". United States. https://www.osti.gov/servlets/purl/10142750.
@article{osti_10142750,
title = {Upgrading the LAMPF 201 MHz RF generators},
author = {Parsons, W M and Lyles, J T.M. and Harris, H W},
abstractNote = {Radio-frequency generators, operating at 201 MHz, power the first four stages of the Los Alamos Meson Physics Facility (LAMPF) accelerator. Each generator consists of four stages of series-connected, vacuum-tube amplifiers. The first amplifier is a grid-modulated tetrode that produces 500 W peak-power. The second amplifier is a drivemodulated tetrode that produces 5 kW peak-power. The third stage is a grid- and plate-modulated tetrode that produces 130 kW peak-power. The last stage is a plate-modulated triode that produces 2.5 MW peak power. A modernization program has been initiated to improve the reliability of each of these stages. The first two stages of each generator are being replaced with a single, drive-modulated, solid-state amplifier. Specifications for the amplifier design, and requirements for integration into the system are presented. The third stage will be converted to a drive-modulated system using the current tetrode. This modification involves the development of a 17-kV, 15-A switching supply to replace the present plate-modulator. Design requirements for this switching supply are presented. The final stage will remain plate-modulated but will contain a new driver unit for the modulator tube.},
doi = {},
url = {https://www.osti.gov/biblio/10142750}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {4}
}

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