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 Laboratory (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. 1993.
"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 = {Thu Apr 01 00:00:00 EST 1993},
month = {Thu Apr 01 00:00:00 EST 1993}
}