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Title: Developments and directions in 200 MHz very high power RF at LAMPF

Abstract

The Los Alamos Meson Physics Facility (LAMPF), is a linear particle accelerator a half-mile long. It produces an 800 million electron- volt hydrogen-ion beam at an average current of more than one milliamp. The first RF section of the accelerator consists of four Alvarez drift-tube structures. Each of these structures is excited by an amplifier module at a frequency of 201.25 MHz. These amplifiers operate at a duty of 13 percent or more and at peak pulsed power levels of about 2.5 million watts. The second RF accelerator section consists of forty-four side-coupled-cavity structures. Each of these is excited by an amplifier module at a frequency of 805 MHz. These amplifiers operate at a duty of up to 12 percent and at peak pulsed power levels of about 1.2 million watts. The relatively high average beam current in the accelerator places a heavy demand upon components in the RF systems. The 201-MHz modules have always required a large share of maintenance efforts. In recent years, the four 201.25 MHz modules have been responsible for more than twice as much accelerator down-time as have the forty-four 805 MHz modules. This paper reviews recent, ongoing, and planned improvements in the 201-MHz systems.more » The Burle Industries 7835 super power triode is used in the final power amplifiers of each of the 201-MHz modules. This tube has been modified for operation at LAMPF by the addition of Penning ion vacuum pumps.'' This has enabled more effective tube conditioning and restarting. A calorimetry system of high accuracy is in development to monitor tube plate-power dissipation.« less

Authors:
; ; ; ;
Publication Date:
Research Org.:
Los Alamos National Lab., NM (United States)
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
5333626
Report Number(s):
LA-UR-91-3102; CONF-9110221-1
ON: DE92000175
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: RF Expo 91, Orlando, FL (United States), 29 Oct 1991
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; LAMPF LINAC; RF SYSTEMS; DESIGN; CALORIMETRY; MHZ RANGE 100-1000; MODIFICATIONS; THERMOMETERS; ACCELERATORS; FREQUENCY RANGE; LINEAR ACCELERATORS; MEASURING INSTRUMENTS; MESON FACTORIES; MHZ RANGE; 430303* - Particle Accelerators- Experimental Facilities & Equipment

Citation Formats

Cliff, R, Bush, E D, DeHaven, R A, Harris, H W, and Parsons, M. Developments and directions in 200 MHz very high power RF at LAMPF. United States: N. p., 1991. Web.
Cliff, R, Bush, E D, DeHaven, R A, Harris, H W, & Parsons, M. Developments and directions in 200 MHz very high power RF at LAMPF. United States.
Cliff, R, Bush, E D, DeHaven, R A, Harris, H W, and Parsons, M. 1991. "Developments and directions in 200 MHz very high power RF at LAMPF". United States. https://www.osti.gov/servlets/purl/5333626.
@article{osti_5333626,
title = {Developments and directions in 200 MHz very high power RF at LAMPF},
author = {Cliff, R and Bush, E D and DeHaven, R A and Harris, H W and Parsons, M},
abstractNote = {The Los Alamos Meson Physics Facility (LAMPF), is a linear particle accelerator a half-mile long. It produces an 800 million electron- volt hydrogen-ion beam at an average current of more than one milliamp. The first RF section of the accelerator consists of four Alvarez drift-tube structures. Each of these structures is excited by an amplifier module at a frequency of 201.25 MHz. These amplifiers operate at a duty of 13 percent or more and at peak pulsed power levels of about 2.5 million watts. The second RF accelerator section consists of forty-four side-coupled-cavity structures. Each of these is excited by an amplifier module at a frequency of 805 MHz. These amplifiers operate at a duty of up to 12 percent and at peak pulsed power levels of about 1.2 million watts. The relatively high average beam current in the accelerator places a heavy demand upon components in the RF systems. The 201-MHz modules have always required a large share of maintenance efforts. In recent years, the four 201.25 MHz modules have been responsible for more than twice as much accelerator down-time as have the forty-four 805 MHz modules. This paper reviews recent, ongoing, and planned improvements in the 201-MHz systems. The Burle Industries 7835 super power triode is used in the final power amplifiers of each of the 201-MHz modules. This tube has been modified for operation at LAMPF by the addition of Penning ion vacuum pumps.'' This has enabled more effective tube conditioning and restarting. A calorimetry system of high accuracy is in development to monitor tube plate-power dissipation.},
doi = {},
url = {https://www.osti.gov/biblio/5333626}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 1991},
month = {Tue Jan 01 00:00:00 EST 1991}
}

Conference:
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