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Title: 50 KW Multi-beam Klystron

Abstract

Statement of problem or situation that is being addressed: microwave power sources (such as klystrons) offering an increased efficiency (80% or above) are needed for various applications. Of a particular interest is a source at 952.6 MHz delivering 50kW (continuous) CW for the RF systems for ion acceleration in the Energy Electron Ion Collider EIC being developed at Thomas Jefferson National Accelerator Facility. General statement of how this problem is being addressed: A novel tube (klystron) concept with efficiency in excess of 80%, delivering 50 kW CW at 952.6 MHz MHz is proposed. It is a combination of proven technologies put together: its uses multiple beams to have its perveance low to boost beam-power to RF efficiency. It uses a partially grounded depressed collector (as invented by Omega P R&D) with a carefully tailored beam distribution after the cavity chain to recover energy thereby increasing the overall efficiency even more. A low operating voltage makes the tube more user-friendly avoiding need for costly modulators and oil insulation. A sectioned solenoid is used to insure superb beam-matching to all components downstream of the electron gun, increasing the tube performances. What is to be done in Phase I: The overall goal ofmore » this project is to develop, design, engineer, manufacture and test a multi-beam klystron operating in CW regime, delivering 50kW CW of power at 952.6 MHz. The effort is to be coordinated with TJNAF to insure excellent compatibility with the facility. The device will have a high efficiency >80% (operating at 12kV). The main goals during Phase I are to numerically simulate and optimize the klystron main components, namely the gun, the RF cavity chain, the multi-channel-channel partially grounded depressed collector, and the magnetic system. Preliminary engineering issues will be coordinated by Omega-P R&D with its strategic alliance partner Calabazas Creek Research Inc., which expected to participate formally during Phase II in final design and fabrication. Commercial Applications and Other Benefits: The klystrons of this type can serve as the main RF-energy source of in RF-systems for accelerators which have found their applications both in science and industry, and is of high interest to Thomas Jefferson National Accelerator Facility.« less

Authors:
; ;
Publication Date:
Research Org.:
Omega-P R&D, Inc.
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1502117
Report Number(s):
DE-SC0018471
DOE Contract Number:  
SC0018471
Type / Phase:
SBIR (Phase I)
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
RF power sources, klystron, high efficiency, CW, energy recovery, depressed partially-grounded collector.

Citation Formats

Shchelkunov, Sergey V., Hirshfield, Jay L., and Jiang, Yong. 50 KW Multi-beam Klystron. United States: N. p., 2019. Web. doi:10.2172/1502117.
Shchelkunov, Sergey V., Hirshfield, Jay L., & Jiang, Yong. 50 KW Multi-beam Klystron. United States. doi:10.2172/1502117.
Shchelkunov, Sergey V., Hirshfield, Jay L., and Jiang, Yong. Tue . "50 KW Multi-beam Klystron". United States. doi:10.2172/1502117. https://www.osti.gov/servlets/purl/1502117.
@article{osti_1502117,
title = {50 KW Multi-beam Klystron},
author = {Shchelkunov, Sergey V. and Hirshfield, Jay L. and Jiang, Yong},
abstractNote = {Statement of problem or situation that is being addressed: microwave power sources (such as klystrons) offering an increased efficiency (80% or above) are needed for various applications. Of a particular interest is a source at 952.6 MHz delivering 50kW (continuous) CW for the RF systems for ion acceleration in the Energy Electron Ion Collider EIC being developed at Thomas Jefferson National Accelerator Facility. General statement of how this problem is being addressed: A novel tube (klystron) concept with efficiency in excess of 80%, delivering 50 kW CW at 952.6 MHz MHz is proposed. It is a combination of proven technologies put together: its uses multiple beams to have its perveance low to boost beam-power to RF efficiency. It uses a partially grounded depressed collector (as invented by Omega P R&D) with a carefully tailored beam distribution after the cavity chain to recover energy thereby increasing the overall efficiency even more. A low operating voltage makes the tube more user-friendly avoiding need for costly modulators and oil insulation. A sectioned solenoid is used to insure superb beam-matching to all components downstream of the electron gun, increasing the tube performances. What is to be done in Phase I: The overall goal of this project is to develop, design, engineer, manufacture and test a multi-beam klystron operating in CW regime, delivering 50kW CW of power at 952.6 MHz. The effort is to be coordinated with TJNAF to insure excellent compatibility with the facility. The device will have a high efficiency >80% (operating at 12kV). The main goals during Phase I are to numerically simulate and optimize the klystron main components, namely the gun, the RF cavity chain, the multi-channel-channel partially grounded depressed collector, and the magnetic system. Preliminary engineering issues will be coordinated by Omega-P R&D with its strategic alliance partner Calabazas Creek Research Inc., which expected to participate formally during Phase II in final design and fabrication. Commercial Applications and Other Benefits: The klystrons of this type can serve as the main RF-energy source of in RF-systems for accelerators which have found their applications both in science and industry, and is of high interest to Thomas Jefferson National Accelerator Facility.},
doi = {10.2172/1502117},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {1}
}