RF Electronics Engineer
Location: California City
Posted on: September 18, 2022
Lawrence Berkeley National Lab's (LBNL) Engineering Division has
an opening for an RF Electronics Engineer to join the RF
In this role, you will support the Advanced Light Source (ALS)
accelerator complex, in a variety of engineering tasks to include
developmental work, characterization measurements, design and
develop subsystems and conduct repairs in support of the RF systems
currently installed and perform reconfiguration and design work of
planned system upgrades. This involves design using ECAD tools and
evaluation of designs using circuit simulation, as well as work on
high voltage and high power RF systems.
This includes work on pulsed megawatt klystrons and tens to hundred
kilowatt class CW tetrodes, inductive output tubes (IOT), klystrons
and solid state amplifiers along with coaxial and waveguide
transmission systems , circulators and other RF structures in the
several hundred megahertz to multiple gigahertz frequency
This position will be hired at a level commensurate with the
business needs; and skills, knowledge, and abilities of the
What You Will Do:
- Execute detailed electronics circuit design by creating
schematics, PCB layouts, simulations and all documentation required
for fabrication. Plan and execute verification testing and
- Support the ALS RF systems. Support requires the upgrade,
repair, and maintenance of the following systems:
- Electron Gun System, a thermionic gun that is pulsed at 125 MHz
and operates at an accelerating potential of 120 kV DC.
- Sub-Harmonic Buncher amplifier systems operating at 125 & 500
MHz in pulse mode at 20 kW.
- 24 MW pulsed S-Band Pulsed Modulators delivering power to the 3
GHz Linac accelerating structures.
- 80 kW CW, 500 MHz IOT based Booster Ring RF amplifier
- 65 kW CW, 500 MHz Klystron based Cavity Teststand amplifier
- 300 kW CW, 500 MHz Klystron based Storage Ring RF system.
- Solid-state RF amplifiers at 125 MHz, 500 MHz & 3 GHz.
- HVDC Power Supply systems with 208 VAC, 480 VAC and 4160 VAC
input, up to 56 kV DC output and 800 kW average power.
- Hi-speed amplifier protection systems; Thyratron crowbar and
Insulated Gate Bipolar Transistor (IGBT) disconnect switch.
- Normal conducting, Ultra High Vacuum (UHV) high-Q resonant RF
cavities at 125, 500 MHz & 1.5 & 3.0 GHz.
- Coaxial, WR-284, WR-650 and WR-1800 waveguide RF transmission
- Higher Order Mode (HOM) Damping systems.
- Temperature Controlled water cooling systems.
- Work collaboratively with a broad range of scientists and
engineers both from LBNL and from other institutions to provide
recommendations, requirements, and specifications, and implement
solutions in your area of expertise.
- Support preparation of new proposals, from the development of
technical concepts to the preparation of budgets and
- Document ongoing and completed work and present it at
conferences and workshops. Publish in relevant journals.
- Help coordinate electronic and mechanical resources needed to
complete a task or project.
- Improve documentation, baseline data, and operating and
- Adhere to the Berkeley Lab's EH&S policies and maintain all
required related training up to date.
Additional Responsibilities as needed:
- Have sufficient general electronics experience to know how to
analyze results and propose new novel systems and design
- Work in complex user facilities.
- Provide guidance to technical staff.
What is Required:
- Minimum of 5 years of related engineering experience with a
Bachelor's degree; or 3 years related experience and a Master's
degree; or equivalent work experience
- Experience in three or more of the five segments of RF
- the design, construction, implementation, operation, and
maintenance of systems involving pulsed megawatt klystrons and
hundred kilowatt class CW klystrons in the several hundred
megahertz to multiple gigahertz frequency ranges including
associated power supplies and modulators.
- Experience with E-CAD tools: schematic capture, layout,
simulation, and design for manufacture.
- Demonstrate knowledge and experience with RF and microwave
electronic instrumentation such as vector network analyzers,
spectrum/signal analyzers, signal generators, high speed
oscilloscopes, and RF power meters.
- Demonstrate strong troubleshooting and diagnostic skills in
independently resolving most RF system design and operation
- Ability to work effectively in a cross functional engineering
and scientific research team environment.
- Ph.D. and/or Master's degree in Electrical Engineering or
- 5+ years of experience working in a research and development
- Demonstrated ability to enhance capabilities to a complex user
facility, while minimizing operational impact. An example includes
upgrading tube based RF amplifiers with solid state RF
- Demonstrate ability to support the estimation of manpower,
time, and expense for the completion of projects.
- Have working knowledge of Knowledge of beam interaction with
accelerating structures and UHV materials and assembly
- Experience with 3D structure simulation tools such as Ansys
HFSS or CST Studio Suite as well as analog and RF circuit
simulation tools such as PSPICE and Keysight ADS.
- This is a full time, 2 years, term appointment with the
possibility of extension or conversion to Career appointment based
upon satisfactory job performance, continuing availability of funds
and ongoing operational needs.
- This position may be subject to a background check. Any
convictions will be evaluated to determine if they directly relate
to the responsibilities and requirements of the position. Having a
conviction history will not automatically disqualify an applicant
from being considered for employment.
- Berkeley Lab is committed to Inclusion, Diversity, Equity and
Accountability (IDEA) and strives to hire individuals from
different backgrounds, experiences, and perspectives who share
these same values and commitments.
- Work will be primarily performed at Lawrence Berkeley National
Lab, 1 Cyclotron Road, Berkeley, CA.
Based on University of California Policy - SARS-CoV-2 (COVID-19)
Vaccination Program and U.S Federal Government requirements,
Berkeley Lab requires that all members of our community obtain the
COVID-19 vaccine as soon as they are eligible. As a condition of
employment at Berkeley Lab, all Covered Individuals must
Participate in the COVID-19 Vaccination Program by providing proof
that vaccination requirements have been met or submitting a request
for Exception or Deferral. Visit covid.lbl.gov for more
Berkeley Lab is committed to Inclusion, Diversity, Equity and
Accountability (IDEA) and strives to continue building community
with these shared values and commitments. Berkeley Lab is an Equal
Opportunity and Affirmative Action Employer. We heartily welcome
applications from women, minorities, veterans, and all who would
contribute to the Lab's mission of leading scientific discovery,
inclusion, and professionalism. In support of our diverse global
community, all qualified applicants will be considered for
employment without regard to race, color, religion, sex, sexual
orientation, gender identity, national origin, disability, age, or
protected veteran status.
Equal Opportunity and IDEA Information Links:
Know your rights, click here for the supplement: Equal Employment
Opportunity is the Law and the Pay Transparency Nondiscrimination
Provision under 41 CFR 60-1.4.
Keywords: LBL, Lancaster , RF Electronics Engineer, Engineering , California City, California
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