The Accelerator Systems Division (ASD) of the Advanced Photon Source (APS) at Argonne National Laboratory invites applications for a term-appointed, project-funded Assistant Physicist position in the Accelerator Operations and Physics Group. This role focuses on exploring new opportunities at the APS injection complex enabled by a state-of-the-art radio frequency photoinjector.
The successful candidate will play a key role in developing plans and participating in experimental activities to investigate the use of the photoinjector for high-charge operation, specifically for direct injection into the APS Booster ring. Responsibilities will include contributing to various aspects of the project, such as beam-dynamics modeling, spatiotemporal shaping of the photocathode drive laser, and high-resolution characterization of electron bunches. The exact scope of the applicant’s role will be refined based on their background, expertise, and interests.
In addition to supporting high-charge operation, the photoinjector is expected to deliver bright electron bunches to the Linac Extension Area (LEA), which serves as a platform for cutting-edge research and development in accelerator science and engineering.
Major Responsibilities:
Develop advanced timing and synchronization systems to enable direct injection of photoemitted bunches from the linac to the Booster. Collaborate with RF, timing, and controls teams to deploy low-noise distribution, phase references, and phase-stable triggers.
Model and optimize beam dynamics for high-brightness and high-charge operation; generate physics requirements for the direct-injection timing system via numerical simulations.
Design and implement spatiotemporal shaping of the photocathode drive laser to optimize the photoinjector beam for high-brightness and high-charge operating modes.
Plan and perform experimental measurements of photoinjector beams; characterize electron bunches using advanced beam diagnostics and translate results into operational improvements.
Document methods and results; present at internal meetings and external conferences; publish in refereed journals and proceedings.
This is a Long-Term (Fixed Term), full time position. Long-term term appointments may be extended in one-year increments, typically up to a total of three years.
Position Requirements
Demonstrated experience in one or more of the following areas:
Background in timing and synchronization for accelerators (RF reference distribution, phase noise/jitter characterization, timing system integration).
Hands-on experience with ultrafast lasers and photocathode drive-laser systems; familiarity with spatial and temporal pulse-shaping concepts.
Proficiency with beam-dynamics simulation and optimization tools (e.g., ELEGANT/MAD-X/GPT/ASTRA/IMPACT).
Experience with accelerator diagnostics and data analysis for emittance, bunch length, and longitudinal/transverse phase space.
Familiarity with EPICS-based controls in a Linux environment.
Ability to model Argonne’s core values of impact, safety, respect, integrity, and teamwork.
Interpersonal skills, oral and written communication skills, and ability to interact with people at all levels both within and outside the laboratory.
Ph.D. or equivalent (Bachelors and 5+ years' experience, Masters and 3+ years' experience, or PhD and 0+ years' experience, or equivalent) in accelerator physics or a related field.
Preferred Knowledge, Skills, and Experience
Experience implementing spatiotemporal pulse shaping (e.g., programmable dispersion, phase/amplitude modulation, adaptive optimization).
Prior work on linac-to-ring injection schemes and bunch-to-bucket timing.
Practical knowledge of RF systems, low-level RF, cavity phasing, and synchronization of laser/RF systems.
Applicants should submit a curriculum vitae, a cover letter, and a statement of research accomplishments and interests.
Job Family
Research Development (RD)
Job Profile
Physics 2
Worker Type
Long-Term (Fixed Term)
Time Type
Full timeThe expected hiring range for this position is $90,063.00 - $143,010.27.
Please note that the pay range information is a general guideline only. The pay offered to a selected candidate will be determined based on factors such as, but not limited to, the scope and responsibilities of the position, the qualifications of the selected candidate, business considerations, internal equity, and external market pay for comparable jobs. Additionally, comprehensive benefits are part of the total rewards package.
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