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Hall B Postdoctoral Research Fellow
Job ID #: 12249 Location: Newport News, VA
Functional Area: Science Division: Exp Nuclear Physics
Position Type: Term Education Required: Post-Doctorate
Experience Required: Less than 1 year Relocation Provided: Yes

SALARY RANGE:  $58,300 - $87,500 (PD)
Jefferson Lab, located in Newport News, Virginia, USA, is a world-class scientific laboratory managed for the U.S. Department of Energy by Jefferson Science Associates, LLC. Its core is the Continuous Electron Beam Accelerator Facility (CEBAF). Since the commissioning of the upgraded machine and the experimental facilities for 12 GeV operations, Jefferson Lab scientists and the large, international user community are engaged in a research program addressing fundamental questions in hadronic, nuclear, and electroweak physics.

The 12 GeV program in all four experimental halls (A, B, C, and D) is now in full swing. We are currently seeking a Postdoctoral Research Fellow to be involved in the activities of Hall B.

The Hall B physics program covers a broad range of topics, the central focus being the three-dimensional imaging of the quark structure of the nucleon, one of the flagships of the Jefferson Lab 12 GeV scientific program. Other topics include experiments to measure the spectrum of excited states of the nucleon and their transition form factors, meson spectroscopy and a search for exotic states, the characterization of nucleon-nucleon correlations in nuclear matter, and a search for physics beyond the Standard Model.

CLAS12, a modern large-acceptance spectrometer designed to withstand high luminosity operation with electron beams up to 1035 cm-2s-1, is being used as the main detector in Hall B. The spectrometer allows the full reconstruction and characterization of nuclear reactions with multiple particles in the final state. It is instrumented with specialized tracking and particle identification systems, some of which are on the cutting edge of technology. Other dedicated detectors optimized for specific measurements, such as the proton charge radius and detection of physics beyond the Standard Model, extend the Hall B rich physics program.

The high-luminosity operations and the growing demands of experiments require constant improvements of operational characteristics, upgrades to the detectors, and the calibration and data reconstruction software (including AI-supported algorithms).

Working under the supervision of the Hall B staff scientists, the incumbent will be involved in:

1. Conducting an original research project within the Hall B physics program;

2. Designing and implementing simulation and reconstruction algorithms for new detectors and upgrades of the current equipment;

3. Supporting the development of existing reconstruction and calibration tools (tracking, particle identification, etc.);

4. Supporting the development of a high-level data analysis framework;

5. Supporting Hall B users in data calibration and analysis;

6. Documenting activities and providing regular updates to Hall B and CLAS12 leadership.

Education and Experience

Ph.D. degree in nuclear or particle physics and;

· Up-to-date knowledge in related scientific data collection, data management, and data analysis concepts;

· Good programming skills (JAVA/Python/C++/…);

· Knowledge or interest in high energy physics and/or nuclear physics detector simulation tools;

· Knowledge or interest in AI techniques;

· Knowledge or interest in charged particle tracking;

· Excellent communication and interpersonal skills to be able to interact effectively with a diverse group of scientists;

· Self-motivated and able to work in a team environment.

Applicants should upload a copy of their CV, and Research Statement through JLab's online application tracking system at 

Additionally, 2 letters of recommendation should be sent on your behalf to Linda Ceraul (

JSA will not sponsor H1B visas for this position

• Ability to comprehend, formulate, and communicate highly abstract concepts
• Ability to express or exchange complex ideas by means of spoken and written communication
• Ability to analyze and interpret complex data and develop models

• Ability to traverse across various locations on the laboratory site and access work areas
• Ability to lift up to 10 pounds frequently and 25 pounds occasionally
• Ability to stoop, bend over and climb ladders
• Ability to work on a computer for extended periods
• Visual capabilities sufficient to use computer workstations, read documents, and see safety alarms
• Auditory capabilities to hear safety alarms

Jefferson Science Associates, LLC (JSA) manages and operates the Thomas Jefferson National Accelerator Facility (Jefferson Lab). JSA is an Equal Opportunity Employer and does not discriminate in hiring or employment on the basis of race, color, religion, ethnicity, sex, sexual orientation, gender identity, national origin, ancestry, age, disability, or veteran status or on any other basis prohibited by federal, state, or local law. As part of the JSA’s equal employment opportunity policy, we also take affirmative action as called for by applicable laws and Executive Orders to ensure that minority group individuals, females, disabled veterans, recently separated veterans, other protected veterans, Armed Forces, and qualified disabled persons are introduced into our workforce and considered for promotional opportunities.

JSA is committed to providing reasonable accommodations for persons with disabilities (unless doing so will result in an undue hardship). If you need a reasonable accommodation for any part of the employment process, please send an e-mail to or call (757) 269-7598 to provide the nature of your request. Reasonable accommodations are considered on a case-by-case basis.

Employment with JSA is conditional upon DOE approval if at any time during your employment you are participating in a Foreign Government Talent Recruitment Program or Affiliated activity. Generally, such programs/activities include any foreign-state-sponsored attempt to acquire U.S.-funded scientific research through programs run or funded by the government that target scientists, engineers, students, academics, researchers, and entrepreneurs of all nationalities working or educated in the United States. This includes positions or appointments, both domestic and foreign, titled academic, professional, or institutional appointments whether or not remuneration is received and whether full-time, part-time or voluntary.

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