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    The ratios μpGEp/GMp from two JLab recoil polarization experiments, compared to the Rosenbluth separation data (left) and with several theoretical calculations (right).

  • Jefferson Lab has four experimental halls. The smallest of these is Hall B, measuring roughly 98 ft in diameter and 65 ft from floor to ceiling. From 1995 to 2012, the heart of the Hall B physics program involved the use of a particle detector system known as “CLAS,” an acronym that stands for the CEBAF Large Acceptance Spectrometer. This magnetic spectrometer was based on a superconducting toroid and measured the trajectories of charged particles created in interactions of the beam with a fixed target to determine their momenta.

  • An effect of color confinement in quantum chromodynamics (QCD) is that traditional perturbation theory breaks down at large distances and low energies. A quantitative understanding of the strong interaction in this region remains one of the greatest intellectual challenges in physics. The symmetries of QCD in the chiral limit (in which the quark mass vanishes) are an important element in resolving this problem.

  • One of the principal challenges of QCD is to bridge the small- and large-scale behavior of the strong nuclear interactions. At short distances, perturbative QCD is very successful in describing nucleon structure in terms of quarks and gluons. At large distances, the effects of confinement impose a more efficient description in terms of collective hadron degrees of freedom. Despite this apparent dichotomy, an intriguing connection has been observed between the low- and high-energy data on nucleon structure functions, which is referred to as "quark-hadron duality."

  • Jefferson Lab has four experimental halls. Hall A is the largest of these four experimental staging areas. It is 174 feet across and 80 feet tall from the floor to the highest spot on its domed ceiling. The foundation for the hall is 35 feet below ground.

    Hall A is outfitted with two primary detector systems – both high-resolution spectrometers, each weighing about 3 million pounds or 1,500 short tons. The hall is used primarily for experiments that study the structure of the nucleus and the protons and neutrons it contains.

  • Memos & Information

  • Jefferson Lab has four experimental halls. Hall C is 150 feet in diameter and 60 feet tall.

    Hall C houses two large spectrometers, the High Momentum Spectrometer and the new Super High Momentum Spectrometer.  The hall also provides space for temporary installation of other detectors such as the Neutral Particle Spectrometer and the Large Acceptance Detector.

    The research equipment in Hall C is used to study form factors and 3-D structure of simple quark systems, and short range structure in nuclei.

  • Theory and experiment combine to provide the most precise empirical extraction of the proton’s tensor charge, a fundamental property of the proton.

  • Scientists have made a new measurement that represents a breakthrough in their understanding of the proton’s mass.

  • Creative Energy. Supercharged with Science.

    Accelerate your career with a new role at the nation's newest national laboratory. Here you can be part of a team exploring the building blocks of matter and lay the ground work for scientific discoveries that will reshape our understanding of the atomic nucleus. Join a community with a common purpose of solving the most challenging scientific and engineering problems of our time.

     

    Title Job ID Category Date Posted
    Accelerator Operator 13403 Technology
    Network Engineer I 13345 Computer
    ES&H Department Head 13338 Engineering
    Geant4 Developer 13214 Computer
    Communications Office Student Intern 13310 Public Relations
    IT Project Manager 13340 Clerical/Admin
    Sustainability Engineer (Electrical) 13364 Engineering
    Lead Magnet Engineer 13366 Engineering
    MIS Application Server Administrator 13394 Computer
    DC Power Systems Electrical Engineer 13371 Engineering
    DC Power Group Leader 13380 Engineering
    Fusion Project Technician 13389 Misc./Trades
    Master HVAC Technician 13367 Misc./Trades
    HPDF Project Director 13373 Computer
    MPGD Development Physicist 13381 Science
    Science Education Administrator 13402 Clerical/Admin
    Vacuum Engineer 13396 Engineering
    Radiation Control Technician 13391 Technology
    Project Controls Analyst 13302 Clerical/Admin
    Storage Solutions Architect 13238 Computer
    Survey & Alignment Technician (Metrology) 13385 Misc./Trades
    Scientific Data and Computing Department Head 13383 Computer
    High Throughput Computing (HTC) Hardware Engineer 13197 Computer
    Magnet Group Mechanical/Electrical Designer 13388 Misc./Trades
    Mechanical Engineer III 13140 Engineering
    Deputy CNI Manager 13378 Computer
    Magnet Group Staff Engineer 13370 Engineering
    RadCon Manager 13337 Environmental Safety
    SRF Accelerator Physicist 13359 Science
    Data Center Operations Manager 13327 Engineering
    CIS Postdoctoral Fellow 13102 Science
    Administrative Assistant - Electron Ion Collider Project 13375 Clerical/Admin
    Gaseous Detector Support Staff Engineer 13400 Engineering

    A career at Jefferson Lab is more than a job. You will be part of “big science” and work alongside top scientists and engineers from around the world unlocking the secrets of our visible universe. Managed by Jefferson Science Associates, LLC; Thomas Jefferson National Accelerator Facility is entering an exciting period of mission growth and is seeking new team members ready to apply their skills and passion to have an impact. You could call it work, or you could call it a mission. We call it a challenge. We do things that will change the world.

    Welcome from Stuart Henderson, Lab Director
    Why choose Jefferson Lab
    • PASSION AND PURPOSE
      Middle School Science Bowl competitors huddle together to brainstorm the answer.
    • PASSION AND PURPOSE
      Local teachers share ideas for a classroom activity with other teachers during Teacher Night.
    • PASSION AND PURPOSE
      Two young learners hold up a model of the atom during Deaf Science Camp.
    • PASSION AND PURPOSE
      Staff Scientist Douglas Higinbotham snaps a selfie with some of the postdoc students he is mentoring.

    At Jefferson Lab we believe in giving back to our community and encouraging the next generation of scientists and engineers. Our staff reaches out to students to advance awareness and appreciation of the range of research carried out within the DOE national laboratory system, to increase interest in STEM careers for women and minorities, and to encourage everyone to become a part of the next-generation STEM workforce. We are recognized for our innovative programs like:

    • 1,500 students from 15 Title I schools engage in the Becoming Enthusiastic About Math and Science (BEAMS) program at the lab each school year.

    • 60 teachers are enrolled in the Jefferson Science Associates Activities for Teachers (JSAT) program at the lab inspiring 9,000 students annually.

    • 24 high school students have internships and 34 college students have mentorships at the lab.

       

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    Meet our people
    • Crash my Desk: Amitoj Singh – Computer Scientist

      Jefferson Lab’s diverse workforce is its strength, with a staff that includes technicians, computer scientists, engineers, physicists and support personnel, as well as nearly 1,700 scientific users who contribute to delivering the lab’s scientific mission. In this new series, Jefferson Lab is introducing our readers to the people and places who make possible its groundbreaking science.

      In this series, Jefferson Lab introduces our readers to the places where groundbreaking scientific experiments are developed and studied—our scientists’ own workspaces.

       

       

      First-generation Immigrant Brings Home Office to Hampton

      When asked to show off his workspace for this article, Computer Scientist Amitoj Singh had just moved with his family from Illinois, where he worked at Fermilab, to his home in Hampton—closer to his new job at Jefferson Lab.

      “I just finished getting my home office set up last weekend,” Singh laughed when asked to showcase his desk. “But this desk is always this tidy. One of the traits of my personality is undiagnosed Obsessive Compulsive Disorder. Since my marriage and since I’ve had two kids, I’ve become very relaxed. A mess doesn’t give me anxiety anymore, but I do like to have a tidy desk. I’m more productive.”

      Join us as we take a tour of Singh’s home office workspace and hear in his own words about the items he keeps close by:

      1. The video game driving apparatus. During the pandemic, given that all of us were sheltering at home, for my own sanity I decided to upgrade my personal desktop computer, and I wanted to build it myself. First, I assembled it and then I thought, “Wouldn’t it be cool if I got 4K graphics on it?” So, I installed a gaming video card that was initially for 4k graphics and then my mind said, “Wouldn’t it be cool to try to play games on this gaming card?”

      I played a few games. I like racing games and I involved my son, too, and we were both doing this together, so I went and bought a gaming wheel and that was a lot of fun. It came with pedals, and there was a brake, accelerator and clutch. We would play on a hardwood floor and it would slide, so then I bought a frame. What you see in the photo is the completed version of our anti-slide, gaming invention. There’s a frame and pedals, and on weekends, we play racing games.

      It’s about four feet tall, and it’s adjustable for my height and my son’s height. My father was a mechanical engineer. Growing up, he was a role model to me and was always explaining how things work. I share a passion for cars with my son. During our one-on-one talks, he might ask how the engine works or brake works, and I’m able to tell him because I learned from my father.

      I’m a mechanical engineer at heart. I like to seek out knowledge on how things work and so does my son. We like watching shows on how things are made—like how bridges built and how oil rigs work. All through my life, I’ve had this inquisitiveness to know how things work.

      2. Apple Airpod Max Pro headphones. I bought these because right now I’m remote-working and I need something that’s reliable and of a good quality to hear my colleagues during meetings—even when my kids are playing nearby. I also love music, and having these is like having high-end speakers.

      3. Bataviapoly. Before moving to Virginia to work at Jefferson Lab, we lived in a place called Batavia in Illinois. I found this Monopoly game that is based on the local city. It has Batavia street names, the fire department, and it even has Fermilab, my previous employer. As a family, we love to play Monopoly, and this reminds of all the places we’ve been. 

      4. Lens wipes for my glasses. That’s my eyeglass case next to the bottle.

      5. Beer bottle filled with sand. Several years ago, my wife and I went to Cancun, Mexico. On the last day, the ocean was amazing—no offense to Buckroe Beach in Hampton. The water was crystal clear and as soon as you stepped into the water you could see all the way to the bottom. All I wanted to do was sit at the beach and do nothing and I thought, “If only I could take a piece of Cancun with me. Why not just put sand inside this bottle I’m drinking?” And I did. I keep it on my desk just to look at the bottle, and I dream up memories of myself hearing the waves splashing and seeing the clear blue water.

      6. The desktop background photo on my computer was taken in Leadville, Colorado. It’s the tallest peak in Colorado. The person on the left, that is Don Holmgren. We worked together until 2014 when he retired. He said he was going to retire in Colorado. He and his wife found a house in Leadville up in the mountains, and my family and I went to go visit. It was great for me to meet with him and see him in person. He’s had a big positive impact on my life. He hired me at Fermilab in 2002 when I just came out of college at the University of Houston. He’s been my mentor, a good friend and an amazing boss.

      He’s into astronomy, as well. In his backyard, he has one of those huge telescopes. At night, he showed us galaxies and planets, and my son was in awe.

      7. Model car of a Le Mans Fifth Generation Corvette. I’m into race cars, and my favorites are Corvettes. I love American muscle cars. With Corvettes, they have generations for new designs. This model is of a fifth generation. We are now in the eighth generation of the Corvette. This model is a racing version of the fifth generation street Corvette.

      There’s a famous racing competition called Le Mans. It’s a 24-hour race, and it’s very old. Most cars are Lamborghini, Aston Martin, Lexus…basically anyone who makes a sports car. The rules for the race are that you have to use the same engine from the street version of the car (the version you might sell to consumers), but you’re allowed to make modifications to the outside of the car.

      Then you have to race that car for 24 hours. You can change drivers and have pit stops. Your car has to survive 24 hours going between 100 and 200 miles-per-hour.

      So that model car is a Le Mans version of a fifth generation Corvette that has side exhaust pipes and is made of carbon fiber. I used to own a fifth generation Corvette. Now I drive a Honda Odyssey minivan because I have kids and a dog (*Laughs*).

      8. Books. The top book is, “Parallel Programming with MPI” by Peter Pacheco. MPI stands for, “Message Passing Interface,” which is a programming language. The other book is “Computer Networks and Internets” by Douglas Comer. The reason I keep that book is because in your life, sometimes you have an incredible teacher where others may fade into memory. As a graduate at the University of Houston, I had a professor who was a student of Ken Kennedy. In the world of high-performance computing, people know about Kennedy. Everyone looked forward to my professor’s class. He gave out copies of this book to all of his students. Everything I learned in his class in 1999 still applies, and it’s a book I cherish and I do reference it.

      Not seen, but felt daily in his work at the lab: I also want to say that I am a first-generation immigrant from North India who is living the example of the American dream.

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    The Jefferson Lab campus is located in southeastern Virginia amidst a vibrant and growing technology community with deep historical roots that date back to the founding of our nation. Staff members can live on or near the waterways of the Chesapeake Bay region or find peace in the deeply wooded coastal plain. You will have easy access to nearby beaches, mountains, and all major metropolitan centers along the United States east coast.

    To learn more about the region and its museums, wineries, parks, zoos and more, visit the Virginia tourism page, Virginia is for Lovers

    To learn more about life at Jefferson Lab, click here.

     

    We support our inventors! The lab provides resources to employees for the development of patented technology -- with over 180 awarded to date! Those looking to obtain patent coverage for their newly developed technologies and inventions while working at the lab are supported and mentored by technology experts, from its discovery to its applied commercialization, including opportunities for monetary awards and royalty sharing. Learn more about our patents and technologies here.

    • Scott Conley
      Scott Conley
      Environmental Management Team

      "There is world-class research going on here. Any given day you can be in the room with genius physicists and that’s just amazing.”

    • Ron Lassiter
      Ron Lassiter
      Mechanical Designer

      “Here at the lab you get to see what you’ve worked on. You can hold it in your hands. It’s rewarding to know that you’ve played a part in helping the machine to be successful.”

    • Jian-Ping Chen
      Jian-Ping Chen
      Senior Staff Scientist

      “Every time we solve problems, we contribute. It’s exciting times for new results and discoveries.”

    • Pashupati Dhakal
      Pashupati Dhakal
      Accelerator Operations

      "Not every day is the same day. Working in research and development, it’s not a one person job."

    • Kim Edwards
      Kim Edwards
      IT Division/Information Resource

      "When I’m 95 years old, I hope I will be one of those people who worked in the background to affect other people’s lives for the better."

    Jefferson Science Associates, LLC manages and operates the Thomas Jefferson National Accelerator Facility. Jefferson Science Associates/Jefferson Lab is an Equal Opportunity and Affirmative Action 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.

    If you need a reasonable accommodation for any part of the employment process, please send an e-mail to recruiting @jlab.org or call (757) 269-7100 between 8 am – 5 pm EST to provide the nature of your request.

    "Proud V3-Certified Company"

    A Proud V3-Certified Company
    JSA/Jefferson Lab values the skills, experience and expertise veterans can offer due to the myriad of experiences, skill sets and knowledge service members achieve during their years of service. The organization is committed to recruiting, hiring, training and retaining veterans, and its ongoing efforts has earned JSA/Jefferson Lab the Virginia Values Veterans (V3) certification, awarded by the Commonwealth of Virginia.