The U.S. Department of Energy's Thomas Jefferson National Accelerator Facility has received approval for a $310 million project that will double the energy of its accelerated electron beam from 6 GeV to 12 GeV, enabling scientists to study quarks and gluons in unprecedented detail.
Researchers have found that more than half of a proton's spin comes from the orbital motion of its quarks, rather than their spinning. This new theory resolves a long-standing puzzle in physics and agrees with recent experiments and supercomputer calculations.
Researchers at Thomas Jefferson National Accelerator Facility found that protons are about 20 times more likely to pair up with neutrons in the nucleus. This discovery could have significant implications for understanding the structure of nuclear systems, from light nuclei to neutron stars.
The PEM/PET system can spot tumors half the size of standard imaging systems, and complete an image and biopsy in a similar time frame. It features high-resolution PET images of the breast, guiding needle biopsies with a robot arm.
A new analysis reveals that predicted mass scale for discovering new particles is about one TeV, more than double the previous estimate. This discovery could revolutionize particle physics research.
Researchers used human fat and pig skin to test infrared laser light, finding three wavelengths that preferentially heated fat. The results provide a proof of principle for using lasers to target sebaceous glands, potentially replacing Accutane for acne treatment.
The Jefferson Lab FEL has been recognized as one of the top 100 most technologically significant products of 2005. It provides a scaleable path for high laser output power and enables new applications in materials science, national security, and more.
A high-energy photon beam search at Jefferson Lab's CLAS collaboration found no evidence of a pentaquark, contradicting earlier reports. The new analysis, which boasted improved statistics and background understanding, revealed a much weaker signal than initial results, leading researchers to re-evaluate their findings.
The team successfully fabricated four niobium single cell cavities from large-grain and single crystal ingots, achieving an accelerating gradient of 45 MV/m, exceeding the ILC specification. This new fabrication process simplifies manufacturing, reduces cost, and improves cavity performance.
Researchers have developed a small-animal imager for dual modality imaging, enabling cancer researchers to gain physiological information on animal models of human disease. The device will be integrated with an optical-imaging system and used in research projects on a daily basis.
Researchers at JLab and College of W&M studied radiation blockers to enhance nuclear imaging accuracy. They found that higher doses of potassium iodide blocked radioactive iodine uptake better in mice. The study uses a unique medical imaging system and precise detectors, providing insights into the body's metabolism and thyroid function.
Recent experiments suggest that strange quarks may have zero contribution to the nucleon's charge and current distribution, but a positive trend is observed for the proton's magnetic moment. Further precise measurements are needed to confirm these findings.
Researchers used nuclear imaging to study how mice absorb radioactive iodine, finding that a dose five times higher than the FDA-recommended dosage is needed for effective protection. The team discovered that using this higher dose can improve image quality and reduce false-positive readings.
Researchers in the Jefferson Lab CLAS collaboration found no evidence of a pentaquark, contradicting earlier signals. The team will take more data in 2006 to search for the particle in a different channel and at higher energies.
The PEM unit detects breast cancer by pinpointing tumors with increased glucose metabolism, outperforming mammography in dense breast tissue. The device uses fluorodeoxyglucose to identify cancerous lesions, with 18 of 20 detected abnormalities proven to be cancerous.
Researchers at Jefferson Lab are adapting detector technology to develop a new gene therapy technique for cystic fibrosis, which affects 30,000 Americans. The technology allows for successful imaging of gene transfer in mice, paving the way for clinical trials.
A recent Jefferson Lab experiment, E00-116, has set a new record for the most female scientists on an experiment. The research investigated quark-hadron duality and was led by two female spokespeople, with a female postdoctoral fellow overseeing data analysis.
Jacek Sekutowicz, a visiting senior scientist at Jefferson Lab, is leading the way in cavity redesign as part of a proposed 12 GeV upgrade. He and his colleagues aim to reduce or eliminate parasitic modes using high order mode couplers, resulting in highly efficient beam passage through the cavities.
Researchers at Jefferson Lab are conducting an experiment to demonstrate energy recovery, which could lead to more efficient and powerful accelerators. By recirculating high-energy electrons, they aim to reduce RF energy usage while maintaining beam quality.
Rocco Schiavilla, Interim Theory Group Leader at Jefferson Lab, was elected APS Fellow in 2002 for his work on nuclei as systems of protons and neutrons interacting via many-body potentials. His research focuses on the development and application of this picture to explain nuclear properties over a wide range of energies.
Researchers at Jefferson Lab have successfully generated terahertz radiation 20,000 times brighter than ever before using the Free-Electron Laser. This breakthrough enables a range of applications, including enhanced detection of concealed weapons, improved medical imaging, and real-time chemical analysis.