With confirmation that LZ and its systems are operating successfully, Lesko said, it is time for full-scale observations to begin in hopes that a dark matter particle will collide with a xenon atom in the LZ detector very soon.
#Zeplin software
Maria Elena Monzani of SLAC, the Deputy Operations Manager for Computing and Software, said “We had amazing scientists and software developers throughout the collaboration, who tirelessly supported data movement, data processing, and simulations, allowing for a flawless commissioning of the detector. Turning on a new experiment is challenging, but we have a great LZ team that worked closely together to get us through the early stages of understanding our detector,” said David Woodward from Pennsylvania State University who coordinates the detector run planning. “Lots of subsystems started to come together as we started taking data for detector commissioning, calibrations and science running.
#Zeplin full
“I’d like to second the praise for the team at SURF and would also like to express gratitude to the large number of people who provided remote support throughout the construction, commissioning and operations of LZ, many of whom worked full time from their home institutions making sure the experiment would be a success and continue to do so now,” said Tomasz Biesiadzinski of SLAC, the LZ detector operations manager. The team in South Dakota took excellent care of LZ. He said with travel severely restricted, only a few LZ scientists could make the trip to help on site.
The LZ team has been a wonderful partner and we’re proud to host them at SURF.”įiorucci said the onsite team deserves special praise at this startup milestone, given that the detector was transported underground late in 2019, just before the onset of the COVID-19 pandemic. Mike Headley, executive director of SURF Lab, said, “The entire SURF team congratulates the LZ Collaboration in reaching this major milestone. Funding came from the South Dakota Governor’s office, the South Dakota Community Foundation, the South Dakota State University Foundation, and the University of South Dakota Foundation. Department of Energy, secured 80 percent of the xenon in LZ.
The South Dakota Science and Technology Authority, which manages SURF through a cooperative agreement with the U.S. The characteristics of the scintillation help determine the types of particles interacting in the xenon. The collisions will also knock electrons off xenon atoms, sending them to drift to the top of the chamber under an applied electric field where they produce another flash permitting spatial event reconstruction. “Considering we just turned it on a few months ago and during COVID restrictions, it is impressive we have such significant results already.” “The collaboration worked well together to calibrate and to understand the detector response,” Manalaysay said. Particle collisions in the xenon produce visible scintillation or flashes of light, which are recorded by the PMTs, explained Aaron Manalaysay from Berkeley Lab who, as physics coordinator, led the collaboration’s efforts to produce these first physics results. The experiment is underground to protect it from cosmic radiation at the surface that could drown out dark matter signals. Tucked away about a mile underground at SURF in Lead, S.D., LZ is designed to capture dark matter in the form of weakly interacting massive particles (WIMPs).
This “missing mass” is considered to be one of the most pressing questions in particle physics. For example, the presence of dark matter, estimated to be about 85 percent of the total mass of the universe, shapes the form and movement of galaxies, and it is invoked by researchers to explain what is known about the large-scale structure and expansion of the universe. Unseen, because it does not emit, absorb, or scatter light, dark matter’s presence and gravitational pull are nonetheless fundamental to our understanding of the universe. WIMPs (weakly interacting massive particles) are among the top prospects for explaining dark matter.
LZ is 100 times more sensitive to finding signals from dark matter particles than its predecessor, the Large Underground Xenon experiment (LUX), which was decommissioned to make way for LZ. The LZ collaboration includes approximately 220 participating scientists and engineers representing 38 institutions around the world. LUX-ZEPLIN (LZ) became the world's most sensitive dark matter detector with the announcement of first results on July 7, 2022.ĭeep below the Black Hills of South Dakota in the Sanford Underground Research Facility (SURF), LZ is an innovative and uniquely sensitive dark matter experiment led by Lawrence Berkeley National Lab (Berkeley Lab).
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