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Lewandowski double helps Barca to 3-0 win over Brest in Champions LeagueNonlinear compton scattering with a multi-petawatt laser producing ultra-bright gamma rays November 25, 2024 Institute for Basic Science A team of researchers has successfully demonstrated nonlinear Compton scattering (NCS) between an ultra-relativistic electron beam and an ultrahigh intensity laser pulse using the 4-Petawatt laser. The innovative approach was the usage of only a laser for electron-photon collisions, in which a multi-PW laser is applied both for particle acceleration and for collision (also called an all-optical setup). This achievement represents a significant milestone in strong field physics, in particular strong field quantum electrodynamics (QED), offering new insights into high-energy electron-photon interactions without the need for a traditional mile-long particle accelerator. Facebook Twitter Pinterest LinkedIN Email In a groundbreaking study recently published online in the journal Nature Photonics , a team of researchers has successfully demonstrated nonlinear Compton scattering (NCS) between an ultra-relativistic electron beam and an ultrahigh intensity laser pulse using the 4-Petawatt laser at the Center for Relativistic Laser Science (CoReLS) within the Institute for Basic Science at Gwangju Institute of Science and Technology (GIST), Korea. The innovative approach was the usage of only a laser for electron-photon collisions, in which a multi-PW laser is applied both for particle acceleration and for collision (also called an all-optical setup). This achievement represents a significant milestone in strong field physics, in particular strong field quantum electrodynamics (QED), offering new insights into high-energy electron-photon interactions without the need for a traditional mile-long particle accelerator. Nonlinear Compton scattering requires an electron to absorb multiple laser photons while emitting a single high-energy gamma-ray photon. To observe this phenomenon, researchers approached the "Schwinger limit" -- a theoretical laser intensity (2x10 29 W/cm 2 ) so strong that it "boils" the vacuum of space-time, for generating matter-antimatter pairs. Since the current record for the highest laser intensity in the world, demonstrated by CoReLS, is still a million times below this threshold, the team employed a workaround: an ultra-relativistic electron beam collided with an ultrahigh intensity laser pulse, exploiting Einstein's theory of relativity. In the electron's reference frame, the laser intensity appeared to be about 50% of the Schwinger limit, triggering nonlinear QED phenomena. The scientists conducted a series of experiments using the CoReLS PW laser. The laser beam was split into two beams, each serving distinct roles. The first beam was focused onto a 5-cm-long gas-filled cell, where it triggered "laser wakefield acceleration" (LWFA) of electrons. In this mechanism of acceleration, electrons "surf" a laser-generated plasma wave, gaining an energy up to 3 GeV -- 99.999999% of the speed of light. The second beam was a flash of light focused to a 2-micron diameter (a few % of a hair diameter), lasting only 20 femtoseconds (a femtosecond represents a billionth of a millionth of a second). This beam was directed to collide with the accelerated electrons coming out of the plasma in the gas cell. Achieving the precise overlap required for the collision, within a few microns and 10 femtoseconds, allowed the laser pulse to "shake" the electrons, which bounced up to 400 laser photons, absorbing them simultaneously. The absorbed energy was then emitted as a single high-energy gamma-ray photon with energy in the range of tens to hundreds of megaelectronvolts. Researchers carefully characterized the gamma-ray energy, aided by Monte-Carlo simulations, to ensure that other x-ray and gamma-ray backgrounds did not interfere with the measurements. They verified the gamma-ray signatures against theoretical predictions and compared the experimental results with analytical models and particle-in-cell simulations performed using supercomputers. The agreement between the experiment and simulation confirmed the occurrence of nonlinear Compton scattering and allowed the team to deduce the colliding laser intensity by extracting its "fingerprint" from the gamma-ray signals. Due to the large number of collisions, the resulting gamma-ray beam produced in experiments was 1,000 times brighter than anything previously achieved in laboratories at this energy scale. This breakthrough has potential applications in studying nuclear processes and understanding antimatter production, such as the Breit-Wheeler process for exploring photon-photon collisions to produce electron-positron pairs. This research, published in Nature Photonics, is part of a broader effort to understand quantum electrodynamics (QED) in strong background fields, also known as Strong-Field Quantum Electrodynamics. The research can mimic laboratory phenomena typically found in astrophysical objects like magnetars, supernovae, and the regions in the vicinity of black holes. The first study using a laser-electron beam collision was performed at SLAC in 1996, but using a kilometer-long accelerator and a much less intense laser. Similar experiments are planned also at accelerator facilities such as the DESY (LUXE project, Germany), SLAC (FACET II, USA), and upcoming multi-petawatt laser facilities like Apollon (France), Station for Extreme Light (China), ELI-NP (Romania), ELI-Beamlines (Czech Republic), or Omega EP OPAL (U. Rochester) and ZEUS (U. Michigan, USA). Story Source: Materials provided by Institute for Basic Science . Note: Content may be edited for style and length. Related Multimedia : Journal Reference : Cite This Page :

Baltimore Ravens leading receiver Zay Flowers is questionable for Wednesday's game against the host Houston Texans because of a shoulder issue. Flowers was listed on the team's injury report after missing practice on Sunday and Monday and being limited on Tuesday. Cornerback Tre'Davious White (shoulder) has followed the same pattern in practice participation and also is questionable. The Ravens ruled out wide receiver Nelson Agholor and running back Justice Hill due to concussions, and neither practiced Sunday, Monday or Tuesday. Cornerback Jalyn Armour-Davis (hamstring) also missed practice this week and is out. Flowers, 24, leads the Ravens with 71 receptions, 109 targets and 1,016 receiving yards in 15 games (13 starts). He has four touchdowns. Baltimore selected him 22nd overall in the 2023 NFL Draft out of Boston College. He has 148 career receptions for 1,874 yards and nine TDs in 31 games (29 starts). Flowers has not missed a game because of injury in his brief NFL career. White, 29, has appeared in five games and has seven tackles. He was a Pro Bowl selection in 2019 and 2020 and first-team All-Pro in 2019 during his first seven NFL seasons with the Buffalo Bills. Hill, 27, has 47 carries for 228 yards and one touchdown this season in 15 games as a reserve. He also has 42 receptions for 383 yards and three TDs. The Ravens selected Hill in the fourth round of the 2019 draft. He has 250 rushing attempts for 1,162 yards and six TDs, and 95 receptions for 737 yards and four scores. Agholor, 31, will miss his second consecutive game. He has 14 receptions on 29 targets for 231 yards and two touchdowns in 14 games (seven starts). He has 389 career receptions for 3,858 yards and 37 TDs in 149 games (105 starts) for the Philadelphia Eagles (2015-19), Las Vegas Raiders (2020), New England Patriots (2021-22) and Ravens (2023-present). Armour-Davis, 25, has played in seven games (two starts) this season and has eight tackles. The Ravens picked him in the fourth round of the 2022 draft out of Alabama. The Ravens (10-5) elevated wide receiver Anthony Miller from the practice squad to the active roster for the game against the Texans (9-6). --Field Level MediaSilentSwap Introduces Privacy-Focused DEX Aggregator on Secret Network

No. 2 Ohio State takes control in the 2nd half and runs over No. 5 Indiana 38-15has seen it all during his illustrious coaching career, so navigating a challenging schedule isn't new to him. However, with the ' grueling lineup to close the 2024 NFL season, even the seasoned coach couldn't resist offering a clever response when pressed about the situation. As the defending Super Bowl champions, the have faced a relentless schedule this year. From high-stakes matchups to back-to-back short weeks, Reid's tactful approach has made waves, showcasing his knack for dodging potential controversy. The Chiefs, But it hasn't come without its challenges. The final stretch of the season features a daunting three games in just 11 days, forcing the team to quickly recover and prepare between matchups. When asked by a reporter whether the condensed schedule was excessive, . "Oh, that's a tough question," he remarked with a wry smile. "I mean... I'll let you figure that one out. Or you can pay my fine." The room erupted in laughter, a hallmark of . His comment was a calculated move-lighthearted enough to avoid backlash from the league but pointed enough to resonate with fans and players alike. Chiefs' resilience tested The Chiefs began this challenging stretch with a decisive 21-7 victory over the Cleveland Browns, showcasing their depth and adaptability. Days later, they faced the Houston Texans in a tough home game but emerged victorious, thanks to standout performances from their key players. Now, just days after their latest win, Kansas City is set to face the Pittsburgh Steelers on Christmas Day-a testament to the unforgiving nature of the NFL schedule. While Reid remains measured in his comments, Chiefs quarterback Patrick Mahomes has been more vocal about the toll this schedule takes. "It's not a great feeling," Mahomes admitted recently. "You never want to play this many games in such a short span. But it's part of the job. You just have to push through." Despite the challenges, Reid has kept his focus on what the team can control. Earlier this month, he emphasized the importance of adaptability: "It is what it is. You just have to manage it and make the best of it." Reid's response not only highlights his experience but also underscores the broader conversation about player safety and workload in the NFL. As fans and analysts debate the fairness of such tight scheduling, the Chiefs continue to prove their resilience under pressure, with their coach leading the way-one clever quip at a time.Conference title games a chance at a banner, bragging rights and, for some, a season-wrecking loss

In the heart of Osaka, Japan, a technological relic faced imminent destruction. The world’s largest consumer CRT television, a behemoth Sony KX-45ED1, sat perched precariously on the second floor of a soon-to-be-demolished noodle shop. This wasn’t just any old television; this was a legendary piece of tech history, a 440-pound, 45-inch titan that originally sold for a staggering $40,000 back in the late 1980s. But its fate seemed sealed, destined for the scrap heap along with the building it resided in. Enter Shank Mods, a passionate gaming enthusiast with a penchant for rescuing vintage electronics. Hearing of the TV’s plight, he embarked on a two-week international rescue operation, coordinating with local contacts and navigating the complexities of industrial shipping to save this endangered species of the tech world. Why all this effort for an outdated piece of technology? For retro gaming enthusiasts, the Sony KX-45ED1, also known as the PVM-4300, represents the pinnacle of display technology. Its massive screen and authentic, lag-free performance are unmatched by modern LCD or OLED screens . Imagine experiencing classic games like Pac-Man or Donkey Kong in their original glory, with vibrant colors and crisp details, on a screen that dwarfs even today’s largest TVs. This wasn’t just about saving a TV; it was about preserving a piece of gaming history and ensuring future generations could experience the magic of retro gaming as it was meant to be seen. A Race Against Time The clock was ticking. With demolition looming, Shank Mods had to act fast. He connected with a local contact in Osaka, a fellow vintage tech enthusiast who was able to confirm the TV’s existence and its precarious situation. The challenge was immense. Extracting a 440-pound television from the second floor of a building slated for demolition was no easy feat. It required specialized equipment, skilled technicians, and careful planning to ensure the TV wasn’t damaged in the process. Adding to the complexity, this wasn’t just a local move. Shank Mods, based in the US, had to arrange for international shipping, navigating customs regulations and logistical hurdles to bring his prize possession across the Pacific. It was a race against time, a high-stakes operation with the potential for disaster at every turn. The Bigfoot of CRTs The Sony KX-45ED1 is a rare breed. Only a handful are known to exist, making it a true collector’s item. Shank Mods, in his YouTube video documenting the rescue, likened it to “the Bigfoot of CRTs,” a mythical creature rarely seen in the wild. This rarity stems from its original price tag and limited production run. At $40,000 in the 1980s, it was a luxury item few could afford. Its primary market was professional studios and high-end businesses, not everyday consumers. The TV’s scarcity has fueled its legendary status among retro gaming enthusiasts. While images and marketing materials existed, there was little evidence of a functioning unit in private hands. Shank Mods’ rescue mission offered a glimmer of hope, a chance to not only preserve this technological marvel but also to document it for the world to see. A Community Effort While Shank Mods spearheaded the rescue, it was a collaborative effort. His online following , eager to see this piece of history saved, provided support and encouragement. Local contacts in Osaka played a crucial role, acting as boots on the ground to assess the situation and coordinate the extraction. Even the noodle shop owner, recognizing the TV’s significance, granted access and cooperated with the rescue effort. This sense of community, united by a shared passion for gaming history, was instrumental in the TV’s salvation. It highlights the power of collective action and the impact individuals can have when they come together for a common cause. More Than Just a TV The Sony KX-45ED1 is more than just a television; it’s a symbol of a bygone era of technology. It represents a time when electronics were built to last, with craftsmanship and quality taking precedence over planned obsolescence. In a world of disposable gadgets, this CRT behemoth stands as a testament to enduring engineering. But it’s also a reminder of how quickly technology evolves. What was once cutting-edge is now considered vintage, a relic of the past. Preserving these artifacts is crucial, not just for nostalgia’s sake but also to understand the trajectory of technological advancement. By studying the past, we can gain insights into the future, appreciate the innovations that have shaped our world, and perhaps learn from the mistakes of previous generations. What’s Next for the World’s Largest CRT? Now safely in the hands of Shank Mods, the Sony KX-45ED1 has a bright future ahead. Initial plans include a full restoration to ensure it’s functioning optimally. Shank Mods, known for his meticulous work in restoring vintage electronics, will undoubtedly give this TV the royal treatment it deserves. Beyond restoration, there’s talk of showcasing the TV at public exhibits and retro gaming events , allowing others to experience its grandeur firsthand. Imagine a museum dedicated to the history of video games, with the Sony KX-45ED1 as its centerpiece, a monument to the golden age of gaming. This rescue mission was more than just saving a TV; it was about preserving a piece of our shared cultural heritage. It’s a testament to the passion of individuals like Shank Mods, who dedicate their time and resources to ensuring that the history of technology is not forgotten. And as we move further into the digital age, it’s a reminder that sometimes, the greatest treasures are found in the relics of the past.The 39-year-old takes charge for the first time in Sunday’s Premier League trip to promoted Ipswich having been confirmed as Erik ten Hag’s successor at the beginning of November. Amorim has made a positive impression since starting work at the United in an international fortnight that ended with an impressive first appearance in front of the media. 🆚 Ipswich Town.🏟️ Portman Road.⏰ 16:30 GMT. 🫡 We will be there. #MUFC pic.twitter.com/0eHCSDYmhE — Manchester United (@ManUtd) November 21, 2024 The Portuguese was gregarious, engaging and smiley throughout Friday’s press conference but that warmth comes with a ruthlessness edge if players do not adhere to his approach. “You can be the same person,” head coach Amorim said. “Be a positive person that can understand this is one place to be, then there is the dressing room, there are some places to have fun, there are some places to work hard. “So, I can be ruthless when I have to be. If you think as a team, I will be the nicest guy you have ever seen. If there is someone just thinking about himself, I will be a different person. “I’m not that type of guy that wants to show that he is the boss. “They will feel it in the small details, that I can be the smiling one but then when we have a job to do I will be a different person, and they understand that.” ‘The Smiling One’ follows ‘the Special One’ as United’s second Portuguese manager, with Jose Mourinho one of five managers to try and fail to reach the heights scaled by Sir Alex Ferguson. The Scot retired as a Premier League champion in 2013 and the Red Devils have failed to launch a sustained title bid since adding that 20th top-flight crown. Asked about whether he will lean on Ferguson to understand the history of United and whether he has met him, Amorim said: “No, not yet. I didn’t have that opportunity. “It’s hard to copy someone, so I have to be me. Of course I’m not the best person in here to show the history of Manchester United. “It should be the club first and also me because I’m always paying attention on those details and try to focus our players in the history of the club, not the recent history. “You have to be very demanding. This is a club that needs to win, has to win, so we have to show that to our players but it’s a different time. “I cannot be the same guy that Sir Alex Ferguson was. It’s a different time. “I have to have a different approach, but I can also be demanding with a different approach, so that is my focus.” Like Ferguson in 1986, Amorim starts life at United in the November of a season that started with a paltry points tally. The 39-year-old acknowledges the timing makes “it’s so much harder” for him to imprint his style at a club whose youth foundations look in safe hands. “It’s the project of Manchester United,” Amorim said. “Nowadays, you need young guys, guys from the academy for everything. “To bring that history of the club because they feel the club in a different way. “And also because you have all these rules with financial fair play, when a player from our academy is so much different to the players that we bought and then we sell. “So, everything is connected. I will try to help all the players, especially the young ones.” Amorim’s first match will be a fascinating watch for onlookers, who have kept a particularly close eye on his work during his farewell to Sporting Lisbon. The Portuguese managed three final matches after being confirmed as United head coach, including a 4-1 Champions League win against Manchester City. Pep Guardiola’s side have dominated English football in recent years and the City boss this week signed a new deal until 2027. “I think it’s a problem for everybody here, but we have so much to do, we cannot focus on anyone,” Amorim said. “We just have to focus on our club, improve our club and not focus on the other clubs, so let’s focus on Manchester United. “It’s amazing (the test) – if you can beat that team it’s a good sign but, like I said, we are focused on Manchester United.”

A 7-year-old boy critically injured Saturday by a falling drone during a holiday show in downtown Orlando remains in intensive care, his mother said Monday in a post on a GoFundMe page. “Zander is out of surgery and still fighting!” Jessica Lumedge wrote. “I will be missing work at this time, and he will be celebrating Christmas in the ICU.” The boy, Alezander, underwent emergency open-heart surgery Sunday after one of several drones that fell from the sky during the Holiday Drone Show at Lake Eola Park struck him in the chest and mouth. The Federal Aviation Administration announced Saturday evening on X, formerly Twitter, that it’s investigating. It remained unclear Tuesday what caused the drones to collide and fall. About 25,000 people attended the evening event. Adriana Edgerton, the boy’s other mother, said in an interview with WESH-TV that her family was watching the show when multiple drones fell from the sky. “Everyone’s natural instinct was to duck and scatter,” Edgerton said. “Before we realized it, my daughter found my son on the floor unconscious. He had blood coming out of his face.” An Orlando city spokesperson Tuesday did not return a message seeking comment. The city had said in a news release that there were “technical difficulties” during the show. Just before 7 p.m. the Orlando Fire Department responded to calls that a person was injured by a drone, according to the release. The city then canceled the 8 p.m. show. The show was organized by Sky Elements based in Fort Worth, Texas. Representatives did not return calls or emails Tuesday seeking comment. A company statement released Sunday said: “Sky Elements Drones wants to extend our sincere hope for a full and speedy recovery for those impacted at our Lake Eola show.” On its website, the company states that one of its missions is safety and “protecting onlookers, staff members and property at all times.” “Safety is our number one priority, borderline obsessed,” the website states. Videos from the Orlando show posted on social media show multiple green and red drones falling from the sky. In one video posted to X, user MosquitoCoFL Podcast showed drones falling as Lake Eola’s famous swans vigorously flapped their wings and quickly moved away.76ers center Joel Embiid sidelined due to swelling in his left knee and will miss two games PHILADELPHIA (AP) — The Philadelphia 76ers say center Joel Embiid is managing swelling in his left knee and will miss a second consecutive game Sunday. The Sixers issued a statement on the condition of the 2023 NBA MVP at halftime of Friday’s NBA Cup game against the Brooklyn Nets, saying the decision to sideline Embiid was made along with the team’s medical staff. Embiid was ruled out prior to Friday’s game against the Nets due to what the team described as left knee injury maintenance. The Sixers host the Los Angeles Clippers on Sunday. Giants release quarterback Daniel Jones just days after benching him EAST RUTHERFORD, N.J. (AP) — The Daniel Jones era in New York is over. The Giants quarterback was granted his release by the team just days after the franchise said it was benching him in favor of third-stringer Tommy DeVito. New York president John Mara said Jones approached the team about releasing him and the club obliged. Mara added he was “disappointed” at the quick dissolution of a once-promising relationship between Jones and the team. Giants coach Brian Daboll benched Jones in favor of DeVito following a loss to the Panthers in Germany that dropped New York's record to 2-8. Austin Hays, Kyle Finnegan, Brendan Rodgers and Jordan Romano among 62 new free agents NEW YORK (AP) — Outfielder Austin Hays, right-hander Kyle Finnegan and second baseman Brendan Rodgers were among 62 players who became free agents when their teams failed to offer 2025 contracts. Right-hander Jordan Romano, left-hander Patrick Sandoval and outfielders Michael Tauchman and Ramón Laureano also were among the players cut loose, many of whom would have been eligible for salary arbitration. Washington cut right-hander Tanner Rainey, its last remaining player from the 2019 World Series champions. Finnegan and Hays are former All-Stars. Conor McGregor must pay $250K to woman who says he raped her, civil jury rules LONDON (AP) — A civil jury in Ireland has awarded more than $250,000 to a woman who says she was raped by mixed martial arts fighter Conor McGregor in a Dublin hotel penthouse after a night of heavy partying. The jury on Friday awarded Nikita Hand in her lawsuit that claimed McGregor “brutally raped and battered” her in 2018. The lawsuit says the assault left her heavily bruised and suffering from post-traumatic stress disorder. McGregor testified that he never forced her to do anything and that Hand fabricated her allegations after the two had consensual sex. McGregor says he will appeal the verdict. Russell puts Mercedes on pole at Las Vegas and Verstappen nips Norris in championship battle LAS VEGAS (AP) — George Russell put Mercedes on the pole for the Las Vegas Grand Prix in an upset over teammate Lewis Hamilton. Hamilton was fastest in the first two practice sessions with Russell fastest in Friday night’s third and final session. But come qualifying, Hamilton made two mistakes in the final group and wound up a distant 10th. Carlos Sainz Jr. and Charles Leclerc seemed to sweep the front row until Russell’s late lap pushed Sainz to second. Pierre Gasly slid into third, and Leclerc wound up fourth. Championship leader Max Verstappen of Red Bull qualified fifth for Saturday night's race. Verstappen needs only to score three points more than challenger Lando Norris to win his fourth straight world championship. Week 16 game between Denver Broncos and Los Angeles Chargers flexed to Thursday night spot The Los Angeles Chargers have played their way into another prime time appearance. Justin Herbert and company have had their Dec. 22 game against the Denver Broncos flexed to Thursday night, Dec. 19. Friday’s announcement makes this the first time a game has been flexed to the Thursday night spot. The league amended its policy last season where Thursday night games in Weeks 13 through 17 could be flexed with at least 28 days notice prior to the game. The matchup of AFC West division rivals bumps the game between the Cleveland Browns and Cincinnati Bengals to Sunday afternoon. Chase Elliott named NASCAR's most popular driver for 7th straight season CHARLOTTE, N.C. (AP) — Chase Elliott has been named NASCAR's most popular driver for the seventh straight year. He was announced Friday at NASCAR's annual season-ending awards ceremony. It's the only major NASCAR award determined solely by the vote of race fans. Elliott beat out Hendrick Motorsports teammate Kyle Larson and Team Penske’s Ryan Blaney, per results released by the National Motorsports Press Association. Bill Elliott, Chase's father who is nicknamed “Awesome Bill from Dawsonville,” was named NASCAR’s most popular driver a record 16 times before removing his name from the ballot. Either an Elliott or Earnhardt has won NASCAR’s most popular driver award for 34 consecutive years. NBA memo to players urges increased vigilance regarding home security following break-ins MIAMI (AP) — The NBA is urging its players to take additional precautions to secure their homes following reports of recent high-profile burglaries of dwellings owned by Milwaukee Bucks forward Bobby Portis and Kansas City Chiefs teammates Patrick Mahomes and Travis Kelce. In a memo sent to team officials, a copy of which was obtained by The Associated Press, the NBA revealed that the FBI has connected some burglaries to “transnational South American Theft Groups” that are “reportedly well-organized, sophisticated rings that incorporate advanced techniques and technologies, including pre-surveillance, drones, and signal jamming devices.” US ski star Shiffrin leads World Cup slalom after 1st run and closes in on career win No. 99 GURGL, Austria (AP) — Mikaela Shiffrin closed in on what would be the American ski star’s career win No. 99 by setting the pace in the opening run of a women’s World Cup slalom. Shiffrin wasn’t clean going into the steep of the Kirchenkar course but gained time on all competitors with a near-flawless finish section. Wendy Holdener was fastest at the first two splits and the Swiss racer trailed Shiffrin by 0.13 seconds at the finish. Shiffrin says she was feeling "a little bit funky on some spots.” A victory would give Shiffrin five chances to compete for win No. 100 during a North American sweep of the World Cup starting next week. Brock Purdy will miss Sunday's game for the 49ers with a shoulder injury SANTA CLARA, Calif. (AP) — San Francisco 49ers quarterback Brock Purdy will miss Sunday’s game against the Green Bay Packers with a sore throwing shoulder. Purdy injured his right shoulder in last Sunday’s loss to the Seattle Seahawks. Purdy underwent an MRI that showed no structural damage but the shoulder didn’t improve during the week and Purdy was ruled out for the game. Coach Kyle Shanahan said star defensive end Nick Bosa also will miss the game with injuries to his left hip and oblique. Left tackle Trent Williams is questionable with an ankle injury and will be a game-time decision.