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Photo of Berkeley Lab scientist Tong Zhou working on lasers at a lab table. Photo - This BELLA HTT laser system enables multipulse, high-energy-density photon sources for LaserNetUS and other experiments. (Credit: Berkeley Lab) Photo - Sam Barber, left, a research scientist at Berkeley Lab’s BELLA Center, and Jeroen van Tilborg, a staff scientist at the BELLA Center, hold the active plasma lens, right, and dipole magnets used in an electron-beam diagnostic experiment. Combined, the magnets allowed measurements of electron-beam energy, with range and resolution comparable to what is achieved using the multi-ton magnet located behind them. (Credit: Marilyn Sargent/Lawrence Berkeley National Laboratory) Photo - Berkeley Lab’s BELLA Center houses the BELLA petawatt laser, shown here, and a 100-terawatt-class laser. (Credit: Roy Kaltschmidt/Berkeley Lab) Photo - Proton-beam therapy at the Paul Scherrer Institute in Switzerland. A Berkeley Lab researcher is working with PSI and Varian Medical Systems to develop a new system with improve beam performance. (Credit: Center for Proton Therapy/PSI) Photo - A worker inspects the soft X-ray undulator at SLAC National Accelerator Laboratory. The hard X-ray undulator is visible at right. (Credit: SLAC National Accelerator Laboratory) Image - A photo illustration showing magnified virus particles in droplets. (Credit: pxfuel.com) LCLS-II First Beam Image - A snapshot of a plasma channel’s electron density profile (blue) formed inside a sapphire tube (gray) with the combination of an electrical discharge and an 8-nanosecond laser pulse (red, orange, yellow). This plasma channel was used to guide femtoseconds-long “driver” laser pulses from the BELLA petawatt laser system, which generated plasma waves and accelerated electrons to 8 billion electron volts in just 20 centimeters. (Credit: Gennadiy Bagdasarov/Keldysh Institute of Applied Mathematics; Anthony Gonsalves and Jean-Luc Vay/Berkeley Lab) Image - BELLA, the Berkeley Laboratory Laser Accelerator. (Credit: Roy Kaltschmidt/Berkeley Lab)