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The High-Repetition-Rate Advanced Petawatt Laser System (HAPLS) under construction at LLNL recently achieved a key average power milestone more than two months ahead of schedule, and is now moving into the next phase in its development.
The HAPLS high-energy diode-pumped solid-state pump laser, firing at a repetition rate of 3.3 Hz (3.3 shots per second), achieved 70 joules of infrared (1,053-nanometer) energy and 39 joules of green (527-nm) energy. Completion of this average-power milestone marks another major step in the HAPLS commissioning plan: the beginning of the integration of the pump laser with the HAPLS high-energy short-pulse beamline.
“Ramping the pump laser to this intermediary performance level was an important step for HAPLS,” said Constantin Haefner, program director for Advanced Photon Technologies. “For the first time we ran the pump laser at significant energy and average power levels, meeting and exceeding the required goals for this milestone. This accomplishment required a huge team effort and the team worked extremely hard to make this happen.
“We are taking a risk-balanced approach in ramping HAPLS to its full performance. The data we collected confirmed our performance models and gave the green light to start integration with the short-pulse beamline before ramping to even higher power levels.”
Representatives from the European Union’s Extreme Light Infrastructure Beamlines (link is external) (ELI-Beamlines) facility in the Czech Republic, where HAPLS will be installed, attended the demonstration. “We are delighted to see the HAPLS pump laser work with a performance exceeding the project expectations for this phase, and achieve this important milestone on budget and ahead of schedule,” said ELI Beamlines Chief Laser Scientist Bedrich Rus. “The partnership with LLNL has been a tremendously successful story, and this demonstration shows the robustness of the underlying design and technology. The L3 (HAPLS) beamline will be an ELI Beamlines’ user facility workhorse.”
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