Abstract
The world’s first 1 Hz, 1 Petawatt laser system was acquired from THALES and implemented at the Berkeley Lab Laser Accelerator (BELLA) facility. The BELLA laser is used to explore the physics of laser plasma interactions with an emphasis on development of a 10-GeV class Laser Plasma Accelerator (LPA). The temporal shape of the laser pulse is critical for LPA performance. The diagnostics (Sequoia and Grenouille) and controls for the temporal pulse shape of the laser via the incident angle to the compressor gratings are discussed. For the first experimental campaign, the BELLA laser delivered pulses with pulse length of ∼ 40 fs full-width-half-maximum and pulse contrast of ∼ 1 × 10−8 at 30 ps.
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