TY  - JOUR
AU  - Einstein-Curtis, Joshua
AU  - Jensen, Kyle
AU  - Barber, Samuel
AU  - Cook, Nathan
AU  - Edelen, Jonathan
AU  - Coleman, Stephen
AU  - Doss, Christopher
AU  - Kohrell, Finn
AU  - van Tilborg, Jeroen
AU  - Berger, Curtiss
TI  - Improved laser-plasma accelerator stability via high-bandwidth longitudinal focal position stabilization of 100 TW-class laser system
JO  - Physical review accelerators and beams
SN  - 2469-9888
CY  - College Park, MD
PB  - American Physical Society
M1  - PUBDB-2025-02459
PY  - 2025
AB  - Laser-plasma accelerators (LPAs) offer an attractive alternative to conventional accelerators for the development of compact electron sources and next-generation light sources. Due to orders-of-magnitude larger accelerating gradients, LPAs enable the acceleration of high-brightness electron beams to ultra-relativistic energies in millimeter- to centimeter-scale distances. However, LPA stability is limited by shot-to-shot fluctuations of the driving laser system. Specifically, fluctuations in the final-focus longitudinal position result in correlated instability in LPA electron beam qualities, including total beam charge, average beam energy, and energy spread. We demonstrate active stabilization of the longitudinal focal position for a 100 TW-class laser system. This repetition-rate scalable stabilization system leverages non-invasive wavefront monitoring of a copropagating, unamplified kHz pulse train to guide corrective adjustments to the focal position of a 1 Hz amplified drive laser via an upstream telescope on millisecond timescales. In this demonstration, the approach limits standard deviation fluctuations of the amplified drive beam's longitudinal focal position to +- 0.22mm (representing at least a 53
LB  - PUB:(DE-HGF)16
UR  - https://bib-pubdb1.desy.de/record/634141
ER  -