Imperial College London


Faculty of Natural SciencesDepartment of Physics

Professor of Physics



z.najmudin Website




736Blackett LaboratorySouth Kensington Campus






BibTex format

author = {Dann, SJD and Baird, CD and Bourgeois, N and Chekhlov, O and Eardley, S and Gregory, CD and Gruse, J-N and Hah, J and Hazra, D and Hawkes, SJ and Hooker, CJ and Krushelnick, K and Manles, SPD and Marshall, VA and Murphy, CD and Najmudin, Z and Nees, JA and Osterhoff, J and Parry, B and Pourmoussavi, P and Rahul, S and Rajeev, PP and Rozario, S and Scott, JDE and Smith, RA and Springate, E and Tang, Y and Tata, S and Thomas, AGR and Thornton, C and Symes, DR and Streeter, MJ},
doi = {10.1103/PhysRevAccelBeams.22.041303},
journal = {Physical Review Accelerators and Beams},
title = {Laser wakefield acceleration with active feedback at 5 Hz},
url = {},
volume = {22},
year = {2019}

RIS format (EndNote, RefMan)

AB - We describe the use of a genetic algorithm to apply active feedback to a laser wakefield accelerator at a higher power (10 TW) and a lower repetition rate (5 Hz) than previous work. The temporal shape of the drive laser pulse was adjusted automatically to optimize the properties of the electron beam. By changing the software configuration, different properties could be improved. This included the total accelerated charge per bunch, which was doubled, and the average electron energy, which was increased from 22 to 27 MeV. Using experimental measurements directly to provide feedback allows the system to work even when the underlying acceleration mechanisms are not fully understood, and, in fact, studying the optimized pulse shape might reveal new insights into the physical processes responsible. Our work suggests that this technique, which has already been applied with low-power lasers, can be extended to work with petawatt-class laser systems.
AU - Dann,SJD
AU - Baird,CD
AU - Bourgeois,N
AU - Chekhlov,O
AU - Eardley,S
AU - Gregory,CD
AU - Gruse,J-N
AU - Hah,J
AU - Hazra,D
AU - Hawkes,SJ
AU - Hooker,CJ
AU - Krushelnick,K
AU - Manles,SPD
AU - Marshall,VA
AU - Murphy,CD
AU - Najmudin,Z
AU - Nees,JA
AU - Osterhoff,J
AU - Parry,B
AU - Pourmoussavi,P
AU - Rahul,S
AU - Rajeev,PP
AU - Rozario,S
AU - Scott,JDE
AU - Smith,RA
AU - Springate,E
AU - Tang,Y
AU - Tata,S
AU - Thomas,AGR
AU - Thornton,C
AU - Symes,DR
AU - Streeter,MJ
DO - 10.1103/PhysRevAccelBeams.22.041303
PY - 2019///
SN - 2469-9888
TI - Laser wakefield acceleration with active feedback at 5 Hz
T2 - Physical Review Accelerators and Beams
UR -
UR -
UR -
VL - 22
ER -