Fig. 1. Schematic of DiPOLE100X amplifier chain, showing typical output energy at each amplifier stage: YDFO  Yb–silica fibre oscillator; YDFA  Yb–silica fibre amplifier (inc. temporal pulse shaping); PA  room-temperature preamplifier (1  Yb:CaF ₂ regenerative, 2  Yb:YAG multi-pass); MA  main cryogenic amplifier (ceramic Yb:YAG multi-slab).

Fig. 2. 3D model of DiPOLE100X: FFE  fibre front end, DP  diode pumps, cGC  cryogenic gas coolers, DM  deformable mirrors, BD  beam diverter, FFE  fibre front end (not shown).

Fig. 3. Schematic layout of the front end for DiPOLE100X.

Fig. 4. X-ray pulse timing diagram for SASE II beamline.

Fig. 5. DiPOLE100X timing diagram.

Fig. 6. Schematic showing 7-pass angularly multiplexed extraction architecture of the 10 J cryo-preamplifier. DP  diode pumps, DM1  10 J deformable mirror, BS  beam splitters.

Fig. 7. (a) Photograph of the DiPOLE100X 10 J bimorph deformable mirror, built at the CLF, with inset showing schematic of electrode pattern, (b) corrected output wave front and (c) far-field CCD camera image measured at 10 J, 10 Hz on the DiPOLE prototype amplifier.

Fig. 8. Energy stability over half an hour with inset showing measured temporal pulse shape for amplification of 2.2 ns pulses at 8 J, 10 Hz.

Fig. 9. Schematic showing 4-pass, off-axis, angularly multiplexed extraction architecture of the 100 J cryo-amplifier. DP  diode pumps, DM2  100 J deformable mirror, BD  beam diverter.

Fig. 10. (a) Photograph of new 100 J deformable mirror, (b) target aberrated wave front and (c) residual error in generated wave front.

Fig. 11. Synoptic screen for control and monitoring of 10 J cryo-preamplifier. Red lines correspond to the main 1030 nm laser beam path, input from the FE (left) and output to the beam transport section (right); blue lines represent diagnostic beam paths; and orange lines correspond to 940 nm pump diode beam paths.

Fig. 12. Temporal pulse shaping results at 6.5 J, 10 Hz obtained using the DiPOLE prototype amplifier (a) flat-top and (b) multi-step pyramid pulse profiles.

Fig. 13. Time lapse photographs of DiPOLE100X build with 3D CAD view of completed system.

Fig. 14. Schematic showing the main components of the HED instrument.

Fig. 15. Layout of DiPOLE100X in laser hutch at the HED instrument.

Table 1. Target parameters for DiPOLE100X and demonstrated performance

Table 2. Functionality of user control screens in DiPOLE100X control system