(A) Crystals embedded in nuclear grease are injected into the X-ray interaction volume. Before they are probed by X-rays, they are excited from two sides by nanosecond laser pulses.
(B) Effective laser beam geometry to excite the entire volume probed by the X-rays in the quasi-perpendicular geometry shown in (A).
(C) Pump-probe data collection with one dark exposure (dark, 33 ms) in between the laser pulses.
(D) Pump-probe data collection with two dark exposures (dark 1, 33 ms and dark 2, 67 ms) in between the laser pulses. This scheme was used to assess whether a laser-excited jet volume left the X-ray interaction region after 67 ms.