Beam and target alignment at the National Ignition Facility using the Target Alignment Sensor (TAS)

Target alignment in the Shen-Guang II Upgrade laser facility

“…When the BCS, TCS and DCS were all coupled with the CCS, the beam and target alignment could be performed in one reference system, the DCS. Although various alignment devices and procedures have been reported in the different laser fusion facilities, such as the NIF [17–19] , LIL [20] , LMJ [21, 22] and SG-II [11] , the principle of the target alignment in these facilities is similar to that described in this work. In the SG-II-U facility, the target alignment system was flexible and the baseline cylindrical hohlraums, the primary and backlighter targets, and the hohlraums with a golden cone could be aligned.…”

Determining the center of the interaction chamber of a multichannel laser installation

“…CONCLUSION We have considered three methods of determining the coordinates of the center of the TC and a device for implementing the methods. At the experimental prototyping stage, a choice was made in favor of a design version of a TCCS with Number of pixels More than 15 × 10 6 (for example, 4872 × 3248) Pixel size, μm 2 At most 10 × 10 Bit count of ADCs, bit 12 (8) Maximum frame rate, frame/sec 3 Sensitivity, lux 0.02 (mono) SNR, dB More than 56 a cubic 3D mark that takes into account the possibility of using it for full-scale adjustment of the laser channels of the installation, with focusing of the radiation of the beams into specified points in the central region of the TC. The TCCS of the developed design makes it possible to match an electronic 3D model of the TC with a system of bodies consisting of the target simulator, the 3D marks, the targets, the final optical modules, etc.…”

Alignment of an x-ray imager line of sight in the National Ignition Facility (NIF) target chamber using a Diagnostic Instrument Manipulator (DIM) and Opposed Port Alignment System (OPAS)

“…The Target Alignment Sensor (TAS) is an instrument that inserts into the target chamber on a boom and is used to align the NIF laser beams relative to the NIF target 6 . The TAS is aligned relative to the TCC coordinate frame with the Chamber Center Reference System (CCRS), which is treated as the absolute reference.…”