Rep-Rated X-ray Damage and Ablation Experiments for IFE and ICF Applications
The response of materials to high-dose x-ray exposures needs to be understood for inertial fusion energy (IFE) and inertial confinement fusion applications, where the requirements for IFE are considerably more stringent. In the IFE context, x-ray damage and/or small levels of ablation are of importance for component survivability, generation of debris, and contamination. Ablation quantities of even 1 angstrom per shot would result in material removal of more than 1 cm per year of operation. If even one part in a million of this material made its way to the final optics, it would coat them with a thickness equivalent to several waves of the laser light. Also, small-scale melting and thermomechanical effects, such as fatigue, can result from x-ray heating. These effects potentially become important when multiple shots are considered, and thus, their study requires use of rep-rated experiments. As a part of the High-Average Power Laser Program, the XAPPER experiment has been initiated at Lawrence Livermore National Laboratory. XAPPER produces high doses of low-energy x-rays at repetition rates of up to 10 Hz. Study of x-ray damage is underway. An overview of facility capabilities, results to date, and future plans are provided.
- Research Organization:
- Lawrence Livermore National Lab., CA (US)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 15005003
- Report Number(s):
- UCRL-JC-152510
- Country of Publication:
- United States
- Language:
- English
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