Surface characterization of ICF capsule by AFM-based profilometer

Abstract

Outside surface fluctuations of inertial confinement fusion (ICF) capsule greatly affect the implosion performance. An atomic force microscope (AFM)-based profilometer is developed to precisely characterize the capsule surface with nanometer resolution. With the standard nine surface profiles and the complete coverage data, 1D and 2D power spectra are obtained to quantitatively qualify the capsule. Capsule center fast aligning, orbit traces automatic recording, 3D capsule orientation have been studied to improve the accuracy and efficiency of the profilometer.

Review of HPLSE special issue on target fabrication

“…Papers on metrology cover a wide range of disciplines within target fabrication, detailing the measurement of adhesive wicking into foams [18] , the mechanical properties of ultra-thin polymer films [19] and the surface characterization of ICF capsules [7] .…”

“…Importance of limiting hohlraum leaks at cryogenic temperatures on NIF targets [6] 14. Surface characterization of ICF capsule by AFMbased profilometer [7] 15. Design and fabrication of gas cell targets for laboratory astrophysics experiments on the Orion highpower laser facility [9] 16.…”

“…Submissions for the special issue covered the invited topics and also branched out into broader areas and capabilities. Papers described research on: techniques for the production of targets for inertial confinement fusion (ICF) [1][2][3][4][5][6][7][8] , micro-assembly [3,8,9] , liquid targets [10] , systems for delivery of targets at high repetition rates [5,11,12] , fundamental target fabrication processes [2,4,[13][14][15][16] , low density materials [15,17,18] and metrology methods [7,18,19] . In addition, there were three important review papers [1,5,12] that give an excellent snapshot of the current capabilities across the world.…”

“…Papers on ablator materials including different beryllium copper/carbon compound mixes [4] and the fundamental physical properties of the films and coatings were published. Characterization of shells using atomic force microscope (AFM) techniques [7] and hohlraum manufacture and leak characterization papers [6] were published. Cryogenic filling and layering of shells are addressed in a wide ranging paper [5] .…”

“…Special issue content Development of target fabrication for laser-driven inertial confinement fusion at research center of laser fusion [1] Permeation fill-tube design for inertial confinement fusion target capsules [2] Fluid sample injectors for X-ray free electron laser at SACLA [10] Efficient offline production of freestanding thin plastic foils for laser-driven ion sources [13] A new spatial angle assembly method of the ICF target [3] An investigation progress toward Be-based ablator materials for the inertial confinement fusion [4] Review on high repetition rate and mass production of the cryogenic targets for laser IFE [5] An automated, 0.5 Hz nano-foil target positioning system for intense laser plasma experiments [11] Laser-induced microstructures on silicon for laser-driven acceleration experiments [14] Developing targets for radiation transport experiments at the Omega laser facility [15] Targets for high repetition rate laser facilities: needs, challenges and perspectives [12] Large-area suspended graphene as a laser target to produce an energetic ion beam [16] Importance of limiting hohlraum leaks at cryogenic temperatures on NIF targets [6] Surface characterization of ICF capsule by AFM-based profilometer [7] Design and fabrication of gas cell targets for laboratory astrophysics experiments on the Orion high-power laser facility [9] REACH compliant epoxides used in the synthesis of Fe(III)-based aerogel monoliths for target fabrication [17] Assembly and metrology of NIF target subassemblies using robotic systems [8] Modeling the mechanical properties of ultra-thin polymer films [19] X-ray computed tomography of adhesive wicking into carbon foam [18] …”