[PDF][PDF] SBS PCM technique applied for aiming at IFE pellets: First tests with amplifiers and harmonic conversion

M Kalal, HJ Kong, M Martinkova… - Journal of the Korean …, 2010 - researchgate.net
M Kalal, HJ Kong, M Martinkova, O Slezak, JW Yoon
Journal of the Korean Physical Society, 2010researchgate.net
One major issue in the inertial fusion energy (IFE) integrated approach concerns a
successful symmetric irradiation of thermonuclear targets (pellets) inside the reactor
chamber by powerful laser beams with a total energy of~ 1MJ [1]. For the direct drive
scheme, the following set of parameters is being considered: pellets of 4mm in diameter
should be delivered into an area of 5 mm in diameter centered inside a reactor chamber with
a 10 m diameter. For homogenous irradiation, it is necessary to point the laser beams on the …
One major issue in the inertial fusion energy (IFE) integrated approach concerns a successful symmetric irradiation of thermonuclear targets (pellets) inside the reactor chamber by powerful laser beams with a total energy of~ 1MJ [1]. For the direct drive scheme, the following set of parameters is being considered: pellets of 4mm in diameter should be delivered into an area of 5 mm in diameter centered inside a reactor chamber with a 10 m diameter. For homogenous irradiation, it is necessary to point the laser beams on the pellet’s surface with an overall precision~ 20 µm (precision of both tracking and aiming~ 14 µm)[2]. To achieve such a level of precision, some adjustments of the final optics for every shot and every laser beam would always be necessary. Taking into consideration realistic obstacles, eg, collisions with debris from previous shots due to the expected 5-10Hz repetition rate, bringing pellets into an acceptable vicinity of the optimal position for irradiation simultaneously with the required precision of laser energy delivery represents a real challenge. Despite intensive research efforts
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