Citation
Alvarez Ruiz, Jesus and Rivera de Mena, Antonio and Gonzalez Arrabal, Raquel and Rio, E. del and Mima, Kunioki and Perlado Martín, José Manuel
(2010).
Key paramaters in the design of HiPER reaction chamber.
In: "37th EPS Conference on Plasma Physics", 21/06/2010 - 25/06/2010, Dublin, Irlanda.
Abstract
The future chamber reactor of HiPER will have to withstand short energy pulses (3 μs long) of up to 5 MJ of charged particles and X-rays with different repetition rates. Nowadays, tungsten has been selected as first wall material for a 5m radius reaction chamber. From the thermo-mechanical point of view, experiments have demonstrated that tungsten can withstand heat flux parameters up to 28 MJm-2 s -1/2 without roughening and 40 MJm-2 s -1/2 without undergoing melting. From the atomic point of view, He retention and bubble formation represents the biggest threat to its survivability, being doses of ~10 17 He/cm2 the upper limit for safe operation. Comparison of these limiting values with those proposed for a 48 MJ shock ignition target in HiPER reveals that, under a reasonable plan of 1000 fusion shots during the chamber lifetime, tungsten should guarantee a proper performance of the first wall.
