Current LH2-absorber RandD in MuCool by Cummings, M, Allspach, D, Bandura, L, Black, E, Cassel, K, Dyshkant, A, Errede, D, Geer, S, Greenwood, J, Haney, M, Hedin, D, Ishimoto, S, Johnstone, C, Kaplan, D, Kubik, D, Kuno, Y, Lau, W, Majewski, S, Norem, J, Norris, B, Popovic, M, Reep, M, Summers, D, Yoshimura, K