Validation of prediction capability of operating space for plasma initiation in MAST-U oleh Hyun-Tae Kim, Fabien Jaulmes, Hana El-Haroun, Geof Cunningham, Charles Vincent, Lucy Kogan, Rory Scannell, Sarah Elmore, Francis Casson, Stuart Henderson, Andrew Thornton, James Harrison, Xavier Litaudon, Gloria Falchetto, Jack Lovell, Jeongwon Lee, Hong-Sik Yun, Yeongsun Lee, Runze Chen, MAST-U team