J D Kalow, J T Hinchen, G Harris, E Koukina, D M Harrington, P C McDaniel, N J Brennan, A Golossanov, I D Spool, D Zajac, M Mundt, S Varner, M Russell, S Bull, K McCormack, D Mayer, L E Knaian, M Khandaker, W Stadolnik, W R Cutler, A Sampat, K Lau, J Betances, C Fagan, C R Shmayda, M Koch, K Payne, N J L MacFadden, J Simon, K Peterson, A Gami, S Machavarapu, A Tejeda, J Katz, J A Allen, R Chaney, K Kem, I Kiniti, E Garcia Badaracco, K R Lynch, P Gandhi, C J Johnstone, E Niner, C C Petitjean, A Antognini, W T Shmayda, S O Newburg, A N Knaian
A new large-volume diamond anvil cell (DAC) has been developed for the Muon-catalyzed Fusion (μCF) Experiment (MuFusE), enabling the compression and heating of deuterium-tritium (d-t) mixtures to pressures and temperatures needed to advance μCF research. The MuFusE DAC achieves the large sample volumes necessary for high-precision fusion measurements while integrating cryogenic loading, all-metal sealing, and flexible bellows to maintain a secure environment during cell compression. Combined with remote pneumatic actuation and secondary containment, the DAC safely managed a 25 Ci tritium inventory while providing a clear optical path for in situ measurements of sample pressure and composition via laser spectroscopy. Utilizing 5 mm diameter diamond anvils oriented in the path of a high-intensity muon beam, the apparatus achieved a stable sample volume of 19.2 mm3 at liquid density, pressures up to 933 MPa and temperatures up to 400 K-benchmarks that significantly exceed previously reported limits for static d-t targets.