Thin-Film Electrolytes for High-Energy-Density and Low-Cost Polychalcogenide-Based Redox Flow Batteries

Montana Instruments will design and test a closed-cycle cryostat with an integrated ultra-low-vibration (ULV) cold platform. Subcontractor ColdQuanta will provide a compact ultra-high vacuum (UHV) trapped ion package subsystem module. Phase I will focus on customizations of existing ULV technologies. Montana Instruments will integrate the module on the cold platform to form a complete system targeting the needs of trapped ion quantum computing. Montana Instruments’ Cryostation s200 cryogenic platform provides a closed-cycle 3.6 Kelvin sample space with 9 optical ports and fully automated control system (see Figure 1). The base platform enables many customized modules and sample mounts. Examples of customizations for existing ion trap customers are shown in Figures 2-3. This ultra-low vibration platform has been experimentally demonstrated to successfully mount and operate homebuilt ion traps in a laboratory setting. ColdQuanta’s cryogenic ion trap housing technology enables a self-contained, high- optical access UHV environment for ion trapping with long trap lifetimes (see Figure 4). Optical access is available from six-plus angles parallel to the trap surface. Additional high numerical aperture access is available orthogonal to the trap. A Ceramic Pin Grid Array (CPGA) provides feedthroughs for DC, RF and microwave signals and has been demonstrated for 100+ pins. The trap surface is ion milled before assembly into a UHV- baked chamber to provide an ultra-clean ion trap surface. The C-cut sapphire window material ensures a low birefringence and high UV transparency and are available with a range of anti-reflection coatings for optical access from near-UV to near-IR. The housing was designed to house a Sandia HOA trap. The vacuum pressure has been demonstrated to better than 10^-12 Torr with an integrated non-evaporable getter pump. The total package volume is < 3 cm^3, which enables easy integration with Montana Instruments ultra-low-vibration cold platform. Currently, Ytterbium has been developedand demonstrated via ablation loading but the platform is compatible with additional ion species sources, which are under development. This platform has been experimentally demonstrated to successfully trap ions in a laboratory setting. Both Montana Instruments and ColdQuanta have ongoing relationships with multiple research groups at the Department of Energy and elsewhere who have expressed interest in the integration of these two technologies into a single system. Open channels of communication will ensure that the developed technology will be well suited for the needs of the DOE.