IceCube Gen2
IceCube-Gen2 is the planned next generation of the IceCube Neutrino Observatory, expanding the detector to approximately 10 cubic kilometers. IceCube currently uses 86 strings of digital optical modules embedded in the Antarctic ice, while the IceCube Upgrade added six densely packed strings to improve the detection of lower-energy neutrinos. IceCube-Gen2 is designed to expand the detector’s reach by placing strings much farther apart, with proposed spacing of approximately 750 meters.
Neutrinos provide a unique way to study the universe because they can travel enormous distances without being significantly affected by matter or magnetic fields. Detecting more high-energy neutrinos will help scientists investigate the violent astrophysical events that produce them and observe parts of the universe that cannot be studied through light alone.
The exceptional clarity of the Antarctic ice makes this larger spacing possible. By placing sensors farther apart, IceCube-Gen2 will instrument a much larger volume and increase its ability to detect high-energy neutrinos.
PSL Engineering for IceCube-Gen2
IceCube-Gen2 is currently in the design and planning stage; construction and deployment of the new detector have not yet begun. PSL engineers are developing and evaluating the systems that will be needed to drill, deploy, and operate the expanded detector.
Engineering the Detector
PSL is contributing to the design of systems across the Gen2 drilling and deployment infrastructure. This includes:
- Drilling and thermal systems: Independent Firn Drill, redesigned Rodwell Drill, Main Heating Plants, Pre-Heat System, water tanks, and High Pressure Pumps
- Power systems: microturbine generators and solar power systems
- Deployment systems: Tower Operations Structures, cable and hose reels, and fuel tower
- Controls and instrumentation: Drill Control Center and Digital Optical Modules
- Structural hardware: towers, frames, pressure vessels, piping, and supporting structures
Many of these designs build on PSL’s experience with the original IceCube detector and IceCube Upgrade. For Gen2, engineers are focusing on modernization, reliability, easier maintenance, reduced weight, modularity, and efficiency.
Testing and Improving the Technology
Increasing the spacing between drill sites from approximately 125 meters to 750 meters creates new mechanical and logistical challenges. Equipment must travel farther between sites, hoses and reels become more difficult to move, and heated water can lose more energy as it travels to the drill.
Weight is also a major consideration. While IceCube equipment was primarily transported by LC-130 aircraft, larger Gen2 equipment will need to be compatible with South Pole Overland Traverse operations. PSL’s designs must balance strength and reliability with the ability to transport and assemble equipment in an extremely remote environment.
The planned optical drilling system is designed to reach up to 21 holes per season, complete a hole within 48 hours, and deliver approximately 4.7 MW of thermal power to the drill nozzle.
Designing for Antarctica
PSL is testing and evaluating designs before they can be deployed to Antarctica. Facilities such as the Drill Test Bed and controlled environment rooms allow engineers to test equipment under low-temperature conditions and identify potential problems early in the design process.
PSL is also building on technology developed for IceCube Upgrade, including work on optical modules, drilling systems, and load-sharing. These projects provide experience that can inform the larger and more demanding systems planned for IceCube-Gen2.
Although construction has not yet begun, PSL’s ongoing engineering work is helping develop the technologies and systems needed for the next generation of neutrino detection.
Future Work
PSL will develop, prototype, and evaluate Gen2 systems before they can be deployed to Antarctica. Prototype work will include the 18 Long Optical Monitor (LOM-18), which will help inform the design of the optical modules planned for Gen2. Testing will also be used to evaluate equipment under conditions relevant to Antarctic operations, including work in the Drill Test Bed and Duck Pond.
The project will also build on technologies and lessons from IceCube Upgrade, including optical modules, drilling systems, and load-sharing. These efforts will help identify potential problems and refine designs before deployment.
Planned improvements will include microturbine power generation, solar power, updated heating and pumping systems, redesigned drilling equipment, improved hose and reel systems, and updated drill controls. These changes will aim to improve reliability, reduce setup time and labor requirements, increase mobility between drill sites, and make the system better suited to remote Antarctic operations.
Requirements
- Optical Drill Requirements
- Reach up to 21 holes per season with spacing of 750 m between holes
- Complete one hole every 48 hours (firn hole not included and not serial)
- Crew of 28 people (3 shifts of 9 people plus lead)
- Fuel budget of 6000 gallons per hole
- 4.7MW thermal delivery to drill nozzle
- Compatible with trending logistics From LC 130 to vessel and Traverse
- Improvement Opportunities
- Safety -> Model 75 operate at low pressure and farther from boiling point
- Mobility -> Farther between holes and less grooming -> ARCS
- Reliability -> Micro turbines have high reliability.
- Reduced setup time with integrated Tower Operations site
- Reduced Labor Requirements -> Possible with better reliability and more automation
Learn More
Learn more from the IceCube Gen2 Website and the Gen2 Project Brief!
Learn more about IceCube Gen1 and the IceCube Upgrade here!
